基于预应力损失对连续刚构桥梁的敏感性分析

Sensitivity Analysis of Continuous Rigid-frame Bridge Based on Prestressing Loss

对大跨度连续刚构桥梁结构而言,明确梁段重量、混凝土收缩徐变、预应力损失等相关参数对成桥线形和内力的影响程度显得越来越重要。仅从预应力损失参数入手,结合主跨150m连续刚构桥梁,利用midasCivil2013建模,详细分析了预应力损失参数对大跨度连续刚构桥梁结构线形和内力的影响程度和规律。得到的一些结论可为更好地控制该结构的线形和内力提供有益的参考。

For the structure of long-span continuous rigid frame bridge,it is more and more important to determine the influence of beam weight,concrete shrinkage and creep,prestressing loss and other related parameters on the alignment and internal force of the finished bridge.This paper analyzes the influence degree and rule of prestressing loss parameters on the structural alignment and internal force of the long-span continuous rigid frame bridge in detail from the prestressing loss parameters,combined with the continuous rigid frame bridge with a main span of 150m and using midas Civil 2013 to establish a model.Some conclusions can provide the beneficial reference for controlling the alignment and internal force of this structure better.