矩形孔烧结页岩砖砌体基本力学性能研究

发布时间：2018-04-20 20:27

本文选题：矩形孔烧结页岩砖 + 建筑技术规程　；参考：《广西科技大学》2015年硕士论文

【摘要】：在国家“禁实”与发展新型、绿色、节能墙体材料的战略决策大背景下,烧结页岩多孔砖成功取代了粘土砖。但因为页岩矿藏的分布存在地域差别,导致针对页岩制砖的理论研究起步较晚,尚无对应的技术规程指导生产与应用,阻碍了页岩砖产业在实际工程中的发展,因此广西科技大学组织编制《烧结页岩多孔砖建筑技术规程》,并成功立项广西科技厅项目(桂科攻0861001-7),开始了圆形孔烧结页岩砖砌体的基本力学性能试验研究。国家新标准《烧结多孔砖和多孔砖砌块》(GB13544-2011)于2012年4月1日正式施行,其中对于多孔砖一个主要的变化就是取消了圆形孔和其他孔形的砖体,规定采用矩形孔砖体,目前,国内对于矩形孔烧结页岩砖及其砌体研究甚少。为完成“《烧结页岩多孔砖建筑技术规程》”及“《烧结页岩多孔砖建筑技术规程》的提升与完善”,本文将对矩形孔烧结页岩砖砌体进行基本力学性能试验研究。本文就以下方面对矩形孔烧结页岩砖砌体进行了试验研究:1.通过砌体轴心抗压试验研究,分析砌体破坏特征,得到砌体抗压强度值;通过对试验数据回归分析,结合规范,提出矩形孔烧结页岩砖砌体抗压强度建议计算表达式。2.拟合目标砌体应力-应变数据,得到目标砌体本构曲线上升段表达式;通过试验数据的处理,提出目标砌体的弹性模量计算表达式及其泊松比建议值,分析砌体的弹性模量与泊松比值随荷载的变化趋势。3.通过砌体通缝抗剪试验研究,分析砌体受剪力破坏特征,得到其抗剪强度,并提出矩形孔烧结页岩砖砌体通缝抗剪强度建议计算表达式;分析砂浆键在提高砌体抗剪强度中起到的积极作用本文在试验的基础上,探讨了矩形孔烧结页岩砖砌体的基本力学性能,为“《烧结页岩多孔砖建筑技术规程》”及“《烧结页岩多孔砖建筑技术规程》的提升与完善”提供了理论依据,以便于更好地指导其在实际工程中的应用及推广。
[Abstract]:Under the background of the national "ban" and the development of new, green and energy-saving wall materials, the sintered shale porous brick has succeeded in replacing the clay brick. However, due to the regional differences in the distribution of shale mineral deposits, the theoretical research on shale brick started late, and there is no corresponding technical regulation to guide production and application, which hinders the development of shale brick industry in practical engineering. Therefore, Guangxi University of Science and Technology organized and compiled the Building Technical Specification for Sintered Shale porous Brick, and successfully set up the project of Guangxi Science and Technology Department (Guicke attack 0861001-7), and began the experimental study on the basic mechanical properties of circular hole sintered shale brick masonry. The new national standard "sintered porous brick and porous brick block" (GB13544-2011) was put into effect on April 1, 2012. One of the main changes for porous brick is the elimination of round hole and other perforated brick bodies, and the adoption of rectangular hole brick body. At present, There is little research on sintered shale brick with rectangular hole and its masonry in China. In order to complete the promotion and perfection of "Building Technical Specification for Sintered Shale porous Brick" and "Sintered Shale porous Brick Building Technical Specification", the basic mechanical properties of sintered shale brick masonry with rectangular holes are studied in this paper. In this paper, an experimental study on sintered shale brick masonry with rectangular holes has been carried out in the following aspects: 1. Through the experimental study of axial compression of masonry, the characteristics of masonry failure are analyzed, and the compressive strength of masonry is obtained, and by regression analysis of test data, combined with the code, the formula of the suggested calculation of compressive strength of sintered shale brick masonry with rectangular hole is put forward. By fitting the stress-strain data of the target masonry, the rising section expression of the constitutive curve of the target masonry is obtained, and through the processing of the experimental data, the calculation expression of the elastic modulus of the target masonry and the recommended Poisson's ratio are presented. The variation trend of elastic modulus and Poisson ratio with load is analyzed. Based on the experimental study of shear resistance of masonry joint, the shear failure characteristics of masonry are analyzed, and the shear strength is obtained, and the formula for calculating shear strength of sintered shale brick masonry with rectangular hole is put forward. On the basis of experiments, the basic mechanical properties of sintered shale brick masonry with rectangular holes are discussed. It provides a theoretical basis for "Building Technical Specification for Sintered Shale porous Brick" and "Building Technical Specification for Sintered Shale porous Brick" in order to guide its application and popularization in practical engineering.
【学位授予单位】：广西科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU522

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