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Performance of Steel Girder Joints making use of Higher Strength Concrete

采用高强度混凝土的钢梁接头性能

基本信息

批准号：
04555109
负责人：
FUKUMOTO Yuhshi
金额：
$ 3.46万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

项目摘要

Performance of the connection which joined steel girders through high strength concrete was studied. The connection considered was of endplate type mixed (steel-to-concrete) connection. Experimental as well as analytical studies were carried out to investigate the performance, to verify its practicability, and to develop design procedure. Results of the research are summarized below :1.Experimental studies were carried out on the RC connection which joined composite girders. It was found that ductile behavior under positive moment could be obtained by the connection used.2.Constitutive model for concrete materials was developed. In the model, multiple cracking in the materials could be treated. The model was coded for a nonlinear Finite Element analysis program.3.Two dimensional Finite Element analyzes of the connections were carried out. It was found that the rigidity of the endplate could not significantly affect on the behavior of RC block. It was found that local deformation of the endplate might affect on the whole structural behavior.4.The strength of the connection depends on the strength of RC block or that of the endplate. Bending and shear strength of the connections can be reasonably evaluated by RC theory if the endplate is sufficiently rigid.5.Relative rotation of girders consists of the rotation in RC block and discontinuous angle due to local deformation of the endplate.6.Multi-composite-girder specimen which included endplate type RC connection was tested. Details of the connection was modified so as to reduce local deformation of endplate observed previous tests. Test results showed modification was quite satisfactory.7.RC connection used in the multi-girder specimen constructed a massive lateral beam. It was found that the lateral beam could be effective for load distribution. Effective width and section were also examined through the test.

对高强混凝土连接钢梁的节点性能进行了研究。所考虑的连接是端板型混合（钢-混凝土）连接。实验以及分析研究进行了调查的性能，以验证其实用性，并开发设计程序。主要研究成果如下：1.对钢筋混凝土组合梁连接节点进行了试验研究。研究发现，采用这种连接方式可以获得正弯矩下的延性性能。2.建立了混凝土材料的本构模型。该模型可以处理材料中的多裂纹问题。编制了非线性有限元分析程序。3.对节点进行了二维有限元分析。结果表明，端板刚度对钢筋混凝土砌块的受力性能影响不大。研究发现，端板的局部变形可能会影响整体结构的性能。4.连接的强度取决于钢筋混凝土块的强度或端板的强度。在端板刚度足够大的情况下，节点的抗弯和抗剪承载力可以用钢筋混凝土理论进行合理的计算。5.梁的相对转动包括钢筋混凝土块体的转动和端板局部变形引起的不连续角。对连接的细节进行了修改，以减少先前试验中观察到的终板局部变形。试验结果表明，改进措施是可行的。7.多梁试件采用钢筋混凝土连接，构成了一个大体积的侧梁。结果表明，侧梁可以有效地分配荷载。通过试验还考察了有效宽度和截面积。