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Article type: Cover
1980 Volume 293 Pages
Cover1-
Published: July 30, 1980
Released on J-STAGE: August 22, 2017
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Article type: Cover
1980 Volume 293 Pages
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Published: July 30, 1980
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Article type: Index
1980 Volume 293 Pages
Toc1-
Published: July 30, 1980
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Article type: Appendix
1980 Volume 293 Pages
App1-
Published: July 30, 1980
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TOYOKAZU SHIIRE, SHIGEO CHINO
Article type: Article
1980 Volume 293 Pages
1-10
Published: July 30, 1980
Released on J-STAGE: August 22, 2017
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In the present investigation, the primary hydration process of the cement concrete was studied by means of measuring the temperature of the core portion of the neat cement specimen. According to the above results, we considered the influence of the temperature on the set and the hardening of the cement concrete. The results of the present investigation have been interpreted as showing that the set and the hardening of the cement concrete are especially dependent on the curing temperature, among the temperature of cement, the mixing temperature and the curing temperature, and are impeded, when the mixing temperature or the temperature during the soculled dormant period of the cement hydration is higher.
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KENJI KUROHA, MITSUTAKA HAYAKAWA, YASURO ITOH
Article type: Article
1980 Volume 293 Pages
11-19
Published: July 30, 1980
Released on J-STAGE: August 22, 2017
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The purpose of this paper is to investigate the fluidity and other properties of grout in the vacuum prepacked concrete. The authors have presented the new relative fluidity test in the previous paper (part 1. fundamental theories related to flow properties of grout). They studied the influence of several factors on the fluidity by the new test and at the same time bleeding, segregation and strength. The factors studied here are mix proportion, water content and grading of sand, water reducing agent and aluminum powder, mixing time and method. As the relative fluidity test enables to obtain relative shear stress yielding value (F_0), relative flow viscosity coefficient (λ), and relative closure coefficient (⊿F_0), the influence of these factors on the fluidity became clearer. And it was also made clear that other properties were influenced by these factors greatly.
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HIDENORI ONO, HARUO SHIBASAKI, SEISHI KAWAMURA, MAKOTO YOSHIOKA
Article type: Article
1980 Volume 293 Pages
21-28
Published: July 30, 1980
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 floor. On inquiring survey of athletes' sense of shock absorbing effect of actural judojyo floors, it was certified that athletes had been equally concious of differences on shock absorbing effect in actural judojyo floors. Then characteristic examples of judojyo floors could be selected from the viewpoint of athletes sense of shock absorbing effect. Then the characteristics of dynamic loads applied to judojyo floors by athletes was defined on experimental studies. And the dynamic loads applied to judojyo floors by athletes could be converted into loads by mechanical loading system which consisted of a free dropping weight and rubber spring on experimental studies.
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GI HONG
Article type: Article
1980 Volume 293 Pages
29-34
Published: July 30, 1980
Released on J-STAGE: August 22, 2017
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In Part I, new analytical method is presented for the estimation of probability distribution of dissipated energy. In this paper, probability distribution of power spectrum in bedrock to occure in T_f years in TOKYO and KYOTO are derived and a statistical values of hysteretic energy dissipation to require in T_f years in TOKYO and KYOTO are obtained.
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OSAMU MATSUOKA, KAEKO YAHATA
Article type: Article
1980 Volume 293 Pages
35-44
Published: July 30, 1980
Released on J-STAGE: August 22, 2017
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The purpose of this paper is to investigate the semi-infinite elastic medium subjected to a vertical harmonic point force in its interior. It may be called dynamic Mindlin problem (I). In the method to analyze it, the basic solutions which have been derived and studied in our previous paper (part I) are used. They are fundamental solutions and potentials for a three dimensional homogeneous, isotropic, elastic medium. In order to examine the resulting solution, next two discussions are done. One is that the solution coincides with dynamic Boussinesq solution when a point force moves from the interior position of the medium to the origin on the free surface of it. The other that is the solution coincides with static Mindlin solution, being wellknown, in the limit when the circular frequency ω, involving in the solution, approaches zero. Displacement curves of U_z and changes of its phases for two cases such as the positions of a point force, 0.6 and 2.0, can be given by integrating the solution numerically, and they are drawn in Fig.1, Fig.2, Fig.3 and Fig.4. The results observed from these figures are discussed. The resulting solution is expressed as the sum of terms of potentials and fundamental solutions. Comparing the value of fundamental solutions with that of potentials, the former are very greater than the latter. It may be concluded from some considerations based on the comparison that the fundamental solutions represent the resulting solution approximately under a certain condition.
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Kiyoshi Muto, Hiromoto Takase
Article type: Article
1980 Volume 293 Pages
45-56
Published: July 30, 1980
Released on J-STAGE: August 22, 2017
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A numerical method is discussed for analyzing non-linear dynamic response of columns consisting of stacked block elements. In this report (Part I), a series of columns placed in a vertical plane with boundary structures is considered for the analytical model. Each column is formed by a series of stacked elements constrained by some mechanisms which restrict the relative horizontal and vertical movements but allow the rocking motion between elements. Theoretical equations are derived from the principle of conservation of translational and rotaional momenta for each block motion, furthermore collision theory based on a coefficient of restitution is applied for the horizontal collision between adjacent blocks. By using these a equations, computer code "COLLAN2V" has been developed by selecting appropriate numerical methods through parametric study. To show the feasibility of the code, presented are several simple examples such as frequency response of a 10-stacked column surrounded by walls.
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KOICHI SHIBATA, MASUO KADO
Article type: Article
1980 Volume 293 Pages
57-68
Published: July 30, 1980
Released on J-STAGE: August 22, 2017
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In this paper we can obtain the equivalent mass of grain and powder in silo from vibrational analysis and experiment. We can observe the flowing pattern of moving grain and powder, and obtain the damping constant with respect to the specimen of silo.
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Norio ABEKI, Ichiro FUJIMOTO, Kohei KOIKE, Shuji WATANABE
Article type: Article
1980 Volume 293 Pages
69-83
Published: July 30, 1980
Released on J-STAGE: August 22, 2017
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This paper describes experimental results of reinforced concrete shear walls with a opening. Testing models consist of three series M-I, M-II and M-III, Each of them has the different experimental subject. The series of M-I was tested for the evaluations of the reduction in the stiffness and in the strength of the wall models which have one opening but different in scale, and M-II series with one and the same scale opening for the evaluation of the effects of the diagonal reinforcements on the edge of opening. M-III series was tested for the evaluation of the effects of the amount of shear reinforcements in walls. The results from these tests are summarised as follows. (1) In spite of various type of models, all skelton curves of them have a transitional peculiar point on log-log coordinantes and the points have nearly the same values of τ/F_c and R=δ/h. It is evaluated that τ/F_c≒0.08〜0.1 and R≒0.7〜0.8×10^<-3> radian. At the state under load corresponded to those poinst, all cracks on the wall have still hair-breadth. (2) Both reinforcements with diagonal bars and with the steel plate on the edges around the opening were unable to contribute to increasing the initial strength. But diagonal reinforcements take effect for the control of diagonal tension crack caused by stress concentration at the corners and the steel plate around opening is useful to keep the surrounding area of opening having no crack until final. (3) Ultimate failure of wall is not caused by the stress concentration around opening but by the distributed shear stress at both sides of opening. Therefore, the increase of shear reinforcements, a_w・σ_y, make linearly the ultimate strength of wall raise. (4) A large amount of shear reinforcements, that is, double arrangement with closed spacing bars in wall are useful to keep the core concrete of the wall from failure. (5) Our experimental results of the walls with considerably high shear reinforcement show slightly lower strength as usual, concerning the lowering ratio of ultimate strength of walls depend upon the increase of opening area.
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Masanori SHUKUYA, Kenichi KIMURA
Article type: Article
1980 Volume 293 Pages
85-95
Published: July 30, 1980
Released on J-STAGE: August 22, 2017
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TADAHISA KATAYAMA, SHIGERU GOTOH, HIROSHI HORI
Article type: Article
1980 Volume 293 Pages
97-104
Published: July 30, 1980
Released on J-STAGE: August 22, 2017
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This paper describes the structures of turbulent boundary layers on the wind tunnel rough surfaces which are regularly arranged with simple roughness elements. The followings are the outlines of our experiments; The identities of turbulent Reynolds Number (U_z/K_z) and the ratio of representative length and roughness parameter (L/z_0) are confirmed on the geometrically similar rough surfaces. The turbulent structures such as mixing length, energy dissipation and so on become similar, and the formula of reduced scale free stream U_<∞M>/U_<∞N>=(ε_M/ε_N)^<1/3>(L_M/L_N)^<1/3> is formed at the both cases of U_∞=constant and U_∞∝L^<1/3> on the reduced scale rough surfaces. The profiles of mean velocity and turbulent intensity in our tests are similar to those of field observations in surface layer at Tokyo. From the results of this experiments, it can be said that the small tunnels in this use are valid for the studies of wind effects on buildings, if the reduced scale models can be constructed corresponding to the growth of surface boundary layers on the tunnel surface.
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KATSUYUKI YOSHIDA
Article type: Article
1980 Volume 293 Pages
105-115
Published: July 30, 1980
Released on J-STAGE: August 22, 2017
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The Chokuhotai-Bunkatsu-Zu, in Japanese, mean figures which represent how to partition a rectangular prism into some small rectangular prisms. So this is a model of a building which forms of outside view and inside rooms are both rectangular prisms. In planning processes, it is possible to obtain a reasonable outline plan of a rectangular prismatic building by means of allocation of proper floor spaces and heights of each room to proper C. B. Z. which is in match with initial planning conditions. Therefore it is useful to generate with a digital computer to stock these C.B.Z. as far as possible. In this paper a C.B.Z. is put upon 3 dimensional grids and inner partition planes which are put upon each grid plane are not allowed to intersect crosswise one another. As the C.B.Z. is only utilized to the space allocation, generality is not miss on account of this rule. When a number of partition is given, each number of unit of X, Y and Z direction of a grid which includes a C.B.Z. is able to be decided. Surplus partition planes which form the grid are pulled out under the rule of partition plane joints and the grid becomes a C.B.Z. Mirror image and rotation are utilized to eliminate similar patterns. A program which is encoded of this procedure with FORTRAN IV is showed in Figure-6. This is available as a foundation of a total system which is able to generate reasonable outline plans of a building automatically through a digital computer.
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HIROKUNI TANIGUCHI, HIROSHI MORIYASU
Article type: Article
1980 Volume 293 Pages
117-126
Published: July 30, 1980
Released on J-STAGE: August 22, 2017
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This is a study on the patterns and utilizations at entrance space of high-rise housing. Here, survey alcove patterns especially.
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MASAO AOKI, YASUHARU KOUNO, TERUKAZU TAKESHITA, TOSHIRO KITAOKA
Article type: Article
1980 Volume 293 Pages
127-137
Published: July 30, 1980
Released on J-STAGE: August 22, 2017
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The purpose of this study is to suggest the planning guide for babies' (under three years old) room in the nursery school. We have investigated the care by the nurse staff for the babies' activities at five nursery schools. Those schools are known to having most typical babies' room plannings in Japan. The results of this first paper are summerized as follows; 1. The method of nursing babies tends not to be individual but grouped. 2. The main babies' daily activities are divided into two groups; feeding, napping, and playing are the first, and excreting, dressing, and hygiene are the second. The latter activities are inserted into the conversions of the former ones. The daily program which is mapped out by these activities is begun to be assigned since the babies are the second half of 0 year old, and it is able to be carried out without troubles when they become two years old. 3. The daily program in the grouped method is carried out through the care by the nurse staff. 4. Considering the tendency of babies' grouped activities, the care by the nurse staff seems to be necessary particularly at the nursing conversions. The care at the nursing conversions is one of the important factors which decide the babies' room planning.
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ATSUSHI MARUYAMA
Article type: Article
1980 Volume 293 Pages
139-148
Published: July 30, 1980
Released on J-STAGE: August 22, 2017
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Schickhardt was one of Renaissance Architect of 16th-17th century in south-west Germany. There are several projects in his Cityplanning for Freudenstadt, that supported Duke Frederick financial. In this paper I assumed the planning-ages of each projects. Then I picked out Duke's influence and Schickhardt's planning-idea in the development of plans and skeches.
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NOBUHIRO SUZUKI
Article type: Article
1980 Volume 293 Pages
149-154
Published: July 30, 1980
Released on J-STAGE: August 22, 2017
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There are water images which move our mind deeply. Many of these images are aroused by the physical elements of the water space and its environment as influenced by the viewing angle of the observer. 36 water images have been obtained as the representatives of such images. They are classified into 3 categories : 1. the image for the substantial water itself, 2. the image for the water affecting other substances, 3. the image for the water affecting spatial order.
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