新型燒結(jié)頁巖自保溫砌塊砌體的基本力學(xué)性能研究
[Abstract]:Our country is a big energy consuming country, building energy consumption accounts for about 1/3 of the total energy consumption of the whole society. Therefore, it is of great significance to develop building energy saving and study green environmental protection building materials. Sintered shale porous wall materials are green and environmentally friendly building materials with the advantages of energy saving, land saving and material saving, but the sintered wall materials studied at present are vertical pore wall materials. When the traditional vertical hole hollow wall material is built, it is easy to appear the situation of mortar falling holes, which will affect the energy saving effect, waste the mortar, and the strength can not be fully utilized, and so on. Therefore, a new type of 9 row sintered shale self-insulating porous block with horizontal hole (referred to as new type sintered shale self-insulating block) is proposed to solve the problem of vertical pore block. The new type of sintered shale self-insulating block is very different from the traditional vertical hole block in structure. The calculation theory and design method in the current masonry code can not be directly applied to the new type of sintered shale self-insulating block wall. In this paper, the basic mechanical properties of the block masonry and the thermal properties of the masonry wall are studied experimentally and theoretically. The deformation characteristics and failure mechanism of a new type of sintered shale self-insulating block masonry under compression are grasped. According to the test results, the suggested formula for calculating the average compressive strength of this kind of block is proposed, and according to the stress-strain relation diagram in the test data, The stress-strain calculation expression of logarithmic type of sintered shale self-insulating block masonry is presented and the formula of elastic modulus of the masonry is presented. In this paper, ANSYS finite element simulation software is used to simulate and analyze the mechanical behavior of the new type of sintered shale self-insulating block masonry under axial pressure. The finite element analysis model with sufficient size is established, and the parameters of the material in the finite element analysis are determined. The stress distribution, deformation and compressive strength of masonry are calculated and analyzed by proper assumptions, and the results are compared with the experimental results. It is shown that the compression of new type sintered shale self-insulating block masonry can be well simulated by using ANSYS finite element analysis software. Further analysis shows that the masonry strength increases with the increase of the width of the transverse rib of the block and decreases with the increase of the number of holes in the block. In this paper, the failure characteristics and failure mechanism of a new type of sintered shale self-insulating block masonry under shear are analyzed through the experimental study of two groups (18 groups) of shear specimens. The experimental results show that the average shear strength of the new sintered shale self-insulating block masonry is 1.6 times that of the average shear strength of sintered porous brick masonry calculated according to the specifications. The new type of sintered shale self-insulating block mortar at the top and bottom of two grooves has a complete shear failure on the failure surface. It is found by calculation that the shear resistance of the mortar at the groove can not be ignored. This paper presents an expression for the average shear strength of a new type of sintered shale self-insulating block masonry. In this paper, a new type of thermal calculation model of sintered shale self-insulating block wall is established, and the heat transfer coefficient and thermal inertia index of the wall are calculated theoretically, and the heat transfer coefficient of the wall is measured experimentally. The results show that compared with the current building energy saving standard of Hunan province, the wall can achieve the requirement of 50% energy saving, and it is not necessary to do the heat preservation treatment inside and outside the wall. Through the research in this paper, the basic mechanical properties of the new type sintered shale self-insulating block masonry and the thermal properties of the wall are mastered, which provides a theoretical basis for its subsequent research and the formulation of relevant specifications.
【學(xué)位授予單位】:湖南大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:TU522.3
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