新型混凝土橫孔空心砌塊及砌體抗壓性能研究
發(fā)布時間：2019-04-02 18:50
【摘要】：當前,我國混凝土砌塊建筑發(fā)展迅速,混凝土豎孔砌塊的應用較為普遍。但豎孔砌塊在使用中保溫隔熱性能差、防滲性能差、不方便布置管道,這些不利因素導致混凝土砌塊建筑的功能受損,并給人們的心理和感官帶來了使用障礙。針對豎孔砌塊存在的一系列缺點,本文提出了一種新型混凝土橫孔空心砌塊,砌塊通過獨特的結構設計具有防滲、抗裂、方便布置管道等眾多優(yōu)點。本文對砌塊名義混凝土抗壓強度與砌塊抗壓強度和砌塊抗壓強度與砌體抗壓強度間的關系進行了初步探索,并對不同找平方式的砌塊進行了抗壓強度研究,主要研究內(nèi)容如下:首先,通過不同名義混凝土抗壓強度的砌塊受壓試驗,研究得到了砌塊抗壓強度平均值隨砌塊名義混凝土抗壓強度變化的關系式。并對前期生產(chǎn)的橫孔空心砌塊的抗壓強度與本次試驗所用砌塊的抗壓強度進行了對比,試驗結果表明通過改善砌塊混凝土材料砌塊抗壓強度得到了提高。其次,對由不同抗壓強度的砌塊砌筑而成的砌體進行受壓試驗,研究砌體抗壓強度與砌塊抗壓強度間的關系。研究表明,規(guī)范公式并不適用于橫孔空心砌塊砌體抗壓強度的計算,進而通過對砌體抗壓強度數(shù)據(jù)進行統(tǒng)計分析,得到了砌體抗壓強度平均值的合理計算公式。再者,通過不同找平方式的橫孔砌塊受壓試驗,研究找平方式的不同對砌塊抗壓強度的影響。試驗結果表明,砌塊采用不同的找平方式所得的砌塊抗壓強度差別較大。最后,運用ABAQUS軟件對不同找平方式的砌塊進行有限元模擬分析,得到了砌塊承載力值及應力分布圖。分析結果表明,有限元模擬結果所得砌塊承載力與試驗所得砌塊承載力較為接近,驗證了數(shù)值模型的準確性,為橫孔空心砌塊及砌體抗壓強度的進一步研究提供了理論依據(jù)。
[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.
【學位授予單位】：湖南大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU522.3
本文編號：2452822
[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.
【學位授予單位】：湖南大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU522.3
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，本文編號：2452822
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