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Article type: Cover
1981 Volume 304 Pages
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Published: June 30, 1981
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Article type: Cover
1981 Volume 304 Pages
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Published: June 30, 1981
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Article type: Index
1981 Volume 304 Pages
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Published: June 30, 1981
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Article type: Appendix
1981 Volume 304 Pages
App1-
Published: June 30, 1981
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MASAYUKI HOSHINO, YOSHIRO KOH
Article type: Article
1981 Volume 304 Pages
1-10
Published: June 30, 1981
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HIDENORI ONO, HARUO SHIBASAKI, SEISHI KAWAMURA, MAKOTO YOSHIOKA
Article type: Article
1981 Volume 304 Pages
11-19
Published: June 30, 1981
Released on J-STAGE: August 22, 2017
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The purpose of this paper is to establish the estimating method of the shock absorbing effect of judojyo floors. The apparatus consists of a free dropping weight, a rubber spring, a load cell, an displacement meter, a dynamic strain meter, an electro-magnetic osciilograph and so on. Seven characteristic floors from the view point of athletes' sense of the shock absorbing effect were surveyed by the apparatus. From the results of measurement by the apparatus, the physical characteristics of floors could be extracted concerning to the athletes' sense. From the results of corresponding between the athletes' sense and physical characteristics of floors, the estimating method and the most suitable range of the value of the value of the shock absorbing effect of judojyo floors were presented.
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HARUO TAKIZAWA
Article type: Article
1981 Volume 304 Pages
21-29
Published: June 30, 1981
Released on J-STAGE: August 22, 2017
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In succession to the examinations reported in Part II, the former half of the current presentation is devoted to completing the second phase of this study where the dynamics of typical constituent elements has been a matter of particular interest. The remaining problems arise from practically important combinations of the fundamental types of A, B and C; two hybrid cases of Models (C+A) and (B+A) are taken up according to the application of constant-Q material damping assumption to the rational impedances for rocking and swaying of a surface footing. Following a set of general theories developed in Part I, their dynamic properties are clarified with regard to the same points as in the preceding discussions of Models A and C. More serious appearence of the singularities involved in Model A features the results obtained in these examinations. The third phase of this study is an investigation of the dynamics of overall systems represented by the total combination of Models A, B and C which are applied segmentally. Along the foregoing lines of reasoning, formulation of building-foundation-soil interaction is the first concern therein. Then example analyses are done by use of a bare-minimum reduction of superstructure, with a view to identifying the basic mathematical structure in their nonelementary response behaviour. The latter half of this presentation is intended to provide preliminary remarks for the subsequent discussions of the third phase. This is primarily concerned with the aspect of formulation, and includes reference data on the transfer-function relationships in frequency domain.
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KAZUO KONDOH
Article type: Article
1981 Volume 304 Pages
31-40
Published: June 30, 1981
Released on J-STAGE: August 22, 2017
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The purpose of present study is to develope a new beam-column model based on modified complementary energy principle, considering the validity of the force method for the problem of material non-linearity. As its first report, a new plane beam-column model for elasto-plastic and collapse analysis is proposed in this paper. This model satisfies completely both equilibrium and compatibility conditions for any states of stiffness distribution and load, namely has no discretizing error. Therefore, if the evaluation of stiffness and energy integration are accurately carried out, the exact solutions can be gained in every range. Also, application of the plastic hinge method to this modelcan be simply put in operation by the Lagrange multiplier. A series of analysis have duly proved that this model might be very powerful for the problem of material nonlinearity.
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Ikuo TOKUHIRO, Akio SASAKI
Article type: Article
1981 Volume 304 Pages
41-50
Published: June 30, 1981
Released on J-STAGE: August 22, 2017
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HIROMASA KAWAI, HATSUO ISHIZAKI
Article type: Article
1981 Volume 304 Pages
51-59
Published: June 30, 1981
Released on J-STAGE: August 22, 2017
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The variation of characteristics of pressure fluctuations on the windward face was investigated in the light of the wind tunnel experiment. The results were compared with the quasi-static theory and the rapid distortion theory. The following results were found from the experiment. (1) The power spectra of the pressure fluctuation at the stagnation point were little varied with the angle of attack. (2) The power spectra at other points were remarkably varied with the the angle of attack. On the one hand, the spectra at the windward points from the stagnation one were much larger than those at the stagnation one as the angle of attack increasing. On the other hand, the spectra at the downward points were smaller than those at the stagnation one in the low frequency range. (3) The power spectra at the downward points were approaching to those of the quasi-static theory as the frequency reducing. However, those at the windward points were much larger than those of the quasi-static theory in the low frequency range. The discrepancy might be caused by the assumption in the theory that the longtudinal velocity fluctation had no relation with the lateral velocity fluctuation. (4) The axiel scale of the pressure fluctuation along the center line of the windward face was increasing as the angle of attack increasing. The magnification factor of the scale with the angle of attack was much affected by the scale of the free stream turbulence. As the turbulent scale decreasing, the factor was increasing. (5) The characteristics of the pressure fluctuations were convected from the stagnation point to downward. The convection velocity was largest at 0° angle of attack, and decreasing as the angle of attack increasing. At the angle of attack more than 20°, the convection velocity was little changed and was almost same as the free stream velocity. (6) The tortional vibration of the structure due to the turbulence was about half of the bending vibration. This tortional vibration was increased about 10% due to the convection of the pressure fluctuation.
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KANSHI MASUDA, KAZUHIDE KUTANI, KENJI SAIKI
Article type: Article
1981 Volume 304 Pages
61-71
Published: June 30, 1981
Released on J-STAGE: August 22, 2017
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The purpose of this study is to trace quantitatively the stress distribution and deformation characteristics of the column base connections by using "Theory of Beams" & "Finite Element Method" on elastic foundations, and is to compare their analytical values with the experimental results and discuss. This paper reports an outline of their experiments and analyses. The main results derived from these investigations are as following : (1) The analytical values of the rising amount of the base plate are in good accordances comparatively with the experimental results in either case, but the analytical values of the sinking amount of the base plate in compression side are slightly greater than the experimental results. (2) In the estimate of a degree of fixity in column bases, it may be considered that the relations between M/P and φ/P are presented nearly by the Bi-Linear type which is changed the slope at the point of the eccentricity to occur first the tensile stress in anchor bolts.
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KAZUTAKA ABE, KENGO TAGAWA, MASAMI SAKAI
Article type: Article
1981 Volume 304 Pages
73-79
Published: June 30, 1981
Released on J-STAGE: August 22, 2017
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Elastic-plastic ultimate strengthes of gable typed rigid frames were examined against the symmetrically distributed vertical loads using the elastic-plastic buckling analysis method. As the result of parametric study about various gable typed frames, we obtained the criterion of necessary slenderness ratio of frames to prevent the elastic-plastic asymmetrical buckling preceding the mechanism by simple plastic theory.
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SHIRO KATO, MASARU MURATA, OSAMU MATSUOKA, ATSUNORI MIYAMURA
Article type: Article
1981 Volume 304 Pages
81-90
Published: June 30, 1981
Released on J-STAGE: August 22, 2017
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The present paper follows the author's preceding two papers on axisymmetric static, dynamic and astatic buckling of clamped spherical caps due to a uniform step load. The analysis is based on the finite element method and mode superposition method. This method avoids the direct finite element methods of nonlinear effects and also takes an advantage of the importance that a structural response is fundamentally due to several basic vibration modes. The in-plane displacements which satisfy the tangential equilibrium equations are obtained compatible with the normal displacements which are, alone, assumed by eigen vectors. The governing equation is composed of a set of algebraic cubic polynominal equations in terms of the generalized displacements. The coefficients in the equations for a shell with an initial imperfection are obtained through a simple manupilation of those for the perfect shell and the coefficient in Fourier expansion of the imperfection. The conclusions from the present analysis are as follows. (a) The dynamic buckling load is severely reduced by asymmetric imperfections, reaching to one-fifth of the classical static buckling load in case of λ=7 and ω_i/t=0.30. (b) Asymmetric imperfections have the same effects as the symmetric imperfections if the magnitude ω_i/t is greater than around 0.2. (c) The dynamic buckling mechanism is classified approximately into three types. (1) Direct snap through buckling. (2) Bifurcating dynamic buckling into asymmetric deformation, with a complete snap through to a reversed shape. (3) Bifurcating dynamic buckling into asymmetric deformation without snapping to a reversed shape.
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NAOTSUNE TAGA, YUTAKA TOGASHI
Article type: Article
1981 Volume 304 Pages
91-101
Published: June 30, 1981
Released on J-STAGE: August 22, 2017
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How to estimate the complex configuration is an important problem on the investigation of dynamic properties of a soil layer composed of composite media. The complex configuration of composite media is spatially averaged in the domain of the media in order to idealize the media. Three method of averaging have been proposed up to date. Especially in the equivalent mixture method, dynamic properties of the complex configuration are obtained analytically with relative ease. Namely it is possible to represent composite media by mixture media. But composite media with the complex configuration are not replaced by mixture media. In this paper, the replacement of composite media by mixture media is studied, and the representation of the wave propagation in the soil layer composed of composite media is given. A procedure of this research is as follows. The fundamental equation of the field problem of monophase media and multi-phase media is represented briefly in Chapter 2 and 3. A new method is proposed by combining Finite Element Method with the composite mechanics in Chapter 4 and 5. The phenomenon of the wave propagation is described for a soil layer such as an alternated layer and a pile reinforced ground, in the latter half of Chapter 5. In Chaper 6, the dispersion relation for composite media is used as the constitutive relation when frequency responses are analysed. Composite media herein are composed of two phase materials which are of homogeneous, isotropic and linearly elastic.
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Ryuzo OHNO, Masahiro CHATANI, Yoshinori YOSHIHARA, Satoru TAKEISHI, Ta ...
Article type: Article
1981 Volume 304 Pages
103-114
Published: June 30, 1981
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Article type: Bibliography
1981 Volume 304 Pages
111-
Published: June 30, 1981
Released on J-STAGE: August 22, 2017
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NAGANORI YUMOTO, KATSUO ANDO
Article type: Article
1981 Volume 304 Pages
115-122
Published: June 30, 1981
Released on J-STAGE: August 22, 2017
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This paper reports studies on Design proper, not for Design. We study for about 10 years, on the framework and the method of Design through the Design Process and System. We show the range of Design we study, and the differece between our study and other studies on Architectural Design in Japan. We discuss on Architecture and Man as users, clients, designers, maintain-ers and so on. From the point of view of a Designer we distinguish Design in a narrow sense from Design in a wide sense. And studies of Design in a narrow sense is situated onground of researches on Architectural Design. From our point of view of Design, we regard the Design Science as the Science of the Artifitial, not Natural Science. And we show our consciousness of the problem, aim, the range, the approach, the method, form of output and input, and development of our study. Finally, with a view to getting aid to gain better Design results by programming Design better, we study Design, especially its mechanism and Design Method to gain better results. Our aim and end is to lead to the theory and technics of the Design Programming.
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MITSUHIKO KAWAKAMI
Article type: Article
1981 Volume 304 Pages
123-130
Published: June 30, 1981
Released on J-STAGE: August 22, 2017
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Residential districts composed mainly of detached houses are one of dominant features in Japanese urban area. Environmental quality for living in these districts is changeable toward the worse in a long time. This is caused by arbitrary building activity of each dwelling unit. Nevertheless we have only insufficient control system to maintain or improve residential quality in these districts. So it is urgent need for us to establish the general control system which deals with these problems. In this study I propose a new control method of land use intensity for these districts. The method uses Lot Utilization Distribution Curve (L. U. D. C.) which is derived from upper and lower numerical level of utilization area for residential dwelling in the region. These levels are determined statistically according to distribution pattern between utilization area and lot area or artificially according to the purpose of its control. L. U. D. C. is applied to urban districts in Kanazawa in this study and those are evaluated as follows. L. U. D. C. is useful as an analytical method because we can grasp main characters of each district and evaluate the effectiveness of the current control level of land use intensity over there by using it. Also L. U. D. C. has possibility to be used for control method of land use intensity. In that case we can know lot area according to control level or control level according to planned lot area through L. U. D. C.. These numerical levels could be used important criteria for control planning of land use intensity.
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SEIROKU OTA
Article type: Article
1981 Volume 304 Pages
131-136
Published: June 30, 1981
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MASAAKI MIYAMOTO
Article type: Article
1981 Volume 304 Pages
137-147
Published: June 30, 1981
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This paper is a study on the actual state of the Educational facilities to be seen in five high schools in Mid-Meiji Era. Here, paying special attention to the relation between circumstances of establishment at each school and composing buildings in each campus, process of campus planning, and composition of each plan or exterior design of main buildings. I make clear that these programs are the formation process of the basic type of higher educational facilities, Contents of this paper are as follows; 1. Circumstances of establishment and process of construction 2. Composition of each campus plan 3. Exterior design of main buildings 4. Conclusion
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SUSUMU HYUGA
Article type: Article
1981 Volume 304 Pages
149-155
Published: June 30, 1981
Released on J-STAGE: August 22, 2017
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