带砼构件加气混凝土砌块墙体力学及热工性能分析

发布时间：2018-04-23 13:32

本文选题：加气混凝土 + 混凝土构件　；参考：《长沙理工大学》2013年硕士论文

【摘要】：随着新型建筑材料行业的发展以及我国建筑节能政策进一步推广，对墙体保温隔热的性能要求不断提高。加气混凝土是目前我国外墙材料中唯一一种能够满足建筑节能65%设计要求的单一墙体材料。加气混凝土由于其优越的保温隔热性能被广泛地应用与外层墙体、屋面和楼层保温材料，同时加气混凝土材料也可以应用于低层结构建筑的承重墙体，但是在提高加气混凝土砌块墙体承载力方面的研究还不多，将加气混凝土材料应用于承重墙体受到了限制。本文在已有强度加气混凝土砌块的基础上结合有限元软件主要针对加气混凝土砌块墙体的受压承载力、局部受压承载力以及加气混凝土砌块组合墙体热桥处理方面做了以下研究：（1）通过合理的考虑砂浆以及灰缝厚度进行加气混凝砌块墙体受压承载力模拟试验研究得出了专用砂浆、灰缝厚度、构造柱间距对加气混凝土砌块墙体受压承载力的影响，，薄灰缝专用砂浆对提高加气混凝凝土砌块墙体的轴心受压承载力有一定影响，对其偏心受压承载力提高更为明显，考虑施工方便与经济性构造柱宜每隔1.2-1.8米设置。（2）通过对加气混凝土砌块墙体进行中部和端部的局部受压承载力模拟试验得出了该种墙体局部受压的破坏形态与局部受压面积相关，然后分别回归了中心局部受压和端部局压的墙体局部受压提高系数，并提出相关提高加气混凝土砌块墙体局部受压能力的措施。（3）通过对加气混凝土砌块组合墙体热桥部位进行热学和力学分析，提出了有效降低圈梁、过梁、构造柱等部位热桥效应的措施，并推导了采用保温砌块外包方式保温砌块与钢筋混凝土的厚度关系，利用有限元软件模拟了复合过梁、复合构造柱对下部加气混凝土砌块承载力的影响。
[Abstract]:With the development of new building materials industry and the further promotion of building energy conservation policy in China, the performance requirements of wall insulation and heat insulation have been improved. Aerated concrete is the only single wall material which can meet the requirement of building energy saving 65% in our country at present. Aerated concrete is widely used in outer wall, roof and floor insulation material because of its excellent thermal insulation performance. Meanwhile, aerated concrete material can also be used in load-bearing wall of low-story structure building. However, there is not much research on improving the bearing capacity of aerated concrete block wall, and the application of aerated concrete material to load-bearing wall is limited. Based on the existing strength aerated concrete block, this paper mainly aims at the compressive capacity of the aerated concrete block wall with the finite element software. The local compressive capacity and the heat bridge treatment of aerated concrete block composite wall are studied as follows: 1) the influence of special mortar, thickness of ash joints and spacing of structural columns on the compressive capacity of aerated concrete block wall is obtained through the simulation study on the compressive capacity of aerated concrete block wall with reasonable consideration of mortar and ash joint thickness, and the influence of concrete mortar thickness and structure column spacing on the compressive capacity of aerated concrete block wall is obtained. The special mortar for the thin ash joint has certain influence on the axial compression capacity of the aerated and coagulant soil block wall, especially on the eccentric compressive bearing capacity. The convenient and economical construction columns should be arranged every 1.2-1.8 meters. 2) the local compressive capacity of the aerated concrete block wall is simulated by the local compressive capacity test at the middle and the end of the wall. It is concluded that the local compressive failure pattern of the wall is related to the local compressive area. Then the local compression coefficient of the central and end local compression walls is regressed, and the measures to improve the local compression capacity of the aerated concrete block wall are put forward. Based on the thermal and mechanical analysis of the heat bridge part of aerated concrete block composite wall, the measures to effectively reduce the thermal bridge effect of ring beam, cross beam and structural column are put forward. The relationship between the thickness of reinforced concrete and the thermal insulation block is deduced. The influence of composite beam and composite structural column on the bearing capacity of the lower aerated concrete block is simulated by using finite element software.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU364

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