先张法预应力混凝土梁受弯极限承载力研究

A study on flexural ultimate bearing of the pretensioned prestressing concrete beam

针对先张法预应力混凝土空心梁底板出现纵向裂纹的事实,在改进施工工艺的基础上,采用有限元软件ANSYS仿真技术,分析先张法预应力混凝土空心梁的受弯极限承载力,并将分析结果与实际简支桥梁设计荷载相比较,得出该桥梁的安全系数为5.27。

Aiming at the fact that many longitudinal cracks appear on the bottom of the pretensioned prestressing concrete hollow beam, this paper analyzes the flexural ultimate bearing of the pretensioned prestressing concrete hollow beam by use of simulation analysis of ANSYS soft on the basis of the improving construct, and compares the calculated results with the real design loading of simply supported girder bridge. The conclusion is that the safety factor is 5.75.