钢筋不满足RC框架抗震要求的加固设计计算方法  

Reinforcement design and calculation method of RC frame whose reinforcement does not meet the seismic requirements

作　　者：陈嗣超 孔瑞 李延和[1,2] CHEN Sichao;KONG Rui;LI Yanhe(School of Civil Engineering,Nanjing Tech University,Nanjing 211816,China;Jiangsu Jianhua Construction Co.,Ltd.,Nanjing 210037,China)

机构地区：[1]南京工业大学土木工程学院,南京211816 [2]江苏建华建设有限公司,南京210037

出　　处：《建筑结构》2022年第S01期2137-2140,共4页Building Structure

摘　　要：RC框架纵向受力钢筋力学性能必须满足GB50011强制性条文第3.9.2条的要求。针对实际工程中存在的不满足该条文要求的情况进行分析研究,通过梁端截面的弯曲延性分析推导出梁端截面曲率延性系数的相关公式及与钢筋各性能的关系。然后在曲率延性系数分类和钢筋强度取值分析的基础上,依据钢筋性能不满足RC框架抗震要求的两种情况,提出了拉结防塌钢板、粘贴箍板加固、粘贴碳纤维布箍加固三种方法的加固设计及计算方法。最后以实际工程案例中某十一层高层结构加固设计为例,证明了本文设计计算方法的正确性和适用性。The mechanical properties of longitudinal stressed reinforcement in RC frame must meet the requirements of article 3.9.2 of GB50011 mandatory provisions.This paper analyzes and studies the situation that does not meet the requirements of this article in the actual project.Through the bending ductility analysis of the beam end section,the relevant formula of the curvature ductility coefficient of the beam end section and its relationship with the properties of the reinforcement are derived.Then,based on the classification of curvature ductility coefficient and the value analysis of reinforcement strength,according to the two cases that the reinforcement performance does not meet the seismic requirements of RC frame,the reinforcement design and calculation methods of three methods are put forward:tensile anti collapse steel plate,bonded hoop plate reinforcement and bonded carbon fiber cloth hoop reinforcement.Taking the reinforcement design of an 11 storey high-rise structure in a practical engineering case as an example,this paper proves the correctness and applicability of the design and calculation method in this paper.

关 键 词：RC框架 钢筋力学性能 结构延性 抗震性能 结构加固 

分 类 号：TU352.11[建筑科学—结构工程] TU375.4