独塔斜拉桥施工阶段抖振响应及抑振分析  

Analysis of buffeting response and vibration-restraining for cable-stayed bridge with single tower at construction stage

作　　者：黄海新[1] 张哲[1] 郑江敏[2] 袁全[3] 

机构地区：[1]大连理工大学桥梁研究所,辽宁大连116023 [2]江山市市政工程管理处,浙江江山324100 [3]河北工业大学土木工程学院,天津300401

出　　处：《辽宁工程技术大学学报（自然科学版）》2007年第4期547-549,共3页Journal of Liaoning Technical University (Natural Science)

基　　金：交通部西部交通建设科技基金资助项目(200631882350)

摘　　要：针对斜拉桥在最大双悬臂阶段的风致振动响应问题,通过考虑气动导纳和气动弹性效应对基于准定常理论的抖振力和自激力表达式进行了修正,并用谐波合成法模拟得到了具有空间相关性的脉动风荷载样本,继而对金马大桥在最大双悬臂阶段的抖振响应进行了分析,并对风载内力和人体舒适度进行了评价。结果表明,该桥的抖振响应对施工人员影响较小。同时,分析表明增设抗风临时拉索是一种简单有效的抑振措施。In view of the problem of buffeting response of cable-stayed bridge at max twin cantilevers stage, the formulations of buffeting and self-excited forces based on quasi-steady assumptions are modified by considering aerodynamic admittance and memory effect and the turbulent wind load samples which are of spatial correlation property are simulated with cosine wave superposition method. On this basis, analysis of buffeting response for Jinma Bridge at maximum twin cantilevers stage during construction is performed and wind load internal forces and the degree of human comfort is discussed as well. The results show that buffeting response has no effects on constructors. Meanwhile, the buffeting-restraining measure setting temporary wind-resistance cables is analyzed and proved to be simple, efficient and practicable during construction.

关 键 词：斜拉桥 抖振 时域分析 

分 类 号：TU311.3[建筑科学—结构工程]