点支式幕墙支撑结构风振系数计算  

The Calculation of Wind Vibration Factors on the Points-supporting Glass Curtain Wall

作　　者：陈彬[1] 吕令毅[1] 

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,南京210096

出　　处：《建筑科学》2006年第3期40-44,共5页Building Science

基　　金：国家自然科学基金资助项目(50478074);教育部优秀青年教师基金资助项目

摘　　要：目前幕墙规范中采用阵风系数来代替风振系数对幕墙支承结构进行风振计算,这与实际情况差异较大,本文为此提出了基于简支梁模型的幕墙风振系数算法。基于随机振动理论,笔者首先导出了幕墙结构随机风荷载作用下响应的具体表达式,并由此建立了点支式幕墙风振系数的简化计算公式,并通过数值仿真计算验证了该算法的有效性。该计算公式与现行荷载规范中风振系数的表达式在外形上基本一致,可方便的应用于实际设计,也可作为修订规范或规程时的参考。Recently, the wind vibration analysis in the code of glass curtain wall is based on the gust wind factor instead of the wind vibration factor, which is different from the supporting structure of point-supporting glass curtain wall, so a model of a simply supported beam was presented in this paper. Based on random vibration theory, the response of the structure under random wind load and the formula of wind vibration factor were developed. The veracity of this formula was proved by the results of numerical simulation. This formula can be conveniently applied in engineering practice for its compatibility with the formula in the load code and it also can be regarded as a reference for code revision.

关 键 词：点支式幕墙 风振系数 等效简支梁 脉动影响系数 

分 类 号：TU382[建筑科学—结构工程]