高速铁路跨度132m钢桁梁正交异性板桥面系横肋开孔处应力分析

Stress Analysis of Cross Rib near the Hole of Orthotropic Steel Deck System with 132 m Span Steel Truss Beam on High Speed Railway

为了保证正交异性板的整体性,纵梁、纵肋通常连续通过横梁、横肋,横梁(肋)在相交处需相应开孔。横梁(肋)开孔处由于承受面内及面外的应力,使得该部分的应力非常复杂,是桥面系的薄弱环节,合理的构造处理及开孔形式能够改善该部分的应力集中,优化桥面设计,延长桥面系使用寿命。通过对桥面系板单元有限元分析,总结出该部分受力特点及影响因素,并对开孔方式的影响进行了定性分析。

In order to ensure the integrity of the orthotropic steel deck system,longitudinal beam and longitudinal rib usually cross transverse beams and ribs continuously,and transverse beams or ribs need to cut holes at the cross point. Stress near the transverse beams or ribs is very complex due to the stress in and out of the plane,where the weak link exists in the deck system. The reasonable structure treatment and hole shape can improve the stress concentration of this area so as to optimize the design of the bridge deck and prolong the service life of the bridge deck system. The finite element analysis shows the characteristics and influencing factors of the joint place and quantifies the influence of the hole shape.