空间结构等效静力风荷载求算的通用方法  

Unified method for calculating effective static wind loads on spatial structures

作　　者：石俊阳 秦玮峰 杨肖悦 谢霁明[1] SHI Jun-yang;QIN Wei-feng;YANG Xiao-yue;XIE Ji-ming(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou310058,China)

机构地区：[1]浙江大学建筑工程学院,浙江杭州310058

出　　处：《空间结构》2020年第3期16-23,共8页Spatial Structures

基　　金：国家自然科学基金项目(51578505).

摘　　要：为解决各种类型的空间结构在确定设计风荷载时的复杂性问题,提出了一种基于风洞试验同步测压数据求算等效静力风荷载的通用方法.该方法从荷载效应的等效原理出发,由此得出的等效静力风荷载基于风压包络面定义的合理性,具有很好的通用性.通过采用更为精确的相关谱模态组合法(CS模态组合法)计算惯性荷载,并结合针对荷载效应风向折减的超越概率分析,使计算结果更为精确合理.这一方法通过对风荷载中的平均分量、背景分量以及惯性分量分别计算后叠加的流程,还可以辅助结构的抗风优化设计,特别适用于评估设计风荷载对结构特性调整的敏感度.通过对两个具体应用实例的分析,证明了这一方法的通用性.To solve the complexity of design wind loads on various types of spatial structures,a unified method based on synchronous pressure measurements of wind tunnel tests is proposed to calculate the effective static wind loads on spatial structures.The method is based on the principle of equivalent load effects,and the resulting effective static wind loads satisfy the rationality requirements in terms of wind pressure envelope,adaptability is the main feature of the propose method.By using a more accurate CS modal combination method in the calculation of inertial loads and combining upcrossing analysis in the calculation of wind directionality for load effects,the results are more accurate and reasonable.With this method,the mean components,the background components and the inertia components of the design wind loads are calculated separately and then superimposed together.As such,the method can also be used to assist the structural optimization design for wind effects,especially in the sensitivity assessment of wind loads to structural property changes.To illustrate the application of this method,two case studies are given which verify the adaptability of the proposed method.

关 键 词：空间结构 等效静力风荷载 荷载效应 影响函数 风压包络 同步测压试验 

分 类 号：TU312.1[建筑科学—结构工程]