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Article type: Cover
1979 Volume 286 Pages
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Published: December 30, 1979
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Article type: Cover
1979 Volume 286 Pages
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Published: December 30, 1979
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Article type: Index
1979 Volume 286 Pages
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Published: December 30, 1979
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Article type: Appendix
1979 Volume 286 Pages
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Published: December 30, 1979
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YASUO TANIGAWA, KAZUO YAMADA
Article type: Article
1979 Volume 286 Pages
1-12
Published: December 30, 1979
Released on J-STAGE: August 22, 2017
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The results of the present study are summarized as follows : 1) The statistical distributions of the strength of cement-based composite materials can not be necessarily approximated by Weibull distribution, because the relation between ln (-ln(1-P)) and ln (F) can be generally expressed by a convex curve. Pareto distribution can hardly express the lower and the upper portions of statistical distribution curve. 2) The experimental results can be expressed more exactly by the proposed equation for the statistical distribution of strength than by previous equations, and the statistical properties of the strength of cement-based composite materials can be rationally explained by the proposed equations. 3) The value of β is affected by the type of loading, and the sizes of specimen and aggregate in macroscopic heterogeneous material, but is independent of the other factors. The value of β can be expressed by Eq. (11). 4) The value of parameter related to the quantity of defects in the mortar specimen (θ_m) increases with the increase of the sand-cement ratio (S/C), provided that the value of S/C is smaller than about 2, and can be expressed by Eq. (14). 5) The value of parameter related to the quantity of defects in the concrete specimen (θ_c) decreases with the increasing value of size of aggregate, the decreasing value of size of specimen and the increasing value of volume fraction of coarse aggregate, independently of the shape of specimen and the type of aggregate. These phenomena can be expressed by Eq. (16) and Eq. (17).
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ATSUO TANAKA, ISAO KOKUBO, FUKUJIRO FURUMURA
Article type: Article
1979 Volume 286 Pages
13-21
Published: December 30, 1979
Released on J-STAGE: August 22, 2017
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The benavior of high strength bolted friction joints under high temperature was experimentally investigated. In this investigation four types of test specimen were used, where the ratio of the slip strength of the bolted joints to the yield strength of the jointed parts varied from 0.5 to 1.2, and the total number of the specimens was 70. The joints were subjected to the constant working load which varied from 50 to 95% of the slip load at the testing temperature respectively and the testing temperature was 300℃, 350℃, 400℃, 450℃, and 500℃, The holding time of the working load at high temperature was 1, 3 and 6 hours respectively. After evaluation of test results, following conclusion was obtained. The slip strength of the high strength bolted joint decreases, when it is subjected to the heat over 300℃. The state of this decreasing phenomenon of the slip strength is represented by bilinear line with good accuracy. The decrease of slip strength is considerablly small, when the heating temperature is less than 400℃. But the slip strength decreases violently, when the heating temperature is over 400℃. The constant working load and the heating time do not particurally affect to the decrease of the slip strength. Therefore it is considered that the main reason of this decrease of the slip strength of the heat affected high strength bolted joint depends upon the thermal relaxation of the bolt tension.
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MINORU MAKINO, CHIAKI MATSUI, ISAO MITANI
Article type: Article
1979 Volume 286 Pages
23-28
Published: December 30, 1979
Released on J-STAGE: August 22, 2017
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In this paper, the first, relations between strain at the maximum carrying capacity of the section ε_cr and width-to-thickness ratio of the flange b/f are discussed. And it is shown that the test results were corresponded to the result of the past research on the plate elements. The second, the influences of the parameters (b/f, width-to-thickness ratios of the web D/w, axial load ratios n, material properties of the steel) on the post local bucking behavior are discussed. The summaries are as follows : 1) In the case of b/f√σ_y (σ_y : yield point stress, evaluated in t/cm^2)=13〜15, the load carrying capacity of the sections after flange buckling increases due to strain hardening until web buckling takes place. 2) In the case of b/f√σ_y=26〜30, the load carrying capacity of the sections decreases due to the flange buckling. 3) Three distinct types of the hysteretic behavior are clearly observed from the test results of Series II. The first type shows graduale decrease of the maximum carrying capacity in each cycle of loading. The second type show remarkable decrease of the maximum carrying capacity in each cycle of loading. The last type shows drastic decrease in the maximum carrying capacity at the local buckling takes place. As shown in the table 2, the kind of types depend on the values of b/f, D/w, and n. 4) The decrease in the carrying capacity of high strength steel members is more remarkable than one of the mild steel members.
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KATSUKI TAKIGUCHI, SEIJI KOKUSHO, KATSUMI KOBAYASHI, AKIO ISHIDA, MASA ...
Article type: Article
1979 Volume 286 Pages
29-35
Published: December 30, 1979
Released on J-STAGE: August 22, 2017
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This paper describes the newly developed loading apparatus for experimental studies to clarify the restoring force characteristics of reinforced concrete columns subjected to bi-directional horizontal forces and axial force. The loading method by this apparatus is as follows : 1) The base of column is fixed on the bed of loading apparatus. 2) The axial force is vertically applied by dead weight. 3) Two horizontal forces are applied to the top of column by oil jacks independently each other. In this loading apparatus, the relative three rotational displacements between top and base of column are restrained by the link mechanism, but the two horizontal displacements and vertical displacement are not restrained. Three specimens were tested without axial force, in order to obtain the fundamental data about the restoring force characteristics of reinforced concrete columns to bi-directional horizontal displacements and to examine the effects of the link mechanism on restraining rotational displacements. In this experiment, horizontal, vertical and rotational relative displacements were measured. From these experimental results, it was found that all rotational displacements were negligibly small, but horizontal and vertical displacements were not restrained by the link mechanism at all. Therefore, the loading apparatus developed here was operated properly and was restraining the rotational displacements, as was expected in its design. As a result, it was proved that the experiments of reinforced concrete columns subjected to bi-directional horizontal forces and axial force could be carried out on the clear conditions conveniently.
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GENGO MATSUI, TAKAHISA OGAWA
Article type: Article
1979 Volume 286 Pages
37-43
Published: December 30, 1979
Released on J-STAGE: August 22, 2017
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YUTAKA SEYA, GENGO MATSUI
Article type: Article
1979 Volume 286 Pages
45-53
Published: December 30, 1979
Released on J-STAGE: August 22, 2017
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It is well known that stress concentration occurs around wall openings when they are subjected to shear forces. Until now, almost all investigations have dealt with the normal stress concentration around or at corner of the openings. However, the increase of shear stresses slightly away from the openings have not been precisely examined. Model tests of reinforced concrete walls with openings subjected to shear forces show that large cracks occur in zones where shear stresses increase, and that these cracks cause the failure. In this paper, we propose to solve the problem of shear walls having square or rectangular openings by two dimensional problems in the theory of elasticity. And accuracy of results from the theory is examined by photoelastic experiments. The following results are obtained. In order to design a shear wall with opening, not only the normal stress concentration immediately surrounding the opening but also the increase of shear stresses slightly away from the opening may be considered. The maximum shear stress ratio to the mean shear stress in the framed wall with square opening is 1.4.
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TSUNEO IWASHITA, NAOMI SAKAI
Article type: Article
1979 Volume 286 Pages
55-63
Published: December 30, 1979
Released on J-STAGE: August 22, 2017
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The column footings of the frames with shear walls subjected to incremental lateral load often up-lift from underlying soil, because of the concentration of the load on walls. This paper examines the properties of the frames with shear walls, considering up-lift of column footings and elasto-plastic behavior of all members and of soils. The soil under individual footing is assumed to be a horizontal spring (K_H), and a vertical one (K_V) which can not resist a tension. The analytical technique is based on the displacement method of the stiffness matrix analysis, proposed in part 1. The results of the analyses are summerized as follows. The stiffer the underlying soil is, the more easily occurs the up-lift of the column footing shear wall, which deteriorates greatly the horizontal strength of frames. The yield of the beams occurs earlier than the up-lift for small K_V, but for large K_V this occurs earlier than that. The maximum strength of the frame is about the same value in spit of the stiffness of the soil. Lateral load bearing capacity of shear walls, which are lower stories, does not so deteriorate notwithstanding the up-lift of the footing of walls, and that is greatly influenced by the strength of the soil and of the beams whose one ends are bounded by walls. When the frame touched the maximum strength, lateral load bearing capacity of shear wall with an up-lifted footing is about the same value in any case of K_V.
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TEIZO FUJIWARA
Article type: Article
1979 Volume 286 Pages
65-73
Published: December 30, 1979
Released on J-STAGE: August 22, 2017
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YASUYUKI MIYAKAWA
Article type: Article
1979 Volume 286 Pages
75-82
Published: December 30, 1979
Released on J-STAGE: August 22, 2017
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It is necessary to predict the air temperature distribution easily to calculate the accurate heat loads in large spaces. In this paper, the pattern of air temperature distribution in large spaces was considerd in applying the method in which room air was divided vertically into several air masses, and the rate of imaginary ventilation between ajacent air masses was obtained from a series of model experiments. Furthermore comparing the measured rate of imaginary ventilation in actual buildings with the rate which was calculated by using the formula derived from model experiments, it was found that there was a good agreement between the measured and calculated values.
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MICHIHITO TERAO, TAKASHI SHODA
Article type: Article
1979 Volume 286 Pages
83-92
Published: December 30, 1979
Released on J-STAGE: August 22, 2017
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NOBUSUKE SAKATA, TAKUMASA YOSHIDA, HISAO TOKUYAMA, CHIAKI HARUTA, TORU ...
Article type: Article
1979 Volume 286 Pages
93-99
Published: December 30, 1979
Released on J-STAGE: August 22, 2017
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YOSUKE IGUCHI, KOTARO KISHIDA
Article type: Article
1979 Volume 286 Pages
101-105
Published: December 30, 1979
Released on J-STAGE: August 22, 2017
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A building is constructed by parts and joints. The joints, each other, have the definite relation. In other words, there is a system in these joints. We call it "Joint System". This is consisted of two systems, "Joint Location System" and "Joint Inner System". The former is where the joints in the building are, and the latter is what the relations between parts in a joint are. We studied "Joint Location System" only, by three aims; 1) To make the abstracted symbols which indicates distinctly the principles of "Joint Location System". 2) To make clear the principles of "Joint Location System" using the abstracted symbols. 3) To make the building construction system based on the principle of "Joint Location System". Contents 1. Aim of this study 2. The concept of "Joint Location System" 3. To make the abstracted symbols 4. Analytic method of "Joint Location System" 5. To analyze the buildings 6. To make the building construction system based on the principle of "Joint Location System" 7. Result
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YOSUKE IGUCHI, KIYOTAKE SUZUKI, HIROTAKA ENDO
Article type: Article
1979 Volume 286 Pages
107-112
Published: December 30, 1979
Released on J-STAGE: August 22, 2017
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On industrialized building, panels are the most important and largest quantity parts. But they have many problems. For example wooden panel's problem is "haveing many kinds of parts" and "complicated assemble". So we thought problems of industrialized panel. We looked out the object of development the planning condition. By them, we created the idea the panel is constructed by two sheets. Next, we made clear the principle of the idea, and by the principle we designned the panels, which is suited to the object and the condition. And then we developed the variety of the panel by the method of "Building Construction Method Planning".
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KAICHIRO KURIHARA, SHINJI TOMIE, SADAO UEMATSU, SHINICHIRO KADOYA, SHU ...
Article type: Article
1979 Volume 286 Pages
113-123
Published: December 30, 1979
Released on J-STAGE: August 22, 2017
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This paper describes the number on books and periodicals according to academic fields per year in Japan and the world, as a basic data for the planning of academic libraries. The sources of the investigated data are Japan Books and Periodicals Directory, Japan Reference Books Directory, UNESCO Statistical Yearbook, Ulrich's International Periodicals Directory, and so on. Contents : 1) Number of titles on books and periodicals issued per year in Japan by N.D.C. classes. 2) Number of titles on books and periodicals issued per year in the world by D.D.C. or U.D.C. classes. 3) Tendency of increase of the issues in Japan. 4) Tendency of increase of the issues in the world.
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MASAKI KATAOKA
Article type: Article
1979 Volume 286 Pages
125-135
Published: December 30, 1979
Released on J-STAGE: August 22, 2017
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We researched the general houses (not the public house) newly built, extended, and rebuilt specially for the handicapped (= the wheelchair user). The purpose of this report is to make some proposals for improving their housing conditions. The results are as follows; (1) The space in the first floor where a wheelchair is able to drive about is from 66m^2 to 99m^2, which occupies about 70 per cent in the newly built and about 50 per cent in the extended or rebuilt house. (2) The rooms, which are secured preferentially for driving a wheelchair, are a sleeping room [P] for the handicapped, a W.C. [C] and a bath room [B]. In addition to those rooms, as the space for driving a wheelchair, in the newly built house a living room and a dinning room, and in the extended or rebuilt house a dinning kitchen are secured. (3) There seems to be three types in connecting [P] with [C] and [B] : 1) Non-Passing (through the other room) Type, 2) Partially Passing Type, and 3) Passing Type. (4) In case of the Non-Passing Type, it is important to place [P] close to [C] and [B]. This type is suitable for the household with the seriously handicapped, for example <WD>(wheelchair depended), and it promotes the independence of the handicapped. (5) The Passing Type is unsuitable to hold privacy of the passed room. As any private room should not be passed, it tends to pass through a living room or a dining kitchen. This type helps the handicapped sit in a home circle with their family. And it is useful when the handicapped is a husband or a wife. (6) The Partially Passing Type comes to the intermediate between the Non-Passing Type and the Passing Type. But this type has the common interests to the latter about privacy.
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CHEIN-ELL HUANG
Article type: Article
1979 Volume 286 Pages
137-145
Published: December 30, 1979
Released on J-STAGE: August 22, 2017
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Since the industrial revolution the society has derived from agriculture to industy facilitated, the population converted from country to city. Hence various city problem areoccured, the transporttion is one of the worst. Up to now, it has been improved mainly in the mass of transportation versus time spent in transportation. This phenomena shortens the distance but it lessens the relatios of passanger's closs related neighborhood. In other words, the problem is resolved in long term transportation distance and mass transportion, but the short distance (1km〜6km) transportation problem is neglected. In order to solve this problem, the time spen in transportation in TOKYO city was investigated, the relationship among transpotation method, time and space were discussed. Further the transportation ranges of transportation method and the relationship of daily living distance and transportation range were discussed. Finally the transportation ranges and it problem were studied. This study are followings 1. Introduction. 2. Method of study. 3. The analysis of public transportation. 4. The relationsship among transportation method, time and space. 5. The transportation range. 6. Conclusion.
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SHIGEWO KAWAMOTO
Article type: Article
1979 Volume 286 Pages
147-154
Published: December 30, 1979
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Contents : 1. Tosanjoden in the early and middle Heian period. 2. Fujiwara Morozane and Tosanjoden. 3. Fujiwara Tadazane and Tosanjoden. 4. The Hogen Insurrection and Tosanjoden. 5. The fire of Tosanjoden and the construction of Kan' in. 6. Summary.
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KENICHIRO HIDAKA
Article type: Article
1979 Volume 286 Pages
155-164
Published: December 30, 1979
Released on J-STAGE: August 22, 2017
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