屈曲约束支撑装配整体式混凝土框架结构抗震试验与理论分析研究

发布时间：2018-04-28 01:39

本文选题：屈曲约束支撑 + 装配式混凝土框架　；参考：《合肥工业大学》2017年硕士论文

【摘要】：装配式混凝土框架是建筑工业化装配式混凝土结构的主要形式之一,具有施工速度快,现场污染小,劳动力耗费少,绿色环保等优点。但是装配式混凝土框架施工精度要求高,预制梁柱构件采用现场装配,导致其整体受力和抗震性能有待提高,因此目前装配式混凝土框架结构的层数和应用范围受到一定限制。屈曲约束支撑拉压受力均等,承载力高,延性性能好,循环荷载作用下有良好的耗能能力,目前主要应用在新建结构和加固项目。采用屈曲约束支撑可有效改善装配式混凝土框架的抗震性能。目前,对于屈曲约束支撑装配式混凝土框架结构的研究尚缺乏。本文通过科学的试验研究和系统的理论分析,研究了屈曲约束支撑装配式混凝土框架的抗震性能,开展工作如下:(1)开展了1榀现浇混凝土框架和4榀屈曲约束支撑装配式混凝土框架的拟静力试验,研究参数为梁柱节点预制形式、预埋件构造形式、支撑布置形式以及有无布置支撑。详细考察了不同参数影响下现浇混凝土框架和屈曲约束支撑装配式混凝土框架的滞回性能和破坏模式。(2)对各个试件的试验结果进行深入的理论分析和对比讨论,详细研究了现浇混凝土框架和屈曲约束支撑装配式混凝土框架的骨架曲线特征点、强度、刚度退化、延性和耗能能力等抗震性能指标,并着重分析了框架结构重点部位的应变变化规律和屈服顺序。(3)利用ABAQUS程序分别建立了1榀现浇混凝土框架和4榀屈曲约束支撑装配式混凝土框架的有限元模型,分别获得了试件在静力作用下的力(P)-位移(Δ)关系曲线,并分别对现浇混凝土框架和屈曲约束支撑装配式混凝土框架进行非线性全过程分析。(4)利用ABAQUS有限元软件建立屈曲约束支撑装配式混凝土框架简化模型,并对简化模型进行了讨论,应用简化模型选取荷载参数、材料参数和几何参数以及屈曲约束支撑参数,对框架结构进行了系统分析,确定影响框架力(P)-位移(Δ)关系曲线的重要参数和影响规律。
[Abstract]:The prefabricated concrete frame is one of the main forms of the building industrial assembly concrete structure, which has the advantages of fast construction speed, small site pollution, less labor consumption, green environmental protection and so on. However, the construction precision of fabricated concrete frame is high, and the precast Liang Zhu members are assembled in the field, which leads to the improvement of the overall force and seismic performance. Therefore, the number of stories and the application range of the assembled concrete frame structure are limited to a certain extent. Buckling restrained braces have the advantages of equal tension and compression, high bearing capacity, good ductility and good energy dissipation capacity under cyclic load. At present, they are mainly used in new structures and reinforcement projects. The buckling restrained bracing can effectively improve the seismic performance of prefabricated concrete frame. At present, there is a lack of research on buckling restrained braced reinforced concrete frame structure. In this paper, the aseismic behavior of buckle-restrained braced concrete frame is studied by scientific experimental research and systematic theoretical analysis. The work is as follows: (1) Quasi-static test of one cast-in-place concrete frame and four buckle-restrained braced assembled concrete frames are carried out. The parameters are pre-fabricated form of Liang Zhu node and structural form of embedded parts. Support layout form and no arrangement support. The hysteretic behavior and failure mode of cast-in-place concrete frame and buckle-restrained braced assembled concrete frame under the influence of different parameters are investigated in detail. The characteristic points of skeleton curve, strength, stiffness degradation, ductility and energy dissipation capacity of cast-in-place concrete frame and buckle-restrained braced prefabricated concrete frame are studied in detail. The strain variation law and yield order of key parts of frame structure are analyzed emphatically. The finite element models of one cast-in-place concrete frame and four buckle-restrained braced fabricated concrete frames are established by ABAQUS program. The force and displacement (螖) curves of the specimen under static action are obtained, respectively. The nonlinear whole process analysis of cast-in-place concrete frame and buckle-restrained braced assembled concrete frame is carried out respectively. The simplified model of buckle-constrained braced prefabricated concrete frame is established by using ABAQUS finite element software. The simplified model is discussed, and the load parameter, material parameter, geometric parameter and buckling constraint bracing parameter are selected, and the frame structure is systematically analyzed. The important parameters and the influence law of the influence curve of the frame force and displacement (螖) are determined.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.11;TU37

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