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Article type: Cover
1965 Volume 107 Pages
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Published: January 30, 1965
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Article type: Cover
1965 Volume 107 Pages
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Published: January 30, 1965
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Article type: Index
1965 Volume 107 Pages
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Published: January 30, 1965
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[in Japanese], [in Japanese], YUKO SHIGEKURA, [in Japanese]
Article type: Article
1965 Volume 107 Pages
1-7,85
Published: January 30, 1965
Released on J-STAGE: August 30, 2017
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The authors have studied on the gypsum admixing ratio to cement so as to prevent the shrinkage crack of concrete due to dring. The optimum gupsum admixing radio to cement is 3% by weight, in regardless of the types of cement or gypsum, and the kind of gypsum which showed the best, was gypsum anhydride gained by calcination of the residuum gypsum. On account of the properties more improvement, we prepared the special type cement admixed 5-15 °/wt ground lime stone to the above mentioned cement (SO_s 3°/wt), and tried to use at two building sites. The test concrete used this cement, in comporison with plain concrete, brought about good results of very few cracks. The theoretical expression for cracks creation formulized from measuring values and calculated factors, adapted to a degree with practice. This formura is showed as follow : S/a-(1+k)/E=f here, S=Coefficient of contraction E : Young's modulus k : creep a : Constant, defines by section f=Restrain factor of a building
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Yosio KASAI
Article type: Article
1965 Volume 107 Pages
8-16,85
Published: January 30, 1965
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KIYOO MATSUSHITA, MASANORI IZUMI
Article type: Article
1965 Volume 107 Pages
17-22,85-86
Published: January 30, 1965
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The authers feel that the structural design of a tall building based on the deformation is as important as the design based on the stress and strength. There is a limitation in interstory deflections because of the difficulty of design of details which can follow to a larg deflection, increase of bending moment at the lower columns by vertical loads, producing negative stope restoring force characteristics in the plastic range, and unstable feelings which be given to the people in the building. The limitatation of deflections adopted in this paper is 1/300 of the story height or less than that, and calculation of earthquake responses is made by a digital electronic computer. The limitations are decided based on the allowable deflections of details usually used. Repeating the response calculation, comparison of the maximum deflections obtained with the given limitation, and correction of the values of rigidities, the systems in which the maximum deflections of elastic response to an earthquake or more accod to given values are calculated. It becomes clear that a parabolic rigidity distribution of a building in vertical direction shows preferable results in the response calculation, provided that the earthquake characteristics given to the building are not quite different from those of the E1 Centro and Taft Earthquakes.
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HIROSHI KITAMURA, MIZUO YAMADA
Article type: Article
1965 Volume 107 Pages
23-30,86
Published: January 30, 1965
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In previous report, force equilibrium and equations of deformation about spaced plate have been expressed in form of difference equations, from which relations between stress of chord, deformation and external forces were obtained. If ew neglect lattice element, we will have crossed linear partial difference equation. Then the problem can be numerically solved either by the calculation of simultaneous algebraic equations with many unknowns, or by general methods. To begin with, as these equations are partial difference, it is necessary to express these equations by unknown functions of x-and y-direction respectively when general solutions of homogeneous difference equation are sought, from which we can obtain linear ordinary difference equations. Then by an analysis of difference determinant of equations derived from linear ordinary difference equation with respect to boundary conditions of imple support around edges, we can arrive at solution of obtaining proper values or proper functions by calculation.
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HISASHI TANAKA, KOHICHI TAKANASHI
Article type: Article
1965 Volume 107 Pages
31-36,86
Published: January 30, 1965
Released on J-STAGE: August 30, 2017
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In the previous papers, the stability criterion of perfectly flat plate, made of perfectly elastic-plastic material was discussed. However, from practical viepoint, it is rare that plates are perfectly flat, and the average com pressive stresses of plates under tests can often reach the levels above yielding without losing stability. Therefore, we must now treat ahe stability of the plates with small initial imperfections, which are made of strain-hardening material. In this report, the stability of crusiform column is discussed as an example. It is the equivalent case of the long rectangular plate hinged along one edge and free on the other under uniform compressive stress at the ends. Afer investigating for the uniformly compressed crusiform column to fail by twisting, the following results are obtained; (1) The maximum stress of the compressed crusiform column without initial twisting is the same both in the elastic range and in the plastic range. It is called "elastic critical stress". (2) In the elastic range, the maximum stress of the column with initial twisting is the same as the elastic critical stress, independent of twisting magnitude. (3) In the plastic range, however, the maximum stress of the column with some initial twisting enormously descends as twisting angle increases. It is because of existing of shearing stress in addition to compressive stress. (4) The useful suggestions to design criteria of plastic hinges were obtained by examining the relation between the width-thickness ratio of column's wing and the possible twisting angle until losing stability in the plastic range. Moreover, the meaning of stability criterion and what kind of states of shearing stress to have the most influence on the maximum stress are discussed.
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BEN KATO
Article type: Article
1965 Volume 107 Pages
37-42,87
Published: January 30, 1965
Released on J-STAGE: August 30, 2017
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In the plastic design or in the design of high-rise building based on the dynamie responce in elasto-plastic state, the beams and columns of a structure have to show enough ductility, that is, plate elements of beams or columns should not buckle until they perform adequate plastic deformation. It is important to find the relation between the critical strains and midth-thickness ratios of plate elements in the plastic range. Haaijer and Tanaka had already studied this problem, based on the plastic flow theory. In this paper, a new treatment of this theme was presented. Initial imperfections were assumed to be in-avoidable in actual plates, and on the basis of this assumption, the collapse model of the plate was created and the work theorem was applied to this model. The following formula was obtained for various boundary conditions of plates. const. =(t/b)[numerical formula] The formula was compared with test results founding a fairly good agreement.
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YASUNORI KOIZUMI, KOZUI KYO
Article type: Article
1965 Volume 107 Pages
43-45,87
Published: January 30, 1965
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Soils considered as an engineering materials, in particular with respect to soil dynamics, are so complicated that they do not lend themselves to rigorous mathematical treatment. It is, therefore, to make some simplifying assumptions in order to develope the problem for the engineering purpose. This paper presents a procedure whereby the dynamic soil constants required for the prediction of the behavior of vibration piles may be determined experimentally. The pile-soil system is treated by considering the virtual mass around the pile and soil spring supporting it. By the use of this analogy the spring modulus and virtual mass can be determined by measuring the natural frequencies of the pile, varying the carring mass. Good agreement has been found between the proposed method and measured values.
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MAKOTO ITO, TOHRU OKASHITA, [in Japanese], [in Japanese], [in Japanese ...
Article type: Article
1965 Volume 107 Pages
46-53,87-88
Published: January 30, 1965
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We made studies of the behavior of in-patients in ward units at the Tomobe Psychiatric Hospital (total 614 beds), Ibaraki Prefecture. Purpose of the investigation is for the most part concerned with following up the planning of the experimental ward unit. This paper is a report of the field studies in some ward units. Table-1 shows the rate of occupancy by patients in each room from morning (8 : 00 A. M.) to night (5 : 00 P. M.). [table] A large proportion of patients in Self Care Units stay outdoor in day time. Day space in used by the greater part of the patients in Receiving Unit and Long Term Care Unit. [table] The rate of active behavior and personal contact are high in Self Care Unit, and low in Long Term Care Unit. The result of the research will give guidance on the design of ward units at a psychiatric hospital.
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TAKASHI ADACHI, KEIJIN KAMINO
Article type: Article
1965 Volume 107 Pages
54-59,88
Published: January 30, 1965
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Frome drawings of children abowt their own home spaces, three casic types of the figurative charater are distinguished. They are follows; (1) connection type (or unit type) (2) envelopment type (or out line type) (3) division type (or pattern type) Mainly, connection type is seen among drawings of 2nd grades (of school age) children. It have a relation with attitude to apprehend spaces immediatly with his action itself. Out line type and pattern type are seen among drawings of higher school age children. Both respond to apprehension with basic constitution of the space. The outline type reveales an early stage of the tendency. At the next stage whole space is devided schematically, subject to the basic constitusion.
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YASUHIKO NAGAKURA, YASUO TOGUCHI, TAKENORI IWAKURA, KAZUO NAKAMURA
Article type: Article
1965 Volume 107 Pages
60-67,88
Published: January 30, 1965
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We analized it from different angles how to change for the state of residence, removal rate, content of family pattern or numbers of dwellers or populations per house of public housing estate.
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UZO NISHIYAMA, HIROSHI MIMURA, JUN MIYAKE
Article type: Article
1965 Volume 107 Pages
68-72,88-89
Published: January 30, 1965
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According to the worsely changing condition in the central area, some groups of small enterprises are trying to remove to the new estates in the suburb. This article is a case study on the group of Hardware Wholesale Shops who are preparing to develop their new estate at the fringe of urban area. The results of the inquiry survey to each enterprise show that the ratio of the enterprises who want to participate increases according to the larger scale of the enterprises. This means the new estate will be developed chiefly by the larger class enterprise and there will be remained the large part of small enterprises in the congestion of the central area. Then, the types of removement demand are anlysed as a 3 types. The first is a case of perfect removement which is much seen in the smaller enterprises. The second is a case of a establishing new branch. The third is a case of functional division of additional storage or board of the workers. This type is seen much in the larger group. These different attitudes to the removement vill be a important problem when they want to get rapid effect of group location in the new estate.
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UZO NISHIYAMA, HIROSHI MIMURA, JUN MIYAKE
Article type: Article
1965 Volume 107 Pages
73-78,89
Published: January 30, 1965
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This article is a case study on the group of Hardware Wholesale Shops in Osaka. These wholesale shops have usually three main functional spaces for business, for storage of goods and for dwelling of workers and enterprisers. With the enlargement of the enterprises, they try to expand their spaces, especially the space for goods and workers dwelling. But the way of expanding is different according to the class of enterprises. In the care of medium and small enterprises, at first they try to expand and rebuild the shop to accomodate increasing goods and workers in their own sites. But usually their sites being very small, they must buy or rent other small sites near by. Even in this case, the main shops cannont separate the spaces for business and for goods, moreover they often have even the space for dwelling, The reason is that they deal too small amount but too many kinds of the goods to sale by sample, and that they have only small funds and that they have the demand of the workers management in all the day. But the price of land rises so rapidly in the central area of today's city, and such dispersion of small storages is very unprofittable, and the traffic propbem is becoming more sever, then they want to remove a part of the shop to the urban fringe. This inclination is seen especially in the larger enterprises' class.
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AKIHISA ENDO
Article type: Article
1965 Volume 107 Pages
79-84,89
Published: January 30, 1965
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The Sale and Reception Room of the KAITAKUSHI (completed in 1881) is the first one of works in Japan by J. Conder (Professor at the Imperial Collage of Engineering; 1852-1920, M. R. I. B. A.) and a representative one of occidental buildings in early years of the Era of Meiji. In this paper it is carried on to give of outlines of the texts of J. Conder's thirty-one letters directed to the KAITAKUSHI from the 13th of March in 1878 to the 5th of October in 1880 about the design and the construction of the above building. These letters have been discovered quite recently by the auther and is opened to the public here.
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Article type: Appendix
1965 Volume 107 Pages
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Published: January 30, 1965
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