日本建築学会論文報告集

表紙

原稿種別: 表紙
1975 年 233 巻 p. Cover1-
発行日: 1975/07/30
公開日: 2017/08/22

DOIhttps://doi.org/10.3130/aijsaxx.233.0_Cover1

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目次

原稿種別: 表紙
1975 年 233 巻 p. Cover2-
発行日: 1975/07/30
公開日: 2017/08/22

DOIhttps://doi.org/10.3130/aijsaxx.233.0_Cover2

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CONTENTS

原稿種別: 目次
1975 年 233 巻 p. Toc1-
発行日: 1975/07/30
公開日: 2017/08/22

DOIhttps://doi.org/10.3130/aijsaxx.233.0_Toc1

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奥付

原稿種別: 付録等
1975 年 233 巻 p. App1-
発行日: 1975/07/30
公開日: 2017/08/22

DOIhttps://doi.org/10.3130/aijsaxx.233.0_App1

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合成高分子防水層の耐候性 (その 2) : 屋外暴露試験; 材料自体の伸長暴露と防水層の暴露

田中享二, 小池迪夫

原稿種別: 本文
1975 年 233 巻 p. 1-12
発行日: 1975/07/30
公開日: 2017/08/22

DOIhttps://doi.org/10.3130/aijsaxx.233.0_1

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The roofing membranes are often exposed outdoors under the condition of being stretched when they are applied on roof decks of less rigidity, for instance, the decks which are constructed with prefabricated roof panels, or which easily crack. It is said that these materials are deteriorated by weathering especially in case of being stretched. Therefore, it is important to make clear the weatherability of these materials under the condition of being stretched. The test were carried out from two different standpoints, one was wetherability of the materials themselves, and the other concearned the roof systems composed of them. Dumbbell specimens of the materials were exposed in Tokyo and Sapporo under tension, and specimens of roof systems were also exposed in both exposure sites, under the condition that joints in substrates of the roof systems were opened or sheared. The results obtained may be summarised as follows. Generally speaking, the lower the strain, the shorter the cracking and breaking times and the effect of outdoor exposure is severer in Tokyo than Sapporo. The same tendency can be seen in specimens of roof systems, the wider the joints, the shorter the cracking and breaking times in the same roof systems. Cracking has not been detected in some membrane which was flexibly bonded on substrate, though considerable cracking was detected in the same membrane rigidly bonded and in the streched dumbbells.

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実験値に基く条件付き最小値の推定法に関する基礎的研究

馬場俊介, 中川建治, 成岡昌夫

原稿種別: 本文
1975 年 233 巻 p. 13-20
発行日: 1975/07/30
公開日: 2017/08/22

DOIhttps://doi.org/10.3130/aijsaxx.233.0_13

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The estimating method of the possible lower limit, that is, the irreducible minimum of the strength of material is proposed herein on the basis of scores of data given by the strength tests. In general, for these data, a specified distribution is assumed based on the test of hypothesis of the distribution. The normal distribution is mostly choosen for the specified distribution, and in this case, thrice of the standard deviations becomes the lower limit of the strength. However, the assumption of the distribution may not be desirable, since the test of hypothesis of the distribution does secure nothing. Therefore, the distribution for the population of the strength is determined based on the problem of variation so as to minimize the lower limit and so as to satisfy several conditions extracted adequately from the test data. These conditions are mean, variance, minimum, maximum, mean of the lower S data, mean of the upper T data, etc.. Calculations of the distribution are made for various combinations of these condition, and numbers of conditions increase from only two to eight. Between two and eight conditions, seven conditions are selected for practical use. This technique is applied to the data given by the test of the steel buckling strength, steel tensile strength and cement-mortar bending strength. And, the propriety of this technique is interpreted in detail. Further, a simple estimating method which needs no calcluation is proposed in order to increase its applicability.

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コンクリートの破壊挙動に及ぼす粗骨材の影響 : 第 3 報特異点応力度による検討

小阪義夫, 谷川恭雄

原稿種別: 本文
1975 年 233 巻 p. 21-32
発行日: 1975/07/30
公開日: 2017/08/22

DOIhttps://doi.org/10.3130/aijsaxx.233.0_21

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The purpose of this study is to examine the effect of coarse aggregate on fracture process of concrete. River graval, artificial lightweight aggregates, crushed limestone, sandstone and andesite, steel and glass balls were used for coarse aggregates. The variables of experiment were as follows : type, size and volume fraction of aggregate, and water-cement ratio of cement paste or mortar matrix. The following conclusions were obtained by this experimental study. 1) The stress at the proportional limit (σ_p) of stress-strain curve, the initiation stress (σ_<in>) and the critical stress (σ_<cr>) of concrete are affected by the compressive strength (F_<cc>) of concrete, the volume fractions of coarse aggregate in concrete (V_<ca>/V_<cc>), fine aggregate in mortar (V_<sa>/V_m) and cement in cement paste (V_c/V_<cp>), and the type of coarse aggregate. 2) The values of σ_p/F_<cc>, and σ_<cr>/F_<cc> for normal concrete and artificial lighweight aggregate concrete can be estimated by Eqs. (23)〜(25) and Eqs. (26)〜(28), respectively. Eqs. (23)〜(28) are applicable to calculate the values of σ_p, σ_<in> and σ_<cr> of mortar or cement paste by substituting zero for the values of V_<ca>/V_<cc> or V_<ca>/V_<cc> and V_<sa>/V_m, respectively. 3) The values of σ_p/F_<cc>, σ_<in>/F_<cc> and σ_<cr>/F_<cc> of concrete increase with the decrease of the modular ratio of coarse aggregate to mortar matrix, and the size (φ_a) of coarse aggregate.

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木質系開口壁パネルのせん断耐力に関する研究 : 第 1 報合板を表面材に用いた開口パネルのせん断耐力推定式の提案

林勝朗

原稿種別: 本文
1975 年 233 巻 p. 33-38
発行日: 1975/07/30
公開日: 2017/08/22

DOIhttps://doi.org/10.3130/aijsaxx.233.0_33

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It is necessary to know the performance of wooden wall panels with opening in order to estimate the real shear strength of prefabricated wooden structures from results of unit-panel racking tests. However, a great deal of labour will be required to assume the shear strength of panels with various openings based on experiment alone. In the first place I propose below three theoretical formulae to estimate the shear strength of them followed by a description of their characteristics. The formulae are as follows; (i) Window type and horizontal slit type opening panels [numerical formula]…(I) (ii) Door type and vertical slit type opening panels (with spandrel-wall) [numerical formula]…(II) (iii) Vertical slit type opening panels (without spandrel-wall) [numerical formula]…(III) The above-mentioned formulae are proposed on the assumption that the whole panel undergoes a pure-shear deformation in case of (i) and (ii), and that the wing-walls undergo a rotatory deformation in case of (iii).

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枠組壁工法を用いた耐力壁のせん断性状に及ぼす試験方法・シージング材・釘打ちの影響に関する実験的研究 : 第 2 報耐力壁脚部の回転の影響を除いた場合の考察 : 木質構造の新しい設計体系確立のための提案と考察 (第 12 報)

杉山英男, 鈴木秀三

原稿種別: 本文
1975 年 233 巻 p. 39-50
発行日: 1975/07/30
公開日: 2017/08/22

DOIhttps://doi.org/10.3130/aijsaxx.233.0_39

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基礎ぐいの水平方向復元力特性に関する 2, 3 の考察

望月利男

原稿種別: 本文
1975 年 233 巻 p. 51-60
発行日: 1975/07/30
公開日: 2017/08/22

DOIhttps://doi.org/10.3130/aijsaxx.233.0_51

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This paper describes the hysteretic force-deflction relation for a pile foundation. It is assumed that the pile is a one degree-of-freedom systen in this investigation. The summary of thispaper following. (1) In the case that the F-y relation (force-deflection) of pile shows one straight line on a log-log paper, that is, it is represented by equation (3), the resonant frequency is obtained by equation (16). And the equiralent viscous damping constant for the equation (3) and (4) is determinad by equation (9). (2) In the case that the F-y relation (skelton curve) of pile shows two dog-leg straight line on a log-log paper, this relation is approximately represented by equation (18) and Fig. 5 (b). (3) It is recegnized that the α-value of F-y relation has changed in the result of lateral loading test for soil at various depth of loam layer. And the value of near the ground surface is lower than that of deep position (Fig. 6 (a), (d)). (4) In the above mentioned layer, snd after yielding, the α-value of RC pile whose head is free is nearly equal to the value of near the ground surface soil. But, there is no difference in the initial value of α between the two (Fig. 6 (d)). (5) The hysteretic curve for equation (18) of skelton curve is approximately shown by equation (19) and Fig. 4 (b). (6) The equivalent viscous damping constant for equation (18) and (19) is determined by equation (20). (7) Steady state sesponse curves of the one degree-of-freedom system whose hysters is loop is described by Eq. (19) is obtained by Eq. (24).

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塑性率制御法 : 梁降伏型架構についてその 2

石丸辰治

原稿種別: 本文
1975 年 233 巻 p. 61-70
発行日: 1975/07/30
公開日: 2017/08/22

DOIhttps://doi.org/10.3130/aijsaxx.233.0_61

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ガウス曲率とシェルの座屈・IV : 曲げを伴う殻の座屈 (3) (非線型問題・2)

坪井善勝

原稿種別: 本文
1975 年 233 巻 p. 71-81
発行日: 1975/07/30
公開日: 2017/08/22

DOIhttps://doi.org/10.3130/aijsaxx.233.0_71

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鉄筋コンクリート柱の力学的挙動に関する研究 : (その 1) 実験概要, 曲げ変形, 鉄筋およびコンクリートの歪について

野口博

原稿種別: 本文
1975 年 233 巻 p. 83-93
発行日: 1975/07/30
公開日: 2017/08/22

DOIhttps://doi.org/10.3130/aijsaxx.233.0_83

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The purpose of this study is to elucidate how each factor takes part in the strength and ductility of reinforced concrete columns. For this purpose columns subjected to bending moment, shearing force and axial force were tested with emphasis on deflection, strain and bond slip measurements. From the test results the effect of material behavior of a column member was studied (Part 1, 2) and further investigation is made by comparing test results with the results of the analysis using some of the test results. Two identical specimens are tested with emphasis on the monotonous load on No.1 and the cyclic loads on No.2. Measurements were as follows, 1. Deflections by displacement meters and dial gauges 2. Strain of reinforcing bars and concrete by wire strain gauges 3. Average strain of concrete by contact gauge 4. Bond slip measured directly by contact gauge and calculated from strain. 5. Observation of cracks Load-deflection relationships, curvature distributin diagrams, flexural deflections and load-strain relationships are shown and discussed in comparison with the results of the analysis.

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軸圧をうけるコンクリート充填鋼管柱の弾塑性曲げ変形性状に関する研究 : I 一方向曲げ-実験並に解析

山田稔, 坂恵一己, 近藤一雄

原稿種別: 本文
1975 年 233 巻 p. 95-100
発行日: 1975/07/30
公開日: 2017/08/22

DOIhttps://doi.org/10.3130/aijsaxx.233.0_95

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Flexural deformation behavior of concrete filled steel tube beam-columns is discussed in elasto-plastic range. As the fundamentals of deformation analysis, the bending moment-curvature relationships of concrete filled steel tube beam-columns are derived analytically such as (12), (14), (16), (20) and (23) under the assumptions of the simplified mechanical properties of materials, i. e. perfectly elastic-plastic for concrete and bi-linear elastic-plastic with a gradient of μ_<stb.> E_s in plastic range for steel such as shown in Figs. 1 and 2. In these analytical expressions, it is indicated that the product of the strength ratios between concrete and steel β_s(=σ_y/F_c) and the thickness ratios of steel tube t_1(=t/r) is the main parameter. The influences of axial load level ratios N/N_y and the values of gradient μ_<stb.> upon the m-φ relationships are shown in Fig. 4 for a case of β_s・t_1=1.00. The load-deflection relationships are calculated on the bases of these moment-curvature relationships and the influences of axial load level ratios and bilinear plastic gradients upon them are shown in Fig. 6 for a case of β_s・t_1=1.00, too. Tests are carried out by a loading system such as shown in Fig. 5 on the specimens with a diameter of 139.8mm and a wall thickness of 4.5mm steel tube with a yield stress of 3800kg/cm^2 and concrete of a mean cylinder strength of 300kg/cm^2. The load-deflection relationships under various axial load level ratios of 2/3, 1/2, 1/3 and 1/6 are shown in Fig. 7 with solid lines and compared with computed values shown by dotted lines. Fig. 8 shows the tested values under constant axialload level ratio of 1/3 by solid lines and computed values are indicated by dotted lines for μ_<stb.>=0, 0.01, 0.02. The coincidence between tested (solid) and computed (dotted) values in Figs. 7 and 8 is very well, therefore, the analysis proposed here is reasonable enough.

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壁を含む架構のせん断流れによる解法について (その 1)

佐藤立美

原稿種別: 本文
1975 年 233 巻 p. 101-108
発行日: 1975/07/30
公開日: 2017/08/22

DOIhttps://doi.org/10.3130/aijsaxx.233.0_101

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This paper presents a method for analysing the flame with seismetic wall under the lateral force. In this paper, the shearing rigidity of a flame without wall is substituted for a thin wall equaled to its rigidity and the bending rigidity of a seismetic wall is substituted to areas of either sides of wall, then the flame under consideration is substituted for a plane field with verious thickness and various area of stringers. The shear flow equation is introduced by the continuous condition deduced by the strain energy of the flame and by the equilibrium of the shear flow in the total field under consideration. Shear flow of each fields and deflections of each stories are solved by this equation, and from them, shear forces subjected to each member are calculated. Furthermore, bi-linear solution can be dirived by making a partial revision of the shear flow equation. This method has been compared with photoelastic experiment and another methods for a few example, and good agreement has been obtained. In this method, arbitary flame with seismetic wall such as rundum variation of story-height, and rundum thickness of wall, and rundum arrengement of seismetic wall can be solved, and every time, appropriate distribution of shear stress of the flame is expected, and its solution is put to practical use.

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1974年伊豆半島沖地震調査報告 (その 1) : 地震時の出火危険とその要因について

堀内三郎, 水野弘之, 関沢愛, 森下弥三郎

原稿種別: 本文
1975 年 233 巻 p. 109-119
発行日: 1975/07/30
公開日: 2017/08/22

DOIhttps://doi.org/10.3130/aijsaxx.233.0_109

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Large Damages were caused by this earthquake on May 9th, in 1974 at 8.33 a.m. At each district of Minami-Izu cho, there happened many leakages caused by the overturning of L.P. Gas containers or destructions of gas pipes. We distributed the schedules to every houshold and surveyed the intensity of the earthquake motion, leakages of L.P. Gas et cetra as the factors of outbreake of fires. As these results, the relationship between the outbreak of fires and its factors were obtained. The Contents are as follows; 1. Introduction 2. Survey by questionnaire method 3. Comparison the fires caused by this earthquake with the fire in the former cases. 4. The relationship between the intensity of the earthquake motion and the factors of outbreake of fires. 5. L.P. Gas leakages. 6. The factors of outbreake of fires and their dangerous properties. 7. Summary.

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建物周辺に発生する強風ならびに防風垣による強風の遮蔽に関する風洞実験 : その 1. 単独模型の場合建物周辺気流に関する実験的研究 (VII)

勝田高司, 村上周三, 池田耕一, 上原清

原稿種別: 本文
1975 年 233 巻 p. 121-132
発行日: 1975/07/30
公開日: 2017/08/22

DOIhttps://doi.org/10.3130/aijsaxx.233.0_121

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In recent few years, it has become well know that a stong wind blows around a high rise building. Now it is an important problem, for designers, users of the building and inhabitants near the building, how to estimate the speed and the area of the strong wind around a building and how to protect pedestrians and shops from strong wind. In this report, it is investigate how strong wind occurs around a single exposed building and how it can be sheltered by windbreaks, using the wind tunnel technique. At first, the high wind speed and the strong wind area measured with several types of model, e.g. the block-shaped model, the block-shaped model with pilots and the block-shaped model with setback, Next it is investigated how the sheltering effect changes according to position, height, length or open-space ratio of the windbreak.

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室内の微生物汚染に関する研究 (その 1)

菅原文子, 吉沢晋

原稿種別: 本文
1975 年 233 巻 p. 133-141
発行日: 1975/07/30
公開日: 2017/08/22

DOIhttps://doi.org/10.3130/aijsaxx.233.0_133

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We have been working on the problem of microbiological contamination of intra-mural air due to various sources. Some results of measurements, recently made in offices, underground shopping centers and dwellings, on airborne bacteria and fungi as particulate matter in reference to concentration, dissemination and other characteristics important from the stand point of engineering control, are reported. Settling plates and the Pinhole Samplers were used for sampling airborne microbes and the Andersen Samplers for sampling in various sizes. From the results, concentration variations, size distributions, average sizes in each sampling point were determined. The medians and standard deviations were also determined. Some results such as that medians of bacteria are larger than those of fungi showed the difference of state of particles of these two kind of microbes. Correlation of concentration and number of passers-by, decrease of number of microbes which disseminated into air and other results were also reported.

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防災計画の定量化 : 「マルコフ過程によるグルーピング手法」の応用

川村武雄

原稿種別: 本文
1975 年 233 巻 p. 143-150
発行日: 1975/07/30
公開日: 2017/08/22

DOIhttps://doi.org/10.3130/aijsaxx.233.0_143

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By the computer analysis using the intimacy degree calculation, absorption Markov Chain and Ergodic Markov Chain of stochastic theory it makes grouping how the many fundamental items concerned with the prevention of disaster plan which cut into the smallest pieces function with what sort of connection against every disasters imaginable mutually. Then organized hierarchy which prevention of disaster as a total system. Next, it set up the check factor of efficiency named the index of systematization and the index of dispersion to try quantification for efficiency calculation of the prevention of disaster plan. Therefore it would be possible to make the synthetic prevention of disaster plan which improve the efficiency organically, after due consideration of the cost and make the lowest level that adoptable total prevention of disaster system include the items which is regulated by the lawful prescription.

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開発住宅地における児童・生徒対象人口の動態について : その 1. 児童・生徒対象人口の実態

谷口汎邦, 森保洋之

原稿種別: 本文
1975 年 233 巻 p. 151-159
発行日: 1975/07/30
公開日: 2017/08/22

DOIhttps://doi.org/10.3130/aijsaxx.233.0_151

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This is a study on the population of children under fourteen years old in New Developed Dwelling Area. This research consists of three sections : Part 1 reporting the result of the population surveys, and Part 2 reporting the analysis of Fluctuation Patterns of the population of children, and Part 3 reporting the relation between Fluctuation population and the planning of compulsory educational facilities. Part 1 is presented here and Part 2, 3 will be presented in the next numbers.

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