简支梁加载结果分析

利用ANSYS软件对三类不同情况的简支梁进行了非线性有限元分析,对于体外预应力加固的带缝梁的模拟考虑了几何非线性,材料非线性及接触影响;分析了试验梁在三个不同阶段的应力、挠度状况;通过对比分析得出结论:施加体外预应力能使梁的承载能力得到提高,还能提高无缝梁的抗裂能力,说明体外预应力加固技术是切实可行的。

Analysis on Load Results of Simple Supported Beams

Based on ANSYS software, nonlinear finite element analysis is carried out about three kinds of simple supported beams. Geometric nonlinear, material nonlinear and material contact effects are considered in finite element models. The situation of stress and the deflection for the beams is analysed; The conclusions are reached： ultimate loads of beams are increased by applying externally prestressing tendons, performance against the crack is splitted up, it is a good measure for the technology.