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以57层的小天城高层钢结构工程实例为背景,采用谐波叠加法,通过MATLAB语言编程模拟在B类地貌下的脉动风速曲线和脉动风压曲线,利用有限元软件MIDAS Gen建立结构计算模型,分析脉动风压作用下结构的顺风向风振响应。分析结果表明:有限元软件计算的结构顶点峰值加速度与加拿大规范、我国JGJ 99—98《高层民用建筑钢结构技术规程》建议的顺风向顶点峰值加速度公式的计算结果基本吻合。按我国GB 50009—2012《建筑结构荷载规范》规定,取钢结构房屋的结构阻尼比为0.02时,小天城结构顶点峰值加速度能够满足我国规范限值的要求。
Based on the example of Xiao Tiancheng high-rise steel structure of 57 storeys, the pulsating wind speed curve and the fluctuating wind pressure curve under the B-type landform are simulated by MATLAB language by using the harmonic superposition method. The finite element software MIDAS Gen is used to establish the structural calculation model , Analyzes the windward response of the windward structure under the effect of pulsating wind pressure. The analysis results show that the peak acceleration of structure apex calculated by finite element software is consistent with the calculation result of Canadian wind turbine peak-acceleration formula proposed by Canadian Code, JGJ 99-98 Technical Specification for High-rise Civil Building Steel Structure. According to China’s GB 50009-2012 “Load Code for Building Structure”, taking the structural damping ratio of steel structure house as 0.02, the peak acceleration of the apex structure of Xiaotiancheng can meet the requirements of our country’s regulation limits.