基于OpenSees的空心矩形梁滞回曲线分析

The Hysteresis Curve Analysis of Hollow Rectangular Beam Based on the OpenSees

在地震作用下,桥梁的延性可以消除部分地震力,同时避免桥梁的整体破坏,而预应力结构的延性比较差,当前条件下往往被忽视,这不利于分析桥梁的抗震能力,深入研究预应力混凝土构件及结构的受力与变形性能有着重要的工程意义;利用开源有限元程序OpenSees对预应力横梁进行分析,通过OpenSees对空心矩形预应力混凝土截面进行滞回曲线分析,可以有效的模拟截面在推倒条件下力和位移的反映情况,有效分析延性性能。

Under the action of earthquake,the ductility of the bridge can eliminate some of the seismic forces,while avoiding the overall damage to the bridge,but the ductility of prestressed structure is relatively poor and is often neglected under current condition,which is not conducive to the analysis of bridge seismic capacity,therefore,in-depth study of force and deformation performance of prestressed concrete members and structures is of important engineering significance.In this paper,we use open source finite element program OpenSees for prestressed beam analysis.By OpenSees hysteresis curve analysis of prestressed concrete hollow rectangular cross section,we can effectively simulate section's reflection of stress and displacement in tear down condition and effectively analyze the ductility performance.