地震作用下预应力锚索抗震性能及预应力损失的研究

Research on Seismic Performance and Prestress Losses of Prestressed Anchor Cable under Earthquake Impact

该文利用完全动力有限元法,对比有预应力锚索支护边坡与无支护边坡在地震下动力响应的差别,研究预应力锚索的抗震性能;其次,分析不同类型地震波作用下锚索预应力损失的情况。数值结果表明:地震动力作用下预应力锚索抗震效果良好,其预应力损失同锚索的位置与输入的地震波类型有关,在地震动下靠近坡顶的锚索起到的抗震作用更为明显。研究结果对预应力锚索支护边坡的抗震性能分析具有参考价值。

Differences between slop with prestressed anchor cable support end that without any support under earthquake impact are presented with fully dynamic finite element method to study seismic performance of prestressed anchor cable and prestress losses of anchor cable under different types of seismic waves are analyzed. The numerical results show that seismic performance of prestressed anchor cable is quite good under seismic dynamic situa- tion, prestress losses arc related to anchor cable location and types of seismic wave and the anchor cable close to slope peak has more obvious seismic performance. The study can offer some references to analysis on seismic performance of slope with prestressed anchor cable support.