摘要
基于荷载响应相关法提出了一种计算大跨屋盖结构等效静力风荷载的新方法.该方法不再分别计算结构的背景响应和共振响应,而是采用完全二次型组合法直接计算结构的整体动态响应;而且这种方法能够考虑多阶模态的贡献和各阶模态响应间的耦合效应.最后,将一大跨屋盖结构(深圳市民中心)作为实际工程应用案例,计算了它的等效静力风荷载,并将其与其他方法的计算结果进行比较,以验证方法的有效性.
This paper presents a new description of the equivalent static wind loads （ESWLs） on long-span roof structures based on the load-response-correlation approach. The ESWL for a given peak displacement response is expressed in terms of the mean and dynamic components. It is noteworthy that in the proposed approach, the total dynamic response is directly calculated by the complete quadratic combination approach, which is not separated into the background and resonant responses any longer; and the contributions of multimode response and modal response correlations are taken into consideration. Finally, an extra-long-span roof structure, the world＇s longest spatial lattice structure, is considered to illustrate the determination process of the ESWLs and to demonstrate its effectiveness in the design and analysis of long-span roof structures.
出处
《力学学报》
EI
CSCD
北大核心
2007年第6期781-787,共7页
Chinese Journal of Theoretical and Applied Mechanics
基金
国家自然科学基金项目(50608037)
广东省科技计划项目(2006B37201011)
广东省自然科学基金项目(07005930)资助.~~
关键词
大跨屋盖结构
等效静力风荷载
模态耦合
风荷载
风洞试验
words long-span roof, equivalent static wind load （ESWL）, modal response correlations, wind load tunnel test
