全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
工程力学  2014 

火灾下拉剪组合作用对高强螺栓节点性能影响的试验研究

, PP. 97-103

Keywords: 火灾试验,高强螺栓连接,平齐端板式节点,腹板双角钢节点,拉剪效应组合

Full-Text   Cite this paper   Add to My Lib

Abstract:

火灾中节点的承载力随着温度的升高而降低,高温下梁的悬链线效应在梁内产生较大的拉力,高强螺栓连接节点通常在拉剪共同作用下发生破坏。采用自定义双线性炉温控制曲线,进行两类共8组高强螺栓连接节点的恒载升温试验,分析了端板式连接和腹板双角钢连接两类节点在高温以及拉剪共同作用下的变形发展及破坏规律。试验结果表明:高强螺栓连接节点区的梁端板、连接角钢、柱上翼缘及高强螺栓的温度接近,且较梁柱构件温度低50℃左右;节点刚度随着温度的升高而降低,且大约在节点温度达到500℃后刚度下降速度明显加快;火灾下8mm端板节点的变形集中于拉力较大侧端板及螺栓,16mm端板节点的变形则集中于拉力较大侧螺栓及柱上翼缘;腹板双角钢连接节点主要是角钢产生较大变形;两类节点失效温度随拉力或剪力的增加而减小,且同类节点在不同拉剪组合作用下的残余变形模态类似。

References

[1]  J, Wang Y C. Experimental study of structural fire behaviour of steel beam to concrete filled tubular column assemblies with different types of joints [J]. Engineering Structures, 2007, 29(12): 3485―3502.
[2]  Da L S, Santiago A, Real P V, et al. Behaviour of steel joints under fire loading [J]. Steel and Composite Structures, 2005, 5(4): 485―513.
[3]  K S, Davison J B, Burgess I W. Performance of beam-to-column joints in fire - A review [J]. Fire Safety Journal, 2008, 43(1): 50―62.
[4]  J A, Leon R T. Bolted steel connections: Tests on T-stub components [J]. Journal of Structural Engineering, 2000, 126(1): 50―56.
[5]  A M G, Bijlaard F S K, Gresnigt N, et al. Experimental assessment of the behaviour of bolted T-stub connections made up of welded plates [J]. Journal of Constructional Steel Research, 2004, 60(2): 269―311.
[6]  V, Rizzano G. Experimental analysis and modelling of bolted T-stubs under cyclic loads [J]. Journal of Constructional Steel Research, 2008, 64(6): 655―669.
[7]  K S, Burgess I W, Lennon T, et al. Moment-rotation-temperature curves for semi-rigid joints [J]. Journal of Constructional Steel Research, 2005, 61(3): 281―303.
[8]  Daryan A, Yahyai M. Behavior of bolted top-seat angle connections in fire [J]. Journal of Constructional Steel Research, 2009, 65(3): 531―541.
[9]  李国强, 于克强. 外伸端板节点在火灾下的转角-温度关系[J]. 钢结构, 2006, 21(3): 92―94. Wang Weiyong, Li Guoqiang. Rotation-temperature relationship of extended end-plate connection in fire [J]. Steel Construction, 2006, 21(3): 92―94. (in Chinese)
[10]  董毓利, 翁文林, 等. 外伸端板中节点火灾行为的试验研究[J]. 建筑结构, 2009, 39(5): 76―79. Sui Bingqiang, Dong Yuli, Weng Wenlin, et al. Experimental investigation of the behavior of extended end-plate connections under fire [J]. Building Structure, 2009, 39(5): 76―79. (in Chinese)
[11]  火灾下钢节点牢固性的研究与展望[J]. 工程力学, 2011, 28(4): 116―121. Yu Hongxia. Discussions on the robustness of steel connections in fire [J]. Engineering Mechanics, 2011, 28(4): 116―121. (in Chinese)
[12]  H, Burgess I W, Davison J B, et al. Experimental and numerical investigations of the behavior of flush end plate connections at elevated temperatures [J]. Journal of Structural Engineering, 2011, 137(1): 80―87.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133