多孔混凝土砖砌体材料抗弯性能试验研究

Q3 Engineering
C. Pu, X. Li, X. Gu
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引用次数: 2

摘要

在剪切试验的基础上,系统研究了穿孔混凝土砖砌体材料的抗剪性能,推导了材料抗剪强度的计算公式,提出了穿孔混凝土砖砌体在剪切作用下砂浆缝的本构模型,为《混凝土穿孔砖砌体建筑技术规范》(CECS257:2009)的制定提供了基础参考。结果表明:在相同砌体强度下,多孔混凝土砖砌体的抗剪强度高于烧制多孔砖砌体。对于不同类型的砖,砌体材料的抗剪强度略有不同,施工中有初始压应力砌体的抗剪强度低于无初始压应力砌体的抗剪强度,有加载历史砌体的抗剪强度高于无加载历史砌体的抗剪强度,在一定范围内可用Mohr-Coulomb准则确定砌体的抗剪强度。结果还表明,剪切应力-剪切应变曲线的初始斜率较大,当应力接近极限应力时,应变迅速增大,但应力几乎为常数。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental study on flexural properties of perforated concrete brick masonry materials
Based on shear tests,the shear behavior of perforated concrete brick masonry materials was systematically studied,a calculation equation for the shear strength of the material was deduced,a constitutive model for the mortar joint in perforated concrete brick masonry under shear was proposed,which provided the basic references for the development of "Technical Specifications for Concrete Perforated Brick Masonry Buildings"(CECS257:2009).The results indicate that the shear strength of perforated concrete brick masonry is higher than that of fired perforated brick masonry with the same brick and mortar strength.For the different type of bricks the shear strength of masonry materials are a little bit different,the shear strength of the masonry with initial compressive stress in construction is lower than that of the masonry without initial compressive stress,the shear strength of the masonry with loading history is higher than that of the masonry without loading history,and the shear strength of masonry under compression can be determined with the Mohr-Coulomb criterion in a certain range.The results also indicate that the initial slop of the shear stress-shear strain curve is big;when the stress approaches the ultimate stress,the strain increases rapidly,but the stress is almost a constant.
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来源期刊
Jianzhu Cailiao Xuebao/Journal of Building Materials
Jianzhu Cailiao Xuebao/Journal of Building Materials Engineering-Building and Construction
CiteScore
2.70
自引率
0.00%
发文量
3652
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