Abstract: In terms of behavioral mechanics of PC bridge,the numerical analysis method is used to analyze the stress distribution rules and mechanical characteristics of box girder section of PC bridge under different horizontal forces.The influences of post-tensioning prestress holes on mechanical characteristics of bridge cross-section are also studied,which offers theoretic basis to study the cracking problems of box girder of this kind of bridge.

Key words: post-tensioning prestress, prestressed concrete, mechanical characteristics of cross-section, numerical analysis

摘要： 从PC桥梁力学行为入手,通过数值分析的方法,分析PC桥在不同横向受力状态下箱梁截面应力分布的规律及受力特性,研究预应力孔道对PC桥梁截面受力特性的影响,从而为该类桥梁箱梁开裂等问题的对策研究提供理论依据。

关键词: 后张预应力, PC(预应力混凝土), 截面受力特性, 数值分析