组合效应对钢节点抗震性能的影响因素分析

钢—混凝土组合梁当前在钢框架结构中已经得到了广泛的应用,但是地震荷载作用下组合节点的设计方法却一直在完善和发展.基于组合节点的数值分析,着重研究钢框架梁柱节点的抗震性能,进行了有限元分析、模型参数分析,研究了不同变量条件下节点抗震性能与梁强度的平衡关系,并针对混凝土板中的配筋率、混凝土板板厚、钢节点类型等因素进行了分析和讨论.分析结果表明,在进行钢框架梁柱节点的抗震设计时,应该考虑混凝土板的组合效应.

Influence Factor Analysis of Seismic Performance of Steel Beam-Column Moment Connections with Composite Effect

Steel-concrete composite beams have been widely used in frame structures,but the investigation on design procedures of composite connections under seismic load is in continuous development.In this paper the seismic behavior of beam-column moment connections with concrete slab is investigated based on an interpretation of composite connection test and numerical analyses.A parametric study has been carried out using this model to check the balance between connection and beam strength for a wide range of variables.The amount of steel reinforcement in the slab,the connection details of the steel beam to the column,and the steel connection style will remarkably affect the moment resistance, initial rotational stiffness and the rotation capacity of connections.These results indicate that the effects of concrete slab should be considered in the seismic design of the connection.