大跨度矮塔斜拉桥收缩徐变效应分析  

Analysis of Shrinkage and Creep Effect in Long-Span Cable-Stayed Bridge with Low Pylon

作　　者：王立峰[1] 王子强[1] 刘龙[1] 

机构地区：[1]东北林业大学土木工程学院,黑龙江哈尔滨150040

出　　处：《公路工程》2013年第4期58-60,89,共4页Highway Engineering

基　　金：黑龙江省建设厅重点科技攻关项目(HJZ-15-2005)

摘　　要：在大跨度桥梁中,混凝土收缩徐变将会导致主梁的下挠度增大、应力发生重分布、预应力产生损失,对结构产生不利的影响,通过Midas/Civil2010有限元分析软件对大跨度矮塔斜拉桥建立模型,采用预测模型分析了在成桥状态下收缩徐变效应对主梁的应力和挠度的影响及预应力损失。同时,总结了针对大跨度矮塔斜拉桥减小收缩徐变效应的几种方法。In the long-span bridges,concrete shrinkage and creep will lead to deflection increase,stress redistribution of the main beam and prestress loss which will have negative impact on the structure.The model of long-span cable-stayed bridge with low pylon is built by finite element analysis software Midas / Civil 2010 in this article,meanwhile shrinkage and creep effect on stress and deflection of the main beam and prestress loss under finished bridge state analyzed by using predication model.At the same time,several methods for reducing shrinkage and creep of long-span cable-stayed bridge with low pylon are summarized.

关 键 词：大跨度矮塔斜拉桥 收缩徐变效应 有限元 应力 挠度 预应力损失 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]