Transactions of the Architectural Institute of Japan

[title in Japanese]

Article type: Cover
1971Volume 185 Pages Cover1-
Published: July 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.185.0_Cover1

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[title in Japanese]

Article type: Cover
1971Volume 185 Pages Cover2-
Published: July 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.185.0_Cover2

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[title in Japanese]

Article type: Index
1971Volume 185 Pages Toc1-
Published: July 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.185.0_Toc1

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[title in Japanese]

Article type: Appendix
1971Volume 185 Pages App1-
Published: July 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.185.0_App1

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STUDIES ON THE STRESS-STRAIN RELATIONSHIP IN TENSION OF STRUCTURAL STEEL AT HIGH TEMPERATURES

TAMOTSU HARADA, FUKUJIRO FURUMURA

Article type: Article
1971Volume 185 Pages 1-7,91
Published: July 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.185.0_1

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In order that the temperature fields calculated with reference to an external thermal effect produced by a fire on a steel or reinforced concrete structure or a structural part may be interpreted in terms of the load-bearing capacity available at different instants throughout the duration of the fire, it is required to possess detailed information which shows how the strength and deformation properties of the structural materials vary with the temperature in the temperature range associated with the fire. In this paper, the strength and deformation properties of two kinds of mild structural steels under the action of tensile loads in the temperature range 20 to 600℃ are shown. The following test specimens are prepaired. Steel Grade Test Specimen Mark Heat Treatment SS41 SS41-A no heat treatment SS41 SS41-B normalising, 900℃, 1/2 hour WEL-TEN60 WEL-TEN60-A no heat treatment WEL-TEN60 WEL-TEN60-B annealing, 500℃, 1 hour Fig. 8 to 11 show how the stress-strain diagrams of mild structural steels change with the temperature, and Fig. 12 to 23 illustrate the variations in the tensile strength, in the modulus of elasticity, in the 0.2 per cent yield strength, in the proportional limit, in the elongation, and in the reduction of area, with the temperature.

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THE DISTRIBUTION OF DEFLECTION AND STRESS OF RECTANGULAR FLAT GLASS

HATSUO ISHIZAKI, YOICHI HORIE

Article type: Article
1971Volume 185 Pages 8-14,91
Published: July 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.185.0_8

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By an extended application of the method of calculating the deflection and stress of square flat glass, as shown in the previous paper (1), we obtained the deflection and stress when rectangular flat glass, commonly used in actual buildings, is subjected to a uniformly distributed load. After conducing relevant experiments on rectangular flat glass, we compared and examined the results of such experiments with calculations obtained by the above method. (1) Transactions of The Architectural Institute of Japan No.172 June 1970.

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STUDY ON UPPER LIMITATION OF STEEL STRENGTH UTILIZABLE FOR REINFORCED CONCRETE MEMBERS (II)

REIJI TANAKA

Article type: Article
1971Volume 185 Pages 15-24,92
Published: July 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.185.0_15

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Recently, many high strength steel Bars is used in reinforced concrete structure. But, there are no studies solved this question "How high strength steel bars can be utilized effectively in R. C. members?". Solving this question is very important to development of high strength steel bars. This study gives an anser to this question. First, this study proves that steel strength could be utilized effectively in R. C. members have a upper limitation, and that this upper limits is restricted by the following valuable condition Secondary, in this study, this upper limitation restricted by the following conditions is analyzed by theoletical caluculation conditions considered in this study (1) Ultimate bending strength of Beam and Column. (2) Bending ductility of beam and column. (3) Shear strength of beam and column. (4) Shear failure of beams and columns conection. (5) Reduction of Bending strength by the fars settled through the beams and column ccnection. (6) Anchor failure of bend bars. (7) Allowable crock width. (8) Allowable deflection of beam (9) Allowable deflection of column at earthquake.

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INFLUENCE OF THE AIR ON FREE VIBRATION OF A VIBRATING BODY

RYUICHI OKA

Article type: Article
1971Volume 185 Pages 25-36,92
Published: July 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.185.0_25

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Among various vibration damping causes, the one which may be utilized for layout of damping property, necessary for dynamic earthquake-proof construction is resistance of the air. In this study, a vibration body (model) is given vibration, wherein the projection surface of vibration direction (A_n) is only changeable while height (h), specific period (T_o), weight (W), initial amplitude (A_o) and vibration curve there of are constant inside vacuum and atmospheric air of both spaces and the amplitude envelope of free damping vibration is aralized and it is found, upon investigation, that influence exercised on vibration damping of the present air resistance is the greater when W/A is the smaller. At around W/A=0.3 gr/cm^2, Amplitude ratio=[numerical formula] when W/A=0.0026 gr/cm^2, it becomes around 24.

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THEORETICAL STUDY ON OSCILLATORY TENDENCIES OF CYLINDRICAL STRUCTURES IN NATURAL WINDS (1) : General Method of Aeolian Vibration Analysis

MORIHISA FUJIMOTO, TAKESHI OHKUMA

Article type: Article
1971Volume 185 Pages 37-44,93
Published: July 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.185.0_37

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This paper presents the general method of analysis of so-called aeolian vibrations in relation to the theoretical study on oscillatory tendencies of cylindrical structures in natural winds. Recent studies indicate that lift forces acting on a circular cylinder in a flow show various characteristics depending on factors such as the Renolds number, length and supporting conditions of the cylinder, the cylinder motion, etc. It means that the aeolian vibrations are classified into various types of oscillations. For example, they are forced vibrations caused by periodic external forces or random ones which apply independently of the cylinder motion, self-excited vibrations due to aerodynamic forces which interact with the movement of the structure, and selective resonance. So, the establishment of the common calculation procedure for the various types of the aeolian oscillations is firstly required for a study on the vibrations of cylindrical structures in natural winds. In its method, aerodynamic lift forces are treated as stochastic quantities and only the critical states of them are taken into consideration. The calculated results for some cases of one-freedom system mounted two-dimensionally in uniform flow in subcritical range closely agree with the experimental results.

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ELASTO-PLASIC LATERAL SWAY OF REINFORCED CONCRETE KNEE FRAMES, WITH PARTICULAR EMPHASISE ON THE EFFECT OF SHEAR DEFORMATION UPON THE DUCTILITY OF KNEE FRAMES : Shear Explosion of Reinforced Concrete Columns (Part 2)

MINORU YAMADA, HIROSHI KAWAMURA

Article type: Article
1971Volume 185 Pages 45-53,93
Published: July 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.185.0_45

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In the previous paper 1) 2), the auther had indicated the difference of the collapse modes between long and short reinforced concrete columns, and had pointed out the existence of the critical shear span ratio value between them. Experimental investigations were carried out to make clear the effect hoops on the improvement of the defornation capacity of short column too. In this paper, analytical researches are carnied out in order to make clear the elastic horizontal sway behaviours of unit reinforsed concrete knee frames with single and double bays subjected to constant vertical loads, which represent the behaviours of real reinforced concrete structures with various column length in the same level. At first, relations between shear force (Q^^-) and relative sway angle (R) of single column (See Fig. 13) are introduced by means of superposition of Q^^-^B-R^B relations (in case of bending) and Q^^-^S-R^S ones (in case of shear), which are given by the general expressions resprectively (See Fig. 12). Then, by the combination of these relations of eachsingle column, the Q^^--R relations of unit knee frames are calculated (See Figs. 14-20). Figs. 21-26 with the parameters α shows this relationships in the more general forms with the values Q^^-_y, R_y of the column H^^-=5 as standard. The general characteristics of this relationships are illustrated in Fig. 30. In case of the knee frame which contains columns with lower shear span ratio than the critical value (Eq. 26 or 27) and without shear ductility, the Q^^--R relation of such a knee frame is indicated by the dotted lines (O-A-A'-B'-C'), and the energy loss may be estimated by the area OBAA'B'C' that should be absorbed by hoops. By this research, the combined bending and shear deformation behaviours of reinforced concrete single columns and of knee frames become clear analytically. As a result, the depression phenomenon of lateral sway capacity of reinforced concrete real frames composed of long and short columns is clarified and it seems to be one of the main reason of the damage of reinforced concrete structures at the Tokachi-Oki earthquake 1968.

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LIMIT ANALYSIS OF BEAM-COLUMN CONNECTIONS (XII) : Connections of Wide-flange Beam to Circular-tubing-column Subjected to Bending and Thrust

Hisashi TANAKA, Takao YAMADA

Article type: Article
1971Volume 185 Pages 55-64,94
Published: July 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.185.0_55

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LUMINANCE DISTRIBUTION ON CLEAR SKIES, Part 1 : Measurements of the Luminance Distribution

TADAHIKO NAGATA

Article type: Article
1971Volume 185 Pages 65-71,94
Published: July 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.185.0_65

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A STUDY ON MAN-SPACE SYSTEM : Models for Behavioral Prediction

RIYOZO NAKAMURA, YUJI ONISHI, [in Japanese], [in Japanese], YOSHIROU I ...

Article type: Article
1971Volume 185 Pages 73-78,94
Published: July 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.185.0_73

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The purpose of the study is to establish a method that will contribute to predict and control human behavior within any given system on the basis of the study already made on a predefined system called T Amusement Park. In the previously submitted paper, we tried to grasp the T Amusement Park as a unitary total manspace system with feedback mechanism, analyzing the given system with the aid of simulation language GPSS III. In due course, it turned out that producing and manipulating models for a total system was beyond the computor's capacity and besides was uneconomic. In the paper, therefore, our study is focused on producing mono-functioned models, considering that a model can be applied as a sub-system at a later stage.

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A STUDY ON THE UENO MUSEUM DESIGNED BY J. CONDER (IV)

SHIGEKATSU ONOGI

Article type: Article
1971Volume 185 Pages 79-85,94
Published: July 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.185.0_79

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This paper describes on the main structural part in the Ueno Museum on the basis of the plans and the specification. J. Conder introduced the inverted arch in the brick footing and many bands of iron in the brick wall to increase the tensile strength and the box girder of iron or the coupled beam of wood reinforced with iron plate in the second floor framing. These introductions were the earliest example of the brick building in Japan.

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[title in Japanese]

[in Japanese], [in Japanese]

Article type: Article
1971Volume 185 Pages 87-
Published: July 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.185.0_87

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[title in Japanese]

[in Japanese]

Article type: Article
1971Volume 185 Pages 88-89
Published: July 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.185.0_88

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