泡沫混凝土复合板抗震性能的试验研究

发布时间：2018-12-27 19:35

【摘要】：随着我国建筑行业工业化进程的不断加速,以及人们对生活环境质量要求的持续提高,将高新技术应用到传统的建筑行业中,不断探索新型轻质高强、绿色环保、节能保温、抗震性能好的材料,实行住宅产业化,装配式建筑与绿色节能概念进入到建筑结构领域的步伐已势在必行。本文对不同配筋形式的泡沫混凝土复合板进行低周往复加载试验,参照规范设计的2块1/2比例模型的泡沫混凝土复合板,研究标准泡沫混凝土复合板的受力状态和抗震性能以及分析不同配筋形式对其抗震性能的影响。如:开裂荷载、屈服荷载、极限荷载和破坏荷载,墙板的破坏形态、承载能力、变形能力和耗能能力,还对泡沫混凝土复合板的刚度进行分析,即弹性抗侧刚度和刚度的退化分析,总结了刚度在整个加载过程中的变化情况和刚度退化对墙板受力性能的影响,同时还对泡沫混凝土复合板的恢复力模型进行了初步的探讨,归纳和总结了泡沫混凝土复合板恢复力模型的基本特征,对墙板进行了恢复力模型试验拟合,提出了屈服标准滞回环和极限标准滞回环,无量纲骨架曲线等。通过对试验数据处理与分析,得出墙板的滞回曲线、骨架曲线和刚度退化曲线等。试验结果分析表明:与其他填充墙相比,泡沫混凝土复合板是一种轻质高强,绿色环保的节能型墙板。在配筋率、混凝土材料、试件尺寸完全相同的情况下,不同的配筋形式(PMQ-1采用配筋形式为斜向钢筋笼,PMQ-2采用配筋形式为斜向分布钢筋网)对墙板的受力性能和裂缝的开展情况影响较大。泡沫混凝土复合板中边框梁和边框柱内嵌泡沫混凝土板保证其墙板的整体性,再加上斜向钢筋笼与泡沫混凝土形成承受拉压能力较强的斜向小梁,进而使墙板的抗震性能明显增强。分析其滞回曲线,PMQ-1的滞回环面积要比PMQ-2的滞回环面积大得多,说明PMQ-1的延性及耗能能力要比PMQ-2强得多;分析其骨架曲线,PMQ-1的骨架曲线一直都在包络PMQ-2的骨架曲线,说明PMQ-1的承载能力比PMQ-2的好一些。斜向钢筋网配筋方式的泡沫混凝土复合板,由于钢筋是均布在墙板里,使墙板的整体性大大提高,对于裂缝的开展有较强的把控,相比PMQ-1,该墙板裂缝破坏时只是细微裂缝,而且裂缝展开有序,有规律性。
[Abstract]:With the acceleration of the industrialization process of the construction industry in our country, and the continuous improvement of people's requirements for the quality of living environment, the application of high and new technology to the traditional construction industry has been continuously explored, and new types of light and high strength, green environmental protection, energy saving and heat preservation have been continuously explored. It is imperative that materials with good seismic performance, housing industrialization, prefabricated building and green energy saving concept enter the field of building structure. In this paper, the low cycle reciprocating loading test of foam concrete composite slab with different reinforcement forms is carried out, and two 1 / 2 scale model foam concrete composite slabs are designed according to the specifications. The stress state and seismic behavior of standard foamed concrete composite slab are studied and the influence of different reinforcement forms on its seismic performance is analyzed. For example, cracking load, yield load, ultimate load and failure load, failure form, bearing capacity, deformation capacity and energy dissipation capacity of wall slab, and stiffness analysis of foam concrete composite slab, That is, the degradation analysis of elastic lateral stiffness and stiffness, the variation of stiffness in the whole loading process and the influence of stiffness degradation on the mechanical performance of wall slab are summarized. At the same time, the restoring force model of foamed concrete composite slab is also discussed preliminarily. The basic characteristics of the restoring force model of foamed concrete composite slab are summarized and the experimental fitting of the restoring force model is carried out. The yield standard hysteretic loop and limit standard hysteretic loop, dimensionless skeleton curve and so on are proposed. By processing and analyzing the test data, the hysteretic curve, skeleton curve and stiffness degradation curve of the wall panel are obtained. The experimental results show that the foamed concrete composite slab is a kind of energy saving wall board with light weight and high strength and green environment protection compared with other filled walls. When the reinforcement ratio, concrete material and specimen size are exactly the same, different reinforcement forms (PMQ-1 is reinforced in the form of oblique reinforcement cage, The stress behavior and crack development of the wall slab are greatly affected by the reinforced steel mesh in the form of reinforced bars in the form of PMQ-2. In the foam concrete composite slab, the frame beam and the border column embedded in the foam concrete slab ensure the integrity of the wall slab, and the inclined reinforcement cage and the foam concrete form the oblique trabeculae with strong tensile and compression capacity. Furthermore, the seismic performance of the wall panel is obviously enhanced. The hysteresis loop area of PMQ-1 is much larger than that of PMQ-2, which indicates that the ductility and energy dissipation ability of PMQ-1 is much stronger than that of PMQ-2. The skeleton curve of PMQ-1 is always enveloping the skeleton curve of PMQ-2, which shows that the carrying capacity of PMQ-1 is better than that of PMQ-2. The foam concrete composite slab with inclined reinforcement net is distributed evenly in the wall board, which improves the integrity of the wall board greatly, and has stronger control over the crack development, compared with PMQ-1,. The wall board crack damage is only a fine crack, and the crack spread out orderly, regular.
【学位授予单位】：吉林建筑大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.11;TU37

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