简支梁在预应力与移动荷载作用下的动力性能分析

运用有限元软件ANSYS,采用实体力筋的独立建模耦合法建立了预应力钢筋及混凝土单元,模拟了车辆荷载作用在单片梁上,对其进行了动力分析。结果表明:施加预应力有效防止了荷载对梁作用产生较大的应力,预应力技术的采取使得桥梁能够部分或全部抵消由荷载产生的拉应力,从而有效地防止裂缝的产生,提高了桥梁的承载能力。

Dynamic Performance Analysis of Simply Supported Beam Under the Action of Prestress and Moving Load

By using the finite element software ANSYS, the prestressed reinforcement and concrete element are established by using the independent modeling coupled method of the solid reinforcement. The vehicle load is simulated on a single beam, and the dynamic analysis is carried out. Results show that prestressing effectively prevents the load of beams produced larger stress, and the prestressing technique is adopted to make the bridge partially or completely offset by the tensile stress generated by the load. , so as to effectively prevent the cracks, and improve the bearing capacity of the bridge.