超高层建筑高位转换层型钢混凝土转换节点强度分析与加固  

Strength analysis and reinforcement of steel reinforced concrete transition joints of high-level transition floors in super high-rise building

作　　者：李兆峰[1] 牛忠荣[1] 吴健安 LI Zhaofeng;NIU Zhongrong;WU Jian'an(College of Civil Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学土木与水利工程学院,合肥230009

出　　处：《建筑结构》2020年第24期61-68,共8页Building Structure

基　　金：国家自然科学基金项目(11272111)。

摘　　要：以国家金融信息大厦超高层建筑为工程背景,其建筑转换层设在270.6m处,采用3个尺度对转换层核心筒部位的型钢混凝土转换节点在强地震工况下的节点应力状态进行分析。先对大厦整体结构在地震作用下进行力学分析,根据整体结构的地震响应力学分析结果,建立转换层结构力学模型,施加相应的位移和应力边界条件。再将型钢混凝土转换节点模型从转换层力学模型中隔离,采用有限元法对型钢混凝土转换节点进行应力强度分析,通过3个尺度模型的力学分析结果对比可知,所建立的转换节点力学模型及有限元计算结果是可靠的,根据计算结果对节点局部高度应力集中区域提出了加固建议,经加固后的力学分析可知,转换节点的应力水平满足设计要求,从而为该类型的节点设计及力学分析方法提供参考。Taking the super high-rise building of the National Financial Information Building as the engineering background, the building transition floor is set at 270.6 m. The strategy of three scales for the core tube of the transition floor was used to analyze the working stress states of the steel reinforced concrete(SRC) transition floor joints subjected to strong earthquake conditions. Firstly, the mechanical analysis of the overall structure under earthquake action was carried out. According to the results of the seismic response mechanics analysis of the overall structure, the mechanical model of the transition floor structure was established, and the corresponding displacement and stress boundary conditions were applied. Then SRC transition joints model was isolated from the mechanical model of the transition floor, and the finite element method was used to analyze the stress intensity of SRC transition joints. Through the comparison of the mechanical analysis results of the three scale models, it can be seen that the established mechanical model of the transition node and the finite element calculation results are reliable. According to the calculation results, reinforcement suggestions are proposed for the local high stress concentration area of the node. The mechanical analysis after reinforcement shows that the stress level of the transition node meets the design requirements, so as to provide reference for this type of joint design and mechanical analysis method.

关 键 词：超高层建筑 高位转换层 型钢混凝土 转换节点 应力强度分析 加固 

分 类 号：TU973.2[建筑科学—结构工程]