Transactions of the Architectural Institute of Japan

[title in Japanese]

Article type: Cover
1969 Volume 163 Pages Cover1-
Published: September 30, 1969
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.163.0_Cover1

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[title in Japanese]

Article type: Cover
1969 Volume 163 Pages Cover2-
Published: September 30, 1969
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.163.0_Cover2

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[title in Japanese]

Article type: Appendix
1969 Volume 163 Pages App1-
Published: September 30, 1969
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.163.0_App1

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[title in Japanese]

Article type: Index
1969 Volume 163 Pages Toc1-
Published: September 30, 1969
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.163.0_Toc1

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[title in Japanese]

Article type: Appendix
1969 Volume 163 Pages App2-
Published: September 30, 1969
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.163.0_App2

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EXPERIMENTAL STUDIES ON DIRECT ELECTRIC CURING (Part I)

REIICHIRO FUKUDA

Article type: Article
1969 Volume 163 Pages 1-7,95
Published: September 30, 1969
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.163.0_1

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When hard aggregates are used in fresh and workability concrete, it's compressive strength is decided by its water cement ratio, as has been shown by Abrams. Compressive strength of low water cement ratio of concrete is greater than high water cement ratio of it. But stiff consistency of concrete has been performed with difficulty; workability, consistency, filling of it are worse than soft consistency of concrete. It is generally look for that concrete work is performed by soft consistency of concrete and when it is hardened its physical properties are shown as if it were stiff consistency of concrete. Experimental studies are carried out with the intention of above on concrete producing by direct current. The amount of water removed was 10〜13 percent of all the water used in mixing. This made it possible to improve the water cement ratio as below. W^I/C=0.64W/C+12.3 W^I/C is extractor of water cement ratio. W/C is water cement ratio. Relationship between temperature of concrete and electric current, electric power is below. T=0.95V+8 T=0.17W+26 T is temperature of concrete. V is voltage. W is watt. Coefficient of electro permeability (α) is obtained by reducing the water in concrete equation. α=D/4πη D : Dielectric constant ζ : ζ potential η : viscosity of water. The data shown in Table 4.

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APPLICATION OF THE ESTIMATION METHOD OF INITIAL STRENGTH OF CONCRETE BY AUTHOR TO THE OTHERS' RESULTS

YOSHIO KASAI

Article type: Article
1969 Volume 163 Pages 9-17,95-96
Published: September 30, 1969
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.163.0_9

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In this paper the author deals with the application of the estimation method of early compressive strength of concrete presented in former paper, that is the relation between the properties of author's formula for early concrete and the others' formula for hardened concrete and the application of the author's formula to the experimental resuts by the author's done after the former paper and by the other authors', and it is confirmed that the other authors' formulas are not applicable to the estimation of early strength of concrete. Furthermore, the author's formula is applicable to large extent of early concrete without any compensation. The conclutions are as follows. (1) Deviation of strength by author's method for early concrete is smaller than that by the other anthor's method for hardened concrete. (2) The curves of coefficient N_<20> (coefficient of curing temperature based on 20℃) by author takes place in midway between the curves of Rastrup's hydration formula and D・D method in which the origin of curing temperature is -10℃. (3) The formula for hardend concrete is not applicable to the development of early strength of concrete. (4) The author's method is well applicable to the sixteen the others' experimental resuts on the early strength of concrete. (5) The author's method is applicable to estimate the early strength in large extent of concrete without any compensation of coefficient of formula, for instance, concretes which are used several type of cements, several kinds of admixture, light weight aggregates, crushed stone and different size of sand, and which are varied mixing proportion in large extent.

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EVALUATION OF EARTHQUAKE INTENSITY BASED ON DAMAGE OF WOODEN BUILDINGS

HIROYOSHI KOBAYASHI, SUMIO NAGAHASHI

Article type: Article
1969 Volume 163 Pages 19-28,96
Published: September 30, 1969
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.163.0_19

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From the point of view of structural engineering, a scale of evaluating intensity of earthquake motions is desirable to represent exactly what degree the earthquake motions cause damage to structures. Usually, as this kind of scale, maximum magnitude of acceleration and response spectrum are used, but there were several cases in which little damage to structures are inconsistent with large value of maximum magnitude of acceleration and response spectrum, For example, maximum magnitude of acceleration of the earthquake motions recorded at Kushiro in 1962 is 513 gal, and its response spectrum shows remarkable peak at T=0.33 second (Fig.2), that is, 2.2g for 5 percents damping and 4.8g for 1 percent damping. But little structures suffered damage. Then authors proposed to evaluate intensity of earthquake motions by means of another kind of scale, that is, damage ratio of wooden buildings due to earthquake motions. Damage to a wooden building is defined by elasto-plastic response of one mass system due to earthquake motions, and damage ratio is the total of damage to each group of structures (the structures of a group are different in the period from those of other groups), and is represented by idealised normal distribution curve in relation to maximum magnitude of acceleration of earthquake motions. Here, eartquake motions are used by modifying geometrically the acceleration amplitudes of the of the recorded earthquake motins, so the fhe frequency characteristics are not changed. By this scale, the intensity of the earthquake motions whose response spectrum has a remarkable peak, for instance, the above-mentioned earthquake motions at Kushiro, is not so large even for structure of the peak period, and is rather small for structure of other period. On the other hand, the intensity of the earthquake motions whose response spectrum has several peaks is generally large.

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ELASTIC ANALYSIS OF SHEAR WALLS LOADED SYMMETRICALLY WITH REGARD TO THEIR LONGITUDINAL AND TRANSVERSAL CENTER LINES PART II : Equations for Conditions which are Necessary to Define the Unknown Coefficients, and Numerical Results of an Example

MASAHIDE TOMII, IKUO TOKUHIRO

Article type: Article
1969 Volume 163 Pages 29-40,96
Published: September 30, 1969
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.163.0_29

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LIMIT ANALYSIS OF BEAM-COLUMN CONNECTIONS (V) : Connections of Box-Column to Wide-flange Beam Subjected to Anti-symmetrical Bending

HISASHI TANAKA, TSUNEO SHIGENOBU

Article type: Article
1969 Volume 163 Pages 41-50,96
Published: September 30, 1969
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.163.0_41

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STUDIES ON THE METHOD TO MEASURE AND JUDGE THE DENSITY OF BUILDINGS : (Part II) Actual Measuremnts of Sky-Factors at Tokyo, Nagoya and Osaka and Considerations on Density

MASAAKI TAKEI

Article type: Article
1969 Volume 163 Pages 51-61,97
Published: September 30, 1969
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.163.0_51

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By the method shown in Part I, we actually measured sky-factors at main districts in Tokyo, Nagoya and Osaka and investigated the densities at the districts and considered inferior limits of desirable densities there, classifying skyfactors densities in grades. We calculated the densities of several cities at the time when the buildings will be constructed to the utmost limit under the Building Act. This calculation shows that both Nagoya and Osaka will have much worse conditions in density of building than today and also after being appointed as "bulk-district" probably their densities will be higer than Tokyo. Therefore, when the bulk regulation is to be enforced, the regulations on coverage and set-back of building line should be carefully considered at the same time.

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A STUDY ON WORKER OF CONSTRUCTION INDUSTRY (No.2) : Distribution of worker and specific character of workers' market

YUKIYASU NAKAMURA

Article type: Article
1969 Volume 163 Pages 63-75,97
Published: September 30, 1969
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.163.0_63

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AN ANALYTICAL SURVEY OF THE FOUR-ROOMED FARM HOUSES CENTRED AROUND OSAKA PREFECTURE/ITS TRANDITION AND CHARACTERISTICS

MASANORI HAYASHINO

Article type: Article
1969 Volume 163 Pages 77-86,97
Published: September 30, 1969
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.163.0_77

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THE STUDY OF THE RECEPTION ROOMS IN THE PROVISIONAL IMPERIAL PALACE DESIGNED BY C. DE BOINVILLE (Part 1)

SHIGEKATSU ONOGI

Article type: Article
1969 Volume 163 Pages 87-93,97
Published: September 30, 1969
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.163.0_87

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A building used as the reception rooms in the provisional Imperial Palace, Akasaka, Tokyo, was designed by C. de Boinville, an architect of the KOBUSHO (The Department of Public Works). It was the first European style's buildings built for the Japanese Court and the construction was started in September 1876. But the construction was discontinued because of a damage by an earthquake in March 1879. This study intends to give the entire picture of this building on the basis of a lot of records. In the present paper details of the progress after the first planning are described.

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