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为解决大跨屋盖结构等效静力风荷载计算中存在的多个响应目标等效问题,对多目标等效静力风荷载分析方法进行了研究。根据结构风振响应特性,基于LRC法基本原理推导了构造大跨屋盖结构多目标等效静力风荷载的基本分量,包括背景分量、共振分量及其二者的耦合项分量,该基本分量能够实现与风振响应各分量的完全对应。在此基础上,建立了多目标等效静力风荷载的求解方程,同时为限制奇异荷载的出现,引入了边界条件方程,据此求解得到了能够满足大跨屋盖结构多个响应目标的等效静力风荷载。为提高精度,还根据目标响应与静力响应间误差对求得的多目标等效静力风荷载进行修正。最后,采用所提方法对国家体育场大跨屋盖结构多目标等效静力风荷载分析计算表明,所得等效静力风荷载作用下结构静力响应与多目标响应吻合较好,验证了所提方法的有效性。
In order to solve the equivalent problem of multiple response targets in the equivalent static wind load calculation of long-span roof structures, the multi-objective equivalent static wind load analysis method is studied. According to the wind-induced response characteristics of the structure, the basic components of multi-objective equivalent static wind loads for constructing long-span roof structures are derived based on the basic principle of LRC method, including the background component, the resonance component and their coupling term components, It is possible to achieve a complete correspondence with components of the wind-induced vibration response. Based on this, the equations for solving multi-objective equivalent static wind loads are established. At the same time, in order to limit the emergence of singular loads, the boundary condition equation is introduced. Based on this, the solution to multiple response targets of long-span roof structures Equivalent static wind load. In order to improve the precision, the multi-objective equivalent static wind load obtained from the target response and the error between the static responses is also corrected. Finally, the proposed method is applied to the analysis of multi-objective equivalent static wind load of long-span roof structures in the National Stadium. The results show that the static response of the structure is in good agreement with the multi-objective response under the equivalent static wind loads. The effectiveness of the method.