多层钢框架中梁柱端板连接的强度和刚度

端板连接的构造特点决定了其在具有较强承载能力的同时还具有一定的柔性,有别于传统的刚接和铰接。针对这一现象,本文论述了多层钢框架结构中梁柱端板连接的强度和刚度问题,包括连接的构造形式、端板和螺栓的计算方法、节点域柱腹板的受力状态以及加劲肋的作用,根据端板连接的简化力学模型提出了确定连接极限承载力和转动刚度的方法,其中转动刚度主要与节点域剪切刚度和端板抗弯刚度有关。最后,结合连接的荷载.位移曲线特点推导出单向加载和循环加载下连接的简化弯矩转角关系,并与相关数据结果作了对比验证,该方法简单实用且比较准确,可供结构计算和节点设计参考。

The strength and stiffness of beam-to-column end-plate connections in multi-story frames

The constructional characteristic of end—plate connection makes it able to sustain large moments and at the same time to show flexibility at some degree.This is what it differs from the conventional rigid and simple connections.Aim at this property,the strength and stiffness of beam-to—column end—plate connections in muhi.story frames werediscussed in this paper,including type of detailing,design method of end.plate and bolts,mechanical state 0f columnweb in panel zone and actions of rib stiffeners.Based on the simplified mechanical model of COnnections and the char.acter of load-deflection curve,methods for calculating moment capacity,rotation stiffness and moment.rotation rela.tionship under monotonic loading and cyclic loading of connections are presented.After comparison with the theoIleticalresults given in reference2= ,it was found that the presented method is simple and practical,and can be served as areference for structure calculation and connection design in relative engineering.