翼缘设置刚度调节盒的T形梁静力性能试验研究

发布时间：2018-04-22 17:35

本文选题：钢筋混凝土结构 + 刚度调节盒　；参考：《沈阳建筑大学》2014年硕士论文

【摘要】：我国位于世界两大地震带之间,地震发生频繁,而钢筋混凝土结构在我国应用极为广泛,因此在钢筋混凝土结构的抗震性能方面我国有着较高要求。目前在我国高强度钢筋、高强度高性能混凝土等新材料的研究和使用已较为普遍,钢筋混凝土结构在建筑领域的应用范围更已不断扩大,因此研究钢筋混凝土结构的抗震性能具有重大的理论意义和实际意义,通过对混凝土结构抗震性能的研究可以为框架结构的设计提供理论依据,为实际工程应用提供技术指导。本项目以辽宁省营口市经济技术开发区建询施工图审查中心合作项目为背景,对钢筋混凝土框架结构的梁柱节点进行抗震性能有限元分析和加载试验,设计并加工了不同尺寸参数的刚度调节构件以及预埋刚度调节构件的钢筋混凝土楼板试件,对试件进行静力荷载作用下的试验以及有限元分析,研究各项因素对节点抗震性能、延性性能以及刚度和强度退化的影响。本文主要介绍了翼缘削弱型钢筋混凝土梁柱节点抗震性能研究中为削弱T形梁翼缘,降低T形梁刚度而设计的金属构件：刚度调节盒。主要内容为对刚度调节盒试件以及预埋刚度调节盒的钢筋混凝土楼板试件进行有限元分析和静力加载试验,对有限元分析结果以及试验结果数据进行分析与总结,总结其受力及工作、破坏机理,得出计算表达式；有限元分析结果能够与试验结果较好吻合,说明了试验结果较为准确可靠,同时也证明了有限元分析中构件单元选取的正确性。试验结果显示：刚度调节盒能够有效的降低翼缘混凝土刚度并适当降低其强度,能够在外荷载较小时为结构的正常使用功能提供足够的强度与刚度,保证无震和小震作用下能够维持结构的正常的工作状态；当荷载强度临近混凝土极限强度时,即混凝土即将破坏但尚未破坏时,刚度调节盒先于混凝土屈曲破坏,产生塑性屈曲变形,而使节点区T形梁翼缘刚度迅速降低,达到强柱弱梁的目的。
[Abstract]:China is located between the two major seismic zones in the world. Earthquake occurs frequently, but reinforced concrete structures are widely used in our country. Therefore, there are higher requirements for seismic behavior of reinforced concrete structures in China. At present, the research and application of new materials such as high strength steel bar and high strength high performance concrete have been widely used in our country, and the scope of application of reinforced concrete structure in the field of building has been expanded. Therefore, it is of great theoretical and practical significance to study the seismic behavior of reinforced concrete structures. The study of seismic behavior of concrete structures can provide theoretical basis for the design of frame structures and provide technical guidance for practical engineering applications. Based on the cooperation project of Construction drawing examination Center of Yingkou City, Liaoning Province, the seismic behavior of Liang Zhu joint of reinforced concrete frame structure is analyzed by finite element analysis and loading test. The stiffness adjusting members with different size parameters and the reinforced concrete floor specimens with embedded stiffness adjustment members are designed and processed. The static load tests and finite element analysis of the specimens are carried out to study the seismic behavior of joints due to various factors. Ductility and the effects of stiffness and strength degradation. This paper mainly introduces the design of metal member: stiffness adjusting box for weakening flange flange of reinforced concrete Liang Zhu joint in order to weaken flange of T-beam and reduce stiffness of T-beam. The main contents are the finite element analysis and static loading test of the specimens of the stiffness adjusting box and the reinforced concrete floor specimens of the embedded stiffness adjusting box, and the analysis and summary of the results of the finite element analysis and the test results. The results of finite element analysis are in good agreement with the test results, which show that the test results are accurate and reliable. At the same time, the correctness of the element selection in finite element analysis is also proved. The experimental results show that the stiffness adjusting box can effectively reduce the stiffness and strength of the flange concrete, and can provide enough strength and stiffness for the normal function of the structure when the external load is small. When the load strength is close to the ultimate strength of concrete, that is, when the concrete is about to be destroyed but not destroyed, the stiffness adjusting box is prior to the buckling failure of concrete. Due to plastic buckling deformation, the flange stiffness of T-shaped beam in the joint zone is reduced rapidly to achieve the purpose of strong column and weak beam.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU375

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