發(fā)布時(shí)間：2019-04-02 18:50

【摘要】：當(dāng)前,我國(guó)混凝土砌塊建筑發(fā)展迅速,混凝土豎孔砌塊的應(yīng)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(dǎo)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(duì)豎孔砌塊存在的一系列缺點(diǎn),本文提出了一種新型混凝土橫孔空心砌塊,砌塊通過獨(dú)特的結(jié)構(gòu)設(shè)計(jì)具有防滲、抗裂、方便布置管道等眾多優(yōu)點(diǎn)。本文對(duì)砌塊名義混凝土抗壓強(qiáng)度與砌塊抗壓強(qiáng)度和砌塊抗壓強(qiáng)度與砌體抗壓強(qiáng)度間的關(guān)系進(jìn)行了初步探索,并對(duì)不同找平方式的砌塊進(jìn)行了抗壓強(qiáng)度研究,主要研究?jī)?nèi)容如下:首先,通過不同名義混凝土抗壓強(qiáng)度的砌塊受壓試驗(yàn),研究得到了砌塊抗壓強(qiáng)度平均值隨砌塊名義混凝土抗壓強(qiáng)度變化的關(guān)系式。并對(duì)前期生產(chǎn)的橫孔空心砌塊的抗壓強(qiáng)度與本次試驗(yàn)所用砌塊的抗壓強(qiáng)度進(jìn)行了對(duì)比,試驗(yàn)結(jié)果表明通過改善砌塊混凝土材料砌塊抗壓強(qiáng)度得到了提高。其次,對(duì)由不同抗壓強(qiáng)度的砌塊砌筑而成的砌體進(jìn)行受壓試驗(yàn),研究砌體抗壓強(qiáng)度與砌塊抗壓強(qiáng)度間的關(guān)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(qiáng)度的計(jì)算,進(jìn)而通過對(duì)砌體抗壓強(qiáng)度數(shù)據(jù)進(jìn)行統(tǒng)計(jì)分析,得到了砌體抗壓強(qiáng)度平均值的合理計(jì)算公式。再者,通過不同找平方式的橫孔砌塊受壓試驗(yàn),研究找平方式的不同對(duì)砌塊抗壓強(qiáng)度的影響。試驗(yàn)結(jié)果表明,砌塊采用不同的找平方式所得的砌塊抗壓強(qiáng)度差別較大。最后,運(yùn)用ABAQUS軟件對(duì)不同找平方式的砌塊進(jìn)行有限元模擬分析,得到了砌塊承載力值及應(yīng)力分布圖。分析結(jié)果表明,有限元模擬結(jié)果所得砌塊承載力與試驗(yàn)所得砌塊承載力較為接近,驗(yàn)證了數(shù)值模型的準(zhǔn)確性,為橫孔空心砌塊及砌體抗壓強(qiáng)度的進(jìn)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(xué)位授予單位】：湖南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU522.3

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本文編號(hào)：2452822