组合梁滑移特性分析及连接单元改进

通过试验分析了组合梁的滑移特性，提出了一种新的栓钉模型。实测结果表明，当栓钉沿梁纵向均匀布置时，解析法和数值法得出的结果与实测值较吻合。但当栓钉沿梁纵向非均匀布置时解析法得出的数值与实测值偏差较大，而数值法则与实际更吻合。由于栓钉模型考虑了组合粱偏载时栓钉的横向抗剪作用，比单一考虑纵向抗剪模型更符合实际受力情况。因此，有限元方法在处理栓钉的分布及荷载作用时较解析法具有更大的灵活性和实用性。

Analysis of Slip Property in Steel-Concrete Composite Beams and FEM Improvement

In this paper, the adapability of various methods to solve the interface slip in steel-concrete composite beams is analyzed through test,and a new model of linkage unit is introduced. Comparation of the numerical method to test results show that this model has good precision as while as the exsiting theoretical methods when stud bars are evenly distributed. But when stud bars are unevenly distributed, numerical method is more accurate than theoretical methods.The results also indicate that FEM with the new model has a good agreement with test values ,for the new model considers shear resistance of stud bars in transverse direction when the beams are under eccentric compression.It proves that the new method is correct and convenient in practice for analysis of composite beams.