(1 广东省二沙体育训练中心, 广州 510105; 2 广东大宸建筑设计有限公司, 广州 510627;3 广东工业大学土木与交通工程学院, 广州 510006; 4 东莞市建筑科学研究院有限公司,东莞 523809; 5 东莞市东城街道住房和城乡建设局, 东莞 523129)

摘要: 对于须进行加固的大吨位混凝土柱,当该多层框架结构仅下部框架柱局部混凝土强度明显低于设计要求时,采用外贴型钢-混凝土置换组合加固技术,可以避免上部质量合格的结构拆除重建,从而减小对工程的不利影响,同时可以降低加固成本以及缩短工期. 该技术通过外包型钢将上部荷载传递至下部结构,钢板中预留空间,通过制定合适的置换施工顺序将缺陷混凝土进行置换,严格控制施工阶段的混凝土柱内部应力,取得了良好的加固效果. 结合某加固工程实例,介绍了此组合加固方法的施工流程,并且对施工过程进行了 ABAQUS 有限元模拟分析,证明了此技术的安全可靠性,供类似混凝土结构加固改造设计和施工参考.

关键词: 混凝土柱; 外粘型钢; 混凝土置换; 组合加固; 有限元模拟

中图分类号:TU375. 3 文献标志码:A 文章编号:1002-848X(2023)02-0135-07

DOI:10. 19701 / j. jzjg. LS210350

Research and application of reinforcement technology for large tonnage concrete column

CHEN Xianghong1, LIANG Dong2, WU Jiechun3, MAI Zhendong4, WANG Yelu2,ZHANG Baxiu2, ZENG Shusen2, TAN Zhaoquan5

(1 Ersha Sports Training Center of Guangdong Province, Guangzhou 510105, China; 2 Guangdong Dachen ArchitecturalDesign Co. , Ltd. , Guangzhou 510627, China; 3 School of Civil and Traffic Engineering, Guangdong University ofTechnology, Guangzhou 510006, China; 4 Dongguan Institute of Building Research Co. , Ltd. , Donguan 523809,China; 5 Dongguan Dongcheng Subdistrict Housing and Urban-Rural Development Bureau, Donguan 523129, China)

Abstract:For large tonnage concrete column which shall be reinforced, when only local strength of concrete frame columnof the lower part of the multilayer frame structure significantly lower than the design requirements, the combinedreinforcement technology of sticking steel-concrete displacement can avoid the demolition and reconstruction of the upperstructure with qualified quality, so as to reduce the adverse impact on the project, and reduce the reinforcement cost andshorten the construction period. In this technology, the upper load is transferred to the substructure through the outersection steel, the space in the steel plate is reserved, and the defective concrete is replaced by the proper replacementconstruction sequence. The internal stress of the concrete column in the construction stage is strictly controlled, and goodreinforcement effect is achieved. Combined with a reinforcement engineering example, the construction process of thismethod was introduced, and the ABAQUS finite element simulation analysis of the construction process was carried out,which proves the safety and reliability of this technology, and can be used as a reference for the reinforcement design andconstruction of similar concrete structures.

Keywords: concrete column; sticking steel; concrete displacement; combined reinforcement; finite element simulation

第一作者:陈向红,硕士,高级工程师,主要从事结构设计工作,Email: 9581000@ qq. com.

[引用本文] 陈向红,梁冬,吴杰春,等. 大吨位混凝土柱加固技术研究及应用[ J]. 建筑结构,2023,53(2):135-141. CHEN Xianghong,LIANG Dong,WU Jiechun,et al. Research and application of reinforcement technology for largetonnage concrete column[J]. Building Structure,2023,53(2):135-141.