不同剪力连接钢-混凝土组合梁试验及有限元分析

Experiment and Finite Element Analysis of Steel-Concrete Composite Beams with Different Degrees of Shear Connection

为探讨连接件对钢-混凝土组合梁在静载作用下的抗弯性能的影响,对四根不同剪力连接的组合梁进行试验,观察试件的受力性能、破坏形式,分析试件的荷载-位移曲线、荷载-应变曲线、荷载-滑移曲线等;并采用组合梁单元模型,对钢-混凝土组合梁进行了有限元分析。通过试验和数值分析可以发现,组合梁具有良好的延性,连接件的连接程度对组合梁的变形、承载力具有较大的影响,数值计算与试验结果较吻合。

In order to investigate the influence of the connecting on the bending resistance of the steel-concrete composite beams under the static concentrace,four samples of steel-concrete composite beams are experimented to observe the bending capacity,failure mode,load-deflection relationship、load-strain relationship、load-slip relationship and so on.The finite element method is applied to calculate the load-deflection relationship of the steel-concrete composite beams by using a double-beam model.The research of experiment and the analysis show that the connecting fitting greatly influences its distortion of composite beams,and the steel-concrete composite beams have good genacity in displacement and the calculated result is in a good agreement with that of the test.