钢骨超高强混凝土框架结构地震弹塑性分析

Earthquake Elastic-plastic Analysis on Steel Reinforced Ultra High Strength Concrete Frame Structure

为验证现行相关规范(规程)是否适用于钢骨超高强混凝土结构,以钢骨超高强混凝土框架结构为研究对象,应用大型通用有限元分析软件ABAQUS进行地震弹塑性分析。以结构自振周期、顶点位移、基底剪力、层间位移角为评价指标,讨论了建筑高度、地震波作用方向、填充墙、混凝土强度等级对框架结构地震弹塑性的影响。结果表明:1随着框架结构建筑高度增加,结构自振周期增大,顶点位移增大,基底剪力最大值增大,层间位移角增大;2与Y向地震作用相比,X向地震作用下结构自振周期较小,顶点位移最大值较小,层间位移角最大值较小,基底剪力最大值比较接近;3增加填充墙后,自振周期减小,顶点位移最大值减小,基底剪力最大值增大,层间位移角最大值减小;4柱采用较低强度等级混凝土的框架结构,自振周期增大,顶点位移最大值增大,层间位移角最大值增大,基底剪力最大值比较接近;5框架模型层间位移角计算结果满足现行规范(规程)的限值要求。钢骨超高强混凝土框架结构设计可参考现行规范(规程)的要求进行。

In order to confirm applicability of current specifications or codes for the steel reinforced ultra high strength concrete（SRUHSC）structure,the SRUHSC frame structure is taken as a research object in this paper,Earthquake elastic-plastic analysis were carried out by large universal finite element analysis software ABAQUS.Influences of building height,earthquake input directions,infilled wall,and strength grade of column concrete on earthquake elastic-plastic are analyzed on the basis of self vibration period,vertex displacement,base shear and story drift.The results show that：（1）with the increase of frame building height,natural period increases,vertex displacement increases,base shear increases and story drift increases.（2）Compared with Y direction of earthquake input,natural period decreases,vertex displacement decreases,story drift decreases and base shear agrees nearly with each other in the X direction of earthquake input.（3）After the infilled wall is set up in the SRUHSC frame,natural period decreases,vertex displacement decreases,base shear increases and story drift increases.（4）After the lower strength grade of column concrete is used in the SRUHSC frame,natural period increases,vertex displacement increases,story drift increases and base shear agrees nearly with each other.（5）Story drift calculation results of frame models meet the regulations of current specifications or codes.So SRUHSC frame can be designed on the basis of related requires.