摘要
针对加有下拉索的多塔斜拉桥这种新型的桥梁结构体系,参考某长江大桥实际工程建模,通过缩尺静力实验和有限元计算分析对比加劲索加下拉索多塔斜拉桥与常规无加劲索多塔斜拉桥的静力力学性能。试验和分析表明,加下拉索多塔斜拉桥结构体系可以有效提高结构刚度,减少塔墩根部以及主梁跨中的弯距。对比试验结果,提出了最佳的下拉索设置方案。
The static load test and the finite element analysis of the multi-tower cable-stayed bridge with tie-down cables are carried out.The test and analysis model of the bridge is created by referencing to the actual structure of a Changjiang River bridge.The static mechanical behaviors of such bridge with tie-down cables and the normal multi-tower cable-stayed bridge are comparatively analyzed by the static load test and the finite element analysis.It is shown that the structural system of the cable-stayed bridge with tie-down cables can effectively improve the structural rigidity and reduce the bending moment of the main beams,pylons and piers.According to the results,the best scheme about the location and number of tie-down cables is proposed.
出处
《土木建筑与环境工程》
CSCD
北大核心
2011年第1期43-49,共7页
Journal of Civil,Architectural & Environment Engineering
基金
强震下高墩大跨桥梁破坏机制及基于性能的减震控制研究(50908245)
抗震结构位移和滞回耗能性能评估的量化指标研究(50578167)
交通部科技教育司西部交通建设科技项目(2007319740110)
关键词
斜拉桥
下拉索
静力试验
有限元分析
力学性能
cable-stayed bridge
tie-down cable
static testing
finite element analysis
mechanical properties
