自锚式悬索与斜拉组合体系桥梁使用阶段模型试验  

Model test of self-anchored suspension and cable-stayed combination bridge in service stage

作　　者：徐岳[1] 邹存俊[1] 任更锋[1] 陈万春[1] 

机构地区：[1]长安大学旧桥检测与加固技术交通行业重点实验室,陕西西安710064

出　　处：《长安大学学报（自然科学版）》2009年第2期46-50,共5页Journal of Chang’an University(Natural Science Edition)

基　　金：国家西部交通建设科技项目(200531822316);江苏省交通科学研究计划项目(06Y19b)

摘　　要：为充分了解自锚式悬索与斜拉组合体系桥梁使用阶段的受力性能,以实桥为工程依托,基于相似理论,建立了缩尺比例为1∶20的全桥试验模型,并进行了使用阶段模型试验。分析了自锚式悬索与斜拉组合体系桥梁使用阶段主梁的变形规律、主缆的线形变化特征以及主塔的受力特性。研究结果表明:使用阶段实测模型主塔最大应力增量为2.08 MPa;斜拉区受力变化对悬索区结构影响明显;全桥对称加载主跨跨中挠度比主跨对称加载减小了14.3%。In order to describe the mechanical behavior of self-anchored suspension and cablestayed combination bridge under service stage, the full bridge model with scale ratio 1 ： 20 is built based on the similarity theory. Through the model test, the deformations of main cables and main girders are analyzed. The mechanical characteristics of the tower are also studied. The results show that： the maximum increase of tower stress is 2.08 MPa in service stage; the change of force in cable-staged bridge has great effects on the deformation of self-anchored suspension; compared with the case of symmetrically loading on main span, the deflection of main span decreased by 14.3% in the case of symmetrically loading on the full bridge. 3 tabs, 9 figs, 6 refs.

关 键 词：桥梁工程 自锚式悬索 斜拉 组合结构 模型试验 空间杆系 有限元模型 

分 类 号：U448.216[建筑科学—桥梁与隧道工程]