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요약정보
公路大跨度斜拉桥独柱钢塔整体稳定性分析
Resource Type
Academic Journal
Authors
左志超
;
郑凯锋
;
陈婧雯
Source
四川建筑 / Sichuan Architecture
. 42(5):145-152
Subject
斜拉桥
钢桥塔
运营阶段
整体稳定性
有限元
Language
Chinese
ISSN
1007-8983
Online Access
Find it @ DONGA
초록
大跨度斜拉桥独柱形钢桥塔由于具有长细比大、壁板较薄等特点,其运营阶段的整体稳定是结构设计的关键问题之一.为研究独柱形钢桥塔在恒载、风荷载和车辆荷载作用下的整体稳定性,以一座主桥跨径布置为(50+180+500+180+50)m的双塔斜拉桥为研究对象,采用Midas Civil 2019建立全桥空间有限元模型,计算分析桥塔在运营阶段的第一类和第二类稳定性.结果表明,在典型荷载工况下,该桥第一类失稳均以主梁和桥塔纵向失稳为主,稳定安全系数为12.21,风荷载对第一类稳定并不起控制作用;计入几何非线性影响的桥塔的第二类稳定安全系数为8.77,但稳定性系数为5.52时,桥塔局部受力已达到屈服强度.
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