日本建築学会構造系論文報告集

表紙

原稿種別: 表紙
1990 年 410 巻 p. Cover1-
発行日: 1990/04/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.410.0_Cover1

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目次

原稿種別: 表紙
1990 年 410 巻 p. Cover2-
発行日: 1990/04/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.410.0_Cover2

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CONTENTS

原稿種別: 目次
1990 年 410 巻 p. Toc1-
発行日: 1990/04/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.410.0_Toc1

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訂正

原稿種別: 文献目録等
1990 年 410 巻 p. Misc1-
発行日: 1990/04/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.410.0_Misc1

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日本建築学会構造系論文報告集ならびに日本建築学会計画系論文報告集論文募集

原稿種別: 文献目録等
1990 年 410 巻 p. Misc2-
発行日: 1990/04/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.410.0_Misc2

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奥付

原稿種別: 文献目録等
1990 年 410 巻 p. Misc3-
発行日: 1990/04/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.410.0_Misc3

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コンクリート表面における腐食モニタリング用電気化学的特性値の一解釈

田村博, 永山勝

原稿種別: 本文
1990 年 410 巻 p. 1-8
発行日: 1990/04/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.410.0_1

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It is very important to clarify both effects of electrochemical characteristics of steel in concrete and those of concrete cover on the electrochemical measurements taken on concrete surface. The authors developed a new fundamental experimental method for solving the problem. The main conclusions obtained by using this method are followings. (1) Measurements of natural potential taken on concrete surface are affected by the inner potential difference of a measuring point on concrete surface against a point on concrete surface touching with steel in concrete. (2) In the case that the natural potential on the steel surface is uniformly equal to E_0 and the inner potential difference mentioned above is uniformly equal to α, the natural potential taken on concrete surface is equal to (E_0 + α). (3) The inner potential difference is much influenced by the moisture distribution in concrete. In the case that the outer surface portion contains more moisture than the inner surface portion touching with steel, the potential difference indicates a negative number. The absolute values of the potential difference sometimes reach around 200 mV. (4) The electrochemical characteristics measured on concrete surface are expressed with both electrochemical characteristics of steel in concrete and concrete cover by an equivalent electric circuit.

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屋外ばくろ試験におけるポリエチレン試料の特性変化予測 : 高分子系建築材料の耐久性予測モデル(その1)

冨板崇

原稿種別: 本文
1990 年 410 巻 p. 9-17
発行日: 1990/04/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.410.0_9

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In order to predict service life of polymeric building materials, the application of several mathematical formulations is being discussed recently. As the first approach, the most simple polymer, unstabilized polyethylene film was studied in this paper. This PE sample is specified by "JIS K 7200-1986, Standard Reference Test Specimens for Calibrating a Laboratory Light Exposure Apparatus, SR-LS-PE-8604". Photo-oxidation reaction in PE produces carbonyl groups, which can be quantified by infrared abrsorbtion spectrum. The absorbance ratio, A_r, of carbonyl absorbance to methylene is an index of degradation. A_r=A_<1715>/A_<2030> where, A_<1715> : IR carbonyl absorbance at 1715 cm^<-1> and A_<2030> : IR methylene absorbance at 2030 cm^<-1> From the result of preliminary thermal degradation test of PE specimens, the effect of heat under outdoor exposure test was estimated to be negligible. Samples were exposed outdoor on 0°, 30° and 90° planes facing to south in Tsukuba, Japan, lat. 36°7' 38"N, long. 140°4'39"E, every month from November 1986 to Octber 1988. Collected absorbance ratios were expressed as various functions of fructuating outdoor solar ultraviolet energy and temperature of samples. Among the all these models, Koike and Tanaka's Model, [numerical formula] where, C_u : ultraviolet degradation constant, -, U_v :solar ultraviolet energy in 10 minutes, KJ/m^2, α : power number, ultraviolet degradation constant, -, E_u : activation energy of ultraviolet degradation reaction, KJ/mol, R : gas constant, 8.314×10〜<-3> KJ/mol/K and T_p : temperature of sample observed every 10 minutes, K. produced most acceptable accordance of calculated Ar with observed A_r. Obtained degradation constants and correlation factor, r, between observed and calculated Ar are as follows : number of samples, n=72, C_u=1.29×10^<3>, α=0.0165, E_u=36.2, r= Degradation constants, which produce the least error between observed and calculated Ar, are : number of samples, n=24, C_s=2.66×10^5, γ=0.235, E_s=39.6, r=0.9899 Introducing these values and meteorological data at Asahikawa, Choshi and Okinawa, the absorbance ratios of samples exoosured were estimated and compared with the observed ones.0.9882 The value of α is far more smaller than it has been estimated. This predicts that ultraviolet ray initiates photo-oxidation reaction and that oxigen dispersion dominates degradation rate. The absorbance ratios of samples exposured horizontally could be expressed as a function of meteorological factors, solar radiation energy and ambient temperature in daytime : [numerical formula] where, C_s : solar degradation constant, -, S_p : daily amount of solar radiation energy, KJ/m^2, γ : power number, solar degradation constant, -, E_s : activation energy of degradation reaction, KJ/mol, T_D : average ambient temperature in daytime, K, T_D=(T_6/2+T\9,+T_<12>+T_<15>+T_<18>/2)/4 ; sub-number means observed o'clock, JST (Japan Standard Time)

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貫通仕口による木造ラーメン(大黒柱)構造の研究 : その3 実用設計計算法の提案

立川剛, 後藤一雄

原稿種別: 本文
1990 年 410 巻 p. 19-25
発行日: 1990/04/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.410.0_19

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This paper proposes a simple design system for wooden semi rigid structures, "NUKI" structures. It is easy for us to compute the floor displacement with the rigidity of "SHIGUCHI" joints. The contents of this paper are as follows ; 1. Introduction. 2. Outlines of experimental resarch on wooden specimens subjected to partial lateral pressure. 3. Outlines of theoretic resarch by using two-dimensional finite element method. 4. Comparisons between experimental results and numerical ones. 5. Propositions of the approximate values of Young's modulus E_H in case of wooden specimens subjected to partial lateral pressure.

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鉄筋コンクリート造柱の曲げ降伏後の限界変形に関する研究 : (その1)柱の中心圧縮実験,純曲げ実験および曲げせん断実験とその相関

平石久廣, 稲井栄一, 板倉康久, 高崎哲哉, 石渡康弘, 川島俊一, 勅使川原正臣

原稿種別: 本文
1990 年 410 巻 p. 27-39
発行日: 1990/04/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.410.0_27

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The authors have already proposed the concept of "Stable Limit" on the deformation capacity of columns in seismic design, from the viewpoint of energy absorption in columns, and have also presented the methods for evaluating the strains, curvature, and deformation at the stable limit. In order to verify the "Stable Limit" concept and the adequacy of the proposed method of evaluation, compression tests, bending tests, and shear bending tests of columns were conducted. The following findings can be drawn from these tests and their investigation. 1) Three moment versus curvature relations adequately correspond to each others ; one of them is given by the analysis of the critical section using the stress versus strain relation of the compression test, the other two are directly obtained from the bending test and the shear bending test, respectively. 2) In case of low axial stress, the columns under cyclic lateral loading are considered to behave almost same as the columns under monotonic loading ; the deformation capacity of the columns corresponds to the deformation at the stable limit, and the proposed method of evaluation is sufficiently accurate. 3) However, in the case of high axial stress, the cyclic loading history greatly affects the deformation capacity of the columns, and the proposed method of evaluation can not adequately predict the deformation capacity. The detailed verification of the method of evaluating the strains, etc. at the stable limit, a method of evaluating the deformation capacity of the columns under high axial stress level, and a reasonable design method for confinement in columns will be reported in the near future.

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高層壁式ラーメン鉄筋コンクリート造建物における壁柱の曲げ降伏後の靭性に関する実験的研究

平石久廣, 稲井栄一, 仲地唯治, 川島俊一, 勅使川原正臣

原稿種別: 本文
1990 年 410 巻 p. 41-52
発行日: 1990/04/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.410.0_41

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Seismic tests of thirteen columns with large depth (D)-to-width (b) ratio (hereafter referred to as "Wall Columns") were conducted. The main variables in the tests were : 1) confinement in the compression zone, 2) depth-to-width ratio, 3) presence of transverse walls, and 4) axial stress level. All of the speciments behaved in a ductile manner, and their final failure was caused by the crushing of concrete in the compressive edge zone. The following conclusions concerning the deformation capacity were obtained from this tests and investigations. (1) Confinement of concrete in the compressive edge zone is very effective to increase the deformation capacity of wall columns. (2) The deformation capacity dramatically decreases when the depth-to-width ratio of wall columns increases. (3) The wall columns with transverse walls behave in a ductile manner more than the wall columns without them if they are in the compression zone. (4) The smaller the axial stress level is, the greater the deformation capacity is. (5) The deformation capacity can be estimated by the flexural theory if the stress versus strain relation of confined concrete, including the negative slope after the maximum compression strength is properly defined.

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鋼繊維とせん断補強筋との複合抵抗機構に基づく鋼繊維補強鉄筋コンクリート柱のせん断耐力

永坂具也, 望月重, 槇谷栄次

原稿種別: 本文
1990 年 410 巻 p. 53-61
発行日: 1990/04/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.410.0_53

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There have been reported many reserches on effectiveness of steel fibers on structural performance of concrete members. However, there has been no research which presents shear reinforcement mechanism of steel fibers in reinforced concrete members with both of conventional web reinforcement and steel fibers This paper describes a method for evaluating effects of steel fibers on the shear capacity of rein- forced concrete columns with steel fibers in addition to conventional hoop bars. The significant points in this paper are as follows : 1) The shear capacity shared by steel fibers was assumed to be the pullout capacity of steel fibers across diagonal cracks, which was evaluated with use of the results obtained from the direct tension tests on steel fiber reinforced concrete. 2) It has been verified that the shear capacity by steel fibers can be considered to be additional to the shear capacity of conventional reinforced concrete column with hoops alone. 3) The method is useful in shear design for ensuring ductility of columns, because the additional shear capacity can be estimated according to the allowable width of diagonal cracks related to the strain level of hoop bars which is considered as a measure of the ductility of column.

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プレストレストコンクリート曲げ部材の復元力特性に関する研究

岡田満, 浜原正行, 末次宏光, 本岡順二郎

原稿種別: 本文
1990 年 410 巻 p. 63-69
発行日: 1990/04/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.410.0_63

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In order to study the behavior of inelastic deformation and hysteresis characteristics of prestressed concrete flexural beams, 66 prestressed concrete beams of rectangular sections were tested under reversed loading. The experimental variables in the test series included : a shear span ratio ; a tensile reinforcement index ; a ratio of tensile inforcement index for prestressing steels and for reinforcing bars ; the amount and spacing of confining reinforcement ; and the location of prestressing steels. On the basis of the test results, the conventional restoring force characteristics model, of prestressed concrete flexural beams, was proposed. With respect to the deformation at flexural yield and the hysteretic damping ratio, agreement between the calculated values predicted by the model and the measured values were considerably good. Furthermore using this model, an earthquake response analysis for reinforced concrete column was made, and the analytical results were compared with the pseudo-dynamic test results. The analvtical results agreed well with the test results.

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ヒューマンエラーが複層立体トラス構造の力学的性質に与える影響に関する研究

和田章, 王竹

原稿種別: 本文
1990 年 410 巻 p. 71-80
発行日: 1990/04/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.410.0_71

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Human error is recognized as the major cause of structure failure. In this paper, the authors simulate human error in the process of structural design, manufacture, assembly and erection, and investigate statistically the influence they have on the structure's behavior. A 6×6 square plan double-layer space truss is designed and used as an example. A computer program is written to analyze the truss structure, with the ability to realistically simulate member buckling and to automatically adjust the displacement increment. The Monte Carlo method is used with trial number set to 100. The fully intact truss, and groups of trusses with either design errors, assembly errors, or variations in member strength, are analyzed and investigated statistically. It is found out that human error has a much bigger influence on the behavior of double-layer grids than member strength variation, and for the standard deviation of the structure strength, the influence of these two factors is shown to differ at least by a factor of 6.

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有限共振原理に基づく偏心構造物の極限応答解析 : II一軸偏心の場合のパラメトリック応答解析

山田稔, 河村廣, 谷明勲, 亜洲

原稿種別: 本文
1990 年 410 巻 p. 81-92
発行日: 1990/04/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.410.0_81

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This paper has performed a parametric study on the lateral-torsional response of inelastic single- story asymmetric building structures comprising bilinear hysteretic elements by using MODE-SEPARATING RESPONSE ANALYSIS METHOD BASED ON FINITE RESONANCE PRINCIPLE in the part 1 of this research. In this paper, the following terms have been considered as the system parameters : 1) eccentricity ratio 2) aspect ratio 3) initial elastic period 4) initial base shear coefficient Then, the effects of the system parameters on the lateral-torsional response have been examined through the parametric study. The results have been produced interesting conclusions among which the followings are important for earthquake resistant design of building structures with eccentricity in strength as well as stiffness. 1) The results are compared with those obtained by Runge-Kutta's numerical integration method, and confirmed good coincidence between them within the entire period domain. 2) The lateral displacement of the center of mass does not vary with changing the eccentricity ratios at all for the system having small aspect ratios, but increases some what with increasing the eccentricity ratios for the system having large aspect ratios despite of the case of long natural periods. 3) The torsional displacement of the system increases almost linearly with increasing the eccentricity ratios for the system having small aspect ratios, but not linearly for the system havinglarge aspect ratios. 4) The peak ductility demand of the element located on the weak stiffedge in the eccentrical direction increases with increase in eccentricity ratios within the almost entire period domain. And the increase of the peak ductility demand is mainly caused by increase of the torsional displacement. 5) The system shows somewhat constant in the total plastic energy absorbed in an eccentrical buildinga despite of changing eccentricy and aspect ratio.

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繰返し面内せん断力を受ける鉄筋コンクリート平板の弾塑性解析モデルに関する研究

栗原和夫, 大森信次, 高橋敏夫, 坪田張二, 井上範夫, 渡辺茂雄

原稿種別: 本文
1990 年 410 巻 p. 93-105
発行日: 1990/04/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.410.0_93

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In order to establish a rational design method for reinforced concrete (RC) structures against earthquakes, a Finite Element Method (FEM) using "Smeared Crack Model" is considered to be one of the most powerful and effective techniques. The authors are devoting themselves to construct a hysteretic constitutive model of RC under reversed cyclic loads to be used in FEM analysis. At the first step of the research work for establishing a hysteretic constitutive model, the fundamental test series, i. e. the shear test series of RC panels subjected to reversed cyclic in-plane shear stress were conducted by the authors. In the previous paper, the obtained test data of this experiment and the dominant characteristics for the nonlinear analysis of RC panels were presented quantitatively as well as qualitatively. In this paper, a new constitutive model for the analysis of hysteretic behavior of cracked concrete is proposed based on the hysteretic characteristics concerning the folowing items ; 1) cracking stress 2) residual stress and strain caused by alternating shear 3) slip stiffness in low stress state 4) stress-strain relationships of tensile and compressive concrete 5) variation of stress and strain caused by reversal alternating shear The new model was developed by modifying the Collins' theory which was originally derived from monotonic shear tests of RC panels to represent the behavior well under alternated reversal in-plane shear loading. The appropriateness of the proposed constitutive model was shown by applying it to the shear test series of the authors described in the previous paper. Furthermore, the model was also applied to other existing panel tests and torsional cylinder tests. The analytical results grasped well the observed test ones in each case and it is concluded that the proposed constitutive model is adequate.

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ハンガー式およびユニット式張力膜の構造特性に関する模型および実大実験 : 張力膜構造の研究(その2)

斎藤公男, 黒木二三夫

原稿種別: 本文
1990 年 410 巻 p. 107-121
発行日: 1990/04/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.410.0_107

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Hanger Type and Unit Type of Tension Membrane structures have been proposed by the authors as a hybrid system which are able to introduce or reintroduce the initial prestressing force easily. They also are expected to obtain the structural rationality for the additional wind and snow load by utilizing their three dimensional curved surface. Following the study of Part 1 in which both the numerical and the experimental analysis were carried out as for single pannel of each type, the problem of making initial surface by prestressing, the statical behavior of whole structures and relationship between stress relaxation and represtressing are researched through several model experiments in this paper. Especially Tension Truss Dome (TTD) proposed as a representative Hanger Type with the diameter of 10 meters was tested against wind load (160 kg/m^2) and snow load (60kg/m^2), and its structural effectiveness was confirmed. Through the measurement of tensile reaction as for real membrane roof which showed large amount of stress relaxation, the necessity of represtressing device was recognized clearly. From not only structural but aesthetical view points, some examples of space constitution are presented by means of the combination with such supporting members as arches, trusses and cables.

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計画系論文報告集目次 No.410 1990・4

原稿種別: 付録等
1990 年 410 巻 p. App1-
発行日: 1990/04/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.410.0_App1

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裏表紙

原稿種別: 表紙
1990 年 410 巻 p. Cover3-
発行日: 1990/04/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.410.0_Cover3

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