蒸压粉煤灰加气混凝土复合砌块基本力学性能及其填充墙框架结构抗震性能研究

发布时间：2018-06-14 22:16

本文选题：蒸压粉煤灰加气混凝土复合砌块 + 抗压强度　；参考：《太原理工大学》2014年硕士论文

【摘要】：目前,全球能源问题日益严峻,建筑能耗在全球能源消耗的比例不断攀升,如何更好地降低建筑能耗成了专家与学者所关注的问题。随着各发达国家有机建筑,可持续建筑,零能耗建筑不断涌现,我国也实施了建筑节能65%的目标。随着65%建筑节能目标的实施,单一材料的砌块形式很难满足填充墙结构建筑保温节能目标的要求,新型保温砌块的研发与应用迫在眉睫。通过采用不同材料复合,充分利用不同材料的优点,成为了新型墙体保温砌块研发的新思路。山西是煤炭生产与消耗大省,火力发电产生了大量的粉煤灰,这些粉煤灰囤积量很大；目前,只有少量被利用。本课题对蒸压粉煤灰加气混凝土复合砌块基本力学性能及其填充墙框架结构抗震性能进行研究,为蒸压粉煤灰加气混凝土复合砌块填充墙框架结构的推广使用提供理论依据；为编制山西省工程建设地方标准《蒸压粉煤灰加气混凝土砌块墙体自保温技术规程》解决关键技术问题。同时,可以有效解决粉煤灰综合利用和由于粉煤灰囤积造成的环境污染这两方面的问题。本课题研究的蒸压粉煤灰加气混凝土复合砌块是由蒸压粉煤灰加气混凝土砌块和聚苯板通过聚合物粘结砂浆复合成的一种新型的夹芯复合保温砌块。其中,外叶块为B07级的蒸压粉煤灰加气混凝土砌块,内叶块为B06级的蒸压粉煤灰加气混凝土砌块。经理论分析与优化选择,该复合砌块沿墙厚方向250mmm(外叶块50mmm,聚苯板50mmm,内叶块150mmm)就可以满足寒冷地区65%的节能标准。本课题以250mmm厚的蒸压粉煤灰加气混凝土复合砌块为研究对象,进行了如下工作： (1)针对本课题研究的蒸压粉煤灰加气混凝土复合砌块进行了内叶块抗压强度试验、聚苯板压缩性试验、沿复合砌块厚度方向的连接强度试验和复合砌块的抗压强度试验。试验表明：蒸压粉煤灰加气混凝土复合砌块的内叶块抗压强度,聚苯板的压缩强度,沿复合砌块厚度方向的连接强度和复合砌块的抗压强度值,均符合《复合保温砖和复合保温砌块》(GB/T29060-2012)的规定,同时测得聚苯板的压缩强度值,符合《绝热模塑聚苯乙烯泡沫塑料》(GB/T10801.2-2002)的规定。 (2)借用大型通用有限元分析ANSYS软件,对采取不同构造措施(设置构造柱、水平系梁、构造柱和水平系梁)的蒸压粉煤灰加气混凝土复合砌块填充墙的单层单跨框架结构和空框架进行了水平荷载下的非线性分析,通过荷载--位移曲线、应力云图对比发现,采取构造措施的蒸压粉煤灰加气混凝土复合砌块填充墙的框架结构抗侧移刚度和水平承载力较空框架都有不同程度的提高,设置构造措施的该复合砌块填充墙在应力分布规律上趋于一致,沿墙体对角线和墙柱连接处的应力较大,因此本课题建议墙柱之间采用脱开的连接方式,同时在墙柱界面处,双面沿缝两侧各通长设置与墙宽一致的钢丝网可防止复合砌块填充墙沿对角线和墙柱方向的开裂。 (3)以研究多遇地震下蒸压粉煤灰加气混凝土复合砌块填充墙的侧向刚度对钢筋混凝土框架结构抗震性能的影响为目的,同时考虑到保温节能效果的最优化,将蒸压粉煤灰加气混凝土复合砌块作为玻化微珠保温承重混凝土框架结构填充墙,对一栋六层C35级的玻化微珠保温承重混凝土框架结构建筑,分别建立了三个模型：纯框架结构、满布填充墙的框架结构、填充墙竖向不均匀布置的框架结构,运用SAP2000软件,对这三个模型进行了模态分析,反应谱分析以及多遇地震下的线性动力时程分析。分析表明：满布填充墙的C35级玻化微珠保温承重混凝土框架结构周期折减系数为0.71,而底层不布置填充墙的C35级玻化微珠保温承重混凝土框架结构周期折减系数为0.75,比规范建议的框架结构的周期折减系数0.6～0.7偏大,从而建议基于蒸压粉煤灰加气混凝土复合砌块填充墙的玻化微珠保温承重混凝土框架结构的周期折减系数取为0.7～0.8；底层不设置填充墙,易使结构竖向刚度不均匀,从而在底层形成薄弱层,使底层的最大位移、最大层间位移、层间位移角、层剪力都形成突变,建议在布置蒸压粉煤灰加气混凝土复合砌块填充墙时,应该遵循规范的构造要求,尽量使填充墙布置均匀,若无法避免,应该采取增大底层的梁柱配筋等加固措施；同时建议进一步完善规范,考虑填充墙对结构前期刚度的贡献。
[Abstract]:At present , the global energy problem is increasingly serious , the proportion of building energy consumption in global energy consumption is rising , how to better reduce the energy consumption of building becomes the problem that experts and scholars pay attention . With the implementation of 65 % building energy - saving target , it is difficult to meet the requirement of building heat - insulation and energy - saving target of filling wall structure .

Shanxi is coal production and consumption big province , thermal power generation produces a lot of fly ash , these fly ash accumulation amount is large ;
At present , only a small amount is used . The research on the basic mechanical properties of autoclaved fly ash aerated concrete composite block and the seismic behavior of the filled wall frame structure provide theoretical basis for the popularization and use of autoclaved fly ash aerated concrete composite block filled wall frame structure ;
in ord to solve that key technical problem , the problem of the comprehensive utilization of fly ash and the environment pollution due to the accumulation of fly ash can be effectively solved .

The autoclaved fly ash aerated concrete composite building block is composed of autoclaved fly ash aerated concrete block and polyphenyl plate through polymer bonding mortar .

( 1 ) The compressive strength of the inner blade , the compressive strength of the polyphenyl plate , the strength of the connection strength in the thickness direction of the composite block and the compressive strength of the composite block are tested according to the compressive strength of the inner blade , the compressive strength of the polyphenyl plate , the connection strength along the thickness direction of the composite block and the compressive strength of the composite block .

( 2 ) The nonlinear analysis of the single - layer single - span frame structure and the empty frame of autoclaved fly ash aerated concrete composite block filled wall with different structural measures ( including structural columns , horizontal beams , structural columns and horizontal beams ) is carried out on the basis of the large - scale general finite element analysis ANSYS software .

( 3 ) In order to study the influence of the lateral stiffness of autoclaved fly ash aerated concrete composite building block filled with aerated concrete composite block on seismic performance of reinforced concrete frame structure , three models are established : pure frame structure , frame structure filled with filled wall , and linear dynamic time history analysis under multi - event earthquake .
The bottom layer is not provided with a filling wall , so that the vertical rigidity of the structure is not uniform , so that a weak layer is formed on the bottom layer , so that the maximum displacement , the maximum interlayer displacement , the interlayer displacement angle and the layer shearing force of the bottom layer are mutated .
At the same time , it is suggested to further improve the norm and consider the contribution of the filling wall to the pre - structural rigidity of the structure .
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU522.3;TU352.11

【参考文献】