配置HRB500E钢筋混凝土梁柱中节点试验及有限元研究

发布时间：2018-03-01 03:37

本文关键词： HRB500E 梁柱节点抗震性能反复荷载单调荷载　出处：《华中科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着我国经济的快速发展和建筑形式的多样化,普通钢筋在资源和环境等的约束下,已经难以满足我国土木工程领域新形势的发展需求,推广应用高强钢筋成为了历史的必然选择。由于我国是全球地震活动强烈与地震灾害严重的国家之一,建筑结构抗震设计已成为结构设计的关键内容,其中对于大量建筑所采用的钢筋混凝土框架结构,其梁柱节点是决定结构抗震性能的关键部位。HRB500E是我国目前针对现有国情开发的一种新型高强抗震钢筋,对配置HRB500E高强抗震钢筋的钢筋混凝土梁柱节点的试验研究还很缺乏。因此,本文采用试验和有限元分析两种研究方法对配置HRB500E的钢筋混凝土梁柱中节点分别在单调和反复荷载下的受力性能进行深入研究,为在实际工程中推广应用HRB500E高强抗震钢筋提供试验和理论依据。首先,本文参照现行相关规范设计了4个钢筋混凝土梁柱中节点足尺试件,其中2个配置HRB500E,另2个配置HRB335,并对这些试件进行了低周往复加载试验。对配置HRB500E的试件在裂缝发展、破坏形态、滞回特性、耗能、延性和刚度退化等方面与等体积配置HRB335的试件作了对比分析。结果表明:按照我国现行规范设计的配置HRB500E的钢筋混凝土梁柱中节点与等体积配置HRB335的钢筋混凝土梁柱中节点存在着类似的破坏现象,同时两者均具有良好的延性。但配置HRB500E的钢筋混凝土梁柱中节点有更高的承载力、变形能力和耗能能力,表现出了良好的抗震性能。其次,对参照我国现行相关规范设计的6个钢筋混凝土梁柱中节点足尺试件进行了单调和反复荷载试验。其中2个配置HRB500E,2个配置HRB335,2个配置HRB600。每种相同钢筋型号的试件设计参数完全相同,一个施加低周循环往复荷载,另一个施加单调反对称荷载。研究加载模式的差别对钢筋混凝土梁柱中节点的影响,并将配置HRB500E的试件与配置HRB600、HRB335的试件进行各方面的对比,进一步考察了应用HRB500E钢筋的技术优势。最后,本文借助ABAQUS有限元分析软件对受单调荷载的钢筋混凝土梁柱中节点试件建立相应的有限元模型,并与试验结果进行详细对比分析,验证了有限元模型的有效性,在此基础上进行了相关参数分析。通过重点研究节点核心区配箍率和轴压比与节点区域钢筋应变的关系,全面研究了节点核心区箍筋的作用以及轴压比的具体影响规律。
[Abstract]:With the diversification of China's rapid economic development and construction in the form of ordinary steel in resources and environmental constraints, has been difficult to meet the development needs of the new situation in China in the field of civil engineering, popularization and application of high strength steel has become the inevitable choice of history. Because China is one of the global seismicity and earthquake disaster seriously country, seismic design of building structure has become the key content of the structural design, the reinforced concrete frame structure with a large building, the beam column joint is.HRB500E key parts determine the structural seismic performance is our current existing conditions for the development of a new type of high strength reinforced, experimental study on reinforced concrete beam column joints the configuration of HRB500E high strength reinforced is still lacking. Therefore, this paper using experimental and finite element analysis of reinforced two research methods of HRB500E mixed configuration Concrete beam columns node respectively under monotonic and cyclic loading by in-depth study of performance for HRB500E application in practical engineering to provide experimental and theoretical basis of high strength reinforced. First of all, according to the current standard design of 4 full-scale reinforced concrete beam columns joint specimens, including 2 configuration HRB500E the other 2 configurations of HRB335, and the low cyclic loading tests on the specimens. The failure pattern of the specimen in the crack development, configuration HRB500E, hysteretic characteristics, ductility and energy dissipation, stiffness degradation and volume configuration of HRB335 specimens were analyzed. The results showed that: according to the reinforced concrete our current standard beam columns node design of the configuration of the HRB500E reinforced concrete Liang Zhuzhong nodes with equal volume configuration HRB335 exist the phenomenon is similar, and both have good ductility. But the allocation of HRB5 Reinforced concrete beam columns node 00E has higher bearing capacity, deformation and energy dissipation capacities, showed good seismic performance. Secondly, according to the related regulations of our country design of 6 reinforced concrete beam columns joint full-scale specimens of monotonic and cyclic loading test. The 2 configuration HRB500E the 2 configuration HRB335,2 configuration HRB600. each kind of the same type reinforced specimen design parameters are exactly the same, a week under low cyclic loading, another applied monotonic antisymmetric loading. Influence of loading mode difference of RC Liang Zhuzhong node, and the specimen and the HRB600 configuration of HRB500E, compare the the HRB335 specimens, further investigated the technical advantages used HRB500E steel. Finally, the test node of reinforced concrete beam columns under monotonic load by means of the finite element analysis software ABAQUS The establishment of a corresponding finite element model, and makes a detailed comparative analysis and experimental results verify the validity of the finite element model, based on the analysis of relevant parameters. Through the research on the core zone of the joint stirrup ratio and axial compression ratio and the relationship between regional node reinforcement strain, a comprehensive study of the specific influence of axis the pressure ratio of stirrup joint core role.

【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU375.1

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