Experimental Study on Cracking of Thick-Walled Welded Beam-Column Connections with Incomplete Penetration in Steel Bridge Piers
Experimental Study on Cracking of Thick-Walled Welded Beam-Column Connections with Incomplete Penetration in Steel Bridge Piers
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DOI：
10.1061/(asce)be.1943-5592.0000659
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发表时间：
2015-04
影响因子：
3.6
通讯作者：
Liang-jiu Jia;H. Ge;Toshimitsu Suzuki;Xiaoqun Luo
中科院分区：
文献类型：
--
作者：
Liang-jiu Jia;H. Ge;Toshimitsu Suzuki;Xiaoqun Luo
在1995年科比地震中，钢框架钢桥墩梁柱焊接节点发生断裂。此外，在现有的钢桥中，角焊缝和全熔透焊缝的焊接缺陷最近被报道。本文旨在研究未焊透深度和荷载历史对厚壁梁柱节点在强震作用下裂纹萌生和扩展的影响。五个试件在三种不同的加载历史下进行准静态加载，观察到不同的开裂模式。试验结果表明，裂纹的形成与未焊透深度的大小密切相关。
Fracture of welded beam-column connections was observed in steel moment-resisting frame steel bridge piers during the 1995 Kobe (Hyogoken-Nanbu) Earthquake. In addition, welding defects in fillet welds and full penetration welds were recently reported in existing steel bridges. This paper aims to study the effects of incomplete penetration depth and loading histories on crack initiation and propagation of thick-walled beam-column connections during a strong earthquake event. Five specimens under three different loading histories were loaded quasi-statically, and different cracking modes were observed. The experimental results indicate that the cracking modes are closely correlated with the size of the incomplete penetration depth.