收缩徐变对大跨度PC钢桁架混合刚构桥的影响

摘要

通过对收缩徐变作用效应下大跨度钢桁架混合钢构桥的最不利影响的研究，利用 MI-DAS模型，比较得出本桥型最不利的收缩徐变模型，并对其运营期的收缩徐变效应进行分析，得出有关钢桁架混合钢构桥收缩徐变最不利影响的一些结论。%The most unfavorable influence of the shrinkage and creep effect on large span steel truss composite steel bridge is studied.Midas model is used to compare and get the most unfavorable effects in the shrinkage and creep model of the bridge,and the shrinkage and creep effect analysis in operation period is performed to obtain some conclusions about the adverse effects of shrinkage and creep of steel truss composite steel bridge.