关键词: 正交异性板, 高速铁路桥梁, 疲劳, 应力集中

Abstract: Finite-element model was established by ANSYS for orthotropic steel bridge deck． Taking the standard ZK live load of PDL as the train load，the local stresses of the joint of rib and deck，the rib and crossbeam，and the cut-outs of the crossbeam were analyzed respectively． Analysis results showed that the stress of bridge deck mainly centered on intersecting part of the U-shaped rib，crossbeam，and bridge deck． Along the edge of the U-shaped rib there was obvious stress concentration． In the whole bridge deck，the local stress level of the cut-outs in crossbeam was almost the highest; the maximum stress at crossbeam cut-outs was mainly concentrated at the lower circular of the cut-outs，which was one of the positions prone to fatigue damage．

Key words: orthotropic steel bridge deck, high-speed railway bridge, fatigue, stress concentration