再生混凝土砌块墙体在地震荷载作用下的有限元分析

发布时间：2018-08-25 17:06

【摘要】：目前国内外对于再生混凝土砌块的材料性能及基本力学性能已有一定研究,但对于再生混凝土砌块墙体的抗震性能研究较少,而其他材料砌体墙的相关研究却比较充分,可以作为本文研究的参照。本文结合相关墙体拟静力试验结果及ABAQUS有限元分析软件,对再生混凝土砌块墙体抗震性能进行深入分析,主要包括以下两方面内容:(1)非线性有限元分析。对比有限元模型的计算结果与相应试验同尺试件的试验结果,验证有限元建模方法的可靠性。在上述基础上,运用该建模方法综合分析竖向压应力、高宽比、构造柱设置、构造柱材料、洞口尺寸、洞口数量、洞口位置及洞口加固措施等因素对该类再生混凝土砌块墙体抗震性能的影响。分析结果表明:提升竖向压应力对墙体承载力有利,但不利于其变形能力;提升高宽比的效果与竖向压应力相反;构造柱对墙体承载力及变形性能均有明显改善,且普通混凝土构造柱的效果要强于再生混凝土构造柱;增大洞口水平或竖向尺寸将不利于墙体承载力及变形能力发挥,但其效果有所不同;洞口数量增多后,墙体变形能力将变差,但洞口排布方向的不同将引起墙体承载力差异;洞口偏离中心位置后,墙体变形能力均会上升,而洞口偏移方向的不同会导致墙体承载力区别;洞口加固后,墙体承载力及变性能力均有所提升,且芯柱善于提升墙体承载力,而水平梁善于提升墙体变形能力。(2)再生混凝土砌块墙体抗剪承载力公式。本文首先介绍了现行国家标准中对砌体墙抗剪承载力计算公式的相关规定,其次列出了现有再生混凝土砌块墙体相关文献中建议的该类墙体抗剪承载力计算公式。在上述基础上,结合本文有限元分析结果,拟合出再生混凝土砌块素墙体及约束墙体的抗剪承载力计算公式。通过计算值与试验及模拟结果的比较,可知该公式有较好适用性。
[Abstract]:At present, the material performance and basic mechanical properties of recycled concrete block have been studied at home and abroad, but there are few researches on seismic performance of recycled concrete block wall, while the related research on other materials masonry wall is relatively sufficient. It can be used as a reference for this paper. In this paper, the seismic behavior of recycled concrete block wall is deeply analyzed by using the pseudo-static test results and ABAQUS finite element analysis software. The main contents are as follows: (1) nonlinear finite element analysis. The reliability of the finite element modeling method is verified by comparing the calculation results of the finite element model with the corresponding test results of the same scale specimen. On the basis of the above, the vertical compressive stress, aspect ratio, structure column setting, material of structure column, hole size, the number of openings are analyzed synthetically by using this modeling method. The influence of the location of the orifice and the reinforcement measures on the seismic behavior of this kind of recycled concrete block wall. The results show that the uplift of vertical compressive stress is beneficial to the bearing capacity of the wall, but is not conducive to its deformation capacity, the effect of lifting the aspect ratio is opposite to the vertical compressive stress, and the bearing capacity and deformation performance of the wall are obviously improved by the structural columns. The effect of ordinary concrete structural columns is better than that of recycled concrete structural columns, and increasing the horizontal or vertical dimensions of the openings will not benefit the bearing capacity and deformation ability of the wall, but the effect is different. The deformation capacity of the wall will become worse, but the different orifice arrangement direction will cause the difference of the wall bearing capacity, the wall deformation capacity will increase after the hole deviates from the center position, and the different deviation direction of the hole will lead to the difference of the wall bearing capacity. After reinforcement, the bearing capacity and denaturation capacity of the wall are improved, and the core column is good at enhancing the wall bearing capacity, while the horizontal beam is good at enhancing the deformation capacity of the wall. (2) the formula of shear bearing capacity of recycled concrete block wall. This paper first introduces the relevant provisions of the current national standard on the calculation formula of shear bearing capacity of masonry walls, and then lists the formulas for calculating the shear capacity of this kind of walls, which are suggested in the relevant literature of existing recycled concrete block walls. On the basis of the above, combined with the results of finite element analysis in this paper, the formulas of shear bearing capacity of recycled concrete block wall and confined wall are fitted out. By comparing the calculated values with the experimental and simulation results, we can see that the formula has good applicability.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU311.3;TU364

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