长宽比成倍增长的建筑在地震作用下的规律研究

Study on the Law of Earthquake Action on the Building with Double Ratio of Length-Width

本文以某高层框架结构的工程实例为基础,通过只改变该建筑平面的长度,利用结构计算软件PKPM,分别计算长宽比为2倍、3倍、4倍、5倍、6倍时,各结构在地震作用下的动力特性、最大的楼层剪力及刚度、结构位移比、位移角的结果,并依据此结果得出长、宽两方向曲线的走势、量值的大小、增长的幅度及增长率等方面的数据,结合规范、计算公式及构件弯扭承载的规律,对长宽比成倍增长的此类建筑体型进行详细的分析与研究。得出随着长宽比成倍增长,结构长、宽两方向耗能、延性、刚度退化及强度等的变化规律,总结出各计算结果间的内在联系及相互间的制约关系。本文对设计师规范的理解、受力概念的形成及设计同类工程高效率的开展都起到积极的指导与推动作用。

Based on an engineering example of a high-rise frame structure,by changing only the length of the building plan,structure calculation software PKPM is used to calculate the dynamic characteristics,maximum floor shear force and stiffness,displacement ratio and displacement angle of each structure under earthquake when the ratio of length to width is 2 times,3 times,4 times,5 times and 6 times,and according to the results,the trend of the curve in the direction of length and width,the magnitude of the magnitude,the range of the increase and the increase rate,etc.are obtained.This paper analyzes and studies in detail the shape of this kind of building with the ratio of length to width increasing exponentially according to the specification,calculation formula and the law of the flexural and torsional load of the components,and concludes the law of changes in the energy consumption,ductility,stiffness degradation and strength in both directions of length and width with the increase of length-to-width ratio.The paper summarizes the inherent connection of the calculated results and the restricting relationship between them.This paper plays an active role in guiding and promoting the understanding of the designer on the code,the formation of the concept of force and the high efficient development of the design of similar projects.