(1 广东大宸建筑设计有限公司, 广州 510627; 2 广东工业大学土木与交通工程学院, 广州 510006 )

摘要: 针对多高层混凝土结构仅下部框架柱局部混凝土强度明显低于设计要求,需要进行加固处理的情况,提出可利用局部分拆混凝土柱且用钢管混凝土柱支顶方法进行置换加固。 对几种典型加固方案优缺点进行了分析对比,所提出的加固方法可避免上部质量合格的结构被连带拆除重建,同时具有降低加固成本、缩短工期以及对原结构影响较小等优势。 结合某加固工程实例,详细介绍了此加固方法施工流程,即按顺序分部凿除缺陷混凝土,并用钢管混凝土柱内置在凿除处进行支顶;施工过程中内力分析计算结果证明了该加固方法可以满足上部轴力传递要求。 最后采用 ABAQUS 软件对施工过程进行了模拟分析,结果表明,混凝土与钢管应力均小于其设计值,加固后结构是安全的。

关键词: 分拆支顶; 加固改造; 钢筋混凝土柱; 置换加固; 有限元模拟

中图分类号:TU375. 3 文献标志码:A 文章编号:1002-848X(2022)24-0082-06

DOI:10. 19701 / j. jzjg. LS220065

Research on replacement and reinforcement technology of partial removal and support top of concrete column

LIANG Dong1, WU Jiechun2, ZHANG Baxiu1, WANG Yelu1, ZENG Shusen1

(1 Guangdong Dachen Architectural Design Co. , Ltd. , Guangzhou 510627, China; 2 School of Civil and TrafficEngineering, Guangdong University of Technology, Guangzhou 510006, China)

Abstract:In view of the situation that the local concrete strength of the lower frame column of the multi-high-rise concretestructure is obviously lower than that of the design requirements and needs to be strengthened, it is put forward that themethod of partial removal of the concrete column and the top structure supported by the concrete filled steel tube column canbe used for replacement and reinforcement. The advantages and disadvantages of several typical reinforcement schemes wereanalyzed and compared, the proposed reinforcement method can avoid the continuous demolition and reconstruction of thesuperstructure with qualified quality, at the same time, it has the advantages of reducing the reinforcement cost, shorteningthe construction period, and having less impact on the original structure. Combined with an example of a reinforcementproject, the construction process of the reinforcement method was introduced in detail, that is, defective concrete waschiseled in sequence, and the concrete filled steel tube column was built into the chiseling place to support the topstructure. The internal force analysis and calculation of the construction process proves that the reinforcement method canmeet the requirements of upper axial force transfer. Finally, ABAQUS software was used to simulate and analyze theconstruction process, and the results show that the stress of concrete and steel pipes are less than their design value, thestructure is safe after reinforcement.

Keywords: removal and support top; reinforcement and reconstruction; reinforced concrete column; replacement andreinforcement; finite element simulation

第一作者:梁冬,学士,高级工程师,硕士研究生导师,主要从事检测鉴定与加固设计工作,Email:2485614395@ qq. com。

[引用本文] 梁冬,吴杰春,张八秀,等. 混凝土柱局部分拆支顶置换加固技术研究[ J]. 建筑结构,2022,52(24):82-87,137. LIANG Dong,WU Jiechun,ZHANG Baxiu,et al. Research on replacement and reinforcement technology ofpartial removal and support top of concrete column [J]. Building Structure,2022,52(24):82-87,137.