【摘要】 以柔性连接竖向等高和不等高双塔连体结构为研究对象,分别对其进行7度罕遇地震作用下的弹塑性时程分析,然后以7度罕遇地震作用下的连接支座最大位移作为碰撞临界间隙,将7度罕遇地震动加速度峰值放大1.4倍,研究在超过设防标准的罕遇地震作用下,柔性连接连体结构在考虑碰撞作用与不考虑碰撞作用下的地震响应。分析结果表明:柔性连接连体结构受力较为合理,在塔楼底部加强部位剪力墙钢筋和混凝土出现屈服,剪力墙连梁和框架梁出现不同性能的塑性铰的情况下,支承连廊的框架柱并没有出现屈服,连接支座的位移也在合理范围内,具有较高的抗塌落性能。此外,连廊桁架底部和顶部与塔楼之间都有可能发生碰撞,但顶部碰撞在连廊桁架杆件内产生的内力方向与重力荷载作用下桁架杆件内力方向一致,使桁架杆件的内力增大。更多还原

【Abstract】 Elasto-plastic seismic response of the same and different height connected structures linked with flexible bearings are analyzed by time-history analysis method under the rarely occurred earthquake of intensity 7.The maximum displacements of the bearings are designed as a critical collision gap,and magnifying the peak ground acceleration 1.4 times,the structural dynamic responses of the connected structures are further studied in details,considering and without considering the pounding effect.The results indicate that the failure mode of connected structures is rational.Although the rebar and concrete of shear-wall at bottom strengthened part yield,and plastic hinges based on different performance occur in coupling beams of shear-wall and frame beams under over fortification criterion earthquake excitations,the frame columns supporting the corridor don’t yield,and the displacements of the bearings are reasonable,which show that the connected structures linked with flexible bearings have enough anticollapse performance.The pounding can occur in upper and lower parts of corridor,and the direction of the internal forces of the connecting truss caused by pounding is consistent with the direction of the internal forces caused by gravity when the pounding occur in the upper part of the corridor,which make the internal forces of the connecting truss larger.更多还原