日本建築学会構造系論文報告集

表紙

原稿種別: 表紙
1986 年 367 巻 p. Cover1-
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_Cover1

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目次

原稿種別: 表紙
1986 年 367 巻 p. Cover2-
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_Cover2

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CONTENTS

原稿種別: 目次
1986 年 367 巻 p. Toc1-
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_Toc1

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<内容区分と表示について>

原稿種別: 目次
1986 年 367 巻 p. Toc2-
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_Toc2

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奥付

原稿種別: 目次
1986 年 367 巻 p. Toc3-
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_Toc3

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ロジスティック曲線を応用したコンクリート強度推定式の提案 : 普通ポルトランドセメントの場合

洪悦郎, 鎌田英治, 田畑雅幸, 浜幸雄

原稿種別: 本文
1986 年 367 巻 p. 1-7
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_1

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Relation between the maturity and compressive strength development of concrete was aproximated by appling logistic curve and suggested new estimating method of concrete strength. The new estimating method has some advantages compared with the method described in present JASS 5 as following, 1) By using Early Temperature Correction C, a tendency to show a lower value of concrete strength as low temperature curing at the same maturity in early days is corrected. 2) The logistic curve shows all of the strength development process, so it is of wide application. 3) Regardless of age, it is possible to estimate not only a value of the middle but also of the lower and higher limits of concrete strength. 4) It is possible to derive concrete strength at any age from the strength at standard age (210°D・D and 840°D・D). 5) Because logistic curve is a statistical curve, it is useful when using computer.

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コンクリートの凍害の環境要因効果に関する実験的研究 : コンクリートの耐凍害性におよぼす環境要因の影響(その1)

田畑雅幸, 洪悦郎, 鎌田英治

原稿種別: 本文
1986 年 367 巻 p. 8-15
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_8

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The influence of environmental conditions on the frost damage of concrete was studied, by using concretes of three frost durable and of three suceptible in accordance with test programs of experimental testing methods. After curing for three weeks under various conditions such as in air and in water, almost all concrete samples were frozen and thawed in water under the freezing process. Test results were summarized as follows. 1) No concrete was damaged when the test was carried out with a minimum temperatuer of -2℃, but the extent of damage had a tendency to become severe in proportion to a drop in the minimum temperature of the freezing process. 2) The condition, of the concrete before the process of freezing and thawing also had an-important effect on the frost damage of concrete. Curing in air for one week being after immersed in water increased the frost resistance remarkably in all concrete samples. 3) The test condition of freezing in air had a fairly small effect on the frost damage of concrete compared with that of freezing in water. 4) Conditions of freezing rates and of periods of maintained minimum temperatures also had an effect on the frost damage of concrete.

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コンクリートの耐凍害性におよぼす脱型までの取り扱いの影響

田畑雅幸, 洪悦郎, 鎌田英治

原稿種別: 本文
1986 年 367 巻 p. 16-22
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_16

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Influence of the treatment of concrete at an early period on frost damage after hardening was studied by changing the conditions of specimens, while they were in the mold. Freezing and thawing tests of (A) method designated in ASTM C 666 were carried out after curing in water in the same conditions as those of the various conditions in the mold. The sealing condition of the exposed of concrete, temperature and humidity of the surroundings, time of the removal from the mold and the surface period of leaving specimens in air after removal were varied as test conditions of treatment of specimens. Test results are summarized as follows. 1) Althougth freezing and thawing tests were carried out after about 2 weeks of water curing, a fairly large difference in frost resistance was recognized between the concretes sealed with a vinyl sheet and those left with the surface exposed. 2) The difference in frost resistance of concrete caused by early treatment resulted mainly from the degree of saturation just before the freezing and thawing test. 3) As a condition of the standard test, the surface of the concretes should be sealed carefully, while they are in the mold. Curing in water for a long period may reduce the influence of the conditions at an early period.

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多孔質無機材料の凍結融解を伴わない凍害劣化とその評価法 : ALCを中心とした凍害メカニズムの検討

千歩修, 鎌田英治, 洪悦郎, 田畑雅幸

原稿種別: 本文
1986 年 367 巻 p. 23-29
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_23

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Recently, porous inorganic materials, such as ALC, have been used as external walls. In comparisson with usual concrete, porous inorganic materials are damaged by frost suddenly and severely, and mechanism of frost damage of porous materials are thought to be different from that of concrete. In this paper, a new test method, which gives specimen a thermal gradient and water supply, is proposed. Using this test method, one of the charasteric frost damage of porous materials is clalified, and the mechanism of frost damage is discussed. Analysis of test results revealed that ; (1) Some inorganic materials are damaged under the conition which exposes speciment thermal gradient and supplies water from warm side without freezing and thawing. This damage part is limited, and almost same as 0℃. (2) Sealed specimens are damaged under the one side freezing condition, and this critical degree of water content is lower than that of freezing and thawing condition. (3) Damage under the one side freezing condition have much to do with water absorbtion, and have less to do with duravility under freezing and thawing condition.

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模擬地震動作成における波形制御について

木村正彦

原稿種別: 本文
1986 年 367 巻 p. 30-36
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_30

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A Simulated earthquake ground motion f(t) is usually generated by using FFT. To generate f(t) using FFT, results in the problem of control of its characteristics based on the operation in frequency domain, by which the characteristics of f(t) are determined. Nonstationary characteristics of frequency and amplitude of f(t) are most important ones, and generally they are not discussed considering local shape of f(t). Local shape of f(t) gives a significant effect on the hysteretic response of structures. But this has not been actively considered in generating simulated earthquake ground motions. In this paper it is clarified that local shape of f(t) is closely related to φ^+(0) (see Fig. 1), generally some, _0φ_i (see Eqs. (13), (14) and Fig. 3), the values of Fourier phase spectrum. Actually simulated earthquake ground motions are generated considering φ^+(0) and some _0φ_i and it is demonstrated possible to control local shape of f(t) by selecting φ^+(0) and some _0φ_i corresponding to the shape.

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一方向型吊屋根のフラッタに関する基礎的研究 : 壁付吊屋根のフラッタの発生機構について

三宅昭春, 吉村健, 森下正浩, 園田東二

原稿種別: 本文
1986 年 367 巻 p. 37-47
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_37

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Aerodynamic responses for elastic membranes are investigated for the. purpose of elucidating the mechanism of single-degree-of-freedom flutter of suspended roofs with walls (one-way-type). Elastic membranes and rigid plates, which form roofs and grounds of suspended roofs, respectively, are attached to the upper and the lower surfaces of each prismatic bar with 〓-section having width-to-height ratios, of 4, 5 and 8, in the experimental models. The model is mounted horizontally in the working section, and both sides of the model is fixed to the tunnel wall. The main results obtained are summarized in the followings. 1) The single-degree-of-freedom flutter for models without ground occurs in a restricted range of wind speed centered around the one at which the frequency of vortex shedding coincides with a natural frequency of each model. The characteristic responses, which are simillar in trend to those for spring-mounted rectangular prismatic bars with the same elongated cross-sections, indicate that the instability observed is occurred by the vortex excitation. 2) The responses for models with ground are also simillar in trend to those without ground. Therefore, it can be concluded that the instability observed in suspended roofs is caused by the vortex excitation. The vortex excitation of elongated bluff cross-sections is known as flutter coupled with the impinging-shear-layer instability. Elastic membranes comprising cavity floors are also susceptible to the same vortex excitation. The responses of elastic membranes of this cabity type obtained in the experiment are simillar in trend to those for suspended roofs, which is another evidence for the validity of the concluding remark 2). mentioned above.

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2次元高次理論による厚板の解析

松永裕之

原稿種別: 本文
1986 年 367 巻 p. 48-58
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_48

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Based on the expansion of displacement components of a plate into the power series of a thickness coordinate, a set of the fundamental plate equations of two-dimensional higher order theory is derived through the principle of virtual work in terms of the expanded strain tensors and the higher order stress resultants. For elastic plates of isotropic materials, a set of linear constitutive equations is also derived in terms of the expanded displacement components. Through the equilibrium equations of a three-dimensional continuum, stress components are determined in terms of the expanded displacement components with satisfying the stress boundary conditions on the upper and lower surfaces of a plate. The governing set of equations is completely decoupled into the sets of equations governing the in-plane and the out-of-plane deformation modes. There are stress resultants of higher order than bending moments and shear forces involved in the governing equations. These higher order stress resultants or the corresponding expanded displacement components may be necessarily prescribed in the specification of boundary conditions on the middle surfasce of a plate. Truncated approximate equations of the present theory are solved for an infinite plate subjected to sinusoidally (or uniformly) distributed pressure on the upper surface. All the components of displacement and stress are obtained in power series of the thickness coordinate for each level of several approximate theories. The results are compared with those obtaind from exact solution available from three-dimensional elasticity theory. The relative accuracy of the solutions of the present approximate equation is then determined by direct comparison of the approximate solutions with the exact solution.

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2軸偏心圧縮を受ける鉄筋コンクリート長柱の終局耐力 : その1 正方形断面柱の載荷実験

岩井哲, 南宏一, 若林實

原稿種別: 本文
1986 年 367 巻 p. 59-68
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_59

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The elastic-plastic behavior of reinforced concrete slender columns subjected to biaxially eccentric loads is investigated. A total of 23 column specimens with 12 cm × 12 cm square cross section were tested in three groups ; 7 short columns, whose column length to section depth ratio were 6, and two groups of 8 long columns, whose length to depth ratios were 16 and 26, respectively. Loads were applied monotonically at each column end with equal eccentricities of 0, 0.6, 1.2, 2.4 and 6.0 cm at angles of 0, 22.5 and 45 deg. from an axis of symmetry. The ultimate loads, longitudinal and transverse deformations and the behavior up to failure were examined in detail. The ultimate load carrying capacity of a slender column is reduced by the additional eccentricity due to lateral deflections of the column caused by bending. It is observed that, from data of logitudinal strain, the plane sections remain plane after biaxial bending, and that the maximum compressive strain at crushing of concrete reaches 0.005 when a material failure occurs. Two approximate methods of analysis, proposed by Bresler and Ramamurthy, for calculating the ultimate loads of short columns are examined. Computed results of the ultimate loads are found to agree well with the test results.

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角型鋼管柱・H形はり接合部パネルの耐力と変形能力に関する研究

田渕基嗣, 金谷弘

原稿種別: 本文
1986 年 367 巻 p. 69-79
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_69

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This paper examines the effects of the width to thickness ratio (B/T) of panel, the axial force of the panel, the existance of transverse beams and the stiffening method for the local deformation of the connection on the behavior of the joint panels. The connections with B/T<30 have sufficient load carrying capacity and deformation capacity. On the other hand, the ones with B/T≧40 have unsufficient behavior because of the premature shear buckling of the panels. The yield and the maximum strength are calculated by Eq. (1) and Eq. (2) respectively. For the design purpose, Eq. (7) is available.

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関東ロームの支持力に関する研究 : 平板載荷試験結果からみた長期支持力の評価について

佐藤輝行

原稿種別: 本文
1986 年 367 巻 p. 80-90
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_80

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An evaluation of the allowable bearing capacity of Kanto Loam is ordinary determinated by the curves resulted from plate loading tests, i.e., deformation and failure characteristics under each loading stage. Conclusions are as follows ; (1) Characteristic of Kanto Loam Settlement are to be mostly regarded as compressive deformation. (2) Characteristics of Kanto Loam-failure are (a) no sliding surface in the soil and (b) occurrence compressive zone just under the plate. And pattern of Kanto Loam-failure is similar to punching shear failure. (3) Relationship between loading pressure and settlement has a trend to change sharply around a point of consolidalion yield pressure and after passing this point, settlement increases greatly. (4) Long allowable bearing capacity ranges from 10 to 20 t/m^2. This capacity nearly equales to the value of 1.5 times-yielding pressure. (5) Value of bearing-capacity factor (N_c) equales almost to Terzaghi's factor (N_c) in local shear failure.

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横等方弾性体の水平方向点加振問題に関する研究

勅使川原誠司, 松岡理

原稿種別: 本文
1986 年 367 巻 p. 91-102
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_91

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There are a few papers concerning the study of the propagation of vibrations of a semi-infinite anisotropic solid, but whose mechanical properties are not clear. The present investigation endeavours to explain the mechanical properties of a transversely isotropic medium subjected to a horizontal surface point exciting force, now known as the "Dynamic Analogue of Cerruti's Problem". This problem is solved by Fourier Integral transformation and its solution is calculated numerically. Consequently, it is found that the effect of anisotropy is appeared clearly in the case of the horizontal exciting force rather than in the case of the vertical one.

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基本物理量の相互関係に基づく地盤と基礎の動的相互作用解析

吉田長行, 藤谷義信, 藤井大地

原稿種別: 本文
1986 年 367 巻 p. 103-110
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_103

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There exist three fundamental physical quantities in the dynamic soil-foundation interaction problem. These are the real and imaginary parts of impedance, and the seismic exciting force. An integral equation formulation based on the dynamic Green's functions for an elastic medium is developed for use as a tool in analyzing the fundamental physical quantities. A limited number of the evaluation for them are available at present, most of which are restricted to the case of flat foundations because in case of the embedded foundation the enormous computational time is needed for calculation of the dynamic Green's functions. It is the objective of this work to remove the limitation by applying interrelations of the physical quantities to the boundary integral equation method. The displacement field is represented by the displacement component of the Green's functions and the source distribution at the interface of soil and foundations. Both of the imaginary part of the impedance and the static impedance are directly obtained by the source distribution. The real part of the impedance is indirectly calculated from them by the Hilbert transform. The seismic exciting force is represented as the product of the source distribution and the free-field motion through use of the reciprocal theorem. Therefore, the evaluation of the physical quantities reduces to the problem of determining the intensity of source distribution. The proposed method resolves a prevailing shortcoming in the analysis of the embedded foundation ; the necessity of calculation for the stress components of the dynamic Green's functions.

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構真柱鉄骨における柱脚根入れ部の設計に関する研究 : 長い構真柱ぐいの実測による考察

若林嘉津雄

原稿種別: 本文
1986 年 367 巻 p. 111-120
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_111

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The temporary steel columns, unlike ordinary temporary support, serve as key elements for "Inverse (top-down) Concreting Method" for basement construction of a buildinng. The column is anchored into cast-in-place concrete pier to form a composite column-and-pier (named "Koh-shin-chu" in Japanese) structure of which function is to support the partially completed basement structure during construction, starting with the ground floor toward lower floors on a floor-by-floor basis. Discussed in this paper is a practical guidance for the design of anchoring portion on the basis of the observation and measurement at the actual construction site, while particular significance is given to stress transmission mechanism from the column to pier. The following conclusions are arrived at this stage. 1) Stress transmission at the anchoring portion is well evaluated by making reference to the bond stress. For the time being, the allowable bond stress should be kept at in the order of F_C × 3 % in maximum until more reliable quantitative guideline is formulated through the future study. 2) For the purpose of design, no bearing stress should be taken into account at the bottom horizontal plane of steel column which is in contact with pier concrete. 3) Stud dowels provided at the anchoring portion of column in horizontal direction are effective in the stress transmission from steel to concrete.

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金属製サイロの座屈後の動的挙動

三幣正, 北川博, 柴田耕一

原稿種別: 本文
1986 年 367 巻 p. 121-130
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_121

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We propose the analytic methods which are comparatively easy to carry out in analazing the dynamic behavior of stractures where rigidity degrade suddenly after buckling and we therefore used these methods in computing and examining the degree of security in metal silos. From the above analyzes we found the following results. 1) Silos with an axial force of 10 % in relation to the critical buckling load showed no collapse when subjected to EL-CENTRO, TAFT, TOKYO-101 and WHITE-NOISE earthquake waves test even up to a maximum acceration of 1000 gal. 2) Silo with an axial force of 20 % have a damage risk when subjected to 800 gal of EL-CENTRO and WHITE-NOISE. 3) We think that silos with axial force of 30 % woud'nt show collapse until an earthquake of up to 400 gal intensity occured.

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金属製サイロの座屈後の振動特性とその解析

三幣正, 見坐地一人, 北川博, 柴田耕一

原稿種別: 本文
1986 年 367 巻 p. 131-142
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_131

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We made the load test by the model of metal silos, (including after buckling) We propose the analytic method which carry out in analazing the vibration characteristic of structures where rigidity degrade suddenly after buckling and we looked at the characteristic of the model in metal silos.

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基礎の回転を考慮した開断面耐震壁[D]値 : 一般骨組内の開断面立体耐震壁の解析についてその4

荒井康幸, 柴田拓二

原稿種別: 本文
1986 年 367 巻 p. 143-150
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_143

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The shear walls with a U or L shaped section are commonly employed in building structure to resist the forces imposed by earthquakes. An approximate method for analysis of space-frame with open-section shear walls subjected to lateral loading was presented in the authors' previous paper. The proposed method is an extension of Dr. Muto's D-value method for three dimensional analysis of buildings with open:section shear walls. In this paper, [D]-value matrix of open-section shear walls supported on elastic foundations is derived.

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鉄筋コンクリートはり柱接合部における付着すべり

市之瀬敏勝

原稿種別: 本文
1986 年 367 巻 p. 151-159
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_151

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Parametric analyses were carried out. Variable was the height of the column. Design criteria was proposed to prevent the bond failure of beam bars in the joint. The length of the yield penetration region in the joint was evaluated by the following equation, [numerical formula] where μ was the ductility factor, ε_y was the yield strain of beam bar, ε_<SH> was the strain at the onset of strain hardening, and l' was the shear span length of the beam. The effects of the pull-out from the joint upon the bond failure of column bars in short columns were also studied. Considering these effects, design criteria to prevent the failure was proposed.

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「活性白土を用いた風洞実験による水平屋根,山形屋根の屋上積雪形状」に対する討論(遠藤明久・苫米地司著, 日本建築学会構造系論文報告集第357号・昭和60年11月掲載)

桜井修次, 城攻

原稿種別: 本文
1986 年 367 巻 p. 160-161
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_160

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桜井修次氏,城攻氏への回答

遠藤明久, 苫米地司

原稿種別: 本文
1986 年 367 巻 p. 161-162
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_161

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SI単位の換算率表

原稿種別: 付録等
1986 年 367 巻 p. App1-
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_App1

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裏表紙

原稿種別: 表紙
1986 年 367 巻 p. Cover3-
発行日: 1986/09/30
公開日: 2017/12/25

DOIhttps://doi.org/10.3130/aijsx.367.0_Cover3

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