计入风重耦合效应高耸结构顺风向响应分析

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英文篇名：Analysis of the downwind response of high-rise structures taking into account the wind-gravity coupling effect 作者：钟振宇 ; 楼文娟 英文作者：ZHONG Zhenyu;LOU Wenjuan;School of Civil Engineering and Architecture,Zhejiang Industry Polytechnic College;College of Civil Engineering and Architecture,Zhejiang University; 关键词：超高层建筑 ; 风重耦合效应 ; 风振 ; 非线性振动 英文关键词：high-rising structure;;wind-gravity coupling effect(WGCE);;wind vibration;;non-linear vibration 中文刊名：HEBG 英文刊名：Journal of Harbin Engineering University 机构：浙江工业职业技术学院建筑工程学院;浙江大学建筑工程学院; 出版日期：2015-04-28 08:54 出版单位：哈尔滨工程大学学报 年：2015 期：v.36;No.212 基金：国家自然科学基金资助项目(51378468) 语种：中文; 页：HEBG201506007 页数：4 CN：06 ISSN：23-1390/U 分类号：29-32

摘要

风重耦合效应是指高耸结构侧向变形受到风和重力共同影响而引起结构静力和动力响应发生变化的现象。为了研究风重耦合效应的作用机理,利用结构几何非线性动力方程和等效线性随机振动理论求解。计算结果表明,重刚比是影响风重耦合效应最重要的参数,其值越大,结构振动固有频率越小,结构响应越大。当结构重刚比较小时,地面粗糙度、结构固有阻尼和平均风速对风重耦合效应影响不大。当重刚比较大时,风重耦合效应随结构固有阻尼和平均风速的增大而减小。
        Wind-gravity coupling effect( WGCE) is a phenomenon that static and dynamic responses of high-rising structure acted by wind and gravity are changed. In order to study mechanism of WGCE,the method about nonlinear dynamic equation and equivalent linear random vibration theory is used to solve the problem. Calculated result indicates that gravity-rigidity ratio is an important parameter for WGCE. Natural frequency of structure decreases and response of structure increases with gravity-rigidity ratio of structure. Ground roughness,natural damping and average wind speed little impact on WGCE as value of gravity-rigidity ratio is small. While value of gravity-rigidity ratio is large,WGCE decreases with natural damping and average wind speed.

引文

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