桥塔刚度对悬索桥的影响分析  

Influence analysis of tower stiffness on suspension bridge

作　　者：崔冰[1] 林恰[2] 于旭东[3] 唐茂林[2] 童育强[1] 

机构地区：[1]中交公路规划设计院有限公司,北京100088 [2]西南交通大学土木工程学院,成都610031 [3]浙江省舟山连岛工程建设指挥部,浙江舟山316000

出　　处：《中国工程科学》2010年第7期33-38,共6页Strategic Study of CAE

基　　金：国家科技支撑计划重点项目(2008BAGO7B04)

摘　　要：为了研究悬索桥中桥塔刚度对悬索桥整体刚度的影响,以西堠门大桥为原型,采用西南交通大学编制的桥梁非线性计算软件BNLAS建立了双塔单跨悬索桥计算模型,该计算模型中跨主缆的跨度为1650m,加劲梁为单跨简支结构体系。通过比较不同桥塔刚度(相对原型的0.7,0.8,0.9,1.0,1.1,1.2及1.3倍)情况下悬索桥受力的变化,分析桥塔刚度对悬索桥受力的影响。同时,随着越来越多的多塔多跨悬索桥的建造,笔者也研究了中间桥塔刚度变化对多塔多跨悬索桥受力的影响。In order to study the influence of tower stiffness on suspension bridge,this paper took Xihoumen Suspension Bridge as a prototype,established its finite element model by using BNLAS（Bridge Nonlinear Analysis System）,which was developed by Southwest Jiaotong University.This model is a two-mtower single-mspan suspension bridge with the main cable span of 1 650 m,and it has single-mspan simply supported girder.Then,the influence of suspension bridge structural performance with different tower stiffness was analyzed by changing the model＇s tower stiffness（0.7,0.8,0.9,1.0,1.1,1.2 and 1.3 times of original tower stiffness）.This paper also discussed the influence of mid-mtower stiffness in multi-mtower and multi-mspan suspension bridge.

关 键 词：桥塔刚度 BNLAS 多塔多跨 中间桥塔 

分 类 号：TU311.2[建筑科学—结构工程]