日本建築学会構造系論文報告集

表紙

原稿種別: 表紙
1987 年 372 巻 p. Cover1-
発行日: 1987/02/28
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.372.0_Cover1

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目次

原稿種別: 表紙
1987 年 372 巻 p. Cover2-
発行日: 1987/02/28
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.372.0_Cover2

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CONTENTS

原稿種別: 目次
1987 年 372 巻 p. Toc1-
発行日: 1987/02/28
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.372.0_Toc1

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奥付

原稿種別: 付録等
1987 年 372 巻 p. App1-
発行日: 1987/02/28
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.372.0_App1

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フラクタル理論による縞パターンとその心理効果

岡島達雄, 林裕二, 小西啓之, 野田勝久

原稿種別: 本文
1987 年 372 巻 p. 1-9
発行日: 1987/02/28
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.372.0_1

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Most of the configurations of natural phenomena such as crystal of snow, outline of clouds, structure of trees have common patterns between the whole structure and the substructures. This theory built on the system of self-similarity is developed by Benoit Mandelbrot and is called to be fractal theory. This theory can explain the configurations of natural phenomena because of its origin. In the field of Computer Graphics, this theory is often be used for simulating the natural phenomena. The objects of the present study are the following ; (1) The application of the fractal theory to vertical stripe patterns, available to the design of the interior walls and the exterior ones. (2) The ascertainment of how the fractal stripe patterns make people feel natural. (3) The visual comparison of the fractal stripe patterns with stripes of which spectra are reciprocal of frequency, with an equi-spaced stripe and with random stripe patterns.

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鉄筋コンクリート部材に関する従来型曲げせん断変形分解法の力学的意味と適用限界

市之瀬敏勝, 滝口克己

原稿種別: 本文
1987 年 372 巻 p. 10-21
発行日: 1987/02/28
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.372.0_10

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Researchers engaged in structural testings often decompose the deflection of a member into flexural and shearing components. The physical meaning of this decomposition, however, has not fully been discussed yet. Moreover, there are some disagreements among researchers as to the definition of flexural and shearing deformation. This paper firstly presents a mathematial and rigorous expression for the conventional definition of flexural and shearing deformation. The shearing component of deflection is defined as the factored average of the shearing strain within the member. The flexural component of deflection is defined as the factored integration of the curvature calculated from the axial strain of the edges of the member. In case of a framed shear wall where the peripheral beams and columns carry only the axial stresses and the web concrete and shear reinforcement in the wall carry only the shear stress, the shear-flexure decomposition technique has physical meanings as follow. (a) The hysteresis loop of load vs. shearing deformation relation represents the energy absorbed within the web concrete and shear reinforcement. (b) The hysteresis loop of load vs. flexural deformation relation represents the energy absorbed by the peripheral frame. In case of a beam or a column where the longitudinal reinforcement carry only the axial stresses and the web concrete and shear reinforcement carry only the shear stress, the shear-flexure decomposition technique has physical meanings as follow. (a) The hysteresis loop of load vs. shearing deformation relation represents the energy absorbed within the web concrete and shear reinforcement. (b) The hysteresis loop of load vs. flexural deformation relation represents the energy absorbed by the longitudinal reinforcement. Stress flow in truss action resembles the stress states stated above. Therefore, the hysteresis loops of load vs. flexural and shearing components of a truss-action-dominated member tend to have such physical meanings. In case of a member where an arch action dominates, however, these loops do not have such physical meanings. In this case, even a sliding deformation along a diagonal shear crack may be partly considered as a flexural deformation.

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壁式プレキャスト鉄筋コンクリート構造の鉛直接合部の力学的挙動に関する研究 : その2 既往実験結果の考察

新藤忠徳, 末永保美, 重信恒雄

原稿種別: 本文
1987 年 372 巻 p. 22-30
発行日: 1987/02/28
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.372.0_22

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The test results in the past on Vertical Joint of Box-Frame-Type Precast Reinforced Concrete were considered by method of loading, and their data were compared with A. I. J. code. Each method of loading were characterized. At shear crack formation load, τ_<cr>/jF_c=0.1・ΣA_2/A_1 gives a rough average. But, as concerns cotter bars ratio, it had little to do with the strengths at which shear cracks were produced. And at the relation between τ_<cr> and jF_c, it is provided that allowable unit stress for shearing is 7 kg/cm^2 uniformly in "Design Criteria for Box-Frame-Type Precast Reinforced Concrete Construction". But, recently this construction method tends to progress to taller buildings. Therefore, it may be considered that the value of the allowable unit stress for shearing applies to that of "Criteria for Structual Calculations for Reinforced Concrete", below 1/30 Fc and 5+1/100 Fc. At ultimate load, τ_u/jF_c=0.15・ΣA_2/A_1 gives a rough average. And ascent of cotter bars ratio (P_s, P'_s) contributes to the increase of ultimate shearing unit stress (τ_u). At P_s>0.3 % P'_s>0.6 %, the increase of bearing strength was not recognized. Application of test results and calculated value as seen by method of loading considered as follows. Punching Type ; almost suit S Type ; test result suit about 50 % of calculated value Pure shear Type ; test result suit about 80 % of calculated value Flexure Type ; test result suit about calculated value + 10 kg/cm^2 Horizontal loading Type ; test result suit about calculated value + 10 kg/cm^2

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柱の変動軸力を考慮したRC造骨組の弾塑性解析 : その1 解析法と芯筋柱の構造実験解析

福澤栄治, 磯崎浩, 高橋元美

原稿種別: 本文
1987 年 372 巻 p. 31-44
発行日: 1987/02/28
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.372.0_31

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This paper presents the elastic-plastic analytical method of the reinforced concrete plane frame considering the fluctuation of axial forces on columns and results of application of this method to the lateral loading tests of columns with core rebars in their centers against large axial forces during earthquake. In this analytical method, two surfaces of crack and yield are introduced on the force plane of bending moment and axial force (M-N force plane) at the ends of column as the yield criteria. The yield surface is assumed as the parabolic curves approximated from M-N values at the ultimate strengths which are obtained by summation of M-N strength curves of concrete and reinforcing bars. The crack surface is assumed as the similar parabolic curves to the yield surface. Three states of elastic, crack and yield are assumed at column ends. Introducing the yield criteria, the nomality flow rule regarding to the incremental plastic strain, and the hardening rule, the elastic-plastic equilibrium equations regarding to the incremental stress-strain relationship of column are derived. From the result of application of this method to the analysis of columns with core rebars in their centers, good agreements are shown between the two load-deflection skeleton curves which are obtained from the test and the analysis. From this results it is clarified that this analytical method is adequate and effective in order to investigate the elastic-plastic behavior of the reinforced concrete plane frame under the fluctuating axial forces of columns.

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最小ポテンシャルエネルギーの原理に基礎をおく有限要素法の節点における応力の一評価法

末岡禎佑, 花井正実, 白浜敏行

原稿種別: 本文
1987 年 372 巻 p. 45-54
発行日: 1987/02/28
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.372.0_45

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In this paper a nodal stress evaluation method in a model based on approximate displacement fields is presented. This method is based on weighted residiual and finite-element approximation, so it is easy to evaluate the stresses at the nodal point. In order to demonstrate the efficiency of the method, results of several simple examples inrolving the computation of stresses at the nodal points are shown.

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鉄筋コンクリート造実大7層建物の弾塑性解析と1質点置換による仮動的実験手法 : 日米共同耐震実験研究その2

芳村学, 上ノ薗隆志, 岡本伸, 中田慎介

原稿種別: 本文
1987 年 372 巻 p. 55-64
発行日: 1987/02/28
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.372.0_55

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Collapse load analysis and dynamic response analysis were conducted to examine nonlinear behavior of the test structure. It was revealed from the analyses that 1) the structure was of completely beam-hinging type and consequently displacement profile along the structure's height was close to the first-mode displacement profile at any load level, and 2) due to the effect of higher mode vibration, the amplitude of lateral force acting on each floor level computed for the dynamic response analysis considerably exceeded the amplitude computed for the collapse load analysis, which indicated there might be great possibility that if the 'Multi-Degree-of-Freedom Pseudo-Dynamic Test' method were employed, the amplitude of lateral force might exceed the capacity of actuators. Considering the above results, it was decided to employ the 'Single-Degree-of-Freedom Pseudo-Dynamic Test' method for the earthquake response test of the structure.

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角形鋼管の局部座屈性状と幅厚比評価について

木村衛, 金子洋文

原稿種別: 本文
1987 年 372 巻 p. 65-71
発行日: 1987/02/28
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.372.0_65

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As evaluation methods of the width-to-thickness ratio of the square steel tube, there are two concepts : one is to use the total width, and the other is to use the width of the flat plate portion. This is due to the fact that although the constraint effect of the corners on local buckling is recognized, it has not been made clear how effective is the constraint. As the object of this study, short columns subjected to axial compression have been chosen, we have investigated the constraint effect of corners on local buckling and plastic deformation capacity, and the evaluation method of the width-to-thickness ratio of the square steel tube analytically. The results from the study are as follows. (1) Changes in deformation properties of a square steel tube when the radius of curvature of corners increases, resemble those in deformation properties of the box section steel tube when the width-to-thickness ratio is reduced, and the increase in the radius of curvature is recognized to have the same effect as a reduction of the width-to-thickness ratio. (2) Assuming that the width-to-thickness ratio of the box section steel tube, which has the same plastic deformation capacity as that of the square steel tube, is the equivalent width-to-thickness ratio, the width-to-thickness ratio evaluation of the flat plate portion is on the dangerous side, because the equivalent width-to-thickness ratio becomes greater than the width-to-thickness ratio of the flat plate portion. (3) For the ordinarily-used square steel tube (corner radius of curvature R≦3× plate thickness t), the constraint effect of the corners does not greatly increase plastic deformation capacity, and therefore, the width-to-thickness ratio evaluation method on the basis of the total width is appropriate.

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鉛直,水平両荷重作用下における鉄筋コンクリートフレームばりの挙動

S. M. PARVEZ MOHIT, 嶋津孝之

原稿種別: 本文
1987 年 372 巻 p. 72-85
発行日: 1987/02/28
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.372.0_72

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鋼管十字形割込みガセットプレート継手の引張耐力に関する実験的研究

五十嵐定義, 松本竹二, 辻岡静雄, 渡辺律夫

原稿種別: 本文
1987 年 372 巻 p. 86-92
発行日: 1987/02/28
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.372.0_86

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Test results on the behavior of the tubular joint with a cruciform gusset plate subjected to tension are reported. The effects of the length of the groove in the tube wall and the tube diameter-to-wall thickness ratio on the tensile strength and the deformation capacity of this joint are examined. And the recommendations for the ultimate strength design of the tubular joint with a gusset plate are given. The repair of the opening in the tube wall at the head-end of the gusset plate is also examined.

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薄層地盤モデルにおける境界積分方程式法の利用

吉田長行, 藤井大地, 藤谷義信

原稿種別: 本文
1987 年 372 巻 p. 93-102
発行日: 1987/02/28
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.372.0_93

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The boundary integral equation method involving the Green's function of the multi-layered medium by the thin layer method is very useful to evaluate the foundamental physical quantities in the dynamic soil-foundation interaction problem. However, there exist two complexities in evaluating these quantities by this method ; 1) the calculation of the stress components of the Green's functions introduces substantial errors near the applied point, 2) the solution of the dynamic stiffness analysis is disturbed in wide range near the natural frequency of the fundation (the internal resonance). In spite of the complexity 1), both of the imaginary part of the impedance and static impedance are rather exactly calculated by the indirect integral formulation. So, the real part can be indirectly obtained from them by the Hilbert transform, and also it can be directly calculated by modifying the solutions of the stress from the condition that the internal stress might be real value. The complexity 2) is resolved by putting the internal constraint surface in the foundation to take away the internal resonance point from the frequency range of interest. In order to verify the accuracy of the proposed method, this paper presents the torsional impedance analysis of axi-symmetric foundation by use of the ring-line-load solutions in a thin layered soil.

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使用荷重下における鉄筋コンクリート床スラブたわみの予測計算

杉野目章, 井野智, 土橋由造, 山村明義

原稿種別: 本文
1987 年 372 巻 p. 103-113
発行日: 1987/02/28
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.372.0_103

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In this report, accepted equations for the respective estimation of the known, causally different types of deflection for r. c. beams and one-way slabs are incorporated into the authors' deflection calculation system for two-way floor structures, so as, with it thereby modified, to be of extended and generalized use for these. First in the subsequent efforts the observed longtime proceeding of the deflection of hitherto tested slab models under sustained service loading and some field floor slabs with deflection damages is set against its follow-up prediction by the current modified procedure, as well as its equivalent estimations by the ACI-and CEB-methods as comparative others from building codes. Also, in consideration of the effect of constructional inaccuracies involved in actual specific instances the relative adequacy of the presented procedure is further examinedjwhen, using this again, measured deflections of several pertinently damaged slab examples are reviewed and generally affirmative results are obtained.

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「一様外圧を受ける周辺固定部分球形シェルの座屈挙動に関する一考察非偏平部分球形シェルを含む」についての質疑(鈴木敏郎・元結正次郎共著, 日本建築学会構造系論文報告集, 第361号, 昭和61年3月掲載)

角野晃二

原稿種別: 本文
1987 年 372 巻 p. 114-
発行日: 1987/02/28
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.372.0_114

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角野晃二先生への回答

鈴木敏郎, 元結正次郎

原稿種別: 本文
1987 年 372 巻 p. 115-
発行日: 1987/02/28
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.372.0_115

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SI単位の換算率表

原稿種別: 付録等
1987 年 372 巻 p. App2-
発行日: 1987/02/28
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.372.0_App2

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裏表紙

原稿種別: 表紙
1987 年 372 巻 p. Cover3-
発行日: 1987/02/28
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.372.0_Cover3

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