体育场看台结构地震作用的计算

Calculation of Seismic Effects on Stadium Stand Structures

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 frame structures of stadium stands are generally symmetrical in one direction and unsymmetrical in the other direction. Usually planar frame models were used for the calculation of seismic effects on such structures. In this paper, referring to the requirements for calculation of seismic effects on unsymmetrical structures as stipulated in the new Building Design Code for Earthquake Resistance soon to be published, differences in various models with computation examples are presented. The necessity of using space frame models with three-dimension in calculation of such structures and the feasibility of using space interaction models in consideration of torsional earthquake effects are explained.