大跨屋盖结构脉动风振响应特性预测方法研究  

A METHOD FOR DETERMINING THE CHARACTERISTIC OF FLUCTUATING WIND-INDUCED RESPONSE OF LARGE-SPAN ROOFS

作　　者：李玉学 冯励睿[1] 李海云 田玉基 LI Yu-xue;FENG Li-rui;LI Hai-yun;TIAN Yu-ji(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province,Shijiazhuang 050043,China;Key Laboratory of Roads and Railway Engineering Safety Control of Ministry of Education,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Beijing’s Key Laboratory of Structural Wind Engineering and Urban Wind Environment,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]石家庄铁道大学土木工程学院,石家庄050043 [2]河北省风工程与风能利用工程技术创新中心,石家庄050043 [3]石家庄铁道大学道路与铁道工程安全保障省部共建教育部重点实验室,石家庄050043 [4]北京交通大学结构风工程与城市风环境北京市重点实验室,北京100044

出　　处：《工程力学》2021年第7期159-166,182,共9页Engineering Mechanics

基　　金：国家自然科学基金项目(51278314,51878040);河北省自然科学基金项目(E2019210031);中央引导地方科技发展资金项目(206Z5401G);中央支持地方高校科研团队建设项目(XMPS-24)。

摘　　要：基于结构脉动风振响应计算的三分量(背景、共振及其耦合项)完全组合思路,提出一种大跨屋盖结构脉动风振响应特性预测方法,据此实现结构脉动风振总响应的高效精准计算。引入应变能的概念,综合考虑结构所有节点上三分量响应对脉动风振总响应的贡献,定义各响应分量应变能预测系数,为了避免直接计算各响应分量具体数值,根据大跨屋盖结构各响应分量传递函数和风荷载谱特征,对各响应分量表达式进行简化处理,实现只需借助几个简单的风荷载参数和结构动力特性参数就能方便地得到各响应分量应变能预测系数。根据各响应分量应变能预测系数取值情况,将大跨屋盖结构脉动风振响应特性划分为I~VI类,在此基础上,制定与风振响应特性类型相对应的脉动风振总响应组合求解策略。以国家网球中心莲花球场屋盖结构为例,进行结构脉动风振响应特性类型预测以及风振响应组合计算。结果表明:所提方法能够方便地预测结构脉动风振响应特性类型;据此组合计算的脉动风振总响应与精确值吻合较好。Based on the idea of fully combining the three components of fluctuating wind-induced response(background,resonant and their coupling term),a method for determining the characteristic of fluctuating wind-induced response of large-span roofs is proposed,which is used to calculate the fluctuating wind-induced response accurately and efficiently.The concept of strain energy is introduced,and the contributions of each fluctuating wind-induced response component to the total response at all structural nodes are considered and the strain energy prediction coefficients of each response component are defined.In order to avoid directly calculating the specific value of each response component,the expression of each response component is simplified according to the characteristics of the transfer function and wind load spectrum of each response component,so that the strain energy prediction coefficients could be obtained by a few wind load parameters and structural dynamic characteristic parameters.According to the value of strain energy prediction coefficients,the characteristic categories of fluctuating wind-induced response of large-span roofs are divided into I-VI;on this basis,the combining principle for the total fluctuating wind-induced response is developed.Taking the Lotus court roof as an example,the characteristic type of fluctuating wind-induced response is determined and the total fluctuating wind-induced response is obtained.The results indicate that the proposed method can determine the characteristic type of fluctuating wind-induced response conveniently,and the combined total response is in good agreement with the accurate value.

关 键 词：大跨屋盖结构 脉动风振响应特性 应变能 预测系数 三分量响应组合 

分 类 号：TU393.3[建筑科学—结构工程] TU312