日本建築学会構造系論文報告集

表紙

原稿種別: 表紙
1986 年 369 巻 p. Cover1-
発行日: 1986/11/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.369.0_Cover1

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目次

原稿種別: 表紙
1986 年 369 巻 p. Cover2-
発行日: 1986/11/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.369.0_Cover2

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CONTENTS

原稿種別: 目次
1986 年 369 巻 p. Toc1-
発行日: 1986/11/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.369.0_Toc1

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<内容区分と表示について>

原稿種別: 付録等
1986 年 369 巻 p. App1-
発行日: 1986/11/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.369.0_App1

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奥付

原稿種別: 付録等
1986 年 369 巻 p. App2-
発行日: 1986/11/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.369.0_App2

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屋外スポーツサーフェイスのかたさ測定装置の設計・試作 : 屋外スポーツサーフェイスのかたさの評価方法に関する研究(第1報)

小野英哲, 三上貴正

原稿種別: 本文
1986 年 369 巻 p. 1-8
発行日: 1986/11/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.369.0_1

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The purpose of this study is to present the evaluating method on hardness of outdoor sports surfaces from the viewpoint of players' safety and comfort. The outline of present paper, Part 1, is as follows. At first, the sensation scale of hardness is composed on the experimentally set up samples of outdoor sports surfaces by means of sensory test, which will indicate the appropriate order of hardness of samples. Secondly, 'Hardness Tester of Outdoor Sports Surfaces' is newly designed and manufactured, which can measure the dynamic response of surfaces under the mechanical load approximating to players' actual load in exercise. And data of dynamic deformation and load of the samples are measured by the new hardness tester. Finally, after considering the relation between dynamic data of samples and sensation scale of hardness, pertinent physical value which well correspond to sensation scale is found out.

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木目の図形的分析と木目パターン

岡島達雄, 若山滋, 野田勝久, 小西啓之

原稿種別: 本文
1986 年 369 巻 p. 9-15
発行日: 1986/11/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.369.0_9

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In a woody space, we feel at ease and calm. On visual effect, patterns of the grain of wood is often used to interior walls, ceilings and so on. The objects of this study are the following ; (1) Considering of the grain of wood as geometrical stripe patterns and making clear its visual characteristics. (2) Generating a system of stripe patterns of the grain of wood, that are able to vary continuously with every change of parameters.

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コンクリート中におけるアルカリ・シリカ反応に関する基礎的研究 : 第1報サヌキトイドのアルカリ・シリカ反応性

岸谷孝一, 尹在煥

原稿種別: 本文
1986 年 369 巻 p. 16-22
発行日: 1986/11/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.369.0_16

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This paper is concerned with the reaction between the alkalis present in the pore fluids of the cementitious phase of concrete and glassy orthopyroxene andesite occuring in the Setouchi volcanic rocks in Japan. Geological and petrogical characteristics of the Sanukitoid are investigated. Alkali-silica reactivity of Sanukitoid is tested by ASTM method and cement alkali content which shows deleterious expansion by ASTM mortar bar method is obtained. Formula which can predict the pessimum content of reactive aggregate for given mortar mix proportions with certain alkali content is presented by the function of critical alkali silica ratio. Alkali content which does not show deleterious expansion in mortar and concrete is obtained experimentally.

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弦材に角形鋼管を用いたトラス柱の曲げねじれ座屈に関する実験的研究

松井千秋, 森野捷輔, 河野昭彦

原稿種別: 本文
1986 年 369 巻 p. 23-30
発行日: 1986/11/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.369.0_23

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Rigidly-jointed truss beam-columns which are composed of rectangular tube chords have the high strength of the lateral-torsional buckling, and can be more easily fabricated than trusses composed of circular tube chords. However, the web members may cause local deformations in the flat plate elements of rectangular tube chords around the connections, which might reduce the buckling strength. Therefore, the economical and safe design requires the accurate evaluation of the buckling strength, taking both advantageous and disadvantageous effect mentioned above into consideration. In the case of trusses with circular tube chords, experimental and theoretical work have been carried out by many researchers. On the other hand, there are few experimental researches on the trusses with rectangular tube chords. From this point of view, an experimental and theoretical investigation on the truss beam-columns which chords are rectangular tubes and web members rectangular or circular tubes have been carried out. The paper presents that the buckling strength of the truss beam-columns increase due to the restraining effect of web members and a tensile chord, and discusses that the reduction of the buckling strength due to the effect of local deformation around the connections cannot be disregarded in the design.

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偏った剛性分布をもつ構造物のねじれ応答

山崎裕

原稿種別: 本文
1986 年 369 巻 p. 31-41
発行日: 1986/11/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.369.0_31

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In this paper, lateral torsional response characteristics of single-story one-way and two-way torsionally coupled systems and also multi-story torsionally coupled systems when subjected to ground motions are investigated based on a random vibration approach. The principal conclusions are summarized as follows : 1) The two variables, those are eccentricity e_y/γ and frequency ratio ζ_<xθ>, are most closely related to torsional response of structures subjected to ground motions. 2) A dynamic torsional amplification factor A_d, which is defined by A_d=dynamic torsional displacement/static torsional displacement, gives a predominant peak at ζ_<xθ>&nap;1 on an A_d-ζ_<xθ> plane. In this case, the smaller the value of e_y/γ, the sharper the peak. The maximum value of the factor A_d is experimentally given by Eq. 43. 3) The eccentricity factor R_<ex> defined in the Building Standard Law is approximatey equal to an eccentricity constant θ_x which is defined as a product of two variables e_y/γ and ζ_<xθ>, if the value of R_<ex> is not greater than 0.6. 4) Response of a two-way torsionally coupled system which has the frequency ratio ζ_<xθ> less than 1 〜 1.5 can be estimated from the one of a one-way torsionally coupled system. 5) Torsional displacement ru_θ/u_x at the story with eccentricity of a multi-story system approximately coincides with the one for a corresponding single-story system if ζ_<xθ>≦1, and generally gives smaller values compared with the single-story one in case of ζ_<xθ>>1. 6) Torsional displacement at the story without eccentricity of a multi-story system is negligibly small in case of ζ_<xθ>≦O.5. However, it rapidly becomes larger with larger value of ζ_<xθ>, and, is expected in some case to be larger than the one which is produced at the story with eccentricity.

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マルコフスペクトルをもつ地動による履歴1自由度系のランダム応答

松島豊

原稿種別: 本文
1986 年 369 巻 p. 42-47
発行日: 1986/11/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.369.0_42

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This paper deals with the nonlinear random response of single-degree-of-freedom systems with slip-type hysteretic restoring force characteristics, when subjected to ground motions which have the Markoffian spectra. The attention is focussed on the time change of the expected equivalent natural frequency ratio β and of the expected cumulative plastic deformation ratio λ. The approximate solutions for β and λ are derived on the basis of the theoretical investigation. They are explicitly represented in terms of two parameters - the ratio of natural frequency in the elastic range to the half-power point of Markoffian spectrum υ and the product of the nondimensional input intensity ξ and the nondimensional time τ. Both β-ξτ and λ-ξτ relations with the parameter υ reasonably reflect the nonlinearity of the hysteretic system and the property of Markoffian spectrum where the spectral density increases as the frequency decreases. In the inelastic case the value of spectral density at the initial natural frequency plays a less important role than in the elastic case. The approximate solutions are compared with the digital estimates obtained from the Monte Carlo simulation. The agreements between the both are satisfactory over the wide ranges of related parameters.

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パルス応答解析による1質点系の地震応答評価 : Bi-linear型復元力特性:完全弾塑性型と塑性劣化型について

山田稔, 河村広, 谷明勲, 藤谷秀雄

原稿種別: 本文
1986 年 369 巻 p. 48-59
発行日: 1986/11/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.369.0_48

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The authors have presented Ultimate Response Analysis by which one can evaluate earthquake responses and seismic damages according to the principle of the ultimate energy equilibrium. In this analysis, the response behaviours of structures are classified into the two typical cases, i.e., cyclic responses and monotonic responses. The former is calculated by Finite Resonance Response Analysis and the latter by Pulse Response Analysis (velocity and acceleration pulses). In this report, the physical meanings of Pulse Response Analysis are examined essentially and it is proposed here a more accurate seismic analytical method, i.e., Ultimate Response Analysis in which the following are taken into account : (1) An equivalent amplitude ratio of input sine pulse wave to input rectangular pulse wave, (2) An equivalent amplification ratio of the duration of input rectangular pulse wave (t_P) to the period of in put spectrum (T), (3) The rule by which velocity or acceleration pulse is adopted in Pulse Response Analysis, (4) An initial velocity (V_0) by Finite Resonance Response Analysis The quantitative verification of the results of analysis are performed by means of statistical evaluations of earthquake inputs and responses. From this study, it is able to be concluded that Ultimate Response Analysis proposed here has a sufficient practical use.

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水平せん断力を受ける塔状型円筒シェルの破壊実験

崔鉉植, 田波徹行, 半谷裕彦

原稿種別: 本文
1986 年 369 巻 p. 60-69
発行日: 1986/11/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.369.0_60

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Failure of cylindrical tanks subjected to earthquake excitations are often caused whether by buckling such as shear buckling and local buckling or by elephant-foot bulging, which appears at the lower part of the shells. And it is of practical importance in the design of these tanks to evaluate the ultimate resistant capacity by examining these failures in detail. The purpose of this paper is to examine the influence of height-to-radius ratio and the material properties upon the failure mechanisms. To this end, ten models made of aluminium and mild steel with common dimensions of radius : 150 mm and thickness : 1 mm, as well as the variable dimension of height : 712 mm, 575 mm, 420 mm and 275 mm, respectively, are tested under static transverse shear loads. From this tests, elephant-foot bulging and plastic shear buckling were observed corresponding to the heighti-to-radius ratio, and the results show about 30 % of the classical buckling stress of cylindrical shells due to the axial uniform load. The details are presented in the paper "Failure Tests of Cylindrical Shells under the Transverse Load" proceedings of IASS symposium (Osaka, Japan), Elsevier, 1986.

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高速載荷時の鋼構造接合部の力学的挙動に関する実験的研究 : その2 めっき処理を施した鋼素材,突合わせ溶接接合,中ボルトせん断型接合部の載荷実験

金多潔, 甲津功夫, 藤村和男, 篠原祥, 木上貴夫

原稿種別: 本文
1986 年 369 巻 p. 70-78
発行日: 1986/11/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.369.0_70

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When tower-shaped steel structures are subjected to earthquakes, fluctuating velocity winds and other external disturbances, it can be assumed that mechanical properties of the material will vary from those of the material under static conditions due to the influence of loading speed (effect of strain rate velocity). In this respect, the studies in the post deal with (the raw material itself and it has not been clarified whether or not experimental results are also applicable to the dynamic behavior of connections which seem to be the most critical part in the steel structural frame. Such being the case, the purpose of this study is to clarify from an experiment of high speed monotonic tensile loading, the characteristics of the change in mechanical properties of the galvanized base metal, the galvanized butt-welded joints and the joints through shear strength of galvanized regular bolts, used in the ordinary towershaped steel structures. From these tests results, it has been concluded that, since the mechanical properties of these structural joints are remarkably affected by strain rate effect, the strength of the joints may not be directly estimated from the mechanical properties of the base metal itself.

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ボルト接合における応力伝達について : 集中荷重をうける木材の応力の直交異方性体としての弾性論的研究(その2)

松井源吾, 西谷章

原稿種別: 本文
1986 年 369 巻 p. 79-86
発行日: 1986/11/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.369.0_79

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The previous paper has analyzed how a concentrated force is transmitted into a orthotropic wood plate for the case shown in Fig. 3. This paper deals with those cases in which the stresses are transmitted from a bolt to a orthotropic wood plate. Since the diameter of a bolt-hole is usually made 1 mm bigger than that of a bolt itself, a external compressive force, for instance, is mainly transmitted to the region between the upper and lower bolts (Fig. 4 (a)). Hence in this case the stress distributions through wood are explained by the orthotropic model of elasticity depicted in Fig. 3 without taking any account of existence of the regions from the bolts to the free ends. By pouring some epoxy into a bolt joint, the bolt is expected to be free of excess play such that external forces can be transmitted through the whole region of wood. Actually it is recognized that epoxy-glued bolt joints improve satisfactorily in the sense of final strength as well as displacement (Fig. 2). For epoxy-glued bolt joints the stresses are provided by making some alternation to the original results which were proposed in the previous report. Validity of the theoretical solutions of stresses for both normal and epoxy-glued bolt joints is assured by comparing the experimental results.

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正弦加力を受ける基礎の浮上りと地下逸散減衰の関係について : 半無限弾性地盤上の基礎の浮上りを伴う動的挙動に関する研究その1

下村幸男, 田治見宏

原稿種別: 本文
1986 年 369 巻 p. 87-101
発行日: 1986/11/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.369.0_87

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The purpose of this analytical study is to predict nonlinear soil-structure interaction induced by a base mat uplift subjected to large seismic inputs. In this paper, a modified procedure of the Time-Lagged Influence Coefficient Method, that was named for a numerical method based on the Green's function and the Duhamel's integral, has been employed. The uplift motions of a base mat subjected to sinusoidal excitation have been computed by this procedure. On the basis of computational results, nonlinear subgrade reactions have been estimated in order to be applied to practical approximate calculations by following two ways. One has afforded effective values of spring constant and viscous damping, which are dependent on the frequency and are applicable to obtain the frequency response of a base mat in uplift. The other has afforded a model composed of spring and dashpot as functions of varying contact area. The results obtained here could be summarized as follows. (1) Effective Values of Spring Constant and Viscous Damping The spring constant has been evaluated from equation (63). The damping factor has been considered to be proportional to frequency, and it can be assumed to be unvarying with uplift. Using the equivalent linearization method here, these effective values are applicable in a case of small uplift. (2) Spring-Dashpot Model The spring constant has been regarded as secant static modulus ^s_θ in Table 1, and the damping coefficient C_θ has been evaluated from equation (61). This model is applicable to approximate computations of a base mat response in the time domain, even if uplift is comparatively large.

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SI単位の換算率表

原稿種別: 付録等
1986 年 369 巻 p. App3-
発行日: 1986/11/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.369.0_App3

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裏表紙

原稿種別: 表紙
1986 年 369 巻 p. Cover3-
発行日: 1986/11/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.369.0_Cover3

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