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Article type: Cover
1986 Volume 359 Pages
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Published: January 30, 1986
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Article type: Cover
1986 Volume 359 Pages
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Article type: Index
1986 Volume 359 Pages
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Article type: Index
1986 Volume 359 Pages
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Article type: Index
1986 Volume 359 Pages
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Article type: Appendix
1986 Volume 359 Pages
_1_-_2_
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Article type: Appendix
1986 Volume 359 Pages
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Article type: Appendix
1986 Volume 359 Pages
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Published: January 30, 1986
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HIDENORI ONO, HIROSHI HASHIDA, YUTAKA YOKOYAMA
Article type: Article
1986 Volume 359 Pages
1-9
Published: January 30, 1986
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YOICHI MATSUMOTO, TADASHI ONO, TOSHIO MARUICHI
Article type: Article
1986 Volume 359 Pages
10-18
Published: January 30, 1986
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Due to changes in environmental conditions, such as temperature, building joints move continually. Accordingly, sealants in joints are subjected to such movements from the time they are applied. Failures of sealant in joints, such as crack, breakage and deformation particularly those which occur in the short period of time after a sealant has been applied may be caused by the movements of joints during the sealant curing. To study the relation between failures of sealant and the movement of joints, the following were pursued : (1) Development of a strain-cycling exposure rack. (2) Exposure of various types of sealant using the exposure rack. (3) Observation of sealant failures caused by the exposure. (4) Consideration to the relation between the types of failures and the types of sealant. (5) Study of the factors which affect failures of sealant. (6) As a result, a new testing method for outdoor sealant performance which takes into consideration the curing period is proposed.
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HAJIME ASAKUSA, TAKESHI NAKAMURA, MINORU WAKABAYASHI
Article type: Article
1986 Volume 359 Pages
19-25
Published: January 30, 1986
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The paper develops the analytical expression of the moment-curvature relationships (n-m-φ relationships) of concrete encased steel section under constant axial compression. In the analysis, the stress-strain relationship of concrete is assumed to be parabolic up to maximum stress and after that to have a linear falling branch, and that of steel is assumed to be elastic-perfectly plastic. Concrete encased section is divided into two components ; plain concrete section and H-shaped steel section. In both sections, the stress distribution is classified into four fundamental cases. When material properties and dimensions of a section are given, the n-m-φ relationships of the components can be expressed by analytical form as a function of curvature and neutral axis ratio. For the case of the concrete encased steel section, the pattern of stress distribution are classified into 12 fundamental cases under the combination of two components. Carrying moment of each component at arbitrary stage of loading can be easily calculated using curvature and neutral axis ratio, since neutral axis ratio is obtained from equilibrium in axial force. Carrying moment of concrete encased steel section can be obtained by summation of those components, analytically. Accuracy of the proposed analytical method was confirmed by numerical method. The proposed method can be directly applicable to member analysis.
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TOSHIRO SUZUKI, TOSHIYUKI OGAWA, HITOSHI OZAKI
Article type: Article
1986 Volume 359 Pages
26-34
Published: January 30, 1986
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In this paper, a new development of nonlinear analysis using collective elements is described. In the analytical procedure, member post buckling and yielding behavior is modeled on numerically derived curves. Several collapse procedures of square-on square double-layer grids are shown. It is noted that double-layer grids have good deformation capacity when their ultimate strength is not determined by the first buckling of struts. This feature shows a similar tendency with the results of the model experiment.
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SADAICHI TERADA, TOSHIE TAKAHASHI
Article type: Article
1986 Volume 359 Pages
35-42
Published: January 30, 1986
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TETSURO ONO, HIDEKI IDOTA
Article type: Article
1986 Volume 359 Pages
43-49
Published: January 30, 1986
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The purpose of this study is to propose the accurate and simple reliability based design method adjusting the distribution shapes by means of high order moment. In this paper, we propose the high order moment standardizing method, and define a reliability index using the proposed method. Firstly, the high order moment standardizing method, which is able to treat random variables handly, is proposed by using the high order mement, and the proposed method is evolved into the third order moment standardizing mehtod concretely. The high order moment standardizing function is defined in the form of a series with undetermined coefficients. The coefficients are determined by using the information of the high order moments of random variables. Secondly, the reliability index based on the proposed method is defined. The reliability index is composed of the high order moments, which are offered by a finite number of data in the same manner as a mean or a standard deviation. The proposed method is very effective and useful method adjusting the asymmetry or skewness of the distribution shape, even if the statistical data are not given enough to determine the distribution functions of random variables exactly.
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EIZABURO TACHIBANA
Article type: Article
1986 Volume 359 Pages
50-59
Published: January 30, 1986
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KAZUO MITSUI, HIROYUKI SOGABE, YUTAKA KONO, KOJI SUMINO
Article type: Article
1986 Volume 359 Pages
60-65
Published: January 30, 1986
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In the previous paper, nonlinear basic equations of elastic circular arches and rings subjected to uniform external hydro pressure have been introduced, and equilibrium analysis and stability analysis of circular arches with pinned ends have been presented by means of Galerkin's method. The purposes of the present paper are to investigate the equilibrium states for larger value of opening-angle of circular arches and rings, and to examine that the elastic instability can take place in either the form of symmetric snap-through or asymmetric bifurcation. In this paper, the behaviors of circular arches and rings with pined or clamped ends, which have never been obtained, are presented clearly.
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TAKESHI UCHIYAMA, YOSHIZO DOBASHI, SATOSHI OTSU
Article type: Article
1986 Volume 359 Pages
66-73
Published: January 30, 1986
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For rectangular, all-edge-fixed Reissner plates with partial variations in thickness the difference between the result of plate analysis by Reissner's theory and that by the classic theory is examined herein notably with regard to such considerations related to the continuity between two subpanels of a plate of different thickness along their boundary as aspects of abrupt change in the mode of stress distribution across that boundary.
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SHIRO KATO, ATSUSHI MUTOH, MASARU MURATA, ATSUNORI MIYAMURA
Article type: Article
1986 Volume 359 Pages
74-83
Published: January 30, 1986
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A useful method to investigate the effects of random imperfections on the stress distributions of shells is presented. The quantitative effects of the idealized band imperfections are also shown with non-dimensional expressions. In the numerical examples, several samples of geometric imperfections in cooling towers are generated based on the newly proposed scheme by Maximum Entropy Criteria, and the simulated samples are used to investigate the effects of random imperfections on the stress distributions in the towers. The calculations of the static stresses are carried out for the self weight, taking the Ardeer Tower as an example.
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KIYOSHI KANETA, ISAO KOHZU, KAZUO FUJIMURA, YASUSHI SHINOHARA, TAKAO K ...
Article type: Article
1986 Volume 359 Pages
84-92
Published: January 30, 1986
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Strain rate effects in steel structural joints can be one of most significant factors to assess the safety in the structures against high speed loadings like as earthquake shocks. This paper deals with an experiment and the results in the case when typical structural joints are subjected to high speed tensile loadings. Specimens consisted of base metal of mild steel, the butt-welded joints and high strength bolted connections. A special testing machine was manufactured and used so that the tensile loads were applied to the bottoms of the specimens suspended from the reaction frame, with the lever by engaging the cam while using the clutch, after the rotating speeds of the flywheel were controlled at the selected constant values between 350 to 1 500 r. p. m.. The loads and the deflections between the marked points of the specimens were detected and the values were recorded to a data recorder throughout the experiments. Then, the mechanical properties of the specimens were compared with those obtained from the results of the static tensile loading tests. From the test results, it can be seen that the ultimate strengths of the bolted connections are not significantly influenced by the loading speeds, in.spite of the distinct increase of the strengths of base metal and the buttwelded joints.
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TOSHIRO SUZUKI, MAMORU KIMURA, TOSHIYUKI OGAWA, HIDETOSHI ITOH
Article type: Article
1986 Volume 359 Pages
93-101
Published: January 30, 1986
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The outstanding diaphragm connections with steel beams are most popular in steel tubular structures. But, their elasto-plastic behaviors under cyclic loading are not clear in many respects. The purpose of this paper is to clarify the mechanism of stress transmission, deformation capacity and energy absorption capacity. According to this purpose, we made a series of experiments of subassemblages where the column width to thickness ratio was chosen as an experimental parameter. It is recognized that concrete-filled panels have many excellent features.
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IKUO TOKUHIRO, SHINICHI SHIOYA
Article type: Article
1986 Volume 359 Pages
102-109
Published: January 30, 1986
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Up to now, a frame with spandrel wall such as deep beam has been calculated by assuming the rigid zones in columns. But this method is not always accurate in taking account in stresses. Accordingly, in this paper a stress calculation method of frame with spandrel walls without assuming rigid zone is shown, and it is presented that the results by the proposed method fairly agree with the photo-elastic experimental results.
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HIROZO MIHASHI, MASANORI IZUMI
Article type: Article
1986 Volume 359 Pages
110-116
Published: January 30, 1986
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YUJI HASEMI
Article type: Article
1986 Volume 359 Pages
117-124
Published: January 30, 1986
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An engineering model of the upward flame spread along a vertical combustible surface and experimental relationships of wall flame heat transfer, the principal process leading to the flame spread, are described. This model is based on a concept of ignition and flame spread as a result of inert heating of the solid to an ignition temperature. Experiments using porous line gas burners against isothermal and thermally thin walls have resulted in a representation of the distribution of the incident heat flux to wall surface as a function of height divided by a characteristic length representing turbulent flame heights.
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Article type: Appendix
1986 Volume 359 Pages
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Article type: Cover
1986 Volume 359 Pages
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