大跨平屋盖的多目标等效静风荷载研究
Equivalent static wind loads for multiple targets of long span plane roofs
Equivalent static wind loads (ESWL) for multiple equivalent targets are studied for long-span plane trusses and spatial trusses, and these multiple equivalent targets include peak wind-induced response of all displacements of key nodes and all member stresses. For these two kinds of structures, the resonant response is much bigger than the background response and the 1st vibration mode has the dominant contribution to fluctuating wind-induced response. Therefore, the inertial force of this dominant vibration mode is chosen to express the ESWL for multiple equivalent targets. With this method, the effects of wind loading factors and structural factors on ESWLs of long span plane trusses and spatial trusses are investigated, and tables of ESWLs are proposed for engineering structural design. Structural responses of all structural members and all key nodes under ESWLs agree well with actual peak responses.
大跨屋盖结构 / 等效静风荷载 / 风振响应 / 平面桁架 / 空间网架 {{custom_keyword}} /
long span roof structures / equivalent static wind loads / wind-induced response / plane trusses / spatial trussesE-mail: chenbohrb@163.com {{custom_keyword}} /
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