Transactions of the Architectural Institute of Japan

[title in Japanese]

Article type: Cover
1973 Volume 205 Pages Cover1-
Published: March 30, 1973
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.205.0_Cover1

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[title in Japanese]

Article type: Cover
1973 Volume 205 Pages Cover2-
Published: March 30, 1973
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.205.0_Cover2

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[title in Japanese]

Article type: Index
1973 Volume 205 Pages Toc1-
Published: March 30, 1973
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.205.0_Toc1

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[title in Japanese]

Article type: Appendix
1973 Volume 205 Pages App1-
Published: March 30, 1973
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.205.0_App1

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STUDIES ON ULTRASONIC ANGLE BEAM TESTING FOR STEEL WELDS (PART 5) : Response Charncteristics of Inner Incomplete Penetration

TOSHIAKI FUJIMORI

Article type: Article
1973 Volume 205 Pages 1-10,87
Published: March 30, 1973
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.205.0_1

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In this paper response characteristics of inner incomplete penetration in ultrasonic angle beam testing is described on the basis of results of tests for natural defects. The echo height of inner incomplete penetration varies remarkably according to the angle of refraction. In case of 45 degrees, it ranges from +10 dbs to -30 dbs and in case of 70 degrees, it ranges from +13 dbs to -6 dbs compared with 4×4 drill hole of NDI-STB-A 2. Therefore when the thick plate is detected, the probe of 70 degrees must be use jointly with the probe of 45 degrees. Many sorts of methods for estimating the sizes of defects of steel welds are arranged and classified and 6 methods which are available for estimating the length of the natural defects of steel welds are proposed. Distance amplitude characteristics of inner incomplete penetration is unique and defferent from the characteristics of 4×4 drill hole of NDI-STB-A 2.

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STUDY ON WOODEN I AND BOX BEAMS

KAZUO GOTOH, NOBUHIKO OTAKI, ICHIRO ABE

Article type: Article
1973 Volume 205 Pages 11-21,87
Published: March 30, 1973
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.205.0_11

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This report is experimental tests on I and Box beams and mechanical analyses on them. The experimental tests show the shearing deformation of the plywood webs is so large to be negrected. And mathematical analyses on the tests show good result with the formula, introduced by Prof Goth.

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STUDY ON LATERAL BRACING OF AXIALLY COMPRESSED MEMBERS : (Part1) An Elastic Plastic Analysis

CHIAKI MATSUI, HIROMICHI MATSUMURA

Article type: Article
1973 Volume 205 Pages 23-29,88
Published: March 30, 1973
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.205.0_23

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In this paper, an exact analysis has been performed on the elastic plastic behavior of a pinned-end axially compressed member with an eccentricity of load e, which is laterally supported at midspan by a bracing member with elastic spring constant ratio k [Fig. 1]. The analysis is based on Newmark's numerical integration method. As a consequence of the consideration of the analytical results for numerical examples, the following conclusions have been obtained. 1. The bracing stiffness ratio k [Eq.(3)] require the values greater than unity when the axial compressive strength of main members is expected to attain Jezek's approximate strength P_<cr> [Eq.(5)] for eccentrically loaded columns. 2. The values of the bracing force F_<cr> corresponding to the column strength P_<cr> are generally on the decrease as the values of the bracing stiffness ratio k increase, and they tend to converge in the region of k=3〜5. However, the above relation is not applicable to short length members such as λ=20〜40. It is rather remarkable that the inverse relation exists for these members [Fig.5]. 3. The values of the bracing force F_<cr> at P_<cr> increase as the values of eccentricity of load for main members increase. For practical inperfect members with the initial eccentricity [Eq.(4)] they do not exceed 2% of P_<cr> under condition k>3. However, they exceed greatly 2% of P_<cr> on the case of short length members with the large values of eccentricity of load.

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ELASTO-PLASTIC BEHAVIOR OF BRACINGS UNDER THE CYCLIC AXIAL FORCES : Part 1 Analysis

MINORU YAMADA, BUNZO TSUJI

Article type: Article
1973 Volume 205 Pages 31-35,88
Published: March 30, 1973
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.205.0_31

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Bracing is one of the main aseismic elements of steel structures. In this report, the elasto-plastic behaviors of pin ended bracings under the action of monotonous and cyclic loads are obtained analytically as well as numerically. Analysis is carried out under the following assumptions : 1. The bracing member with rectangular cross section is simplified into three points model as show in Fig. 1. 2. The stress-strain relationship of the material is as shown in Fig. 3. 3. The bracing is divided into thirty parts of line elements for calculation, and the equilibrium conditions are satisfied at each ends of elements. (See Fig.7.) 4. The longitudinal deformation &lrtri;l of the bracing is composed of the summation of the strain ε_<2i> at the centroidal axis and the deformation due to the deflection. (See Eq.(19).) Fig.8 shows the axial force deformation relationships under the monotonous compressive force, and Figs.11-16 show the relationships under the cyclic axial forces at the constant deformation amplitudes. Fig.8 shows that after the occurrence of buckling, the compressive resistances of the bracing decrease considerably, especially for the bracings with medium slenderness ratios. From the cyclic axial force deformation relationship obtained here, it becomes clear that for bracings with larger slenderness ratios, the ultimate compressive and tensile resistances decrease with the increase of the number of cycles, while for bracings with smaller slenderness ratios, the resistance does not decrease after the second cycle.

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HYSTERETIC CHARACTERISTICS OF STEEL BRACED FRAMES : Part 2, Dynamic Analysis of Diagonal Bracings

SADAYOSHI IGARASHI, KAZUO INOUE, MITSUGU ASANO, KOJI OGAWA

Article type: Article
1973 Volume 205 Pages 37-42,89
Published: March 30, 1973
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.205.0_37

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In this investigation, the axial stiffness coefficient was derived under any given history of tension and/or compression and was employd to calculate the dynamic response of diagonal bracings shown in Fig.-1. And some of the analytical results are presented, which indicate the influence of the slenderness-ratio of the bracing, and a comparison with "Slip-Model" is also discussed. To conclude, "Slip-Model" is applicable for the behabiours of bracing when its nondimensionalized slenderness ratio is more than 2.0.

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SIMULATION ANALYSIS ON A REINFORCED CONCRETE BUILDING MODEL

KIYOSHI MUTO, TOSHIO KOBAYASHI

Article type: Article
1973 Volume 205 Pages 43-51,89
Published: March 30, 1973
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.205.0_43

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In this paper we describe our analysis of the results from a forced vibration test on a reinforced concrete building model. In conventional vibration analyses, a uniform damping has been used for the whole structure. However, in the case of a concrete building possessing a strong interaction between itself and the soil on which it stands, it is especially necessary to consider individual damping factors for each structural part of the model. We have attempted, therefore, to investigate the dynamic properties of this building model by making use of equation of motion possessing different damping factors for each structural elements. From the diagrams of resonant curves, time history modes at each resonant frequency and phase angle curves, our calculation results showed a high degree of correspondence whith the results of our test. The evaluated internal viscous damping coefficients for the concrete and for the soil were respectively 0.00064 sec and 0.0048 sec. Accordingly, we were able to confirm the rightness of equation of motion possessing different damping factors for each structural elements.

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EFFECT OF RIGIDITY OF STRUCTURES FOR THEIR DIFFERENTIAL SETTLEMENTS : Part I Settlement and Crack Observation of Structures

YASUO HAGA

Article type: Article
1973 Volume 205 Pages 53-60,89
Published: March 30, 1973
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.205.0_53

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This paper describes such results of the observation of structures (reinforced concrete or steel and reinforced concrete) for their differential settlements and cracks in Hiroshima Pref. 1. Shape of relative settlement line of structure. 2. Limiting angle of deformation of structure for crack formation. 3. Allowable settlement of structure. 4. Settlement ratio (observed relative settlement/computed relative settlement) of Structure.

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A STUDY ON ARRANGEMENTS OF AN ESTABLISHMENT WHICH DECREASES A DIFFRENCE OF UTILIZATION-RATE, THAT IS THE RATIO OF USERS OF THE ESTABLISHMENT AMONG INHABITANTS : Study No.5, on the social education, welfare and physical education

AKIHIKO WATANABE

Article type: Article
1973 Volume 205 Pages 61-70,90
Published: March 30, 1973
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.205.0_61

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ESTIMATING OF MEDICAL CARE NEEDS AND SETTING UP THE MEDICAL CARE SYSTEM IN AOMORI PREFECTURE : Study on areawide planning of medical care facilities, Part II

AKITOSHI MATSUMOTO

Article type: Article
1973 Volume 205 Pages 71-80,90
Published: March 30, 1973
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.205.0_71

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Continuously Part I, I have tried to estimate medical care needs and to set up medical care system at eacb region. I have calculated the following and analysed difference of level at each region. i) No. of impatient ii) No. of bed required iii) No. of outpatient iv) Minimum needs expected (outpatient) v) No. of outpatient per doctor (one person) vi) No. of outpatient per other's proffessional staff (one person) On the basis of the above-metioned data I have set up function of each hospital, and then I have proposed regionalized hospital system at each region.

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A STUDY ON CLASSIFICATION OF CITIES ACCORDING TO THEIR FEATURES OF DISTRIBUTION RATIO OF RETAIL SALES

TOSHIKATSU IWAMI

Article type: Article
1973 Volume 205 Pages 81-86,90
Published: March 30, 1973
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.205.0_81

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I think that, the distribution ratio of retail sales in the city is related to the distribution of purchasing power, which is a good reflection of structure of the city. Then, I classify items of goods into some kinds of groups according to correlation of sales in a number of cities. As a technique of classification, I use a component analysis. In this way, I can find the co-ordinate systems that indicate profile values of items of goods on axes. According to their features of distribution ratio of retail sales, each city is located on the co-ordinate systems. Then, through analysis of correlation of profile values of cities and indexes reflecting structure of cities, I think I can get impotant knowledges on planning of commerce in cities.

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