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Article type: Cover
1981 Volume 306 Pages
Cover1-
Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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Article type: Cover
1981 Volume 306 Pages
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Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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Article type: Index
1981 Volume 306 Pages
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Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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Article type: Appendix
1981 Volume 306 Pages
App1-
Published: August 30, 1981
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HARUO TAKIZAWA
Article type: Article
1981 Volume 306 Pages
1-10
Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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The final presentation, Part IV, completes the third phase of this study in which the dynamics of building-foundation-soil interaction is investigated with regard to its basic mathematical structure. This follows a consistent formulation of the problem having been given in the latter half of Part III, and employs a shear-beam modelling of superstructure reduced to a bare simplicity. Again, a set of general theories developed in Part I is repeatedly referred to in these examinations. Complicated and nonelementary appearences are first emphasized concerning the poles and associated residues on the complex frequency plane. In particular, an interesting and novel phenomenon of pair-swapping can be pointed out when arranging the poles into the set of complex or real conjugate couples. On the basis of the root-square values of unit impulsive response, dynamic response properties to free-field acceleration are then discussed in detail, which alternatively corresponds to examining the root-mean-square amplitudes of random response under white noise excitations. After clarifying the differing role of specific poles, the results obtained are also interpreted in such elementary points as the Voigt-equivalent and random function characteristics. Absolute acceleration at the base of superstructure is among the matters of primary concern in the latter study.
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HATSUO ISHIZAKI, YOSHIHITO TANIIKE
Article type: Article
1981 Volume 306 Pages
11-20
Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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The purpose of the paper is to investigate the characteristics of the unsteady aerodynamic forces acting on a three dimensional square prism which is sinusoidally oscillated across wind direction with a rocking mode. Wind tunnel experiments were conducted by use of the forced oscillation technique suggested by Bishop and Hassan. The following results were obtained. 1) The unsteady aerodynamic forces acting on an oscillating model showed the non-linear phenomenon with respect to the reduced wind velocity and the oscillating amplitude. 2) The application of the quasi-steady theory to the galloping oscillation is thought to be difficult below the reduced wind velocity of 30. 3) The existence of the locking-in region is observed. The region is expanded according to the increasing wind velocity. 4) The response curves related to the oscillating amplitude and the wind velocity are obtained, which are plotted with the parameters of the mass damping ratios. 5) The experiments by the forced oscillation technique are compared with the free oscillation experiments. The good agreements are observed with the both results.
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AKIO KAWANO, MINORU MAKINO
Article type: Article
1981 Volume 306 Pages
21-30
Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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A shear parameter for a beam element is newly defined. Shear parameters of built-up members are computed under the definition and discussed for the estimation of shear deformation effect. And effective length factors of framed built-up column considered beam-column connection deformation are also discussed in comparison with the current design formula. Some results are : 1) The shear parameters for built-up members formulated herein are available for the estimation of shear deformation effect of members in frame analyses. 2) The differences between effective length factors of framed built-up columns considered beam-column connections and ones neglected beam-column connections are not remarkable in frames with adequately stiffened beam-column connections. 3) The extended alignment charts, which were suggested before, considered shear deformation of members are recommended for the practical design of built-up columns.
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MAMORU KIMURA, HIROSHI SAWADA, KATSUHIKO SAITO
Article type: Article
1981 Volume 306 Pages
31-39
Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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Cyclic loading tests of composite short colunns with the ratio of the shear span equals 1.5 were carried out. The steel sections of specimens were H shapes and cross-H shapes. There were six specimens with three kinds of the ratio of steel area to steel and reinforcement area, SP/(SP+RP), : 30, 60 and 90%. The inelastic hysteretic behavior and the shares of the steel and the reinforcement in sustaining the in tennal force were compared among the three SP/(SP+RP) ratios and following conclusions weve obtained. (1) The area of the hysteresis loops of the column yielded under bending moment increased stabely with the increase of deformation even for the column with SP/(SP+RP)=30%. (2) It is considered that the excess amount of hoops had the effect of maintaining the bending strength of the concrete section. (3) The ratios of internal bending moment sustained by the steel section and the reinforcement section to the external force reached those of respective bending strengths to the external force in the final state of stress. (4) The ratio of internal shear force sustained by the steel section and the reiaforcement section to the external fore was the same as the above flexural behavior in case of the encased H-shaped steel, but was in excess of that in case of the encased cross H-shaped steel. It is considered that the steel web and hoops contributed to take up a part of interral bending moment sustained by the concrete section. (5) The value of internal axial force sustained by the steel shifted from compression to tension with the progress of tension cracks of the concrete.
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SHIGERU MOCHIZUKI
Article type: Article
1981 Volume 306 Pages
40-50
Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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After Tokachioki Earthquake of 1968, the importance of shear walls has been recognized again. The other hand the revision of Japanese Building Code has made it necessary to establish the serviceable design formulas of shear walls. From the foregoing points, the ultimate shear strength of reinforced concrete unit walls relating to the mechanism of shear resistance and failure were formulated. The effects of the ratio of reinforcing bar in wall, the ratio of shear wall and additional axial loading of surrounding frame to the ultimate shear strength were discussed, comparing the theoritical values with the experimental values of 28 specimens of past experiments. The formulas of ultimate shear strength modified by multiple regression analysis coincide fairly well with the values of experiments, of which the multiple correlation coefficient is 0.93. They were shown to be used as the design formulas of reinforced concrete shear walls in realistic structural design.
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GI HONG
Article type: Article
1981 Volume 306 Pages
51-57
Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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This paper describes an analytical method to estimates the probability of safety for two failure mechanism in hysteretic structures, one is accumulated damage failure, anather is first passage failure, and they are compared with the resulted by momte-carlo simulations.
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SHIGERU UCHIDA
Article type: Article
1981 Volume 306 Pages
58-64
Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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In this paper, we examine visual effects of the building inserted in the landscape, standing on the different position. It mainly consists of two experiments (Experiment I, II). In Experiment I, we discuss the sense of largeness, dullness and conspiciousness about the scene which is reproduced by video tape recorder on the 50-in. screen. In that scene the distance from view point to the building changes sequentially (390m-3000m). We get results that the sense of conspiciousness emerges at a long distance, and as the distance grows down the sense of largeness emerges and the sense of dullness emerges in order, and that the distance at which emerges the sense of largeness is related with the building's height. In Experiment II, we use a set of positive transparency and discuss the evaluation of the landscape barriered with the building. As the result of factor analysis, we get two significant factors, may be called "Potency" and "Visual comfortableness". And it is verified that the evaluation varies according to the building's height, even the observer' distance to it is the same.
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MAMORU MATSUMOTO, TAKAYUKI MATSUSHITA
Article type: Article
1981 Volume 306 Pages
65-72
Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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As shown in preceding part of this paper, linealized governing heat and moisture transfer equations do not apply to high humidities in foam concrete plate. This report presents a novel analysis considering the hysteresis effect in moisture content. In first part of this report hysteresis scanning curves of ALC are analyzed based on Everett's independent domain theory. Predicted volues of this model show good agreement with measured valures of the hysteresis scanning curves. The governing heat and moisture equations with allowance of moisture capacity variation on the hysteresis effect are solved with numerical solution and compared with the experimental results in the high humidity range. It is shown that there are large Hysteresis effect. The predicted values of moisture uptake and temperature variation show excelent agreement with the experimental results at high humidity condition. It is concluded that the deviations at the linear model from the experimental results can be explained by considering the sorption hysteresis of material and the hysteresis effect must be considered at high humidity condition for the precise analysis of heat and moisture flow through foam concrete bodies.
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HIDEKI KUBOTA
Article type: Article
1981 Volume 306 Pages
73-80
Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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This paper gives some charts, constructed with the results calculated on the non-isothermal free jets, to estimate the maximum air velocity and temperature difference in occupied space in summer cooling. Based on the analyses using these charts, an optimum set of values (outlet diameter, discharging air velocity and interval between the outlets etc.) is recommended to minimize the discomfort caused by discharged cool air jets.
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HIROSHI YOSHINO, TAKASHI SHODA, SHUZO MURAKAMI
Article type: Article
1981 Volume 306 Pages
81-91
Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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Ventilating performance of various duct systems were examined by the model experiment in the laboratory, the field test in the real apartment house and a theoretical computer simulation. The types of the duct system are as follows. I-type means the duct system which has two horizontal ducts passing through the apartment unit from one exterior wall to another exterior wall, one for intaking the outdoor fresh air, the other for exhausting the indoor polluted air. The outdoor fresh air is intaken by the short vertical duct branched off at the middle of the horizontal duct which passes through the apartment unit. On the other hand, the indoor polluted air is exhausted by the fan and the duct branched off at the middle of the other horizontal duct. T-type means the duct system which has only one horizontal duct passing through the unit for exhausting the indoor air. L-type duct system has one horizontal duct which doesn't pass through the unit but passes through only one side exterior wall for exhausting the indoor air. LL-type duct system has two horizontal ducts passing through the one side exterior wall, one for intaking the outdoor air, another for exhausting the indoor air. The results of the experiments are as follows. (1) I-type duct system is the best one which intakes stably the outdoor fresh air and exhausts stably the indoor air, varing no influenced by the outdoor wind force. (2) T-type is also stable system, if the duct system is equipped in the apartment which is not so air tight. In this case, the outdoor air may be able to come in through the gaps of windows and exteriors. But, if the apartment is air tight enough, it is necessary to install the ventilating air inlet on the exterior wall. (3) L-type duct system doesn't exhaust the indoor air stably when the wind blows onto the wall through which the horizontal duct passes for exhausting the indoor air. If the pressure force of the fan is not superior to the wind pressure, the reverse air flow may occur. (4) LL-type system has the same defect as the L-type system, unless the apartment is perfectly air tight. (5) The diameter of the horizontal duct should be larger than 15cm in the case of I-type and T-type system. The grill at the top of the horizontal duct and the the grease filter at the kitchen hood should be sellected so as to have small pressure loss.
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SEIJI SAWADA
Article type: Article
1981 Volume 306 Pages
92-102
Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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KO TAKAHASHI, SEIJI FUKUDA, YOICHI ITO, TOSHITERU IWAKUMA
Article type: Article
1981 Volume 306 Pages
103-114
Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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This study is made following the reports, "A basic study of community planning (1), (2)". It is the purpose of this study to make clear the composition of regional space through the investigation of the life behavior near the dwelling in the neighbourhood, which is the field of human unity built up by means of direct communication. As the result of the analysis of the relation among the index of life behavior, the place of behavior and its distance from dwelling place, the three steps of range in regional living-the basic unit, the extension range, the boundary range-are found. And, we confirm that these ranges coincide with the field expanse (reported in the preceding paper) of regional human unity built up by means of direct communication.
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HIROHISA NAKADA, HIROSHI DOHI, TAKAHIDE SHIDA
Article type: Article
1981 Volume 306 Pages
115-125
Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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1) Indivisual's knowledge about surroundings tends to increase rapidly on an early stage and to be stabilized in about one month after their arriving. 2) There exists correlation between his cognitive territory and the total route distance he experienced. 3) Places in his dwelling area and his destination are known very early. 4) Edge and landmark (ex. ponds) are known more easily than pass. 5) Therefore, we can hypothesize that an indivisual knows places which have visual distinctivness (ex, edge and landmark) and then organizes the network of streets based on their locations and orientations in relation to the places. 6) There are two types of places evaluated positively. One is pointed out by many people since the place is widely known. The other type is pointed out stationaly by someone who feels to enjoy an exclusive use of the place. 7) People tend to evaluate the place positively by it's visual character and negatively by it's functional character.
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MASAMI KOBAYASHI
Article type: Article
1981 Volume 306 Pages
126-132
Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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To cope with many and simultaneous fires in a wooden city caused by a great earthquake, there are three major strategies which are a) Prevention of fire outbreak, b) Interception of fire spreading, c) Evacuation of inhabitants. In the Japanese metropolitan area of today, evacuation to a safe open space of refuge is the only way to secure the life safety of inhabitants even though they had to walk long distance to get there. But not only for securing the life safety but also for the reduction of material damage, it is desired that fiveshould be suppressed in its earlystage by the trategies of a) and b). And it could be said that the ultimate goal of disaster prevention planning is to reconstruct a city structurally strong in conflagration and make the evacuation planning unnecessary. As a step for attaining this object, a methodology is proposed which at first finds out districts that have no safe open space of refuge within walking distance and then divides them into small blocks that are surrounded with firebreaks and evacuates the inhabitants to the blocks that come to have no fire spreadings there. Seen from the measures to allocate a park of refuge in each block and secure enough open space between wooden houses, the planning for preventing post-earthquake fire damage is no more than the planning for providing comfortable living environment in a city.
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SEIROKU OTA
Article type: Article
1981 Volume 306 Pages
133-137
Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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It is a indication of mistake in Hayashi's thesis
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Yuji Agematsu
Article type: Article
1981 Volume 306 Pages
138-147
Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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Morihisa FUJIMOTO, Fukujiro FURUMURA, Takeo AVE
Article type: Article
1981 Volume 306 Pages
148-156
Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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Morihisa FUJIMOTO, Fukujiro FURUMURA, Takeo AVE
Article type: Article
1981 Volume 306 Pages
157-163
Published: August 30, 1981
Released on J-STAGE: August 22, 2017
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