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小幡 昭彦, 寺本 尚史, 髙舘 祐貴, 丁 威
2024 年 30 巻 74 号 p.
23-28
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
In previous studies, dam-break tests and computational fluid dynamics have conducted to clarify the characteristics of tsunami loads acting on the building structure with upstream obstruction. However, the Froude number in the dam-break tests are changed from time to time. It is found that the drag force acting on a structure in subcritical flow is affected by the Froude number. For simplicity, this study focuses on the drag force on building structure with upstream obstruction in subcritical flow where the Froude number is uniform.
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喜々津 仁密, 山崎 義弘, 髙舘 祐貴
2024 年 30 巻 74 号 p.
29-34
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
Uplift load tests were carried out using two types of unit test specimens that reproduced timber roof frame. From the test using the unit test specimen of the rafter joint, it was confirmed that the method based on the simple beam model in the usual design gives the same result as this result. From the test using unit test specimens that reflect the part of roof frame, the authors tried to understand the damage process progress of the entire roof frame and to calculate the strength of the roof frame, and then compared it with the wind load.
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髙舘 祐貴, 喜々津 仁密, 奥田 泰雄
2024 年 30 巻 74 号 p.
35-40
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
In recent years, strong typhoons have caused significant wind damage to low-rise buildings. The Building Research Institute installed a full-scale dynamic wind pressure loading device. This device is capable of simulating not only static or sinusoidal wind loading but also dynamic wind loading. The present paper describes the basic performance of this new device, particularly focusing on dynamic wind loading. It is expected that this device will expand the scope of testing and research for developing the wind-resistant performance of new and existing exterior materials.
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大平 陵真, 山岸 邦彰
2024 年 30 巻 74 号 p.
41-46
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
An index that indicates the intensity of seismic ground motion that is highly correlated with the maximum sliding displacement of a sliding foundation was searched. Using not only the seismic intensity, maximum acceleration and velocity, and spectral intensity that are the indices of magnitude of seismic motion but also the effective velocity and proposed index, the correlation coefficients between these indices and maximum sliding displacement of the foundation subjected to seismic motion over 6+ JMA seismic intensity observed in Japan were calculated. Consequently, the correlation coefficient was noted to be the largest for proposed index.
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西井 康真, 近藤 貴士, 向井 洋一, 鍋島 国彦
2024 年 30 巻 74 号 p.
47-52
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
In this study, the authors conducted a microtremor measurement on 15 three-story steel-frame houses and investigated their natural frequencies and damping ratios. Additionally, the authors propose a new method for estimating the natural frequencies of steel-frame houses at the newly constructed state. The proposed method is an evaluation method that does not require modeling based on structural design process, and the validity of the estimated natural frequency which was obtained using this method was verified.
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石原 直, 柏 尚稔, 喜々津 仁密, 井上 波彦
2024 年 30 巻 74 号 p.
53-58
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
This paper discusses the seismic torsional response of buildings constructed on the ground including the area where the existing piles have been removed. The eccentric ratios of horizontal stiffness of piles are confirmed by assuming some patterns of the pile arrangement and the stiffness reduction. The superstructure is modeled as a uniform shear-beam, whereas the substructure’s horizontal stiffness is modeled as sway springs with eccentricity. Based on the results of eigenvalue analysis and response spectrum analysis, it is shown that the effect of substructure’s stiffness eccentricity on story drifts of superstructure is not so significant.
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富澤 徹弥, 井上 幹太
2024 年 30 巻 74 号 p.
59-64
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
This paper analyzes the results of a subject experiment designed to evaluate anxiety about simple harmonic vibrations. We examined the correlation between biological reactions and anxiety levels when subjects experienced simple harmonic vibrations by measuring questionnaires and biological reactions and analyzing the correlation between them. The results of a subject experiment using EEG and ECG showed no correlation between EEG indices and questionnaires, but there was a correlation between ECG indices and questionnaires. We found that there is a correlation between ECG indices and anxiety levels.
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橋本 旭弘, 向井 智久, 田嶋 一之, 中村 聡宏, 有木 克良, 衣笠 秀行
2024 年 30 巻 74 号 p.
65-70
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
In recent years, research has been conducted to establish a method for quickly and appropriately determining damage to buildings during an earthquake using sensors, and it’s useful to appropriately evaluate the maximum and residual displacement during an earthquake. The purpose of this study is to propose a disaster assessment method using a satellite positioning system that directly measures the response displacement of a building from satellite positioning information. In this paper, the positioning accuracy is verified when calculating the relative displacement using two movable vibration tables that assume the top floor of a building and the ground surface under earthquake.
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真野 英之, 桐山 貴俊
2024 年 30 巻 74 号 p.
71-76
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
The end load-settlement relationship of piles with asymmetric bottom expansion was investigated by centrifugal model tests and three-dimensional FEM simulation analysis. In the centrifugal model tests, the pile end load-settlement relationship was equivalent to symmetrically expanded piles, even under conditions where the pile shaft was located at the edge of the expanded bottom. Simulation analysis also showed that the vertical stress distributions under the expanded bottom surface were equivalent for symmetrically and asymmetrically expanded piles up to the ultimate bearing capacity, and that there was no significant difference in settlement, confirming the experimental results.
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和田 湧気, 舟木 秀尊, 武田 彰文, 小谷 俊二
2024 年 30 巻 74 号 p.
77-82
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
We carried out full-scale pull-out loading tests for resistance of cast-in-place concrete belled pile. Tests were conducted with six piles using the soil type of bell enlargement and tilt angle as parameters. Then, simulation analysis of the tests was performed by FEM with a two-dimensional axisymmetric model. The results of the tests conducted in this study could be simulated to some extent by the model which considers the nonlinear characteristics of the pile and the ground. In addition, the basic tendency of the distribution of deformation and shear stress of the ground near the bell enlargement was also confirmed.
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小規模試験体を対象とした座屈実験と線形座屈解析の比較
永井 拓生, 沖 恵輔
2024 年 30 巻 74 号 p.
83-87
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
This research aimed to establish a method for calculating the compression strength of full-culm bamboo columns. We conducted buckling tests and numerical analyses using small-scale specimens of Phyllostachys edulis, Phyllostachys bambusoides, and compared them. The buckling load of full-culm bamboo columns can be estimated with sufficient accuracy through FEM linear buckling analysis, by appropriately evaluating the culm geometry and the bending Young’s modulus. However, for both species, the bending Young’s modulus is thought to be affected by factors such as cross-sectional size, moisture content, and specific gravity, suggesting a necessity to formalize the relationships between these physical properties.
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石本 蓮也, 寺井 雅和, 齊藤 正, 藤井 大地
2024 年 30 巻 74 号 p.
88-93
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
The objective of this paper is to optimise the geometry to maximise the stiffness of a single-layer lattice shell structure designed as a large-space structure with free curved surfaces, independent of geometrical formulae, and to create a form that can fully demonstrate the mechanical capabilities of the structure. Specifically, their effectiveness is demonstrated by maximising the stiffness and making the member length uniform using the traction method under the constraints on the member length.
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大木 智史, 横田 亨仁, 小澤 雄樹
2024 年 30 巻 74 号 p.
94-99
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
Kerf bending is a method of reducing bending stiffness and facilitating bending by cutting slits or other notches in rigid plane materials. This study focuses on the Kerf bending technique for unidirectional bending and proposes a shape control method for active bending arch structures generated by the movement of supported points to achieve arbitrary target shapes. The effectiveness of this method is verified through some experiments and analytical studies.
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福田 稜, 松本 慎也, 寺井 雅和, 藤井 大地
2024 年 30 巻 74 号 p.
100-105
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
The objective of this paper is to verify the effectiveness of Topology optimization for Lattice shell structures using CONLIN method. Firstly, using a basic example, we compare the stiffness with the solution obtained by ESO method and we examine their effectiveness. Next, CONLIN method is used to perform topology optimization for Partial multi-layered lattice shell structures and single-layer lattice shell structures. The stiffness of the optimized structures is compared, and the effectiveness of CONLIN method in generating lattice shell structures that are both safe and economically superior is examined.
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ALJUHMANI Ahmad Ghazi, 松本 直之, 峯岸 新, 後藤 豊, 前田 匡樹
2024 年 30 巻 74 号 p.
106-111
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
In this paper, a bolt-type steel joint system for CLT-steel hybrid buildings is proposed. The proposed connection consists of insertion steel plates and steel bolts with a large diameter that connect two CLT walls to steel beams. Evaluation methods to predict the structural performance of the connection are proposed and validated with component-level one-bolt connection tests. It was found that the methods can be used to predict the structural performance of the connection with good accuracy. The proposed connection can utilize the high strength and stiffness of CLT wall panels while maintaining an acceptable level of ductility.
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林 大吾, 林 康裕
2024 年 30 巻 74 号 p.
112-117
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
The calculation method of response and limit strength has been used to evaluate the seismic performance of traditional wooden houses in Kyoto. In this paper, firstly, we compared the characteristics of the four seismic performance diagnosis methods based on calculation method of response and limit strength. Secondly, we evaluated the seismic performance of one standard traditional wooden house in Kyoto by the four methods. Finally, we analyzed the factors that cause differences in the results, focusing on the skeleton curve, response calculation method, and ground amplification ratio.
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大木 文明, 師橋 憲貴, 平松 靖, 野田 康信, 宮武 敦, 鈴木 賢人
2024 年 30 巻 74 号 p.
118-123
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
A push-out test was conducted using specimens connecting cross laminated timber (CLT) and concrete with lag screws, inserted at an angle of 0°–60° in the direction of lag screw bearing tensile forces. The purpose of this test was to examine the effect of the insertion angle of lag screws, which are used as shear connectors in CLT–concrete composite slabs, on shear performance. The results showed that when the insertion angle was increased from 0° to 30°, the stiffness (slip modulus) increased and the yield as well as the maximum and ultimate loads tended to reach their maximum values.
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谷川 充丈, 坂田 弘安, 山崎 義弘
2024 年 30 巻 74 号 p.
124-129
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
In this paper, the bearing strength, embedment stiffness, joint strength, and joint stiffness are confirmed through experiments on load angles in the fiber direction, perpendicular to the fiber direction, and in the brace direction, and a mechanical model that takes into account load angles applicable to the joint between braces and columns is validated.
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金澤 和寿美, 宇佐美 徹, 宮内 靖昌, 五十田 博
2024 年 30 巻 74 号 p.
130-135
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
In this paper, two experiments were carried out to investigate the structural performance of the steel frame with CLT wall with damping system. In the first experiments, it was shown that sandwiching an aluminum-sprayed plate in bolt friction joints caused the slip of the joint and improved structural toughness. In the second experiments, by improving the details of the bolt joints and drift-pin joints, the initial stiffness was increased. Also, the damping effect was confirmed by comparing the energy absorption.
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中田 幸造, 金田 一男, 黒木 正幸, 松田 美紅, NOORI Mohammad Zahid
2024 年 30 巻 74 号 p.
136-141
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
A strength–ductility type seismic retrofit technique for soft first-story reinforced concrete (RC) buildings via adding wing-walls to the existing RC columns is called thick hybrid wall (THW) technique. In this technique, the additional wing-wall does not require longitudinal, transverse and anchor reinforcements; therefore, its construction is easy and cost-effective. In this study, THW technique was applied to an existing pilotis RC building in Okinawa. The objectives of this study were (1) to compare the advantages of THW and conventional retrofit techniques applied to this pilotis building, and (2) to assess the future retrofitting activities through this study.
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晉 沂雄, 太田 陸, 根岸 真子, 立花 弘
2024 年 30 巻 74 号 p.
142-147
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
Unbonded PCaPC structure has the potential advantage of being able to repair or replace damaged parts or members. Therefore, in this study, previous experiment specimens were repaired and structural performances of the specimens before and after repair were experimentally investigated. From the experiments, there was no significant difference in the structural performance between those specimens, and almost all structural capacity was restored by the repairing methods conducted in this study. The maximum strength evaluation method was also proposed based on a macro model, and the calculations showed reasonable agreement with the experiments.
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後藤 天志郎, 藤内 繁明, 小橋 知季
2024 年 30 巻 74 号 p.
148-153
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
Higher strength steel makes it possible to reduce the weight of members without changing the cross-sectional shape. To apply high-strength steel to light-gauge steel structures, it is necessary to quantify the strength of screw connections. In this study, single plane shear tests of screw connections using high-strength steel were conducted, and an evaluation formula for the strength of the connections was proposed. It was shown that the evaluation formula was able to properly evaluate the strength of the screw connections.
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鈴木 敦詞, 平賀 圭悟, 木村 祥裕, 髙橋 順一, 菊地 啓太
2024 年 30 巻 74 号 p.
154-159
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
Generally, a steel beam is assembled with a concrete slab by mechanical shear connectors. Recent efforts on the shear connectors enabled structural engineers to realize stiff and ductile connections. However, their performance is usually assessed by the standard pushout tests; thus, the superiority at the member level is relatively untouched. This research first evaluates the shear stiffness of perfobond shear connectors, which was not quantified in earlier studies. Further, the flexural stiffness of the composite beam is derived, reflecting the interlayer slip. Ultimately, the superiority of respective connectors to stud shear connectors is visualized for future applications for building structures.
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池内 邦江, 宇佐美 徹, 宮内 靖昌
2024 年 30 巻 74 号 p.
160-164
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
In this paper, the experiments were carried out to investigate the bearing strength of H-section columns with wing-plate. It was shown that the experimental values can be evaluated accurately by the previous equations. Then the specimens that a column was embedded in a pile head was used for the investigation into the friction strength and superposed strength. The effective area for friction was grasped by the experiment, and the ultimate friction stress was shown. Also, it was shown that the superposed strength of the experiment tended to be lower than the previously proposed calculated value.
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森田 高市
2024 年 30 巻 74 号 p.
165-169
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
Deep learning is applied to images and point clouds data acquired from specimen simulating ceiling sagging. For deep learning on images, AlexNet’s classification accuracy from transfer learning is 93.4%. Principal component analysis of the point clouds is used to determine the curvature of the point clouds. By setting curvature threshold for classification, correct rate is 96.5%. In deep learning for point clouds, classification accuracy by PointNet is 96.7%.
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冨田 隆太, 岡庭 拓也, 阿部 今日子
2024 年 30 巻 74 号 p.
176-180
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
In this paper, we constructed the storage furniture with tatami with an area of about 7.2m2 for the reinforced concrete building and examined floor impact sound insulation performance. As a result, when the storage furniture with tatami was installed, the sound reduction was achieved from Lr-60 to Lr-50 when the car-tire was vibrated and from Lr-55 to Lr-45 when the rubber ball was vibrated, respectively. As described above, this report clarified the feasibility of installing storage furniture with tatami in a real building to prevent heavy-weight floor impact sound.
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瀧澤 里穂, 宗方 淳
2024 年 30 巻 74 号 p.
181-186
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
This study focuses on the condition of light color, which is one of the requirements that make up the comfort of sunlight filtering through foliage, and aims to reproduce it as artificial lighting. With this purpose, we conducted four subjective evaluation experiments in experimental room as office or relaxation room. Subjects evaluated the room’s lighting environment which was composed of type of green filter, size of luminaire, ratio of green and white light and illuminance level on the desk. As a result, we found most preferred combination of those factors as well as the positive response ratio of each condition.
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細淵 勇人, 中山 哲士
2024 年 30 巻 74 号 p.
187-192
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
We measured the thermal environment of green walls in one public cultural facility with large-scale green walls. It was found that the temperature of the frame of the greening unit rise as high as almost 45 degrees and the temperature fluctuated above 40°C in the daytime. This indicates that the temperature exceeds the upper limit at which plants can grow normally. After the measurement, we experimented to confirm the possibility of avoiding poor growth of green plants by adding special specifications to the existing greening frame in order to control excessive incident solar radiation.
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高木 理恵, 後藤 伴延, 菅原 正則, 小林 光
2024 年 30 巻 74 号 p.
193-198
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
During the COVID-19 pandemic, we surveyed some classroom environments of three elementary and junior high schools in Sendai. The CO2 concentrations were maintained much lower than pre-pandemic levels by opening windows; however in two schools, they exceeded 1000 ppm for more than 50% of school hours in January. Since the installation of new ventilation fans in one of the schools, the percentage of CO2 concentrations exceeding 1000 ppm has been reduced to 8.5%. Because of the ventilation path formed through the hall and increased heating usage, the temperature in that school remained nearly constant.
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荒田 史朗, 出水 優人, 川久保 俊, 岩瀬 静雄, 花多山 隆士
2024 年 30 巻 74 号 p.
199-204
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
The study analyzes the thermal environment and energy-saving performance of nearly net-zero energy apartments in Japan during winter by measurement and questionnaire. Results show the average indoor temperatures exceeded 18°C even without air conditioning, due to superior insulation performance. Energy consumption for heating was 58.9% to 62.9% of the national average, and residents perceived their homes as warmer, leading to lower temperature settings of air-conditioner. However, there were several challenges, such as the low ratings by residents of non-heated rooms during winter.
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佐竹 良太, 辻 果歩, 野澤 文珠香, 岸本 尚子, 谷口 景一朗, 前 真之
2024 年 30 巻 74 号 p.
205-210
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
The importance of window design and window treatment operation has increased due to the growing need for energy efficiency in the residential sector. This study focuses on the impact of window design and window treatment operation on energy efficiency and the thermal, lighting, and visual environments. In this paper, after comparing the passive potential of some typical detached house models including a model on a narrow site which is increasing in city area. We demonstrate the effect of window design and window treatment operation using simulation. We also aim to present valuable information for both designers and occupants.
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横田 樹広
2024 年 30 巻 74 号 p.
211-215
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
In a greening system in which the rooftop and 4F/3F terraces are connected by water-retentive downspouts, the runoff delay effect and rainwater storage effect on each floor were observed. The effect of delaying the outflow peak was less than 1 hour throughout the period. The storage effect was high on the rooftop and 4F, reducing the storage load on the lower floors. In the model section, the total runoff reduction ratio was 8.77% to 95.50%. In particular, storage on the 4F terrace was considered to be important for reducing the outflow load of the entire greening system.
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田中 薫, 樋山 恭助, 生田 紀夫, 沢潟 裕一
2024 年 30 巻 74 号 p.
216-221
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
Open-air ducts convey conditioned air along the surface of an open duct due to the Coanda effect. In nozzle-blown air conditioning, when the heat load is large, the jet flow falls due to the temperature difference, and the flying distance is reduced. Therefore, we attempted to improve the flying distance by installing open-air ducts and studied their application to an office space as a case study using CFD analysis. In the verification experiment, it was confirmed that the installation of an open-air duct improves the thermal environment by increasing the efficiency of air distribution.
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上野 貴広, 樋口 恵佑, 高口 洋人, 木原 己人, 赤嶺 嘉彦
2024 年 30 巻 74 号 p.
222-227
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
This paper analyzes and discusses LCCO2 of temporary site offices. Based on interview surveys, a representative building model of a temporary on-site office is developed and its LCCO2 is clarified. Emissions from the operation of temporary field offices in Japan as a whole will be estimated to show how much decarbonization of temporary field offices can contribute to the reduction of domestic construction-derived CO2 emissions. Furthermore, we will evaluate the LCCO2 reductions of temporary field offices through multiple decarbonization methods, and clarify whether or not decarbonization over the entire life cycle can be achieved.
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北野 博亮
2024 年 30 巻 74 号 p.
228-233
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
In this study, I examined the electricity consumption characteristics of Mie University facilities and assessed the effects of energy-saving measures. The base electric power constituted 72% of the total, similar to other universities. I further evaluated four simple models for electricity demand forecasting. My findings indicate that the multiple regression model utilizing differenced series data achieved the lowest mean absolute percentage error. This model demonstrated stable predictions and showed excellent adaptability to changes in trends in university facility electric demand.
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大橋 巧, 森本 万葉, 西田 壮一朗
2024 年 30 巻 74 号 p.
234-238
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
CO2 emissions from building power consumption are calculated using the same CO2 emission factor throughout the year. However, with the spread of renewable energy, the actual CO2 emission factor changes from time to time, and the amount of energy consumption in buildings also fluctuates, making true evaluation difficult with conventional calculation methods. In this research, after calculating the hourly CO2 emission factor, the CO2 emissions of non-residential buildings are calculated by region and by building use. The verification revealed that the peak CO2 emissions of buildings are concentrated in the evening, not in the early afternoon.
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長谷川 兼一, 松本 真一, 竹内 仁哉
2024 年 30 巻 74 号 p.
239-244
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
The thermally renovation for built houses could contribute to global warming prevention. In this paper the analyzed results of operational and embodied carbon, LCCO2 evaluation in two detached houses before and after thermally renovation were presented. These houses had different scale of thermal insulation renovation. As a result, CO2 emissions at the renovated stage were 40% for partial renovation and 70% for whole renovation compared to the newly built stage. It was presented that 10 years for partial renovations and 20 years for whole renovations were taken before the effects of reducing LCCO2 emissions would appear.
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芹川 真緒, 吉浦 温雅
2024 年 30 巻 74 号 p.
245-250
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
A large proportion of energy consumption in Japan is attributable to houses, and the influence of household appliances is not negligible. We have surveyed actual conditions of appliance usage in recently-built houses in the Kanto region. It was confirmed that appliance usage varied widely depending on residential characteristics. In some houses, electric heaters are used every day for room heating or clothes drying. It indicates the necessity of modification of appliance usage for reducing energy consumption and CO2 emissions.
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菅野 颯馬, 小川 裕太郎, 石井 雅久, 田辺 新一
2024 年 30 巻 74 号 p.
251-256
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
Decarbonization in agriculture is needed to achieve a carbon-neutral society. This study proposed a definition of net Zero Energy Greenhouse (ZEG) and net Zero Energy Farm (ZEF). For ZEG, a labelling method based on the balance of annual energy demand and supply during operation is developed. An evaluation method of ZEF was proposed based on the balance of delivered and exported energy between the farm’s site boundary. Additionally, this study developed a calculation method for annual energy consumption and CO2 emission in a greenhouse or farm for the quantitative evaluation of ZEG and ZEF.
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菊池 嘉純, 細淵 勇人, 益尾 孝祐
2024 年 30 巻 74 号 p.
257-262
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
In recent years, there have been movements to consider traditional houses as local resources which are used for revitalizing the region. Traditional houses often do not have sufficient heat insulation performance, so it is necessary to renovate them. However, excessive renovation impairs the design of the traditional houses and loses their cultural values. In this paper, in order to verify renovation methods that secure the environmental performance while maintaining the design and cultural value, we analyze the thermal environment such as the skin heat performance and the heating load of traditional houses at Maezawa village in Fukushima prefecture.
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田住 梓, 北川 啓介, 今枝 良輔, CHEN Ye
2024 年 30 巻 74 号 p.
263-268
発行日: 2024/02/20
公開日: 2024/02/20
ジャーナル
フリー
Architectural greening has become so ubiquitous that its limitations tend to be obscured. Roofs and walls are not necessarily as suitable for planting as grounds, and they increase the structural load and drains for buildings. As opposed to the typical greening with soil, sponge, felt, this research examines the potential usage of a culture medium grown upon 3D printed resin structures. The structures maintain the water and plants, while variegating the environment and facilitating the maintenance. The research proposes such a system by evaluating the soil moisture tension for the potential usage of both 3D printed structure and soil.
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