桥面不平整度对桥梁冲击系数的影响研究

摘要

The bridge impact coefficient influenced by roughness of bridge floor based on finite element method. Results indicate that roughness prominently influenced on the bridge impact coefficient. It relates to the bridge width-span ratio. The impact coefficient changed with width-span ratio obviously as width-span ratio less than 1. 0. While the impact coefficient changed slow down as width-span ratio between 2. 0 and 3. 0,and the influence of bridge width-span ratio on the impact coefficient could be ignore.%采用有限元方法，研究了桥面不平整度对不同跨度及宽度简支梁桥冲击系数的影响，结果表明，桥面不平整对桥梁冲击系数影响显著，且与桥梁的宽跨比有关；当宽跨比小于1.0，桥面不平整时冲击系数随着桥梁宽跨比变化明显，而当宽跨比在2.0～3.0之间时，冲击系数的变化趋势减缓，相对稳定，宽跨比的影响可以忽略。