某多层框架结构加层加固设计及有限元分析  

Reinforcement Design and Finite Element Analysis of a Frame Structure with Storey-Adding

作　　者：赵雅慧 孙跃东[1] 程光福 

机构地区：[1]山东科技大学土木工程防灾减灾重点实验室,山东 青岛 [2]山东科技大学土木工程防灾减灾重点实验室,山东 青岛 中建八局第二建设有限公司,山东 济南

出　　处：《土木工程》2019年第10期1456-1463,共8页Hans Journal of Civil Engineering

摘　　要：由于某在建国际金融中心建筑加层改造的需要,造成已建4层的部分框架柱轴压比超限。结合其加层改造设计实际,介绍了加层结构框架柱的加固设计措施。在外包型钢加固法的基础上,提出了一种同时运用增大截面法及外包型钢法的综合加固方案。比较外包型钢法及综合法加固后加层结构各项力学指标,选择最优加固方案。结果表明,两种方案加固后加层结构各项力学指标均满足现行规范要求,但综合加固法同时具有增大截面加固法及外包型钢加固法的优点,不显著影响净空面积,且钢材使用量较少,经济性较好,可应用于该类加层加固工程。The storey-adding of a frame structure resulted in excessive axial compression ratio of some frame columns with 4 storeys. Combined with the actual design of an international financial center building, the reinforcement design of columns in storey-adding structures was introduced. Based on the reinforcement method of external steel-clad, a comprehensive reinforcement scheme using both enlarged section method and external steel-clad method was proposed. Then the mechanical indexes of the two schemes were compared to decide which solution is better. The results show that the mechanical indexes of the two schemes conform to the current standard. However, the comprehensive strengthening method has the advantages of increasing section reinforcement method and external steel-clad method, simultaneously, its effect on clearance area is not significant and it uses less steel which has better economy.

关 键 词：结构加层 PKPM 整体分析 延性 外包型钢加固法 综合加固法 

分 类 号：TU3[建筑科学—结构工程]