Document Type and Number:
Japanese Patent JPS5616270
Kind Code:
B2
Abstract:
A joint of beam and column-type members comprising essentially concrete of the type wherein intersecting elongate members of reinforcing steel or the like, confined with supporting members in the form of reinforcing hoops, stirrup-ties, supplementary crossties, or the like in the joint region, provide sufficient strength and ductility in the joint to withstand satisfactorily a predetermined amount of reversed flexure. A special concrete mix is prepared with fibers having a modulus of elasticity of at least about 20 million psi substantially uniformly distributed therein with an average spacing between fibers of up to about 0.3 inch and in a quantity sufficient to provide at least a predetermined flexural strength, and the joint is formed with said concrete mix and such intersecting elongate members, the number of said supporting members in the joint region being less than are required to provide said sufficient strength and ductility with concrete not containing any such fibers. The number of said supporting members may be zero.
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Application Number:
JP8559974A
Publication Date:
April 15, 1981
Filing Date:
July 25, 1974
Export Citation:
International Classes:
E04B1/16; E04B1/21; E04C5/01