基于ABAQUS的配筋构造柱式砌体墙的有限元分析

发布时间：2018-01-05 12:20

本文关键词：基于ABAQUS的配筋构造柱式砌体墙的有限元分析　出处：《郑州大学》2014年硕士论文　论文类型：学位论文

【摘要】：我国是全世界地震活动最频繁的国家之一,历次大地震都造成了严重的人员财产损失。砌体建筑由于其造价便宜,施工方便等优点,在我国今后一个时期内仍然会大量的存在。砌体结构在地震中的破坏尤为严重,因此研究砌体结构的破坏机理,提高砌体的抗震性能及延性,为人们在地震中逃生争取更加宝贵的时间。本文首先介绍了砌体建筑地震中的受力状况以剪切为主,但也存在相当部分弯曲破坏的房屋。对近些年来国内外专家对砌体结构进行试验和分析的状况进行了综述,对比弯曲破坏的优势和剪切破坏的缺点,指出发生弯曲破坏是提高砌体墙抗震能力的有效途径。依据研究目的对砌体模型加以设计。分析对承载力产生影响的因素,在有关理论的基础上,对模型墙体进行理论上的斜截面抗剪承载力和正截面抗弯承载力进行计算。根据剪跨比计算的结果,对模型的加载高度进行取值。采用有限元软件ABAQUS按照模型尺寸来建立窗间墙和一字墙有限元模型,通过应力云图分析模型的破坏过程,对比分析模拟得到的加载曲线和骨架曲线,得到如下结论：1.随着加载高度的提高,两模型极限水平承载力慢慢减小,但是后期的延性和耗能能力有所提升。增大竖向压力可提高承载力,若是压力过大会发生脆性的斜压破坏。2.设置构造柱和配筋的窗间墙模型在竖向压力和水平荷载共同作用下易发生剪切破坏,一字墙较容易发生弯曲或弯剪破坏。素墙会发生脆性的剪切破坏,其极限承载力低于同等条件下的配筋砌体。配筋砌体破坏后由于构造柱及钢筋的设置,大大延缓了破坏的进程。3.对比分析循环往复加载得到相应的滞回曲线和骨架曲线,窗间墙模型W-1的极限承载能力比一字墙模型Q-1的大,Q-1的延性性能优于W-1,说明后期的塑性变形计耗能能力好。综上说明本文的模拟结果具有一定的参考价值。
[Abstract]:China is one of the world's most frequent seismic activity, the previous earthquake caused serious loss of property. The masonry building because of its low cost, the advantages of convenience, in China for a period of time will still exist. A large number of masonry structure damage in the earthquake is particularly serious, so the failure mechanism Research on masonry structure, improve the seismic performance and ductility of masonry, strive for more precious time for people to escape in the earthquake. This paper first introduces the masonry buildings in seismic stress condition by shearing, but there are also a considerable part of bending failure housing. In recent years the domestic and foreign experts to test and masonry structure analysis of the situation were summarized, comparison of bending failure and shear failure of the advantages disadvantages, pointed out that the occurrence of bending failure is an effective way to improve the seismic capacity of the masonry wall. According to the study purpose The design of masonry model. Analysis of the impact factors on the bearing capacity, based on the related theory, the model of theory on the wall of oblique section shear capacity and flexural capacity are calculated. According to the section of the shear span ratio calculation, the value model of the load height. According to the model size to build a wall between windows and a wall finite element model by the finite element software ABAQUS, the stress nephogram analysis of failure process model, comparative analysis of the simulated load curve and skeleton curve, the conclusions are as follows: 1. with the loading height increased, gradually reduce the bearing capacity of two level model, but the ductility and energy dissipation capacity of the late the increase of vertical pressure can be improved. To improve the bearing capacity, if the baroclinic pressure will occur brittle failure.2. constructional column and the reinforcement of the window wall model in the vertical pressure and water The interaction of horizontal load under shear failure easily occurs, the word wall more prone to bending or shear bending shear wall will occur. In brittle failure, lower reinforcement of masonry under the same conditions. The ultimate bearing capacity of reinforced masonry column and reinforced after the destruction of the tectonic setting, greatly extended contrast.3. corrosion damage process the analysis of the corresponding cyclic loading hysteretic curves and skeleton curves, load bearing capacity than the word wall model Q-1 large W-1 limit wall model window, ductility performance of Q-1 is better than W-1, shows that the plastic deformation energy dissipation capacity meter of late Ming said. To sum up simulation results in this paper have a certain reference value.

【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU364

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