烧结污泥页岩多孔砖砌体本构关系

发布时间：2018-04-12 19:27

本文选题：本构关系 + 损伤　；参考：《建筑结构》2017年07期

【摘要】：为研究不同污泥掺量下烧结污泥页岩多孔砖砌体受压变形性能、抗压强度、峰值应变和弹性模量,建立本构关系,对用两种水泥砂浆和四种污泥掺量的烧结污泥页岩多孔砖砌筑的36个试件进行轴压试验,实测了试件的应力-应变曲线、抗压强度、峰值应变和弹性模量。结果表明,烧结污泥页岩多孔砖砌体抗压强度和弹性模量随污泥掺量的增加而逐渐降低,并低于普通页岩烧结多孔砖,峰值应变与普通页岩烧结多孔砖相同。通过分析砌体受压破坏的过程和实测应力-应变曲线,结合砌体的力学损伤,将砌体损伤演化方程考虑为一个含初始损伤值的损伤函数,以此建立了砌体受压的本构关系模型。该模型所确定的烧结污泥多孔砖砌体的本构关系曲线不仅与试验数据吻合,还克服了已有本构关系的不足。对于不同材料的砌体,结合抗压试验确定模型中的相关参数,可得到相应的本构关系表达式。
[Abstract]:In order to study the compressive deformation, compressive strength, peak strain and elastic modulus of sintered sludge shale porous brick masonry with different sludge content, the constitutive relationship was established.Axial compression tests were carried out on 36 sintered sludge shale porous brick masonry specimens with two kinds of cement mortar and four kinds of sludge. The stress-strain curves, compressive strength, peak strain and elastic modulus of the specimens were measured.The results show that the compressive strength and elastic modulus of sintered sludge shale porous brick masonry decrease gradually with the increase of sludge content, and are lower than that of ordinary shale sintered porous brick, and the peak strain is the same as that of ordinary shale sintered porous brick.By analyzing the process of masonry compressive failure and the measured stress-strain curve and combining the mechanical damage of masonry, the damage evolution equation of masonry is considered as a damage function with initial damage value, and the constitutive relation model of masonry under compression is established.The constitutive relation curve of sintered sludge porous brick masonry determined by this model not only coincides with the experimental data, but also overcomes the shortcomings of the existing constitutive relations.For masonry with different materials, the corresponding constitutive expression can be obtained by determining the relevant parameters of the model in combination with compressive tests.
【作者单位】：广西科技大学土木建筑工程学院;成都理工大学工程技术学院土木工程系;广西荣泰建筑设计有限责任公司;
【基金】：广西重点研发计划项目(桂科攻AB16380341)
【分类号】：TU522

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