(广州天晨房地产开发有限公司， 广州 510250)

摘要: 混凝土长墙的开裂现象较为普遍，裂缝控制难度大。 对混凝土长墙的裂缝计算方法作进一步的研究是很有意义的。 在王铁梦提出的弹性地基上的混凝土长墙模型的基础上采用约束位移方法推导裂缝宽度计算公式，并分析了混凝土长墙的开裂性与裂缝宽度的关系。 通过理论分析和工程案例，对裂缝宽度计算的实际位移方法、约束位移方法进行了对比分析。 分析结果表明，实际位移方法经过衰减系数修正得到的裂缝宽度计算结果可以较接近实测结果，但实际位移方法选取衰减系数存在人为因素，计算结果具有不确定性；约束位移方法符合混凝土长墙开裂性与裂缝宽度的关系的客观规律，能够直接得到较接近实测结果的裂缝宽度计算结果，更加适合在裂缝控制工程中应用。

关键词: 混凝土长墙； 裂缝宽度； 实际位移方法； 约束位移方法

中图分类号:TU375 文献标志码:A 文章编号:1002￣848X(2022)04￣0121￣05

DOI:10. 19701 / j.jzjg.20200348

Study on calculation method of crack width of concrete long wall

WU Weiqiang

(Guangzhou Tianchen Real Estate Development Co.， Ltd.， Guangzhou 510250， China)

Abstract: Cracking phenomenon of a concrete long wall is common， and crack control is difficult. It is meaningful tofurther study the crack calculation method of the concrete long wall. On the basis of Wang Tiemeng model of the concretelong wall on elastic foundation， the calculation formula of crack width was derived by using the constrained displacementmethod， and the relationship between cracking and crack width of the concrete long wall was analyzed. Through theoreticalanalysis and engineering cases， actual displacement method and constrained displacement method for calculating crackwidth were compared and analyzed. The analysis results show that the crack width calculation results obtained by actualdisplacement method after attenuation coefficient correction can be closer to the measured results， but there are artificialfactors in selecting the attenuation coefficient by actual displacement method， and the calculation results are uncertain. Theconstrained displacement method accords with the objective law of the relationship between the cracking and the crack widthof the concrete long wall， which can directly obtain the crack width calculation results close to the measured results， whichis more suitable for application in crack control engineering.

Keywords:concrete long wall； crack width； actual displacement method； constrained displacement method

第一作者:吴伟强，高级工程师，一级注册结构工程师，主要从事建筑工程技术工作，Email:3142861239@ qq.com。

[引用本文] 吴伟强. 混凝土长墙裂缝宽度计算方法的研究[ J]. 建筑结构，2022，52( 4):121￣125. WU Weiqiang.Study on calculation method of crack width of concrete long wall [J]. Building Structure，2022，52(4):121￣125.