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体育场看台结构为在一向基本对称,而在另一向不对称的框架结构。过去常用平面框架计算模型来计算这类结构的地震作用。本文结合即将颁布的新建筑抗震设计规范讨论了不对称结构地震作用计算的方法,分析了几种不同计算模型的区别。并用计算实例,闸明了用空间结构计算模型计算此类结构的必要性和采用考虑扭转地震效应的空间协同计算模型的可行性。
The structure of the stadium stands is basically symmetrical in one direction and asymmetrical in the other. In the past, plane frame calculation models were used to calculate the seismic effects of such structures. This paper discusses the method of calculating the seismic action of asymmetric structures in conjunction with the forthcoming new seismic design code for buildings and analyzes the differences between several different models. Using examples of calculations, the necessity of using a spatial structure calculation model to calculate such structures and the feasibility of using a spatial collaborative calculation model considering the effect of torsional seismicity are illustrated.