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针对大跨屋盖结构等效静力风荷载计算需要兼顾多个响应控制目标问题,基于能量等效,提出了大跨屋盖结构风致共振响应多目标等效静力风荷载分析方法。根据结构风致共振响应特点,从保证结构整体安全的角度,确定以结构风振过程中各节点吸收和转化的风动能达到极值时刻为等效目标,据此最不利情况,推导了共振响应多目标等效静力风荷载表达式。最后,将该方法应用于北京奥运网球中心屋盖结构共振响应等效静力风荷载计算,结果表明:该等效静力风荷载下的结构静力响应与频域分析得到的结构动力响应极值吻合较好,验证了所提方法的有效性和工程实用性。
For the equivalent static wind load calculation of long-span roof structures, it is necessary to take account of multiple response control objectives. Based on the energy equivalence, a multi-objective equivalent static wind load analysis method for wind induced resonance response of long-span roof structures is proposed. According to the characteristic of wind-induced resonance, from the point of view of ensuring the overall safety of the structure, it is determined that the wind-induced kinetic energy absorbed and converted by each node in the process of wind-induced vibration is equivalent to the extreme value. Based on the most unfavorable situation, Target equivalent static wind load expression. Finally, the method is applied to the equivalent static wind load calculation of the roof resonance response of the Beijing Olympic tennis center. The results show that the static response of the structure under the equivalent static wind load and the dynamic response of the structural dynamic response pole The values agree well, which verifies the effectiveness of the proposed method and engineering practicability.