外包钢加固对框架结构地震响应的影响  

The Effect on the Earthquake Response of External Wrapped Steel Frame Structure

作　　者：朱铁栋 常光明[2] 李文君 郑跃东 

机构地区：[1]洛阳建筑规划设计有限责任公司,河南洛阳471000 [2]皖西学院城市建设与环境系,安徽六安237012 [3]中房集团洛阳房地产开发公司,河南洛阳471000

出　　处：《皖西学院学报》2008年第5期87-89,共3页Journal of West Anhui University

基　　金：河北省交通厅科学技术项目(Y-030117)

摘　　要：为研究外包钢加固对框架结构质量、刚度、周期的影响,结合具体的工程实例,采用有限元程序SAP2000,对加固后某5层钢筋混凝土框架结构进行弹塑性分析。研究结果表明,外包钢加固会引起构件内力的重分布,弹性状态下形成刚度软弱层,抗震设计时,应从构件截面和结构整体变形两个方面来评价加固后整体结构的抗震性能。To study the effect on the mass, stiffness and period after strengthening concrete column with external steel-enclosed at bottom layer, a FEA software package SAP2000 was employed to one five-storey reinforced concrete frame structure to do the dynamic analysis on the seismic behavior. The results show that the internal force redistribution was occurred by strengthening local members with external steel-enclosed at bottom layer. Stiffness soft layer in the elastic state and strength weak layer in the plastic state were formed either. Furthermore, the double level of member section and structural deformation should be take into account in the aseismic strengthening design of the integral structure.

关 键 词：外包钢 框架结构 抗震加固 地震反应分析 

分 类 号：TU973.31[建筑科学—结构工程]