基于ABAQUS的损伤钢筋混凝土框架结构静力弹塑性分析

发布时间：2018-03-17 06:11

本文选题：钢筋混凝土框架　切入点：静力弹塑性分析　出处：《中南大学》2014年硕士论文　论文类型：学位论文

【摘要】：钢筋锈蚀和混凝土碳化等耐久性损伤会导致混凝土结构抗震性能显著下降,但目前的主要研究都集中在损伤对单个构件抗震性能的影响上,而对整个结构的研究比较少。本文结合国家自然科学基金项目“钢筋混凝土结构抗震耐久性研究(51178470)”,通过有限元软件ABAQUS分析研究耐久性损伤对钢筋混凝土框架结构抗震性能的影响。论文主要工作如下： (1)对选取的试验框架建立有限元分析模型,对其进行静力弹塑性分析,并与试验结果进行对比,验证ABAQUS分析模型及模拟方法的可靠性与准确性 (2)对不同钢筋锈蚀率的框架结构进行静力弹塑性分析,分别得到了结构的荷载-位移曲线、层间位移角曲线,分析不同锈蚀率结构在小、中、大震下的抗震性能及其规律,并在此基础上拟合了考虑锈蚀率影响的框架抗震承载力及层间位移角的折减公式。 (3)对不同碳化深度的框架结构进行静力弹塑性分析,分别得到了结构的荷载-位移曲线、层间位移角曲线,分析不同碳化深度结构在小、中、大震下的抗震性能。 (4)对不同使用时间的框架结构进行静力弹塑性分析,分别得到了结构的荷载-位移曲线、层间位移角曲线,分析不同使用时间下结构在小、中、大震下的抗震性能及其规律,并在此基础上拟合了考虑随时间变化的框架抗震承载力及层间位移角的折减公式。
[Abstract]:Durability damage such as corrosion of steel bar and carbonization of concrete will cause the seismic performance of concrete structure to decline significantly, but the main research at present is focused on the effect of damage on the seismic behavior of single member. However, the research on the whole structure is less. In this paper, combined with the project of National Natural Science Foundation "Research on Seismic durability of reinforced concrete structure (51178470)", the durability damage to reinforced concrete frame structure is studied by finite element software ABAQUS. The main work of this paper is as follows:. 1) the finite element analysis model of the selected test frame is established, and the static elastic-plastic analysis is carried out. The reliability and accuracy of the ABAQUS analysis model and the simulation method are verified by comparing with the test results. (2) the static elastic-plastic analysis of frame structures with different corrosion rates of steel bars is carried out, and the load-displacement curves and interstory displacement angle curves are obtained, respectively. The seismic behavior and regularity of structures with different corrosion rates under small, moderate and large earthquakes are analyzed. On this basis, the formula of seismic bearing capacity and interstory displacement angle of frame considering the effect of corrosion rate is fitted. 3) the static elastic-plastic analysis of frame structures with different carbonation depths is carried out, and the load-displacement curves and interstory displacement angle curves are obtained, respectively, and the seismic behavior of structures with different carbonation depths under small, moderate and large earthquakes is analyzed. 4) the static elastic-plastic analysis of frame structures with different service time is carried out, and the load-displacement curves and interstory displacement angle curves are obtained, respectively. The seismic behavior and regularity of the structures under small, moderate and large earthquakes are analyzed under different service times. On this basis, the formula of seismic bearing capacity and interstory displacement angle of frame considering time variation is fitted.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU375.4

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