Seismic Enhancement of Welded Unreinforced Flange-Bolted Web Steel Moment Connections
Seismic Enhancement of Welded Unreinforced Flange-Bolted Web Steel Moment Connections
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DOI：
10.1061/(asce)st.1943-541x.0001575
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发表时间：
2016-11
期刊：
影响因子：
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通讯作者：
Machel Morrison;Doug Q. Schweizer;T. Hassan
中科院分区：
文献类型：
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作者：
Machel Morrison;Doug Q. Schweizer;T. Hassan
摘要1994年北岭地震中，焊接无筋翼缘-螺栓腹板（WUF-B）钢节点的广泛破坏引起了人们对这种连接的深入研究。尽管对焊接金属和连接细节进行了改进，但后北岭WUF-B连接无法获得足够的延性，无法用于特殊弯矩框架（SMF）。本研究提出了详细的有限元（FE）分析后北岭WUF-B连接，以更好地了解机制，在实验室测试中限制连接延性。从有限元分析的观察结果导致了改进的WUF-B连接的开发和数值研究，该连接结合了新的螺栓腹板设计和最近验证的技术，以促进远离连接接头的梁的塑性铰接。建议的连接提供了减少现场焊接和UT检查的好处，而不会牺牲连接的延性和抗震性能。最后，建议的连接是实验性的...
AbstractWidespread damage to welded unreinforced flange-bolted web (WUF-B) steel moment connections during the 1994 Northridge earthquake led to intensive research study of this connection. Despite the improvements to weld metal and connection details, the post-Northridge WUF-B connection was unable to attain sufficient ductility for use in special moment frames (SMFs). This study presents detailed finite element (FE) analysis of post-Northridge WUF-B connections to better understand the mechanisms which limited connection ductility in laboratory tests. Observations made from the FE analysis led to the development and numerical study of a modified WUF-B connection that combines a new bolted web design with a recently validated technique to promote plastic hinging of the beam away from the connection joint. The proposed connection provides the benefit of reduced field welding and UT inspection without sacrificing connection ductility and seismic performance. Finally, the proposed connection is experimental...