PC连续刚构桥施工控制参数敏感性分析

桥梁结构设计参数的变化可能会导致结构内力与线形有所改变,其关系到最终成桥阶段的合龙精度和结构内力与预期值的吻合程度。为了研究PC连续刚构桥施工控制参数敏感性对桥梁结构的影响,以深水河右线大桥为例,采用Midas civil软件建立该桥三维有限元模型,通过计算进行参数识别,确定其敏感性参数,以便为线形控制和应力监控提供较为准确的数据,为大桥的合龙提供技术保障。

Analysis for Sensitivity of Control Parameters in Construction of PC Continuous Steel Structure Bridges

Changes of structural design parameters of bridges may cause variations of structural internal force and alignment and concern closed precision and degree of coincidence between structural internal force and expected value in the phase of final completion.In order to study influences of the sensitivity of control parameters in construction of PC continuous steel structure bridges on bridge structures,this paper, with the Right Shenshui River Bridge as an example,establishes 3D finite element model of the bridge by means of Midas civil software,and identifies parameters via calculation to determine sensitivity parameters in order to provide accurate data for alignment control and stress supervision and to provide technical guarantee for closing of the bridge.