Transactions of the Architectural Institute of Japan

[title in Japanese]

Article type: Cover
1971 Volume 190 Pages Cover1-
Published: December 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.190.0_Cover1

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[title in Japanese]

Article type: Cover
1971 Volume 190 Pages Cover2-
Published: December 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.190.0_Cover2

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[title in Japanese]

Article type: Index
1971 Volume 190 Pages Toc1-
Published: December 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.190.0_Toc1

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[title in Japanese]

Article type: Appendix
1971 Volume 190 Pages App1-
Published: December 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.190.0_App1

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EFFECTS OF SIZE AND QUANTITY OF AGGREGATE ON COMPRESSIVE STRENGTH OF CONCRETE (IV)

HIDEO KAWAKAMI

Article type: Article
1971 Volume 190 Pages 1-10,97
Published: December 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.190.0_1

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It has been reported previously by the author that at a given mortar the larger is the size and the greater the volume fraction of gravel, the lower is the compressive strength in one size gravel concrete. And an interpretation was presented that the strengh of one size gravel concrete can be represented in a plane defined by the size and the volume fraction of gravel. The present report discusses the character of the strength plane with reference on consistency of concrete. The volume fractions of gravel in concrete and of sand in mortar are taken up as the factors influencing the consistency of concrete. It is shown that the concrete strength of the same consistency is represented as a line on the strength plane when the consistency is ajusted by the size and the volume fraction of gravel and that the strength plane can be assumed to be constructed with these lines. Test result shows that the larger is the sand content in mortar, the smaller is the strength deduction of concrete from the mortar strength and the value of strength deduction is the same at any water cement ratio when mix proportion of cement paste, sand and gravel is kept the same. Thus the sand content in mortar is thought to play important role in strength of concrete as well as water cement ratio, the size and volume fraction of gravel.

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STUDY ON THE COEFFICIENTS OF DIFFUSION EQUATION CONCERNING THE PROCESS OF UNRESTRAINED SHRINKAGE OF CONCRETE AND MORTAR

MASATOSHI NAKANISHI

Article type: Article
1971 Volume 190 Pages 11-20,97
Published: December 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.190.0_11

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SHEAR STRENGTH AND STIFFNNSS OF WALL PANEL WITH OPENING CONSTRUCTED WITH WOODEN FRAMING AND PLYWOOD FACINGS : Part II-In Case of Wall Panel with Opening of Window-type or Door-type

Hideo SUGIYAMA, Kazuo NAKADA

Article type: Article
1971 Volume 190 Pages 21-26,97
Published: December 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.190.0_21

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The shear racking tests were made on the prefabricated wall panels with opening constructed with wooden framing and rawan plywood facings. Effectiveness of the formulae proposed by the author, predicting the shear stiffness and maximum load of the wall panel of the above type from the shear stiffness and maximum load of the wall panel without opening, is examined by the above test results. In this paper the results of the wall panels with openings of window and door types are examined, while vertical slit, horizontal slit and window were selected as the types of opening in the previous paper. The dimensions of the panels in this paper are larger than those of previous paper's panels.

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TEST ON WELDED STEEL TRUSSES ADOPTED T-STRUCTURAL SHAPE FOR CHORD MEMBERS AND STEEL TUBE FOR WEB MEMBERS : Part 5.2 : Elasto-Plastic Behaviors

KOICHIRO YAMADA, SHIGEO TAKEUCHI

Article type: Article
1971 Volume 190 Pages 27-33,98
Published: December 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.190.0_27

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This paper is the continuity of the previous paper (Part 5.1) and the same welded steel trusses as the previous paper are treated, in which the T-structural shape is adopted for their chord members, the steel tube for their web members and the non-eccentric panel point for their panel points. A specimen of the above mentioned welded steel trusses is tested to find its strength and rigidity in elasto-plastic range under the vertical concentrated loading at a panel point of its upper chord member, the results in this test are discussed in comparison with the results of the elasto-plastic analysis, in which some assumptions based on the charactors of trusses are adopted. And the strength and rigidity of the specimen are experimentally compared with those of a specimen with eccentric panel points in the same shape and size. The results are as follows. 1) In the test the yield load of the specimen was about 28 tons and its rigidity for larger load than the yield one remarkably became small. Finally the maximum load of the specimen was decided by the buckling of a web member. The above mentioned elasto-plastic behaviors of the specimen were known to nearly satisfy the results of the theoretical analysis for it. Consequently the yield load of the specimen was found to correspond to a limited load, in which the specimen for welded steel trusses would lose almost its charactors for the trusses and its upper chord member would begin to apply for a simple beam. 2) The dameges to the panel points of the specimen could not be observed in test. 3) The yield load and rigidity of the specimen with non-eccentric panel points were found to become larger than those of the specimen with eccentric panel points.

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EARTHQUAKE RESPONSE ANALYSIS OF STRUCTURE BY FOURIER TRANSFORM

TETSUJI ITOH, HIROSHI YAMAHARA

Article type: Article
1971 Volume 190 Pages 35-41,98
Published: December 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.190.0_35

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The linear acceleration method and Runge-Kutta method have been generally used for the earthquake response analysis of structure. These methods are effective when the earthquake input is given by acceleration acting at the base of structure. In the case, however, when the input mechanism of earthquake to the base of structure and the interaction effect between soil and structure are taken into consideration, the earthquake signal after passing through some transfer function should be applied to the base of structure. It is comparatively easy to analyse the transfer mechanism by assuming the input earthquake as a harmonic wave, and the general characteristic of the mechanism is expressed usually as a function of frequency of vibration. Thereby, it becomes almost unable to analyse the response of structure by random earthquake using linear acceleration method or other similar methods. In those cases, it is convenient that the earthquake response of structure can be obtained by compounding responses due to harmonic waves. To achieve this, random earthquake is expanded into trigonometric series by Fourier transform, and the random response of structure has been reduced to the problem of harmonic response in this study. As the result, the method by Fourier transform was proved to give enough accuracy and to be carried out by economical speed.

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ASEISMIC CAPACITY OF REINFORCED CONCRETE STRUCTURES : Medium or Low Rise Reinforced Concrete Rigid Frames with Shear Walls

MINORU YAMADA, HIROSHI KAWAMURA

Article type: Article
1971 Volume 190 Pages 43-50,99
Published: December 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.190.0_43

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The aseismic capacity of medium or low rise rectangular reinforced concrete rigid frames with shear walls is discussed here through the comprehensive treatment of such reinforced concrete structures which are assumed to be composed of three aseismic elements, i.e. long column units (LCu), short column units (SCu) and shear wall units (SWu) (cf. Fig.1). The total aseismic capacity is able to be estimated by the total deformation characteristics of such elements. The fracture modes, the natural periods and the critical numbers of stories of reinforced concrete structures are characterized by the combination of these three aseismic elements (cf. Figs.8 (a), (b)). These figures show that the shear walls have the largest influences upon the aseismic safety and the effects of sufficient web reinforcement (η1≧1%) of short columns are very large too (cf. Fig.15). A new comprehensive aseimic design method of medium or low rise reinforced concrete buildings with shear walls is presented here in this paper based upon the general deformation behaviours of such structures. and a checking and a stiffening method of already exixting reinforced concrete buildings is proposed here too.

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STRESS ANALYSIS OF T TYPE BEAM-COLUMN CONNECTIONS (II)

TOSHIO OKOSHI

Article type: Article
1971 Volume 190 Pages 51-57,99
Published: December 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.190.0_51

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STUDY ON TENSION TYPE JOINTS USING HIGH TENSILE BOLTS : Part 2 Theoretical Analysis of Split Tee Stub Joints Fastened with High Tensile Bolts

MORIHISA FUJIMOTO, ATSUHIDE HASHIMOTO

Article type: Article
1971 Volume 190 Pages 59-67,99
Published: December 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.190.0_59

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It is known that spring constant of the plates is the most important factor in estimating tension type joints strength. Up to present, the absence of exact solution of both range of stress distribution inside of the plates and amounts of displacement of plate surface created by fastened bolts may be accounted for a barrier in direct estimation of joints strength. Thus estimation of exact solution of these two aspects on individual plates seems to be very important in analysis of tension type joints strength. The previous report describes theoretical and numerical analysis of exact solution of above two aspects using three dimensional elastic theory, and thereafter approximate equations to be useful for practical calculation of both spring constant and range of stress distribution inside of bolted plates were introduced. Now, in this report, changes of both bolt tension and plates' bending moments of T-stub joints, which was fastened with high tensile bolts, under various external tensions were theoretically estimated by new methods using the results of the previous report. Strength of joints under various tensions were further substantiated experimentally. All experimental values were in good agreement with those obtained by theoretical computation at corresponding conditions. Therefore, simple approximate equations here introduced can be applicable for practical estimation of T-stub joints strength. Similar approach may also be applicable for estimation of strength of more complicate tension type joints.

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[title in Japanese]

Article type: Bibliography
1971 Volume 190 Pages 67-
Published: December 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.190.0_67

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COST STUDY OF STRUCTURE FOR SCHOOL BUILDINGS (Part 1) : Reinforced Concreate School Buildings

AKIO MATSUMOTO

Article type: Article
1971 Volume 190 Pages 69-78,100
Published: December 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.190.0_69

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A comparative study of the costs of structure was made with brief structural calculations and cost estimates by varying the areas of classroom and the methods of structural framing of 3 to 6-story reinforced concrete school buildings. 44 examples on Type I which have the inner walls designed as the anti-seismic wall, and another 12 examples on Type II which are not designed with such walls. Generally speaking, the cost of reinforced concrete structure for school buildings becomes less as the area of classroom becomes larger. In case of Type I, 4-5-story Plan A, 3-5 story Plan B, and 3-story Plan C are the most inexpensive amonong each type. On the other hand, 6-story buildings in each type are the most expensive. Comparing the 7×9 meters classroom of 4-story schools. Plan B and C are 6% and 12% respectively more in comparison to Plan A, and the ratio of cost in respect to the height of building is only 2%. In case of 7×9 meters classrooms of Type II, 4-story school is the cheapest, but the 6-story is the most expensive. The cost difference in respect to the height of building are as follows. Plans A and B, 1%, Plan C, 3%. Plan C is 4-5% more than Plans A and B. Since Type II must resist the earthquake load only by the rigid frame, without the anti-seismic wall reinforcements like Type 1, approximately 20 to 40% more steel will be required.

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ON THE STRUCTURE OF THE RURAL PRODUCT SPACE : STUDIES OF THE METHOD OF RURAL PLANNING Part 1

MITSUO IYANAGI, SHIRO AOKI

Article type: Article
1971 Volume 190 Pages 79-86,100
Published: December 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.190.0_79

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It is the purpose of this paper to research into the space organisation of the present rural region and its structure, and to investigate the desirable method of rural planning by pointing out some problems existing in this space structure. As a result of this report, it is proved that the major, space structure of the present rural area is composed of farm, Agricultural Cooperat on and home stead, besides that the functional relationship of the three spaces is irrational. It is arisen from a private enterprise system in Japanese agriculture. Therefore, it is necessary to consider that the desirable rural planning should be made a start from the reform of agricultural product system.

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A STUDY ON THE PROPORTIONAL SYSTEM IN JAPANESE STYLE. HOW TO STATISTICAL ANALYZE BY THE SPECIMENS. : Statistical Analysis of the Specimens. No.1

TAMOTSU IWATATE

Article type: Article
1971 Volume 190 Pages 87-95,100
Published: December 30, 1971
Released on J-STAGE: August 22, 2017

DOIhttps://doi.org/10.3130/aijsaxx.190.0_87

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This dissertation is statistical analysis by the specimens of Japanese style for proportional relation. (1) In this study, No.1, stalistics are Coefficient of correlation, signifficant level, regression line, standard deviation and breadth between the 2 lines pavalled to the regretion line. (2) In the statistical phenomena, the mutual relation (correlation) is diffrent from the proportional relation. The proportional phenomenor are to have next statistics, that is to say. (A) It is to has mutual relation in the significant level at 0.001. (B) Both standard deviation and the breadth of 2 straight lines are to have neally zero. (3) this study has statistical analysis of the mutual relation between specimens in Zen style and make it a rule to a basis of the statistical analysis in Japanese style for the proportional retation. (4) The other method of statistical analysis has a correlational model for experiment and it is basis of statistical relation in Japanese style.

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