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对于体型复杂的超高层建筑,通常利用风洞进行刚性模型试验,从而得到可直接用于设计的风荷载体型系数。然而,高耸结构由于其基频较低,风与结构的耦合作用往往会导致结构振动的明显加大,对于主体结构及其维护构件的安全使用产生不利的影响。目前的规程只适用于常规的结构,而对复杂的高层结构不适用。本文在采用简化层模型假设的基础上,通过风洞试验的数据,编制了计算高层复杂建筑结构风振响应的程序。通过对一实际工程的计算分析表明,计算结果合理可靠,并已运用于该工程的设计中。
For complex high-rise buildings, wind tunnels are usually used for rigid model tests to obtain wind load shape coefficients that can be used directly for design. However, due to the low fundamental frequency of the towering structure, the coupling of the wind and structure tends to cause a significant increase in the structural vibration, which has an adverse effect on the safe use of the main structure and its maintenance components. The current procedures apply only to conventional structures but not to complex high-level structures. Based on the assumption of the simplified layer model and the wind tunnel test data, this paper has compiled a program for calculating the wind-induced vibration response of high-rise complex building structures. Through calculation and analysis of an actual project, it is shown that the calculation result is reasonable and reliable, and has been used in the design of the project.