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《Journal of Building Structures》 2002-03
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Experimental Research on Cyclic Behavior of New Types of Beam column Connections in Highrise Steel Frames

SHI Yongjiu, LI Zhaofan, CHEN Hong, WANG Yuanqing(Department of Civil Engineering, Tsinghua University, Beijing 100084, China)  
This paper reports the experimental results of several new types of beam column connections. Three types of Enlarged Weld Access Hole (EWAH) connection details are proposed and eight full size specimens are tested under cyclic loading. Experimental results show that welding quality is the most important issue in achieving connection ductility. Weld access hole geometry and size have significant effect on ductility and failure mode of the connection. EWAH connections can relax the stress concentration at the end of access hole and introduce better ductility. With long access holes, the cause of EWAH connections fail will be turned to local buckling of the beam flange. This kind of failure mode reduces the fracture potential of the connection and improves connection ductility significantly.
【Fund】: 国家自然科学基金项目(59878026)资助。
【CateGory Index】: TU973.13
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