采用设缝双肢墩的多塔斜拉桥温度效应分析  

Temperature Effect Analysis for Multispan Cable-Stayed Bridges with Isolation Joint Double Limb Piers

作　　者：党晓冰 王解军[1] 黄佳[1] 陈伯望[1] DANG Xiaobing;WANG Jiejun;HUANG Jia;CHEN Bowang(College of Civil Engineering,Central South University of Forestry and Technology,Changsha,Hunan 410004,China)

机构地区：[1]中南林业科技大学土木工程学院,湖南长沙410004

出　　处：《公路工程》2018年第2期182-186,205,共6页Highway Engineering

基　　金：湖南省交通科技计划项目(201526)

摘　　要：对于塔梁墩固结的多塔斜拉桥刚构体系,为了适应其主梁因温度引起的纵向变形,并减小桥梁结构温度应力,提出新型设缝双肢墩桥墩形式。建立采用整体墩和设缝双肢墩的两种斜拉桥有限元计算模型,分析比较温度作用下,主梁、索塔的位移及主梁与塔墩应力,结果表明在不同的温度荷载组合下,设缝双肢墩多塔斜拉桥主梁和桥墩的位移及应力状况均优于整体墩斜拉桥。分析结果可给设缝双肢墩斜拉桥设计提供参考。For multispan cable-stayed bridge rigid frame system with mutually consolidated towers-beams-piers,in order to adapt to the longitudinal deformation of the beam caused by the temperature,and reduce the temperature stress of bridge structure,a new type of bridge pier with isolation joint was introduced in this paper.The finite element model of two kinds of cable-stayed bridges with integral piers and jointed piers is established,and the displacement of the main beam and the tower,the stress of the main beam and the tower pier are analyzed and compared under the temperature load.The results show that,under different temperature loading combinations,the stress and the displacement of the main beam and pier of multispan cable-stayed bridges with isolation joint double limb piers,are better than the integral piers cable-stayed bridge.The analysis results can provide reference for the design of cable-stayed bridges with isolation joint double limb piers.

关 键 词：多塔斜拉桥刚构体系 设缝双肢墩 温度效应 有限元法 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]