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Article type: Cover
1975 Volume 227 Pages
Cover1-
Published: January 30, 1975
Released on J-STAGE: August 22, 2017
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Article type: Cover
1975 Volume 227 Pages
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Published: January 30, 1975
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Article type: Index
1975 Volume 227 Pages
Toc1-
Published: January 30, 1975
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Article type: Appendix
1975 Volume 227 Pages
App1-
Published: January 30, 1975
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HIDENORI ONO, MAKOTO YOSHIOKA
Article type: Article
1975 Volume 227 Pages
1-11,129
Published: January 30, 1975
Released on J-STAGE: August 22, 2017
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The main purpose of this paper is to relate the scale of the athlete's sense to the physical value measured with the apparatus for measuring the resiliency of gymnasium floor. The result are as follows. 1. We could relate the scale of the athlete's sense on resiliency of gymnasium floor to the deflection evergy, the efficiency of vibration damping and the stability of the deflection of the model floor being obtained from the dynamic load-time curves and defletion-time curves of model floors which is measured with the apparatus for measuring the resiliency of gymnasium floor. 2. We could obtain the equation for estimating the resiliency of gymnasium floor using the deflection energy, the efficiency of vibration damping and the stability of the deflection. 3. We could indicate the most suitable physical value of resiliency of gymnasium floor.
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IKUO YAMAGUCHI, TOSHISADA ARAKI
Article type: Article
1975 Volume 227 Pages
13-23,129
Published: January 30, 1975
Released on J-STAGE: August 22, 2017
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Because of high stiffness and small ductility in spite of high strength, reinforced concrete shear walls do not always have many advantages in the structural design of buildings. Hence, Deformable shear walls, i. e., walls with high strength, low stiffness and large ductility, have been required. From this background, the authors proposed the Deformable shear walls using the flexible connectors between steel frames and reinforced concrete walls. We carried out the static test up to failure of six wall specimens to examine the general behavior of such Deformable shear walls. Further, based on the test results, we established a system of elastic analysis of tall buildings with Deformable shear walls. For the analysis, frames are analyzed by the slope-deflection method, Deformable connectors are assumed as the springs, and the finite element method is applied to the analysis of the reinforced concrete walls. Comparison between results obtained by the analysis and the experiments proved that this method of analysis is reasonable. Using this method of analysis, we examined the relation among the frames and the Deformable connectors and the walls for the tall buildings, N stories with one bay. It is indicated that for the stiffness and the shear force the Eq.23 and the Eq.24 are in good agreement with those computed by the above method of analysis.
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YUTARO OMOTE, TOSHIKAZU TAKEDA
Article type: Article
1975 Volume 227 Pages
25-37,130
Published: January 30, 1975
Released on J-STAGE: August 22, 2017
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SHINTARO OBA, ISAO TORIUMI
Article type: Article
1975 Volume 227 Pages
39-46,130
Published: January 30, 1975
Released on J-STAGE: August 22, 2017
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This paper attempts to examine the change in dynamic characteristics (natural frequency, equivalent damping constant) of the selected 48 apartment houses of five-storeyed reinforced concrete structure, measuring their micro-tremor in the different phases of construction mainly with respect to the changes corresponding to the size and shape. The measured values are compared with the theoretically computed ones for the rocking vibration of rigid body on an elastic ground. Summary is as follows : 1. Dynamic characteristics of structure become to clear when the condition is fulfilled, that is l_0/b(height/width)≥ and N(story)≥3; when not, the vibration of ground itself is transmitted directly to the structure on account of the greatness of damping degree in ground-structure system. 2. Natural frequency correlates to the size and shape of structure. Measured values become lower when increased the l_0/b, which tendency in general accords with theory. 3. Equivalent damping constant, though showing variation, tends to decrease when increased the l_0/b or decreased the natural frequency of structure. The measured values are, however, comparatively lower than the theoretical ones. 4. Influences of ground upon the dynamic characteristics of structure are plain enough about the natural frequency, which on natural ground shows higher values about 10% than on fill-up ground. However, influences upon equivalent damping constant are not clear.
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SHIRO KATO, MASARU MURATA, OSAMU MATSUOKA
Article type: Article
1975 Volume 227 Pages
47-55,131
Published: January 30, 1975
Released on J-STAGE: August 22, 2017
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The object of the present paper is to formulate the efficient method for nonlinear dynamic analyses of rotational shells by the combined use of the finite element method and the mode superposition method. In the Part 1 of the paper, the formulation of the nonlinear dynamic analyses is presented for the general shells of rotation. The nonlinear equations in the two tangential directions are solved with use of the finite element method and the two tangential displacements u and v are determined as the function of the assumed lateral displacement w. After those procedures, the dynamic nonlinear modal equations are derived. The effects of the geometrical imperfections are taken into consideration. In the Part 2, a shallow spherical cap having a clamped edge subjected to the lateral pressure is analysed for λ=5, 6, 7, 8 and 9 and the results are compared to be in fair agreement with those given by other authers. The shell subjected to the similtaneous dynamical action of auniform pressure and a concentrated load on the apex with various ratio is investigated and the results show the large a mount of reduction of the dynamic buckling load due to a slight concentrated load. The interaction formula for the dynamic buckling of the lateral pressure and the concentrated load is discussed.
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OSAMU MATSUOKA, TOMOYUKI YOKOI
Article type: Article
1975 Volume 227 Pages
57-66,131
Published: January 30, 1975
Released on J-STAGE: August 22, 2017
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By extending a macro polyad to n single-directors, this paper aims at releasing the homogeneous deformation of a macro director polyad space which includes n micro director polyads in the previous paper. A general multi-directed continum is an assemblage of material points which have n single-directors and n' micro director polyads. Mechanics of it is derived from the previous paper (§2) and some special cases are considered (§3). Then several theories associated with the generalized continua are compared with the theory presented here, and they are unifyingly interpreted by expressing the n single-directors field microscopic analytically (§4). Although the basic equations seem ones by Ericksen & Truesdell or Toupin who formulated the theory of n dimensional directed continua, they will contribute to a viewpoint of giving some explicte structures to the director space and of indicating the variety of ideas corresponding to micro structures. Accordingly the present theory will be able to have more extensive applications to actual media. Regularly reticulated framestructres and prismatic shells must be successful models of general multi-directed continua. The most important subject of the remainder is a reasonable reduction of unknown variables against increasing them by the multiplication of the directors.
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MINORU YAMADA, HIROSHI KAWAMURA
Article type: Article
1975 Volume 227 Pages
67-74,132
Published: January 30, 1975
Released on J-STAGE: August 22, 2017
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The aseismic capacity of the steel structures which are composed of rigid frames with and without braces is presented as a figure illustrated in the spase whose coordinates are acceleration response factor, natural period and damping coefficient. This figure shows that it is reasonable that "strength" and "hysteretic damping capacity" are taken to be the earthquake-resisting factor of frames with and without braces respectively. As for the frames without braces, the hysteretic damping capacity is estimated analytically based upon the flexural deformation mechanisms and fatigue characteristics of the structural members and sections composed of plate elements. By applying the hysteretic damping capacity to the steady-state resonacce of the structures subjected to forced sinusoidal ground vibrations, a concrete estimation procedure on the aseismic capacity of rigid steel frames without braces is proposed.
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Morihisa Fujimoto, Akira Wada, Mamoru Iwata, Fumitoshi Nakatani
Article type: Article
1975 Volume 227 Pages
75-90,132
Published: January 30, 1975
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YOSHIMI URANO, OSAMU ISHIHARA
Article type: Article
1975 Volume 227 Pages
91-97,132
Published: January 30, 1975
Released on J-STAGE: August 22, 2017
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There are various studies about heat flow through walls using the analogy between heat conduction and electrical circuits. We also have studied from 1958, single walls using the R-C type electrical analog circuit method as a thermal network method, and from 1969, the fluctuation of room-air temperature and the application of this method to the air conditioning load. Comparison between the value of actual measurement of room-air temperature and cooling load and the thermal network method has produced good results. The purpose of this paper, as of the first report, is to add to the fundamental theory from the application of the thermal network method to the calculation of the unsteady heat load of buildings. (1) Analogy between one dimensional heat conduction and electrical circuits. (2) Description of the thermal network of walls and room, and analysis by 2-P F-matrix method. (3) Study and comparison with the above method and a strict mathematical analysis with regard to the composition of the wall and the effect on errors.
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KAICHIRO KURIHARA, KOZO SHINOZUKA, KYOZO NAKAMURA, [in Japanese]
Article type: Article
1975 Volume 227 Pages
99-106,133
Published: January 30, 1975
Released on J-STAGE: August 22, 2017
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This is the seventh report of the fundamental investigations for the planning of the public library system to community area. The paper chiefly describes, this time, the financial efficiency of the public library services to service areas through the analysis of the relationships between the number of book circulations per capita and their costs. In this analysis we have found the way in which we can choose the best solution of the number of libraries, their adequate locations, and their suitable number of the book collections if we set up a goal to the number of book circulation in the area. In addition a reasonable boundary has been made clear to form a pattern of the service points; full time branch library, part time branch library, or a station of bookmobile system etc, .
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NOBUAKI MORIMOTO
Article type: Article
1975 Volume 227 Pages
107-113,133
Published: January 30, 1975
Released on J-STAGE: August 22, 2017
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This paper is an analysis of management of tenement-houses by private enterprises. The tenement-houses in Japan is lately becomming superannuated, so we have to study for rebuilding at the same time as redevelopment. Up to now, the management of tenement-houses yield a good return. But on this study, I have concluded that, …… (1) In managers of tenement-houses, there are many that live on the returns of rented houses, and that can't save for rebuilding. (So, I call this type "Kuitsbushi-gata") (2) This type had been grown, in early time, when the tenementhouses had been increasing. (3) This type make a rate war between manegers intent, and pull many managers into to the "Kuitsubushi-gata."
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MASAJI HAMASHIMA
Article type: Article
1975 Volume 227 Pages
115-123,133
Published: January 30, 1975
Released on J-STAGE: August 22, 2017
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1. At first the TAHO-tower was built by SAICHYO and KUKAI in the early 9th century, after that was built in every where. But all TAHO-towers remained were built from the late 12th century. 2. At present TAHO-towers remained take unified style, but the original style of TAHO-tower is classified into tow groupes. One, tower of eary SHINGON-sect was named BIRUSHANAHOTO, aimed at putting DAINICHI-Buddha for one's object. Another, the tower of TENDAI-Sect was named TAHOTO, aimed at stalling HOKEKYO for one's object, it seems that it's style was the square tower of tow storeies. And in TENDAI-Sect from the eary 11th century the TAHO-tower that aimed at putting SHAKA and TAHO-Buddhas was built too. 3. After that in TENDAI-Sect the TAHO-tower that put DAINICHI-Buddha was built, and the style TAHO-tower was unified irrespective of TENDAI or SHINGON. The style of TAHO-tower remained was propagated in the eary 11th century at latest. 4. The TAHO-tower fundamentally is different to the storeyed-tower that aims at stalling BUSSHARI for one's object, so the center post of TAHO-tower that do not takes important meaning does not stand on the base but on the ceiling of first storey.
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[in Japanese], [in Japanese]
Article type: Article
1975 Volume 227 Pages
125-126
Published: January 30, 1975
Released on J-STAGE: August 22, 2017
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[in Japanese], [in Japanese]
Article type: Article
1975 Volume 227 Pages
127-128
Published: January 30, 1975
Released on J-STAGE: August 22, 2017
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