Transactions of the Architectural Institute of Japan
Online ISSN : 2433-0019
Print ISSN : 0387-1177
ISSN-L : 0387-1177
9.SHEARING RESISTANCE OF REINFORCED CONCRETE BRACING WALLS (Part 2)
Masahide TomiiYorihiko Ohsaki
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1956 Volume 52 Pages 68-78

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Abstract

This paper is the continuation of Part 1 written by the same authors in Transactions of A. I. J., No. 51, Oct. 1955 In the preceding paper (1) shearing regidity and (2) load of crack appearance were discussed with respect to almost full-scale specimens of reinforced concrete bracing wall. Based on the test results of those specimens, (3) maximum load carrying capacity, (4) ultimate strength and (5) effect of reinforcement are discussed in this paper. Results of test and conclusions obtained there from may be briefly summarized as follows: (1) When the enclosing frame has sufficient strength to resist external shearing force still after the inner wall has been cracked, total maximum load carrying capacity can be represented by average unit shearing stress equal to 0.22Fc where Fc is compressive strength of concrete. When the thickness of wall exceeds a certain limit in comparison with the dimensions of enclosing frame, the frame fails together with the inner wall when maximum load carrying capacity is reached. (2) With respect to ultimate strength of bracing walls many things have been left for further investigations. In the present state, however, it may not safely be expected that, in ultimate state, any additional strength is afforded to a frame by the wall enclosed therein. (3) Some of reinforcing bars in bracing wall are broken due to tensile stresses increased beyond yield point before maximum load carrying capacity of the wall is reached. Whatever the amount of reinforcing bars may be within the range of common practice, they do not serve to delay the appearance of cracks nor to improve the rigidity of the wall after cracks have been once appeared.

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© 1956 Architectural Institute of Japan
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