Transactions of the Architectural Institute of Japan

[title in Japanese]

Article type: Cover
1970 Volume 173 Pages Cover1-
Published: July 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.173.0_Cover1

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[title in Japanese]

Article type: Cover
1970 Volume 173 Pages Cover2-
Published: July 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.173.0_Cover2

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[title in Japanese]

Article type: Index
1970 Volume 173 Pages Toc1-
Published: July 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.173.0_Toc1

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[title in Japanese]

Article type: Appendix
1970 Volume 173 Pages App1-
Published: July 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.173.0_App1

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SHEAR STRENGTH AND STIFFNESS OF WALL PANEL CONSTRUCTED WITH WOODEN FRAMING AND VARIOUS SHEATHING MATERIALS : Part 1-In Case of Wall Panel without Openings

Hideo SUGIYAMA, Katsuomi SUZUKI

Article type: Article
1970 Volume 173 Pages 1-10,99
Published: July 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.173.0_1

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ELECTROLYSIS AND ELECTROLYTIC POLYMERIZATION OF CONCRETE

REIICHIRO FUKUDA

Article type: Article
1970 Volume 173 Pages 11-16,99
Published: July 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.173.0_11

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Physical properties of concrete were studied, and compressive strength of concrete produced in steel-lead mould was found 10〜20% smaller than mixture strength obtained by JASS 5, 3, 5. This may come from the electrolysis of concrete. and is verified by the fact that chemical constituent of cement paste modified by electrolysis is found on moulds, that the color of concrete is different from that cured in natural conditions, that alkalinity is high on positive pole and low on negative pole as measured with PH meter, and that strength of concrete electrically cured is smaller than that steam cured. Thus admixture is added to concrete for remedying defects due to electrolysis by making electrolytic polymerization to occur in concrete. Thus electrolysed admixture will promptly react with constituents of concrete and become insolube before C_3A of cement is electrolysed, consequently alcalinity of electrically cured concrete becomes higher than concretes cured in natural condition, and the strength of electrically cured concrete becomes amount 10% higher than the mixture strength obtained by JASS. 5. 3. 5.

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STUDIES ON THE STRESS-STRAIN RELATIONSHIP IN COMPRESSION OF CONCRETE AT HIGH TEMPERATURES (No.2)

FUKUJIRO FURUMURA

Article type: Article
1970 Volume 173 Pages 17-24,99-100
Published: July 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.173.0_17

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Concrete specimens were made with standard portland cement, with river sand and gravel or expanded shale aggregate. Specimen A : Mixture C : S : G : 1 : 2.8 : 2.9 water cement ratio : 0.70 Specimen B : Mixture C : S : G : 1 : 1.9 : 2.0 water cement ratio : 0.45 with river sand and gravel Specimen D : Mixture C : S : G : 1 : 2.2 : 1.6 water cement ratio : 0.65 Specimen E : Mixture C : S : G : 1 : 1.3 : 0.85 water cement ratio : 0.40 with expanded shale aggregate Concrete specimens were tested in 5×10cm sizes for compressive strengths, static moduli of elasticity and ect, while heated to elevated temperatures. No loads were applied while temperatures were being raised, the testing being carried out upon reaching prescribed temperature levels. Typical stress-strain curves obtained by using these specimens are shown in Fig. 16 to 19. Test results obtained for four kinds of test specimens (A, B, C, D), compressive strengths, decrease in weight, deformation at rupture and energy of rupture, are shown in Fig. 20 to 23. Regarding compressive strength, 1) reduction is relatively great at 100℃ for both river gravel and expanded shale, 2) at 200 to 300℃ a slight strength incresae is seen, and 3) at 400℃ and higher the strengths drop again with the reduction in the case of expended shale being slightly smaller.

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THE STUDIES ON ULTRASONIC ANGLE BEAM TESTING FOR STEEL WELDING (PART 1) : The Examinations on the Methods for Estimating the Depth of Longer Slit Flaws which Appear on Surface and Botton

TOSHIAKI FUJIMORI

Article type: Article
1970 Volume 173 Pages 25-30,100
Published: July 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.173.0_25

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On this paper we describe the methods for estimating the depth of lager slit flaws which appear on surface and bottom such as longer lack of penetration in root and longer crack which appears on surface and bottom and so on. We analyzed the informations from the depth scan and picked up such seven methods for estimating the depth of that slit flaws as D_<max> method. D_x method, D_e method, D_s method, X_<max> method, X_e method, and X_s method. In testing we used such a probe that the beam angle 45 degrees, the frequency 2 Mhz and the crystal size 20mm×22mm. The general method for estimating the flaw size by the scanning distance (we called D_e method) was not effective to estimate the depth of that slit flaws. X_<max> method which is by using the relations between X_<max> and the depth of flaws was not so effective, too, by that probe. X_<max> varies with the depth of flaws to lager depth by using other angle beams except 45 degrees. So the X_<max> method may be effective to estimate the depth of that slit flaws. X_<max> is the distance from flaws to the probe index in the maximum echo height. We recommend the method by the maximum echo height (we called D_<max> method) for estimating the depth of that slit flaws, in spite of the limitation of estimating the depth. We examined the D_<max> method theoritically.

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AMPLIFICATION OF THE EARTHQUAKE MOTIONS IN MULTI-LAYERED GROUND CAUSED BY MULTIPLE REFRECTION OF SHEAR WAVES

HIROSHI KAGAMI, HIROYOSHI KOBAYASHI

Article type: Article
1970 Volume 173 Pages 31-36,100
Published: July 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.173.0_31

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The earthquake motion on the ground surface relates with subsoil conditions. Authors propose a method of numerical response analisis in time domain of multi-layered ground due to an earthquake, on assumptions that ground responses only caused by a phenomena of shear wave multiple refrection in stratified layers (Eq. (7)). In this analisis the ground is idealized by multi-layered ground on a bedrock. Each layeris parallel and horizontal and has homoginious dynamic properties, and the bedrock is a layer having semi-infinit thickness and through which shear waves enter and disperse during the earthquake. For idarize the ground, it is necessary to decide the layer which can be regarded as the bedrock. K. Kani defines as below. The bedrock is the upper layer which has sufficient thickness and the travel time of shear wave in which is much longer than the time of duration of principal shock of an earthquake. From several analisis using above mentioned method, addition to Kanai's definition, it is concluded that bedrock should be taken for a layer, below which soil dynamic properties are cotiniouse and their difference for depth are little. It is indicated a method for inferential calculations of earthquake movements in layers and incident waves through the bedrock, from an earthquake motion accelerogram (Eq. (9)). Using this method, they calculate incident waves through the bedrock for several cases and show these response spectra in Fig.7〜Fig.14. From these, it is found that their response spectra show the nature of velocity constant compaired with the surface ground motion.

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STUDY ON THE INELASTIC BEHAVIOUR OF COLUMNS OF H-SHAPED CROSS SECTION UNDER BIAXIAL BENDING : Part 1-Method of Elasto-Plastic Analysis

MORIHISA FUJIMOTO, YOSHINORI MATSUMOTO

Article type: Article
1970 Volume 173 Pages 37-47,101
Published: July 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.173.0_37

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A three-demensional space structure is often treated as a collection of two-dimensional planar structure, and the members in a planar frome are designed to resist bending moments acting in the plane of the frame. In an actual building framework, the columns are frequently subjected to bending moments acting in two perpendicular directions in addition to an axial load, which is commonly called biaxial loading. In this paper, an analytical procedure is presented for the determination of the ultimate carrying capacity of columns of H-shaped cross section subjected to biaxial bending. The method of analysis is based on the incremental load procedure. In this paper, the elasto-plastic behaviour of the column subjected to biaxial bending under the constant axial load is also presented, and the effect of the warping restraint at the end cross section on the elasto-plastic behaviour of the column is illustrated.

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Limit Analysis of Beam-Column Connections (X) : Design Method of H-beam-to-H-column Connection

Hisashi TANAKA, Yung Chuan LIN, Akio FUKUSHIMA

Article type: Article
1970 Volume 173 Pages 49-57,101
Published: July 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.173.0_49

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EXPERIMENTAL STUDIES ON THE GLASS-BLOCK FOR DAYLIGHTING (Part-2)

Kunio MATSUURA, Yoshihiro FURUE

Article type: Article
1970 Volume 173 Pages 59-68,101
Published: July 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.173.0_59

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THE NUMBER OF TOILET FIXTURES DEMANDED IN THE NURSING UNIT : Studies in the Functions and Design of Hospitals

MAKOTO ITO

Article type: Article
1970 Volume 173 Pages 69-73,101
Published: July 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.173.0_69

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The estimation of the number of toilet fixtures is discussed here through the investigation of daily activity of in-patients. The results are as follows : (1) Two urinals for men are sufficient to meet demand in each nursing unit including about 50 beds. (2) Three closets are to be provided for both male and female patients in every nursing unit. These are the results of application of the "α method" for cases of Bernovlli Distribution.

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SEASONAL FLUCTUATION OF CONSTRUCTION LABOR (I) : Seasonal Patterns of Number of Construction Workers

RYOICHI SHIMADA

Article type: Article
1970 Volume 173 Pages 75-82,102
Published: July 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.173.0_75

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This paper analyses the seasonal fluctuation of construction labor and compares the seasonal patterns of construction workers by the status of employment. The figure 1 shows the symmetric contrast of the seasonal pattern of construction labor and that of agricultural labor. It suggests the seasonal shifts of labor between the two industries. Farmers are busy with rice transplantation in spring and also with rice-mowing in autumn. From the fact that the number of construction workers decreases and the number of agricultural workers increases in these two seasons, we can conclude that the seasonal pattern of construction labor in Japan are mainly dependent on the seasonal pattern of agricultural production. In winter, some farmers in northern areas can not find any jobs because of the cold and snowy weather and they remove to the southern metropolitan areas as "dekasegi-laborers" where they can get jobs usually in construction industry. The figure 4 shows the difference of seasonal patterns of temporary workers and day-laborers in construction industry and other industries. We can guess that the unique features in the pattern of construction industry are caused by the seasonal fluctuation of the demand for construction works.

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TOKYO OF JAPANESE TOWER (2)

MASAJI HAMASHIMA

Article type: Article
1970 Volume 173 Pages 83-87,102
Published: July 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.173.0_83

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THE AUDIENCE CHAMBERS IN THE IMPERIAL PALACE PLANNED BY J. CONDER (IV)

SHIGEKATSU ONOGI

Article type: Article
1970 Volume 173 Pages 89-96,102
Published: July 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.173.0_89

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J. Conder (1852-1920, M. R. I. B. A.) presented the specification of the foundation work and proposed to use the cement mortar, to employ the iron system for strengthening the Audience Chambers against earthquake in September and October 1882. In the specification of the foundation J. Conder described in detail on the aggregate, mixing, placing, mold, curing in concrete. J. Conder calculated the additional strength imparted by the iron system, the expansion of the iron in the walls, the weight upon the foundations by the addition of the iron works. The iron system advised by J. Conder was theoretical and progressive method in the Meizi era.

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[title in Japanese]

[in Japanese]

Article type: Article
1970 Volume 173 Pages 97-
Published: July 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.173.0_97

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[title in Japanese]

[in Japanese]

Article type: Article
1970 Volume 173 Pages 98-
Published: July 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.173.0_98

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