单层柱面网壳的风振响应

华南理工大学学报（自然科学版） ›› 2006, Vol. 34 ›› Issue (7): 69-76.

单层柱面网壳的风振响应

魏德敏¹ 边建烽²

1．华南理工大学建筑学院，广东广州 510640；2．广州珠江外资建筑设计院，广东广州 510060

收稿日期:2005-09-12 出版日期:2006-07-25 发布日期:2006-07-25
通信作者: 魏德敏(1955-)，女，教授，博士生导师，主要从事土木工程结构的非线性分析及防灾减灾的研究． E-mail:dmwei@scut.edu.cn
作者简介:魏德敏(1955-)，女，教授，博士生导师，主要从事土木工程结构的非线性分析及防灾减灾的研究．
基金资助:
广东省自然科学基金资助项目(020940)

Wind-Induced Vibration Response of Single-Layer Cylindrical Reticulated Shell Structures

Wei De-min¹ Bian Jian-feng²

1.College of Architecture and Civil Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China; 2.Guangzhou Pearl River Foreign Investment Architectural Designing Institute,Guangzhou 510060,Guangdong,China

Received:2005-09-12 Online:2006-07-25 Published:2006-07-25
Contact: 魏德敏(1955-)，女，教授，博士生导师，主要从事土木工程结构的非线性分析及防灾减灾的研究． E-mail:dmwei@scut.edu.cn
About author:魏德敏(1955-)，女，教授，博士生导师，主要从事土木工程结构的非线性分析及防灾减灾的研究．
Supported by:
广东省自然科学基金资助项目(020940)

摘要/Abstract

摘要： 在脉动风作用下单层柱面网壳结构的风振响应与一般高层高耸建筑的响应有较大的区别，其主要贡献模态一般不是第一模态，而往往分布在前数十阶模态．寻找对网壳结构风振响应有主要贡献的模态具有重要的意义．文中采用考虑高阶振型共振响应的综合模态法，计算了单层柱面网壳的风振响应，分析了自振频率、阻尼比等因素对共振响应的贡献，讨论了计算综合模态时所需的振型数；针对结构自振频率的密集性，揭示了考虑振型互相关性的必要性、影响振型互相关性的因素和计算振型互相关性所需的振型数，并给出了具体结构的位移风振系数和内力风振系数．

关键词: 柱面网壳结构, 背景响应, 共振响应, 综合模态, 模态互相关性

Abstract:

Under the fluctuating wind load,the wind-induced vibration response of the single-layer reticulated shell structures is different from that of tall buildings,because the main mode contributory to the dynamic response is usually not the 1st vibration mode,but the combination of the first tens of modes. Hence,it is necessary to find the contributory modes to the response. In this paper,the quasi-mode method considering the resonance response of the high modes is used to analyze the wind-induced vibration response of single-layer cylindrical reticulated shells,the effects of such factors as the self-vibration frequency and the damp ratio on the resonance response are investigated,and the vibration mode number needed for calculating the quasi-mode is discussed. The results show that the mode
cross-correlation must be taken into consideration because the self-vibration frequencies are very close to one ano-ther. Moreover,the factors to influence the mode cross-correlation and the vibration mode number needed for calcu-lating the cross-correlation are presented,followed by the wind-induced vibration coefficients of the displacement and the axial force for a practical single-layer cylindrical reticulated shell.

Key words: cylindrical reticulated shell structure, background response, resonance response, quasi-mode, mode cross-correlation

魏德敏边建烽. 单层柱面网壳的风振响应[J]. 华南理工大学学报（自然科学版）, 2006, 34(7): 69-76.

Wei De-min Bian Jian-feng. Wind-Induced Vibration Response of Single-Layer Cylindrical Reticulated Shell Structures[J]. Journal of South China University of Technology (Natural Science Edition), 2006, 34(7): 69-76.