两个结构构件之间的可变连接,同时也可称为局部关联或者层间滑移。一般指组合的钢-混凝土梁和铰接或固定连接的梁。大多数研究集中在具有材料非线性的组合梁上。这些构件会承受压力和弯曲作用,需要考虑二阶效应。针对具有层间滑移的复合梁柱的非线性材料和几何分析,开发了一个基于位移的有限元模型,并对其进行测试。有限元模型完全基于Lagrangian假定,考虑了大位移、小应变和适当的转动。通过与文献中的算例进行对比,验证了所提方法的有效性与准确性。 The variable connection between two structural members can also be referred to as a local association or an inter-story slippage. Generally refers to the combination of steel - concrete beams and hinged or fixedly connected beams. Most studies have focused on composite beams with material nonlinearities. These components will be under pressure and bending, need to consider the second-order effect. Aiming at the nonlinear material and geometric analysis of composite beam with interlayer slippage, a displacement-based finite element model was developed and tested. The finite element model is based entirely on the Lagrangian assumption, taking into account large displacements, small strains and proper rotation. By comparing with the examples in the literature, the validity and accuracy of the proposed method are verified.