Transactions of the Architectural Institute of Japan

[title in Japanese]

Article type: Cover
1970 Volume 174 Pages Cover1-
Published: August 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.174.0_Cover1

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[title in Japanese]

Article type: Cover
1970 Volume 174 Pages Cover2-
Published: August 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.174.0_Cover2

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[title in Japanese]

Article type: Index
1970 Volume 174 Pages Toc1-
Published: August 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.174.0_Toc1

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[title in Japanese]

Article type: Appendix
1970 Volume 174 Pages App1-
Published: August 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.174.0_App1

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STUDIES ON THE STRESS-STRAIN RELATIONSHIP IN COMPRESSION OF CONCRETE AT HIGH TEMPERATURES (No.3)

FUKUJIRO FURUMURA

Article type: Article
1970 Volume 174 Pages 1-7,73
Published: August 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.174.0_1

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The Variation in the modulus of elasticity and parmanent set in a heated state and the temperature, determined on concrete specimens, 5cm diameter and 10cm in length, which were not subjected to any load during the heating period, are shown in Fig. 24 to 33. These test results were obtained from the stress-strain curvers of four kinds of test specimens (A, B, D, E), of which mixtures were described in the previous report. As for static modulus of elasticity, 1) there is a sharp reduction at 100℃, and 2) at 200℃and higher the reduction for expanded shale is slightly smaller compared to that for river gravel. Moreover, variations in the tensile strength in a heated state and temperature, determined on concrete cylinders, 5cm diameter and 7cm in length, are shown in Fig. 34.

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OSCILLATORY TENDENCIES OF CIRCULAR CYLINDER IN TURBULENT FLOW

MORIHISA FUJIMOTO, TAKESHI OHKUMA

Article type: Article
1970 Volume 174 Pages 9-19,73
Published: August 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.174.0_9

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In this paper, the results of measurements on oscillatory tendencies of circular cylinder in turbulent flow having the linear distribution of mean wind velocity along the height are presented. The experiment was conducted at the roof of the building of Dept. of Architecture & Bldg. Eng., Tokyo Inst. of Tech. A circular cylinder model, made of plastics and fixed vertically on a steel frame on the roof with a steel bar, is 0.37m in diameter and 1.8m in height. Its natural frequency n_0 is 2.44, 3.03c/sec for two cases, damping ratio is about 0.0025 and Reynolds Number is between 5.0×10^4 and 2.5×10^5 for 30 seconds mean wind velocity U_0. The response of the model was measured using wire strain gauges bonded on the bar. Features of the observed wind by wind meter are as follows; U_0 is 2〜10m/sec, turbulence level is 20〜50% for longitudinal wind velocity and 10〜30 degrees for wind direction and this observed wind can be identified with natural wind. From the experiment, following conclusions were obtained. (1) Adoption of seconds; 100 times of the period of the model, for response evaluating time could be satisfying. (2) A prominent oscillation by Karman vortex was observed. (3) The beat phenomenon based on a characteristics of the model had large effects. (4) Though a prominent peak was seen at S(=n_0D/U_0)=0.2, effects based on "beat phenomenon" and the turbulence of wind were found in calculated mean drag and fluctuating lift coefficient for a oscllating circular cylinder.

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FLANGE BUCKLING AND ULTIMATE LOAD OF BEAMS UNDER MOMENT GRADIENT : Part III-Ultimate Load & Rotation Capacity

YASUNAGA FUKUCHI

Article type: Article
1970 Volume 174 Pages 21-25,74
Published: August 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.174.0_21

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Experiments and analyses on flange buckling of beams under moment gradient have been reported in my before reports (Part I & II). In this report, the ultimate loads and rotation capacities are analized and these analitical values are compared with the experimental values. And these values agree with each other. Thus, the restriction values of the width-thickness ratio (b/t) of the flange plates of beams under moment gradient are proposed as followings according to the results of analyses on the rotation capacities. for SS 41 b/t≦12.3 for SM 50 b/t≦9.1 for SM 50 Yb/t≦8.7 And it is shown that the ultimate loads of these beams can be over the full plastic moment loads.

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ELASTO-PLASTIC ANALYSIS OF THIN-WALLED OPEN SECTIONS

TOSHIRO SUZUKI, MAMORU KIMURA, KAZUO ISHIDA

Article type: Article
1970 Volume 174 Pages 27-32,74
Published: August 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.174.0_27

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This paper discribes the elasto-plastic analysis of arbitary sections under arbitary loads. Strain herdning and the effect of torsion are taken into account in the yield criterion. This numerical procedure is not based on the incrimental-load procedure but on the method that directly solves the equilibrium equation under secant modulus theory. The assumptions for this analysis are as follows : (1) Normal strain is given by the value of the middle line of the cross section. (2) Total strain theory is applied, but strain-reversal is considered. (3) The behaviour of the strain-distribution beyond the elastic is similar that in the elastic range. (4) Axial and Shear Deformation of the members are cosidered to be neglected.

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LIMIT ANALYSIS OF BEAM-COLUMN CONNECTION (XI) : Design Method of H-Beam to Box-Column Connection

HISASHI TANAKA, TSUNEO SHIGENOBU

Article type: Article
1970 Volume 174 Pages 33-37,74
Published: August 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.174.0_33

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SEASONAL FLUCTUATION OF CONSTRUCTION LABOR (II) : The Change of Seasonal Patterns of Number of Construction Workers

RYOICHI SHIMADA

Article type: Article
1970 Volume 174 Pages 39-45,74-75
Published: August 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.174.0_39

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By examining the figure 1 and other figures, we can distinguish three stages in the period after the end of world war II with respect to the seasonal fluctuation of the construction labor in Japan. (I) The end of war (1944)-1950 In this stage, the ordinary seasonal pattern of construction workers does not appear, as seen in the figure 1. Economic conditions have not yet recovered enough just after the perfect destruction of the cities by the war. Because of many unemployed laborers in the cities and the relative richness of the farmers in the rural areas, the farmers did not shift to construction industry during their off-seasons. The high peaks at the end of 1949 and 1950 are thought to have been caused by the seasonal increase of demans including the governmental construction works. (II) 1951-1960 In 1951, the two troughs caused by the two busy seasons of agricultural production appear at first and contunue to be almost stable until 1960. In this stage of the figure 1, the amount of seasonal fluctuation increases as the total number of construction workers increases. In these ten years, construction companies could increase their amount of works without facing the serious shortage of construction labors. (III) 1961-present After 1960, the seasonal pattern begins to shift to left as shown in the figure 2 or figure 3 and the pattern becomes gradually flat. In this stage, the construction company had to change their methods of construction to face with the shortage of labor and at the same time the demand began to adapt themselves to the seasonal pattern of construction labor, as the figure 6 suggests.

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A STUDY ON THE KNOCKDOWN THEATRES AT YAME CITY

SEIROKU OHTA

Article type: Article
1970 Volume 174 Pages 47-57,75
Published: August 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.174.0_47

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These theatres are the old rural theatre, so-called Noson Butai, and exist in the precinct of the Hachimangu Shrine. These all thatres are the very beautiful, elaborate and delicate knockdown theatre for the doll play. The present number of the theatre is three, but at once time, Edo or Meigi period, existed nine or tene theatre. In this report I introduced things on special and novel mechanisms of these theatres.

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

SHIGEKATSU ONOGI

Article type: Article
1970 Volume 174 Pages 59-65,75
Published: August 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.174.0_59

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The building of the Imperial Houshold Agency (KUNAISHO) was planned five times since 1879. The building planned at Fukiage was designed by the engineers of the Department of Public Works which were guided by J. Conder (1852-1920, M.R.I.B.A) in 1882. Also the building constructed on the ground below Momijiyama (completed in 1888) was designed by the engineers of the Department of Public Works in 1884, though it is known as Conder's design. Conder made the piling experiments on the ground below Momijiyama in January 1884, and described rational and utilitarian opinion in his report.

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THE STUDY OF THE SALE AND RECEPTION ROOM OF THE KAITAKUSHI (XII)

AKIHISA ENDO

Article type: Article
1970 Volume 174 Pages 67-71,75
Published: August 30, 1970
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.174.0_67

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The building of the Sale and Reception Room of the KAITAKUSHI which was constructed at Eitaibashi, Tokyo in 1881 is noted owing to the design by J. Conder. In this paper as the part of the studies for historical materials of this building, the materials of building services, namely-a system of work, working hours, a pay, and a compensation for accident etc. are reported.

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