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《Journal of Building Structures》 2007-01
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Equivalent static wind loads of large-span roof structures

GU Ming,ZHOU Xuanyi(State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China)  
Wind effects typically controls the design of large-span roofs.Based on the modified SRSS method,an equation for equivalent static wind loads combining mean,background and resonant components,is derived.In the equation,the background and resonant components are computed with the LRC method and the equivalent inertia force method considering modal coupling effects,respectively.The equivalent static wind loads given by the proposed method can consider modal coupling effects and have explicit physical rationale.At last,the method is applied in the roof structure of Shanghai South Railway Station to investigate its accuracy.The results obtained by the new method,which have sufficient accuracy with a maximum error of 3%,are close to ones calculated using CQC method.It also shows that SRSS method is not suitable for large-span roof structure.
【Fund】: 国家自然科学基金创新研究群体科学基金(50321803);; 国家自然科学基金(50608060);; 同济大学青年优秀人才培养行动计划联合资助
【CateGory Index】: TU312.1
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