大跨度波形钢腹板连续刚构桥PBL连接件传力机理研究
发布时间：2018-07-22 20:46
【摘要】：随着波形钢腹板组合箱梁桥的迅速发展,作为其关键构件的剪力连接件越来越受到重视。其中,PBL连接件因抗剪刚度大、延性好而得到广泛应用。目前,对于波形钢腹板组合箱梁桥的PBL剪力连接件研究还不成熟,国内还没有统一的规范对PBL剪力连接件的设计作出明确规定。以某波形钢腹板箱梁的顶板与腹板连接的PBL连接件为研究对象,考虑4个因素设计11类静载破坏试验模型,结合非线性有限元分析,对PBL连接件作了详细的研究,主要研究内容如下：对试件的试验破坏过程及破坏形态进行描述,根据破坏形态把试件分成4类,然后分别对4类试件的承载机理和荷载滑移规律进行分析。分析了钢板开孔孔径、贯穿钢筋直径、钢板板厚、预应力对连接件承载过程及破坏形态的定性影响和对承载力的定量影响。为了与试验结果相互验证,还通过ANSYS分析软件建立有限元模型进行了试验加载过程的非线性分析。最后,综合有限元结果和试验结果,提出了一种PBL连接件的设计方法。
[Abstract]:With the rapid development of the corrugated steel web composite box girder bridge, the shear connectors, which are the key components of the bridge, are paid more and more attention. Among them, PBL joints are widely used because of their high shear stiffness and ductility. At present, the research on PBL shear connectors of composite box girder bridges with corrugated steel webs is not mature, and there is no uniform specification for the design of PBL shear connectors in China. Taking the PBL connection of a corrugated steel web box girder as the research object, considering four factors, 11 kinds of static load failure test models are designed, and the PBL connection is studied in detail with nonlinear finite element analysis. The main research contents are as follows: the failure process and failure mode of the specimens are described. According to the failure patterns, the specimens are divided into four categories, and then the load-bearing mechanism and load-slip law of the four types of specimens are analyzed respectively. This paper analyzes the qualitative and quantitative effects of aperture of steel plate, diameter of steel bar through, thickness of plate and prestress on bearing process and failure mode of joint and its quantitative effect on bearing capacity. In order to verify the test results, a finite element model was established by ANSYS software to analyze the nonlinear behavior of the test loading process. Finally, a design method of PBL connectors is proposed based on the results of finite element method and experiment.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U448.23
[Abstract]:With the rapid development of the corrugated steel web composite box girder bridge, the shear connectors, which are the key components of the bridge, are paid more and more attention. Among them, PBL joints are widely used because of their high shear stiffness and ductility. At present, the research on PBL shear connectors of composite box girder bridges with corrugated steel webs is not mature, and there is no uniform specification for the design of PBL shear connectors in China. Taking the PBL connection of a corrugated steel web box girder as the research object, considering four factors, 11 kinds of static load failure test models are designed, and the PBL connection is studied in detail with nonlinear finite element analysis. The main research contents are as follows: the failure process and failure mode of the specimens are described. According to the failure patterns, the specimens are divided into four categories, and then the load-bearing mechanism and load-slip law of the four types of specimens are analyzed respectively. This paper analyzes the qualitative and quantitative effects of aperture of steel plate, diameter of steel bar through, thickness of plate and prestress on bearing process and failure mode of joint and its quantitative effect on bearing capacity. In order to verify the test results, a finite element model was established by ANSYS software to analyze the nonlinear behavior of the test loading process. Finally, a design method of PBL connectors is proposed based on the results of finite element method and experiment.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U448.23
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