部分剪力连接钢-混凝土组合梁变形计算的组合系数法

为准确计算部分剪力连接组合梁在考虑滑移效应时的挠度,在对组合梁变形计算的既有方法进行综合评述的基础上,提出了新的计算方法--组合系数法.采用应力等效的简化方法,分别推导了无剪力连接和完全剪力连接组合梁的组合系数,并采用插值方法建立了部分剪力连接组合梁的组合系数.利用该法进行了大量算例的计算,计算结果与理论解析方法和试验结果吻合良好.组合系数法不需要进行换算截面的计算,而且将无剪力连接、部分剪力连接和完全剪力连接组合梁的计算方法统一起来.组合系数法形式简单,物理意义明确,计算结果能够满足工程精度要求.

Consistency factor method for calculating deformation of composite steel-concrete girders with partial shear connection

A new method,referred as consistency factor method,is presented for calculating the deformation of composite steel-concrete girders with partial shear connection.First,the state-of-the-art on this subject is reviewed.A simple formula using the parameters of the consistency factor is proposed.The consistency factor of non-connection and full-connection composite girders are derived from the equivalent stress method.Then the coefficient of partial connection composite girders is computed by the interpolation method.The result calculated by this method has a good agreement with those obtained from experiments.The method of composite coefficient need not compute the transformation section.The degree of shear connection can be taken into account.Consistency factor method can be used to compute all of the composite steel-concrete girders.The new method is of simple form,and can reflect the structural mechanism for composite steel-concrete girders with partial shear connection.