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2. 发明授权

US4040220A Concrete joints 失效
标题翻译：混凝土接头
公开(公告)号：US4040220A
公开(公告)日：1977-08-09
申请号：US382519
申请日：1973-07-25
申请人： Charles H. Henager
发明人： Charles H. Henager
IPC分类号： E04B1/16 , E04B1/21 , E04C5/01 , E04B1/00
CPC分类号： E04B1/21 , E04C5/012
摘要： 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.The special concrete mix may be extended into a region beyond the joint region in at least one of the beam and column-type members with stirrups or stirrup-ties provided around the elongate members in the extended region, the number of said stirrups or stirrup-ties being less than are required to provide the necessary strength and ductility in said region with concrete not containing any such fibers.
摘要翻译：梁和柱型构件的接头，其主要包括类型的混凝土，其中加强钢等的相交的细长构件在接头中以加强箍，箍筋，辅助钻石等的形式限制在支撑构件上在接头中提供足够的强度和延展性以令人满意地承受预定量的反向挠曲。制备一种特殊的混凝土混合物，其纤维的弹性模量至少约为2000万psi，基本上均匀分布在其中，纤维之间的平均间隔至多约0.3英寸，其量足以提供至少预定的弯曲强度，并且接头由所述混凝土混合物和这种相交的细长构件形成，所述接合区域中的所述支撑构件的数量小于为不含任何这种纤维的混凝土提供足够的强度和延展性所需的数量。所述支撑构件的数量可以为零。

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