Seismic Response of Partial-Joint-Penetration Welded Column Splices in Moment-Resisting Frames
Seismic Response of Partial-Joint-Penetration Welded Column Splices in Moment-Resisting Frames
复制标题
抗弯框架中部分焊透焊接柱接头的地震响应
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
A. Kanvinde
中科院分区：
文献类型：
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作者：
S. M. Shaw;K. Stillmaker;A. Kanvinde
现行标准要求特殊或中等抗弯框架（SMRF或IMRF）中的焊接柱拼接连接采用全接头焊透（CJP）坡口焊，以提高柱的全部抗弯强度。CJP焊接通常成本高，需要额外的材料、检查和劳动力。与梁柱连接相比，柱拼接具有适度的变形要求。这表明，也许与现代的，韧性额定焊接填料材料和焊接实践，PJP焊接接头可以提供可接受的性能下的地震负荷。本文对PJP焊接柱接头进行了五个足尺试验。测试矩阵调查了一系列参数，包括列大小以及连接细节的变化。试样循环加载在一个三点弯曲配置的拼接要求与那些在严重地震一致的加载协议是专门为此目的开发的非线性时程模拟的基础上。所有的全尺寸试样表现出优异的性能。一系列的有限元断裂力学模拟也被提出来协助推广的测试结果。从地震区IMRF和SMRF采用PJP焊接接头的角度来看，试验和模拟数据令人鼓舞。研究的局限性进行了概述，沿着与讨论未来的工作，以进一步发展的概念。
Current standards require that welded column splice connections in special or intermediate moment resisting frames (SMRFs or IMRFs) feature complete-joint-penetration (CJP) groove welds to develop the full flexural strength of the column. CJP welds are often costly, requiring additional material, inspection and labor. Compared to beam-to-column connections, column splices have modest deformation demands. This suggests that perhaps with modern, toughness-rated weld filler materials and welding practices, PJP welded splices may offer acceptable performance under seismic loads. A study featuring five full-scale tests on PJP-welded column splices is presented. The test matrix investigates a range of parameters including column sizes as well as variations in connection details. Specimens were loaded cyclically in a three-point bend configuration subjecting the splice to demands consistent with those in severe earthquakes; a loading protocol was developed specifically for this purpose based on nonlinear time history simulations. All the full-scale specimens exhibited excellent performance. A series of finite element fracture mechanics simulations is also presented to assist with the generalization of test results. The test and simulation data are encouraging from the perspective of adoption of PJP welded splices in IMRFs and SMRFs in seismic regions. Limitations of the research are outlined, along with discussion of future work to develop the concept further.