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(廣州天晨房地產(chǎn)開發(fā)有限公司， 廣州 510250)

摘要: 混凝土長墻的開裂現(xiàn)象較為普遍，裂縫控制難度大。 對混凝土長墻的裂縫計(jì)算方法作進(jìn)一步的研究是很有意義的。 在王鐵夢提出的彈性地基上的混凝土長墻模型的基礎(chǔ)上采用約束位移方法推導(dǎo)裂縫寬度計(jì)算公式，并分析了混凝土長墻的開裂性與裂縫寬度的關(guān)系。 通過理論分析和工程案例，對裂縫寬度計(jì)算的實(shí)際位移方法、約束位移方法進(jìn)行了對比分析。 分析結(jié)果表明，實(shí)際位移方法經(jīng)過衰減系數(shù)修正得到的裂縫寬度計(jì)算結(jié)果可以較接近實(shí)測結(jié)果，但實(shí)際位移方法選取衰減系數(shù)存在人為因素，計(jì)算結(jié)果具有不確定性；約束位移方法符合混凝土長墻開裂性與裂縫寬度的關(guān)系的客觀規(guī)律，能夠直接得到較接近實(shí)測結(jié)果的裂縫寬度計(jì)算結(jié)果，更加適合在裂縫控制工程中應(yīng)用。

關(guān)鍵詞: 混凝土長墻； 裂縫寬度； 實(shí)際位移方法； 約束位移方法

中圖分類號(hào):TU375 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):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:吳偉強(qiáng)，高級工程師，一級注冊結(jié)構(gòu)工程師，主要從事建筑工程技術(shù)工作，Email:3142861239@ qq.com。

[引用本文] 吳偉強(qiáng). 混凝土長墻裂縫寬度計(jì)算方法的研究[ J]. 建筑結(jié)構(gòu)，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.