新型混凝土横孔空心砌块及砌体抗压性能研究

发布时间：2019-04-02 18:50

【摘要】：当前,我国混凝土砌块建筑发展迅速,混凝土竖孔砌块的应用较为普遍。但竖孔砌块在使用中保温隔热性能差、防渗性能差、不方便布置管道,这些不利因素导致混凝土砌块建筑的功能受损,并给人们的心理和感官带来了使用障碍。针对竖孔砌块存在的一系列缺点,本文提出了一种新型混凝土横孔空心砌块,砌块通过独特的结构设计具有防渗、抗裂、方便布置管道等众多优点。本文对砌块名义混凝土抗压强度与砌块抗压强度和砌块抗压强度与砌体抗压强度间的关系进行了初步探索,并对不同找平方式的砌块进行了抗压强度研究,主要研究内容如下:首先,通过不同名义混凝土抗压强度的砌块受压试验,研究得到了砌块抗压强度平均值随砌块名义混凝土抗压强度变化的关系式。并对前期生产的横孔空心砌块的抗压强度与本次试验所用砌块的抗压强度进行了对比,试验结果表明通过改善砌块混凝土材料砌块抗压强度得到了提高。其次,对由不同抗压强度的砌块砌筑而成的砌体进行受压试验,研究砌体抗压强度与砌块抗压强度间的关系。研究表明,规范公式并不适用于横孔空心砌块砌体抗压强度的计算,进而通过对砌体抗压强度数据进行统计分析,得到了砌体抗压强度平均值的合理计算公式。再者,通过不同找平方式的横孔砌块受压试验,研究找平方式的不同对砌块抗压强度的影响。试验结果表明,砌块采用不同的找平方式所得的砌块抗压强度差别较大。最后,运用ABAQUS软件对不同找平方式的砌块进行有限元模拟分析,得到了砌块承载力值及应力分布图。分析结果表明,有限元模拟结果所得砌块承载力与试验所得砌块承载力较为接近,验证了数值模型的准确性,为横孔空心砌块及砌体抗压强度的进一步研究提供了理论依据。
[Abstract]:At present, the concrete block building develops rapidly in our country, and the application of concrete vertical hole block is more common. However, the performance of vertical hole block is poor in heat preservation and insulation, anti-seepage performance, and it is not convenient to arrange pipes. These unfavorable factors cause the function of concrete block building to be damaged, and bring obstacle to people's psychology and sense. Aiming at a series of shortcomings of vertical-hole block, a new type of concrete cross-hole hollow block is proposed in this paper. The block has many advantages, such as anti-seepage, anti-crack, convenient arrangement of pipeline and so on through unique structural design. In this paper, the relationship between nominal concrete compressive strength and block compressive strength, and between block compressive strength and masonry compressive strength is preliminarily explored, and the compressive strength of masonry blocks with different levelling methods is studied. The main research contents are as follows: firstly, the relationship between the average compressive strength of masonry block and the nominal concrete compressive strength of block is obtained through the compressive tests of masonry blocks with different nominal compressive strength. The compressive strength of the cross-hole hollow block produced in the previous period is compared with that of the block used in this test. The test results show that the compressive strength of the concrete block has been improved by improving the compressive strength of the block. Secondly, the relationship between the compressive strength of masonry and the compressive strength of block is studied by the compression test of block masonry with different compressive strength. The research shows that the code formula is not suitable for the calculation of compressive strength of cross-hole hollow block masonry, and through statistical analysis of compressive strength data of masonry, a reasonable formula for calculating the average value of compressive strength of masonry is obtained. Furthermore, the influence of different levelling methods on the compressive strength of block is studied through the compression test of cross-hole block with different levelling methods. The test results show that the compressive strength of block with different leveling methods is different. Finally, the finite element simulation analysis of block with different levelling methods is carried out by using ABAQUS software, and the bearing force value and stress distribution diagram of the block are obtained. The analysis results show that the bearing capacity of the block obtained by the finite element simulation is close to that of the test block, which verifies the accuracy of the numerical model and provides a theoretical basis for the further study of the compressive strength of the cross-hole hollow block and masonry.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU522.3

【参考文献】