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-版築の材料特性に関する実験的研究-
齊藤 正, 寺井 雅和, 難波 義郎
2018 年 24 巻 57 号 p.
487-490
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
The architectures had been constructed with the solidified product of soil for the modern architecture in the developing country and the landmarks in all over the world. In the advanced country, the industrial method with soil is being recognized again. The industrial method with soil has the following features: 1) The long time and non-productive to construct, 2) It is easy to construct by human power, 3) Local production for local consumption. This study describes the results of tests aimed at finding out the material properties of soil materials for the construction of Hanchiku architecture. Some experiments were conducted to clarify durability, water absorption, design, strength and so on.
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飯島 玲, 杉山 央
2018 年 24 巻 57 号 p.
491-496
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
Concrete is delivered from ready-mixed concrete plants to construction sites in the form of unhardened half-finished materials. Proper strength and durability can be verified only after its hardening. Therefore, it can be said that concrete is a construction material that requires a traceability assurance system that is more meticulous than those for other industrial products. We are developing a technology to assure traceability of concrete by making use of the IC tag. This paper describes a study on the various information regarding concrete production/works recorded and maintained in the traceability system.
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深瀬 孝之, 谷口 円, 開 洋介, 濱 幸雄
2018 年 24 巻 57 号 p.
497-500
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
In this paper, equivalent age method and maturity method based on the temperature history of concrete were examined as strength estimation method for removal of sheathing. In strength development of two methods, it is relatively consistent in ordinary Portland cement, high-early-strength Portland cement. But there was a tendency that the difference was large in Portland blast-furnace slag cement (BB), Portland fly-ash cement (FB). Under the conditions of this report, the applicability of maturity method for FB was confirmed, but in application to estimating strength, it is necessary to consider the influence of kind of admixture and substitution rate.
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宗川 陽祐, 中野 達也, 増田 浩志
2018 年 24 巻 57 号 p.
501-506
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
In this paper, stress strain states around weld toe and deformation capacity limited by ductile crack initiation of cold formed SHS column to through diaphragm robotic welded connection using 25 degrees narrow groove are evaluated by finite element analysis. Analytical parameter is the shape of excess metal determined by the result of sensitivity analysis of stress concentration factor. As a result, there was a correlation between the stress concentration factor and the deformation capacity of column.
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吉津 利洋
2018 年 24 巻 57 号 p.
507-511
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
In general, the reinforcing bar of the CO2 arc welded joints, are using a steel backing material. However, the steel backing material melting and becomes integrated with the welded portion. For this reason, it is impossible to visually confirm the initial layer portion. Therefore, by painting a paint containing aluminum as a main component on the outside of the backing material, the paint discolored by welding heat input. By using this phenomenon, we propose that it can be visually confirmed. In the CO2 gas arc welded joint of the reinforcing bar, when the difference between thermally discolored width and root gap is less than 4.8 mm, it was found that the reinforcing bar end face was sufficiently integrated.
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中田 善久, 宮田 敦典, 大塚 秀三, 河崎 慎吾, 住井 次郎
2018 年 24 巻 57 号 p.
513-516
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
This paper deals with investigation in the actual state on the acquisition of qualified person and qualification allowance of concrete pumping worker in concrete pumping methods. Therefore we investigated special education, person taking a course of lectures, certified concrete pumping operator and register concrete pumping sent worker. Moreover, we conducted a questionnaire survey about qualification allowance of concrete pumping in Tokai area. As a result, Construction companies request deploying qualified person into construction sites, but in most cases Construction companies don’t pay pumping worker qualification allowance.
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ー長寿命化を考慮した建物の合理的保全に関する研究 ー
道正 泰弘
2018 年 24 巻 57 号 p.
517-522
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
Longevity of building is highly essential from the viewpoint of Life Cycle Assessment (LCA). In order to promote the longevity of building, it is necessary to achieve three basic concepts: (1) assurance of safety and quality, (2) decrease of environmental load, and (3) increase of cost effectiveness of construction.
This paper presents a case study to rationalize the maintenance priority for aging buildings. The proposed method is applied to maintenance for a nonstructural member of the large-scale industrial building such as thermal power station etc. As a result, the proposed maintenance priority judgment method was confirmed to a highly effective manner reducing both cost and environmental load in LCA.
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岡田 明也, 渡辺 宗幸, 齋藤 俊克, 出村 克宣
2018 年 24 巻 57 号 p.
523-528
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
This paper deals with the rust-inhibiting properties of patching materials containing chloride ion fixing admixture and nitrous acid type admixtures by the outdoor exposure of specimens modeling RC structure. As a result, the self potential of rebar differs from base and patch sides for the chloride ion fixing admixture. Such differences are considerably recognized for the nitrous acid type admixtures. Regardless of the self potential of the rebar, the corrosion of rebar is not recognized at the patch side. The macro-sell corrosion of the rebar is occurred in the base side, and increased with increase in the chloride ion content.
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澁井 雄斗, 濱崎 仁, 須藤 裕司, 佐藤 滉起
2018 年 24 巻 57 号 p.
529-534
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
Repairing method using lithium nitrite for reinforced concrete structures under severe salt damage environment has been proposed. The authors evaluated the corrosion inhibiting effect for each repair method under presence or absence of neutralization and difference in indoor or outdoor environmental. We propose suitable repair methods according to each environmental condition.
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藤田 正則, 浦 正凛, 杉原 大祐, 大野 文義
2018 年 24 巻 57 号 p.
535-539
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
Thin steel plates galvanized are used for steel-framed house, roof and wall and their metal fittings of building structures. Bolts generally used to join metal fitting have zinc galvanized specification which is classified into electro-galvanizing coatings of zinc on steel, hot dip galvanized coatings on steel. Corrosion occurs in not only metal fittings but also bolts, caused by the presence of moisture and oxygen, depending on the environmental conditions. The degree and form of the corrosion is different. In this paper, the combined cyclic accelerated corrosion test of galvanized bolts of the roof metal fitting and tensile test are conducted. Tensile strength of galvanized bolts under corrosion is evaluated.
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松沢 晃一, 田沼 毅彦, 棚野 博之, 橘高 義典
2018 年 24 巻 57 号 p.
541-546
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
Study on service of applied conditions and structure performance about members post-installed anchor used are being carried out. This paper reports on the influence of specimen size and testing condition on pull-out properties of post-installed anchor. And the follow conclusions were found: as for the mechanical anchor, pulling behaviors and maximum loads were similar, but these were different for the bonded anchor.
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山中 祐一, 石原 直, 山田 哲, 元結 正次郎, 清家 剛, 脇山 善夫
2018 年 24 巻 57 号 p.
547-552
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
In general, it is difficult to calculate floor accelerations of main frames in non-linear seismic responses for seismic design of non-structural components. A formula to calculate them without time history analysis and eigenvalue analysis has been proposed by authors. Based on the formula, this paper verifies applicability of the formula to real building models and proposes a practical way of setting strength factor in the formula. By comparing the results by time history analysis, it is confirmed that the formula gives good estimation for floor accelerations.
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濱本 卓司, 倉田 成人, 猿渡 俊介, 河本 満, 富岡 昭浩, 大胡 拓矢
2018 年 24 巻 57 号 p.
553-558
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
Combination of image-sound-vibration integrated sensing and robust data transfer is used to construct a change detection system of building group in urban areas in preparation for unexpected events. The field test under severe condition has been performed in the remote island, Gunkanjima. Nine buildings on the island are selected to monitor the long-term evolution of damage and deterioration through sensor fusion of MEMS acceleration sensor network for vibration sensing, microphone array for sound sensing and surveillance camera network for image sensing. The overall framework and current situation of the Gunkanjima monitoring are reported and future perspective is presented.
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安藤 佳奈, 佐藤 利昭, 北村 春幸, 松田 頼征, 戸根 弘希, 小笠原 和也, 大島 猛志
2018 年 24 巻 57 号 p.
559-563
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
This paper describes a simple model for analyzing the acceleration response of an elevator-type high-rise mechanical parking system in a high-rise building. It is based on a previously proposed 3D model, and involves both Voigt model representing the rubber dampers, and bending-shear elements representing two types of columns. The validity of this model is verified by comparing the acceleration response obtained using the previously proposed 3D model, which is an important factor when considering the business continuity plan for such parking systems.
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永野 正行, 渡辺 眞伍, 日野浦 雄高, 鈴木 賢人
2018 年 24 巻 57 号 p.
565-570
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
The objective of this report is to estimate the indoor damages of super-high-rise residential buildings during the 2016 Kumamoto earthquake through a questionnaire survey for residents. The survey was conducted for 8 super high-rise residential buildings in Kyushu Island including three in Kumamoto City in late May 2016, about 1 month after the main shock. Intensity of floor shaking in Kumamoto City was much stronger than that in Kanto area during the 2011 Tohoku earthquake. Cracks in wallpaper were noticeable in the middle floors which is different from the Kanto case, partly due to different characteristics of input motions.
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中井 亜里沙, 佐藤 大樹, 村上 智一, 笠井 和彦
2018 年 24 巻 57 号 p.
571-576
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
The purpose of this paper is to evaluate stiffness of a base-isolation layer and a super-structure of high-rise seismic isolated building from the earthquake response observation records with different amplitude levels. As a result, the stiffness of the base-isolation layer based on observation records was close to the design value. As the amplitude increased, the stiffness of the super-structure reduced - confirming the amplitude dependence of the super-structure.
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吉江 一馬, 佐藤 大樹, 松田 頼征, 北村 春幸, 中村 昌弘, 森 隆浩, 加藤 秀章
2018 年 24 巻 57 号 p.
577-582
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
Past study had proposed a design method for base isolated structure considering tensile strain. Therefore, this paper proposes a method to predict the tensile strain of laminated rubber bearings and the moment of beams due to superimposed horizontal and vertical responses using constant energy rule. This proposed method considers that the tensile modulus of rubber bearing is lower than its compression modulus.
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松尾 智恵, 川口 衞
2018 年 24 巻 57 号 p.
583-586
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
The environment of structural design changes from day to day, corresponding to the development of computer tools. Recently “Microsoft Office Excel” installed solver which enables executing optimization problem. Moreover, “Windows Script Host” enables the user to automate operation process on Windows machine. By utilizing these tools, we try to introduce optimization methods to structural design in practice. Two problems are implemented herein. First is searching of optimal form of a bridge with tree structure system. Second is searching of optimal column position of a steel latticed shell roof.
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古垣内 靖, 中沢 楓太, 川崎 健二郎
2018 年 24 巻 57 号 p.
587-590
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
The calculation method of horizontal soil spring for spread foundation proposed in this paper is able to assess horizontal soil springs of various individual foundation groups with considering interactions among spread foundations. In addition, the horizontal soil spring of the spread foundation with complex shape can be easily evaluated due to discretizing aggregate of circular foundation. The validity of the calculation method was confirmed by comparing calculated results against those of elastic finite element analysis and elastic theory.
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人力による張力導入法と張力導入計画(その1)
川口 健一, 水谷 圭佑, 藤原 淳, 今井 公太郎, 本間 健太郎
2018 年 24 巻 57 号 p.
591-596
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
The authors have developed tensegrity frames that are stiff enough, as a structural skeleton, to support a membrane roof. A tower and a truncated pentagonal prism tensegrities were designed and constructed successfully. The paper reports the progress of their design, structural analysis and construction scheme checked with 1/10 scale model test. The authors insisted to manual pretensioning through the construction and it required special careful plan for tension introduction scheme.
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平木 達也, 川口 健一, 西崎 慶, 大矢 俊治
2018 年 24 巻 57 号 p.
597-600
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
A safety net is an effective fail-safe measure against the accidental collapse of ceilings. However free-fall of heavy ceiling panels may induce a high impact load to the supporting point of the nets. In order to reduce it, the authors propose the shock absorbers using wire clips. To examine the effect of them, the authors have conducted some experiments and the results are shown in the paper. Some numerical analyses are also described. The results show the shock absorbers can reduce maximum tension the wires experience by about 40%.
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岡本 滋史, 五十田 博
2018 年 24 巻 57 号 p.
601-606
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
The purpose of this research is to clarify double shear with force acting in the opposite direction of bolted joints with the steel side plates. Experiment verified the validity of calculation method of shear stiffness by theory of a beam on elastic foundation and calculation method of shear yield strength by European yield theory. And it was clarified that shear performance of double shear with force acting in the opposite direction and single shear are the same if the bolt length is more than a certain value.
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村上 勝英, 三松 あずさ, 江坂 佳賢, 塩崎 征男, 小松 賢司, 村上 雅英
2018 年 24 巻 57 号 p.
607-612
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
Authors have developed a two-way flat slab system that is composed of double layered Cross Laminated Timber (CLT) in order that strong axial directions of CLT can be orthogonally arranged in the slab. Glued-in-rod (GIR) joint system is adopted for joining between the CLTs. Performance of GIR joint systems in several parts of the slab is investigated by using element experiments in tensile, and performance of CLT keyed beam for the CLT flat slab is investigated by using actual slab experiments in bending.
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秋山 信彦, 岡本 滋史, 森本 知宏, 村上 雅英
2018 年 24 巻 57 号 p.
613-618
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
We developed a timber shear wall in steel frame structure and estimated the required performances to be introduced in the 5 storey building. Firstly, we designed the shear walls of this system to satisfy the requirements and conducted the full-scale shear tests to grasp the characteristics of the failure behaviors and the actual properties of the walls. Secondly, we proposed the analytical model and compared to the test results to verify the possibility for predicting them. It was concluded that the walls adopting Cross-Laminated-Timber could achieve the required performances and their mechanical behaviors could be predicted fairly precisely.
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佐藤 信夫, 花里 利一, 内田 龍一郎, 荻原 幸夫, 三須 基規, 坂本 功, 高山 峯夫, 中井 孝, 近藤 典夫
2018 年 24 巻 57 号 p.
619-624
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
A response control technique of the central column of a timber five storied pagoda was successfully developed. It was demonstrated that response displacement of the central columns’s top would be reduced by 50% by the developed control vibration device installed between the structural frame and the central column. This technique was applied to a newly built timber five storied pagoda in Fukuoka. Earthquake monitoring to verify not only the analysis model but also effectiveness of the installed device has been performed since the construction completion. 3-dimensional analysis utilizing a non-linear frame model was compared with both the microtremor measurement and the two earthquake records.
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遠藤 清一, 稲山 正弘, 小林 研治, 青木 謙治, 那須 秀行
2018 年 24 巻 57 号 p.
625-630
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
This paper aims for developing a high strength diaphragm using mating connection of plywood. We made an evaluation formula of the load bearing wall with mating connection and compared it with the result of the full-scale experiments. From the results, we calculated the actual efficiency of the mating connections. When calculating the evaluation formula with its actual efficiency, the calculated value and the experimental value became close values. Future challenge is to elucidate the mechanism of its efficiency.
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岡本 滋史, 安曇 良治, 車田 慎介, 河村 進, 村上 雅英
2018 年 24 巻 57 号 p.
631-636
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
The purpose of this research is to clarify the influence of difference in size of horizontal diaphragm on shear performance. The subject of research is horizontal diaphragm reinforced with shear key along CLT joints. At first, we confirmed the influence of difference in size of horizontal diaphragm on shear performance by experiment. Next, we confirmed it by numerical analysis of many patterns. As a result, the influence of difference in size of horizontal diaphragm on shear performance was shown.
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江坂 佳賢, 村上 勝英, 村上 雅英, 稲山 正弘
2018 年 24 巻 57 号 p.
637-642
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
Authors focused on the roof frame of buildings as effective wood utilization parts. In order to realize timber framework by GIR joint system, we conducted several experiments to develop a method for evaluating joint performance and applied it to the assumed design model. In this paper we report on its contents.
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田尾 玄秀, 佐々木 賢太, 河原 大, 稲山 正弘, 藤田 和彦, 大野 英克, 亀山 雄搾, 大塚 紘平
2018 年 24 巻 57 号 p.
643-648
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
We studied and developed tensile joint of wood with round bar steel and washer, which can be adapted in wooden king-post truss or wooden parallel chord truss and so on. Upon developing, we had conducted tensile element test and grasped the characteristics of those. In 2015, a revised edition of JIS A 3301-2015 (Design standards for wooden construction of school buildings), adopting these tensile joint of wood with pulling bolts in roof structure of king-post truss, was published.
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速水 紀文, 村瀬 詩織, 杉野 未奈, 林 康裕
2018 年 24 巻 57 号 p.
649-654
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
We propose the completely non-destructive test using impact elastic waves for estimating the material properties of large diameter wood. In this test, splits in the wood have little effect on the measurement. We confirm the relationship between the surface and the cross section distributions of the wave velocity measured with the proposed test. Furthermore, we discuss the method to estimate the material properties based on the wave velocity of the wood surface. There is a possibility that the Young’s modulus can be estimated approximately by measuring 4 points equally dividing the wood surface in the circumferential direction.
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阿部 隆英, 樋渡 健, 坂本 啓太, 高瀬 裕也, 香取 慶一
2018 年 24 巻 57 号 p.
655-660
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
In seismic retrofitting of existing building, concrete surface are chipped using an electric chipping hammer in order to connect retrofitting members to R/C frames. The roughened concrete surface has very complex concavo-convex shape. Therefore, estimating of the shear strength is very difficult.
In this paper, we conducted the shape-measurement and shape-analysis of roughened concrete. In addition, the shear tests are also conducted. Using the obtained data, we tried to evaluate the shear strength as sum of strength by bearing stress and by local interlocking. As a result, it was concluded that the optimal area ratio rcr was about 0.3.
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北堀 隆司, 永野 正行, 田沼 毅彦, 小田 聡, 日野浦 雄高, 金子 知宣, 肥田 剛典, 鈴木 賢人
2018 年 24 巻 57 号 p.
661-666
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
Database on the structural characteristics of super high-rise residential buildings are constructed based on documents for the 77 buildings used in the structural design. The masses, linear and nonlinear springs are statistically compiled in terms of normalized height-wise distribution using vibration analysis models for the 39 super high-rise RC buildings. Nonlinear earthquake responses of these buildings are evaluated using several input motions used in the structural design. Equivalent natural periods are found to increase 1.8 times from the initial condition for the level-2 excitation.
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河崎 守, 大村 哲矢, 石井 亮太
2018 年 24 巻 57 号 p.
667-672
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
Less number of specimen with the shear span ratio of 0.50 or less were test, because it is extremely hard to set it up. FE analysis can resolve above issues. In addition, the concrete strength reduction (CSR) would be occurred for the vertical direction due to the bleeding and the aggregate sedimentation. In this paper, concrete walls with shear span ratio of 1.0 or less and the CSR were analyzed. As a result, the CSR and Qsu’ should be taken into account the seismic assessment in addition to a conventional concrete survey for especially an existing building.
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渡邊 秀和, 向井 智久, 迫田 丈志, 金子 治, 成田 修英
2018 年 24 巻 57 号 p.
673-678
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
A reinforced concrete building was damaged by the 2016 Kumamoto earthquake. Functional use of the building was not allowed after the earthquake. In this paper, post-earthquake damage evaluation and static non-linear pushover analysis were carried out for the building. In the result, superstructure of the building was classified as moderate damage, however, damage classification of the foundation was heavy due to pile head damage. Furthermore, post-earthquake functional use of the building was discussed.
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佐藤 航平, 石原 直, 鈴木 賢人, 永野 正行
2018 年 24 巻 57 号 p.
679-683
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
In this report, a direct estimation method is proposed for non-linear floor response spectrum in RC buildings with a degrading hysteretic loop based on the Takeda model. The method uses the concept of linear modal analysis with empirical coefficients and formulas characterized for the RC buildings. A shift of the resonance region, which is negligible for S buildings with bi-linear hysteresis, is also empirically evaluated for the first mode. Amplification factors of floor responses for the multi story RC buildings are verified by compared with those by nonlinear time history response analyses using number of earthquake input motions.
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馬場 祐, 田淵 敦士
2018 年 24 巻 57 号 p.
685-688
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
The mixing proportion of drywall mud tends to be decided by the experience of craftsmen in practice, and it results in the wide property variation. In this study, an experiment was carried out to clarify the influence of the water-mud ratio(W/Md) on the mechanical performance. As a result, the relationship between W/Md and the strength / rigidity showed the strong influence of the W/Md can be only observed when the proportion of sand is small. The equations were proposed to estimate the strength and the elasticity of mud drywall based on these relationships found in the result.
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西川 麻里奈, 平手 小太郎, 小﨑 美希
2018 年 24 巻 57 号 p.
689-692
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
This research discusses what effect it will make when a university (third-party position) joins to a remodeling plan of commercial facilities based on a real case. It has merit to the cooperation in enhancing check function from academic point of view which improves consistency of designs, as well as to the students in providing them with experience of actual planning and a research field. On the other hand, demerit in increasing planning time and planning without high feasibility. Overall, the third-party provided owner with a concrete evidence to pursue its purpose.
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神谷 俊行, 小谷 朋央貴, 佐野 泰之, 冨田 隆太, 平光 厚雄
2018 年 24 巻 57 号 p.
693-696
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
Sub Committee on Measurement and Analysis of Environmental Vibration is accumulating building vibrations in wood structure house. When humans sit near the vibration pickup and felt vibration, it affected the measured vibration. In this paper, we describe the change of the vibration characteristics of the building with respect to human influence near the vibration pickup.
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−測定経験者を対象としたアンケート調査から−
横島 潤紀, 冨田 隆太, 小谷 朋央貴, 伊積 康彦
2018 年 24 巻 57 号 p.
697-702
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
Sub Committee on “Measurement and Analysis of Environmental Vibrations” in AIJ, carried out two questionnaire surveys related to measurement, analysis and evaluation of environmental vibrations in buildings. One is abstraction of the important issue and another is understanding of the current status. The surveys targeted for engineers and researchers who had measured building vibrations. From the results obtained by the both surveys, this technical report indicates the issue and current status of measurement, analysis and evaluation of building vibrations. Based on the results, we organize the basic points contributing to a draft of the measurement manual.
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半澤 徹也, 鈴木 健司, 西谷 隆之
2018 年 24 巻 57 号 p.
703-708
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
A TMD system using a rotating inertial mass damper is proposed to reduce vertical vibration of structural beams and floor slabs subject to walking excitation. The developed TMD is comprised of a ball screw mechanism including flywheels and springs. This system has proved to have significant mass effects because of the ball screw mechanism, even with a small mass of the flywheel. The TMD system was applied to the connecting bridge. The authors carried out the vibration measurement of the connecting bridge and ascertained the efficacy of the newly developed TMD system.
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水谷 吉克, 近藤 靖史, 清家 剛, 小山 明男, 藤本 哲夫, 宮内 亨
2018 年 24 巻 57 号 p.
709-714
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
Thermal conductivity of ALC panels is described as 0.19 W/(m・K) in JIS A 5416_2016 which is used for a standard value for JIS certification. On the other hand, 0.17 W/(m・K) is generally used for the design value of ALC panels. In this paper, the design value is examined by measurements of actual ALC under various conditions. The results show that the value is appropriate to use to designing.
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髙田 眞人, 梅干野 晁, 浅輪 貴史
2018 年 24 巻 57 号 p.
715-719
発行日: 2018/06/20
公開日: 2018/06/20
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フリー
This study developed the coupled analysis of heat balance and airflow by combining 3D-CAD based heat balance tool, developed by authors, with CFD, for the purpose of reproducing the distribution of air flow (wind velocity, air temperature) and surface temperature, in order to evaluate the influence of complicated spatial structures upon outdoor thermal environment in urban areas. The 3D-CAD based heat balance tool could calculate detailed distribution of surface temperature in consideration of airflow distribution. In this method, the output condition of one simulation model of each in 24 hours is made as the input condition of the other model until the calculation converges with sufficient precision. The validity of simulation was evaluated with the case study on outdoor thermal environment in the high-rise and dense traditional city in desert.
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高谷 誠, 内ケ崎 万蔵, 糸長 浩司
2018 年 24 巻 57 号 p.
721-726
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
Wastewater from foods containing high-FOG is generally treated using a DAF method alone or a DAF and activated sludge method. However, these methods are often associated with problems related to operation, management, and cost. Research and development of a new, practical treatment method is needed. This study aims to develop an enzyme lipase biofilm method EBM to replace DAF, DAF + activated sludge by combining EBM for treating wastewater from high-FOG foods. We evaluated the practical implementation of the EBM by running the system on a long-term basis at a facility for treating wastewater from high-FOG foods.
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山本 高広, 住吉 大輔
2018 年 24 巻 57 号 p.
727-732
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
There are few reports about PEFC’s(Polymer Electrolyte Fuel Cell) energy saving performance in the actual house by measured data. In this paper, performance of 18 household’s PEFCs are clarified by using the HEMSs of Teriha smart town in Fukuoka Island City.
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安部 剛, 半貫 敏夫
2018 年 24 巻 57 号 p.
733-736
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
The ecological environmental technique was tried on the 2 story complex building, named “Sustainable Energy Hut” that was built lately at Syowa Station, Antarctica. Air-based solar heating system was applied on the building. The computational fluid dynamics is tried on the indoor thermal environment of the building. Good agreement was found with the field measurement of the indoor temperature and the numerical analysis.
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ー対照温室におけるトマト収量及び温熱環境との比較検討を通じてー
垂水 弘夫, 北原 慎太郎
2018 年 24 巻 57 号 p.
737-741
発行日: 2018/06/20
公開日: 2018/06/20
ジャーナル
フリー
Air temperatures in agriculture greenhouses may become too high in summer season for cultivating some plants. So we investigated the effects on tomato plant yield of a groundwater cooling system for the inhibition of temperature rise under high temperature conditions in a tomato cultivation plastic house. The tests were carried out from June to August 2016, in the site of Ishikawa Prefectural Agricultural Experiment Station. The air temperature and OT (Operative Temperature) were reduced and a remarkable cooling effect was acquired with the groundwater cooling system. However, the subject remained about saturation deficit condition.
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