【作者】 倪振华； 段旻； 谢壮宁；

【Author】 NI Zhen-hua DUAN Min XIE Zhuang-ning (Department of Civil Engineering,Shantou University,Shantou 51506 China)

【机构】 汕头大学土木工程系；

【摘要】 根据大跨屋盖不同等效目标的静风荷载分析,提出包络等效静风荷载的概念和估算方法。比较了不同等效目标的等效静风荷载产生的屋盖节点竖向位移峰值响应以及杆件内力峰值响应,说明包络等效静风荷载产生的各种响应与实际可能出现的最不利情况比较接近,因而能较全面地反映大跨屋盖结构风振响应的特征。文中还根据柱壳屋盖风洞试验结果分析了杆件内力响应背景分量和共振分量的模态分布,讨论了不同结构刚度对杆件内力共振响应及背景响应的影响。摘要内容。更多还原

【Abstract】 Based on analysis of the equivalent static wind load(ESWL) of large roofs with different equivalent objects,the concept and estimation of the envelope equivalent static wind load(EESWL) were proposed.The peak vertical displacement responses of nodes and the peak internal force responses of links produced by ESWL with different equivalent objects are compared,which illustrated that the various responses produced by the EESWL are much approximate to those occurred in the most unfavorable situation caused possibly in practice.Thus,the approach of EESWL may comprehensively reflect the nature of the wind-induced response of large roofs.Also, according to the wind tunnel tests of a cylinder roof the modal distributions of the background component and the resonance component of the internal force are analyzed and the effect of structural stiffness upon the resonance response and background response of internal forces are discussed.更多还原