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Article type: Cover
1979 Volume 277 Pages
Cover1-
Published: March 28, 1979
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Article type: Cover
1979 Volume 277 Pages
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Published: March 28, 1979
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Article type: Appendix
1979 Volume 277 Pages
App1-
Published: March 28, 1979
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Article type: Index
1979 Volume 277 Pages
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Published: March 28, 1979
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Article type: Appendix
1979 Volume 277 Pages
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Published: March 28, 1979
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YOSHIZO DOBASHI, KOHYA SAKAJIRI
Article type: Article
1979 Volume 277 Pages
1-11
Published: March 28, 1979
Released on J-STAGE: August 22, 2017
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Reinforced concrete slabs varying in span-thickness ratio, steel percentage, effective depth, aspect ratio and edge restraint conditions were tested under load to failure with the result discussed in this report. There it is noted that the ultimate load-bearing capacity of these structures is overall in reasonably close agreement with the Johansen value obtained from the moment resistance in consideration of concrete tensile strength.
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MINORU YAMADA, HIROSHI KAWAMURA
Article type: Article
1979 Volume 277 Pages
13-22
Published: March 28, 1979
Released on J-STAGE: August 22, 2017
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In this paper (Part V), a fundamental new concept of ultimate aseismic structural design is introduced, and its application method is proposed on the basis of the "Resonance-Fatigue-Characteristics" of structural materials and elements discussed on experimentally and analytically in the previous papers (Part I)-(Part IV). The quantitative estimation of ultimate aseismic structural safety is performed by the direct comparison of (General) Resonance-Fatigue-Characteristics of structures (Fig. 10) with Period-Number of Waves-Characteristics of earthquake excitations (Figs. 8, 9), so the index, deterministic value d_s (Eq. 9) or probabilistic value p_s (Eq. 16), is able to be calculated. The purpose of ultimate aseismic structural design is to make such an index maximum.
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SADAYOSHI IGARASHI, KOJI OGAWA
Article type: Article
1979 Volume 277 Pages
23-31
Published: March 28, 1979
Released on J-STAGE: August 22, 2017
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In the previous paper (Part 2) an equivalent continuous System was proposed as a kinematic model for a framed structure and was able to give a reasonable approximation for the story stress responses that are story shear forces, story axial forces, overturning moments and transverse forces on the beams. The purpose of the present paper is to illustrate how to apply the story stress responses to earthquake resistant design on the steel framed structure and on this basis to show that the equivalent continuous system may be a useful kinematic model for aseismic design. This paper proposed "equivalent cross sectional area" as a measure representing the magnitude of those story stress responses which can be regarded as vectors with four components. The equivalent cross sectional area was used to evaluate the maximum stress sustained in each member of the frame during the course of earthquake excitations. Further a method to proportion member according to the equivalent cross sectional area was so devised as to control the distribution of plastic deformations of members throughout the structure. Two example frames were designed according to this method and seismic responses of these frames were investigated. Although the present method is still insufficient to produce uniform plastic deformations in the structure, the results of the analysis indicate that overturning moments and transverse forces on beams are influencing factors and have to be evaluated in the process of seismic response analysis. From this view point the equivalent continuous system, which represents the story stress responses in a multi-dimensional space, can be an useful kinematic model for the aseismic design.
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YOSHIKAZU KITAGAWA, MASAKAZU OZAKI
Article type: Article
1979 Volume 277 Pages
33-43
Published: March 28, 1979
Released on J-STAGE: August 22, 2017
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It is one of the most important problems in earthquake engineering to predict the intensity of future earthquakes from the past available earthquake recording data, as precise earthquake forecasting is difficult in the present stage. The expectancy of maximum earthquake motions in a certain place may be defined by the seismic activity on the base rock and the ground characteristics. In order to clarify this more reliably, it is necessary to investigate the regional distribution or variation of the seismic activity and the characteristics of soil-layers. The expectancy of maximum earthquake motions based on the seismic activity on the base rock by means of Kanai's Formula and Gumbel's Second Asymtotic Distribution was reported in Apr., 1978. This paper deals with the regional distribution of the characteristics of soil-layers in the range of long period (6.0≧T≧2.0sec.) reflecting the deep ground characteristics of fairly large area, using seismic data of strong motion seismographs published by Japan Meteorological Agency. This paper is summarized as follows, (1) The regional distributions of the magnification of soil-layers in the range of long period reflecting the deep ground characteristics are showed in Fig. 6 (a)〜(b) and Appendix II. As a result, the areas where the magnification factor is considered to be high are generally as follows, i) the coast on the Japan Sea in the Tohoku district from the Hokkaido district, ii) the southern area of the Kwanto district from the area of the Kinki district, iii) the southwestern area of the Shikoku district from the Kyushu district. However the above tendency of the regional distribution varies in detail according to the period components of earthquake motions. (2) The relations between the magnitude (M) and the predominant period (T) of earthquake motion (log T=aM+b), and between the maximum amplitude of the vertical and the horizontal components (R_m) are examined. And the regional distributions of coefficients a, b and R_m are indicated in Figs. 11 and Appendix I. From these figures, it is pointedout that the coefficients a, b and R_m are influenced by the soil characteristics as well as the regional distribution of the magnification factor. 3) It is proposed that the expectancy of maximum earthquake motions on the structural base rack with V_s=0.6〜0.8km/sec. can be expressed for the long period (6≥T≤2sec.) as the product of the following three factors i) the expectancy of maximum earthquake motions based on seismic activity on the seismic base rock with V_s=2〜3km/sec., ii) the magnification factor of the standard ground characteristics, and iii) the regional distribution of the quake degree relative to the standard ground. The procedure of estimation in Tokyo is schematically described in Fig. 17. It is necessary to take consideration that the aspect of the final regional distribution of the expectancy of earthquake motions is different from that based on the seismic base rock in following areas, the southern part of the Kinki district, the area from the south-western part of the Kyushu district to the west-southern port of the Shikoku district, the coast area on the Japan Sea in the Tohouk district and so on. In addition, the effects of the soil characteristics in the short period rarge (T≦1.0〜2.0sec.) reflecting the shallow ground characteristics on a small area or the concepiton of the soil profile types should be introduced from the practical point of view.
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YOUICHI MINAKAWA
Article type: Article
1979 Volume 277 Pages
45-54
Published: March 28, 1979
Released on J-STAGE: August 22, 2017
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Nonlinear vibrations which take place in the equations of motion expressed by normal modes are classified into three types here. The method of harmonic balance is applied to analyse periodic solutions of the equations of motion. Then, the nonlinear vibration problems are expressed by algebraic equations which are composed of the Fourier coefficients. The unknowns of the algebraic equations are classified by applying the procedure described in Part 1. Sience the unknowns express the Fourier coefficients that represent nonlinear vibrations, nonlinear vibrations are classified into three types, accompanying type, branching type (1) and branching type (2). Then in order to study the stability of the periodic solutions corresponding to undisturbed motion, a complex eigenvalue problem is derived by applying the method of harmonic balance to the variational equations.
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SUMIO KAWAMURA, EIJI KIMOTO
Article type: Article
1979 Volume 277 Pages
55-61
Published: March 28, 1979
Released on J-STAGE: August 22, 2017
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Basic equations are expressed with physical consideration for flow around roofs. These equations are deduced from velocity potential and oscillations of roofs with initial tension as restoring force considering strong interaction between roofs and flow. Modal approach to oscillations decides total circulation together with velocity condition at trailing edge. Then, roof's oscillation is rewritten as a nonlinear differential equation. A periodic solution is obtained by asymptotic expansion method and the existence of solution and its uniqueness condition are examined. A frequency equation is given from condition that roofs and flow are equal in period of oscillations. Its solutions are decided in different domains depending mainly on wind velocity and roof's weight. Two critical velocities are induced on the basis of total potential energy, which is dependent on wind velocity using the solution of frequency equation. The first is a critical velocity where amplitudes become infinite. The second corresponds to velocity of division between two domain, where oscillations alter modes and enegy at a jump. Accuracies of these velocities are examined. Frequency and damping of structure, especially its weight have maked influence on these velocities. There is not the first critical in case of remarkably heavy roofs. Partly using experimental values, these critical velocities are made to correspond to those which reveal the phenomena.
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KEIICHI NAKATA, KUNIO YAMAGATA
Article type: Article
1979 Volume 277 Pages
63-70
Published: March 28, 1979
Released on J-STAGE: August 22, 2017
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In the west of Osaka city, a number of canals for woods were filled up with earth. On this reclaimed land, many buildings were constructed. Settlements were observed at one of these buildings and 12 ground points around this building. The observed building has 11 stories and the plan 3spans×32spans, whose structure was constructed with reinforced concrete and supported on sandy diluvium. In this paper, results of observed settlements are shown and observed settlements are compared with calculated settlements by equations which introduced in previous paper (part 1). Main conclusions are as follows. 1. A shape of a building settlements were influenced evidently not only loads of a building itself but also loads of earth around a building. 2. Observed settlements are slightly larger than calculated settlements in diluvium. But these twe kinds of settlemnts agree fairly in alluvium. 3. Such as this case that loads of earth and loads of the building overlap, it is effective to use the theory that the coefficient of volume compressibility m_υ and the coefficient of consolidation c_υ are treated to be variables.
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MASAHIRO CHATANI, RYUZO OHNO, MITSURU SUWA
Article type: Article
1979 Volume 277 Pages
71-81
Published: March 28, 1979
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MINORU AKIOKA, MICHIO MIYAKAWA
Article type: Article
1979 Volume 277 Pages
83-89
Published: March 28, 1979
Released on J-STAGE: August 22, 2017
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This paper describes a development of the basic equations of transient room temperature for multi-room expressed by various indicial responses, which are found out by means of making approximat of heat transfer due to the radiation exchange among room surfaces in the linear form for surface temperatures. The number of unknown variables could be reduced from total number of surfaces to the number of rooms. In this Part 1, the heat equilibrium equations for miscellaneous surfaces are set up and the coefficient matrix for all surface temperatures is induced from these equations.
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OKINORI TANIGUCHI
Article type: Article
1979 Volume 277 Pages
91-97
Published: March 28, 1979
Released on J-STAGE: August 22, 2017
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NOBUKO OGAWA, SACHIKO SAITO, KUNIE KAJISHIMA, JUNKO ISHII
Article type: Article
1979 Volume 277 Pages
99-105
Published: March 28, 1979
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This report is the third part of the series study of "The Study on Nursery School Planning". The former two presented the current problems of overlapping activities at nersery schools. Based on these results, we would like to search for the reasosn and to propose a desirable planning system here. We serveyed 4 years old children's activities at 4 nursery schools in Tokyo. We brought a focus especialy in the time from din to nap, because these two activities differ in speed a lot in each child and it makes big confusions. Also, sleeping and eating are the minimum requirements for child's development, so we have to insure proper environment for these activities for each child. In this study, we analized relations between space and activities through tools and furnitures which children and staffs used, they show the conditions objectively and clealy. Our studying methods are ; 1) To comprehend room's functions on the planning 2) To make the inter-relations clear between room and activities 3) To check the time which tools and furnitures are used and how to used 4) To analized the inter-relations between space, tools and furnitures and activities The results we gained are ; 1) It bears a lot of obstacles on staffs and children when a facilities are planed with only nursery rooms and a play room 2) It is very useful to separate the space for nap and din, then a dinningroom must be arranged in connected with a kitchen
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KIMIO TAKANO
Article type: Article
1979 Volume 277 Pages
107-116
Published: March 28, 1979
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This study continues to the proceeding report, PART I. In this study, PART II, I submit the concrete and practical example of story simulation and investigate its method.
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REIJI OBASE
Article type: Article
1979 Volume 277 Pages
117-125
Published: March 28, 1979
Released on J-STAGE: August 22, 2017
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In this study, Iuused the "indicating map" surveys about evaluation of roads in community area; the dwellers indicate on map about "preferable roads" "unpreferable roads" "dangerous roads", and etc. By them Iaaccount for the conflicts between pedestrians and vehicles. (1) Most unpreferable and dangerous roads for dwellers, are collector service roads. (2) In community area, collector service roads have both functions to control traffic volume.
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NORIHISA YOKOUCHI, NOBUO HIRAI
Article type: Article
1979 Volume 277 Pages
127-135
Published: March 28, 1979
Released on J-STAGE: August 22, 2017
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In Japan that possesses about 30, 000 kilometers ccastline, the planning of the ccastal zone use in ocean development is important problem that dominates the future. This paper is described a method of selection of location for residence on the sea, which occupies an important position as a part of ocean development. Composition in this paper is as follows. 1. Examination of valuation items for selection of location. 2. Selection of location by valuation items. 3. The theory of selection of developmental district. 4. Selection of developmental district by valuation items. For the purpose of being established this paper, as positive study, we decided on developmental district for residential facilities on the sea in the city of Numazu that selected by the method of selection.
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NAOKI TANI
Article type: Article
1979 Volume 277 Pages
137-144
Published: March 28, 1979
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MITSUGU KAWAKAMI
Article type: Article
1979 Volume 277 Pages
145-154
Published: March 28, 1979
Released on J-STAGE: August 22, 2017
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In this article, I introjuce the documents for the application of work by a farmer and carpenter in Edo-period, and I declear as follow for the subject. 1) A scales of farm-house are limited by length of beam, when over the limited length, an erector and carpenter had to request a permission of the the governor through an application. 2) We know that a general tendency for the scale and plan of farm-house, and that this scale relate to the erector's abilities to pay the land-tax. 3) A carpenters lives in rural villages are a member of the carpenter's party and they have each the customer's place in same and near villages. There are the rules to aboid many troubles arounda customor's place in their party.
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