厦门大学学报（自然科学版）2017，Vol.56Issue(4)：611-616,6.DOI:10.6043/j.issn.0438-0479.201612005
火灾作用下预应力连续梁桥的力学性能分析
Mechanical Performance Analysis of Pre-stressed Continuous Beam Bridge Under Fire
摘要
Abstract
For the purpose of studying the effect of fire on mechanical properties of pre-stressed concrete continuous girder bridges,the boundary condition of the model is imposed by referring to data and results of the bridge fire.Constitutive models of the concrete and pre-stressed tendons are adopted and analyzed.Meanwhile,thermal parameters of the concrete and steel bars are also considered.Through the analysis of the transient temperature range of the bridge in the fire,changes of temperature according to time and space are obtained respectively.The mechanical performance of the bridge in normal temperature and fire temperature are also compared under the action of weight and lane loads,concrete,pre-stress tendons and so forth.In this paper,we have analyzed the influence of the fire on the material,and the influence of the temperature field on the stress range of the bridge is obtained.This analysis model can be used as a reference for the reparation,reinforcement,and fire resistance of the bridge.关键词
连续梁桥/预应力/火灾/温度场/应力场Key words
continuous beam bridge/pre-stress/fire/temperature field/stress field分类
建筑与水利引用本文复制引用
邵文军,宋雨..火灾作用下预应力连续梁桥的力学性能分析[J].厦门大学学报（自然科学版）,2017,56(4):611-616,6.基金项目
福建省自然科学基金青年创新项目(2016J05136) （2016J05136）
