龙华松花江特大桥结构参数敏感性分析

为了研究预应力混凝土刚构—连续组合梁桥各参数对结构线形的影响程度,对龙华松花江特大桥主桥进行了最大悬臂阶段、成桥阶段和正常使用阶段结构参数敏感性分析。采用有限元分析软件,对线形影响较大的5个参数进行主跨跨中及零号块根部挠度值的分析,得到了各主要设计参数变化时,主跨跨中及零号块根部挠度值的影响值。结果表明:主梁自重、非均匀温度变化、混凝土收缩徐变为敏感性参数;主梁的弹性模量、预应力孔道摩擦系数μ和局部偏差系数k产生的预应力损失则属于非敏感性参数。

Parametric Sensitivity Analysis of Longhua Songhua River Super-sized Bridge

A study was conducted to discuss the sensitivity of structural design parameters at the longest cantilever construction stage,the completion and operation stage,and the normal usage stage using the main bridge of Longhua Songhua super-sized bridge as a testing object,aiming to find out the effects of the parameters for prestressed concrete continuous rigid frame bridge on line shape.Five parameters that have considerable influences on line shape were analyzed in terms of the deflection of the mid-span and t...