基于ABAQUS整体式模型下砌体结构抗震性能影响因素研究

发布时间：2018-01-15 10:29

本文关键词：基于ABAQUS整体式模型下砌体结构抗震性能影响因素研究　出处：《湖南大学》2014年硕士论文　论文类型：学位论文

【摘要】：在今后相当长的一段时间内，砌体结构仍将作为我国广大地区的一种重要结构体系。砌体结构的材料性质和砌筑方式，决定了它在抵御水平地震作用时的脆弱和缺乏延性。因此，研究砌体结构抗震性能的影响因素并有效地提高砌体结构抵御地震灾害的能力，具有重要意义。研究表明，大型通用有限元软件ABAQUS在钢筋混凝土分析方面具有很强的能力。尤其是它所独有的混凝土损伤塑性模型，能够较好的模拟混凝土材料的非线性性能。所以，本文选择有限元软件ABAQUS，建立18片砖砌墙体并利用混凝土损伤塑性模型进行有限元模拟分析，得到砌体墙片的荷载—位移曲线和刚度退化曲线。然后，分别探讨了构造措施、开洞情况、砂浆强度和竖向压应力等因素对墙体开裂荷载、极限荷载以及位移延性的影响。本文在第四章以已有的振动台试验为基础，利用ABAQUS对其原型结构进行了抗震验算，并得到了其在地震作用下的动力响应。根据砌体模型损伤云图及其受拉损伤参数（DAMAGET）值的大小，判断砌体结构的开裂位置与破坏程度，研究砌体结构地震作用下的抗震性能。通过时程分析数据与试验模型结果的对比分析，验证了本文ABAQUS有限元模型各项参数设置的合理性。最后，在对试验模型的模拟基础上，建立四个有限元模型，研究各因素对砌体结构抗震性能的影响。选择有限元模型中受拉损伤最严重的两片墙体为分析对象，考虑在不同罕遇地震烈度下，各模型的平均受拉损伤参数值及层间位移角，，得到它们的受拉损伤参数曲线；并将提取的层间位移角与各性能水准线比较，判断结构的破坏程度，给出相应的建议。
[Abstract]:For a long time in the future, masonry structure will still be an important structural system in the vast area of our country, the material property and masonry way of masonry structure. Therefore, it is of great significance to study the influencing factors of the seismic behavior of masonry structure and to effectively improve the ability of masonry structure to resist earthquake disaster. The research shows that the large and universal finite element software ABAQUS has a strong ability in the analysis of reinforced concrete, especially its unique damage plastic model of concrete. Therefore, the finite element software Abaqus is chosen to establish 18 pieces of brick wall and use concrete damage plastic model to simulate the nonlinear behavior of concrete. The load-displacement curves and stiffness degradation curves of masonry walls are obtained. Then, the cracking loads of masonry walls are discussed, such as construction measures, opening conditions, mortar strength and vertical compressive stress. The influence of ultimate load and displacement ductility. In chapter 4th, based on the existing shaking table test, the earthquake resistance of the prototype structure is calculated by using ABAQUS. According to the damage cloud diagram of masonry model and the value of tensile damage parameter (DAMAGETT), the cracking position and failure degree of masonry structure are judged. The seismic behavior of masonry structure under earthquake is studied. The rationality of the parameter setting of the ABAQUS finite element model is verified by comparing the time-history analysis data with the experimental model results. Finally, four finite element models are established on the basis of the simulation of the experimental model. The influence of various factors on the seismic performance of masonry structure is studied. Two walls with the most serious tensile damage in the finite element model are selected as the analysis object, and the seismic intensity is considered under different rare earthquake intensity. The average tensile damage parameters and the interlayer displacement angle of each model are obtained, and their curves of tensile damage parameters are obtained. The extracted interlayer displacement angle is compared with each performance leveling line, the damage degree of the structure is judged, and the corresponding suggestions are given.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU364;TU352.11

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