大跨屋盖结构考虑模态棍合的等效静力风荷载

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.