大跨度斜拉桥悬臂施工抗风措施研究  

Research on Wind Resistance Measures for Cantilever Construction of Long-Span Cable-Stayed Bridges

作　　者：林苡琛 周磊 LIN Yichen;ZHOU Lei(Department of Architectural Engineering,Hebei Vocational University of Industry and Technology,Shijiazhuang,Hebei Province,050000 China;Hangzhou East New City Construction Investment Co.,Ltd.,Hangzhou,Zhejiang Province,310000 China)

机构地区：[1]河北工业职业技术大学建筑工程系,河北石家庄050000 [2]杭州市城东新城建设投资有限公司,浙江杭州310000

出　　处：《科技资讯》2024年第24期124-126,共3页Science & Technology Information

摘　　要：大跨度斜拉桥悬臂施工过程中,在风荷载作用下,会产生较大的侧向位移,影响斜拉桥的线性与受力性质。通过在大跨度斜拉桥最大悬臂状态下布置斜拉索,在不影响斜拉桥预拱度的情况下控制其侧向位移。以某悬臂施工的斜拉桥为例,利用有限元软件建立全桥的有限元模型,加入等效计算的风荷载和斜拉索,计算分析布置斜拉索的数量及最适合的角度范围。其中,布置角度为20°~25°和30°~35°之间的2对斜拉索时,对斜拉桥侧向位移的控制程度较高,并且对斜拉桥预拱度产生的不利影响较低,为提高悬臂施工的斜拉桥施工阶段的抗风性能提供了参考。In the cantilever construction process of long-span cable-stayed bridge,significant lateral displacement will be generated under the action of wind load,which affects the linearity and mechanical properties of cable-stayed bridge.By arranging stay cables in the maximum cantilever state of the long-span cable-stayed bridge,its lat-eral displacement is controlled without affecting the pre-camber of the cable-stayed bridge as much as possible.In this paper,a cable-stayed bridge with cantilever construction is taken as an example,and the finite element model of the whole bridge is established by using finite element software,and the equivalent calculation of wind load and the designed cable-stayed cable are added to calculate and analyze the number of cables and the most suitable angle range.Among them,when two pairs of cable-stayed cables are arranged at angles between 20°~25°and 30°~35°,the control of lateral displacement of the cable-stayed bridge is relatively high and the adverse effect on the pre-camber of the cable-stayed bridge is low,which provides a reference for improving the wind resistance of the cable-stayed bridge in the construction stage of cantilever construction.

关 键 词：斜拉桥 悬臂施工 抗风措施 有限元分析 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]