Abstract:In order to study the collapse-resistant behavior of RC frame under impact load, in this paper, a numerical simulation analysis of two 1-story and four 3-story RC frame models under impact load was carried out by using the finite element software LS-DYNA.The major variable in this analysis is longitudinal reinforcement ratio. As is shown in the results, each frame beam has experienced the obvious arch effect and catenary effect under impact load. In addition, the arch effect become more obvious with the decrease of reinforcement ratio. The reinforcement ratio also has an influence on the collapse-resistant behavior of frame, the high reinforcement ratio can result in relatively strong bearing and energy dissipation capacity of the frame, and the vierendeel effect can improve the load bearing capacity of multi-story frame structure. Based on the results of numerical calculation, the collapse-resistant behavior of RC frame was analyzed, and some strengthen measures were proposed accordingly.
何庆锋 刘义仁 周超 易伟建. 冲击作用下钢筋混凝土框架抗连续倒塌数值模拟[J]. 振动与冲击, 2016, 35(23): 56-64.
He Qing-feng, Liu Yi-ren, Zhou Chao, Yi Wei-jian. Numerical Simulation of Progressive Collapse of Reinforced Concrete Frame under Impact Load. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(23): 56-64.
[1] Pearson C, Delatte N. Ronan point apartment tower collapse and its effect on building codes. Journal of Performance of Constructed Facilities, 2005, 19(2): 172—177
[2] Byfield M, Paramasivam S. Murrah Building Collapse: Reassessment of the transfer girder. Journal of Performance of Constructed Facilities, 2012, 26(4): 371—376
[3] Zdenfk P, Bazant. Mechanics of progressive collapse: Learning from World Trade Center and building demolitions. Journal of Performance of Constructed Facilitics, 2007, 133(3): 308—319
[4] Kang H, Kim J. Progressive collapse of steel moment frames subjected to vehicle impact. Journal of Performance of Constructed Facilities, 2014, 4(14): 1—11
[5] Stinger S M, Orton S L. Experimental evaluation of disproportionate collapse resistance in reinforced concrete frames. ACI Structural Journal, 2013, 110(3): 521—529
[6] Qian K, Li B. Analytical evaluation of the vulnerability of RC frames for progressive collapse caused by the loss of a corner column. Journal of Performance of Constructed Facilities, 2013, 29: 1—14
[7] Yi W J, He Q F, Xiao Y, et al. Experimental study on progressive collapse-resistant behavior of reinforced concrete frame structures. ACI Structural Journal, 2008, 105(4), 433—439
[8] 李易,叶列平,陆新征. 基于能量方法的RC框架结构连续倒塌抗力需求分析Ⅰ:梁机制[J],建筑结构学报, 2011,32(11):1-8.(LI Yi, YE Lieping, LU Xinzheng. Progressive collapse resitance demand of RC frame structures based on energy method I:beam mechanism[J]. Journal of Building Structures,2011,32(11):1-8.(in Chinese))
[9] 苏幼坡,张玉敏,许琳琳,任延庆,明伟. 突加荷载作用下钢筋混凝土框架梁性能试验研究[J],建筑结构学报,2009,s2(17):92-97.(SU Youpo, ZHANG Yumin, XU Linlin, REN Yanqing, MING Wei. Experimental research of reinforced concrete frame beam under a sudden load[J]. Journal of Building Structures,2009,s2(17):92-97.(in Chinese))
[10] Kishi N, Nakano O, Matsuoka K G, et al. Experimental study on ultimate strength of flexural-failure-type RC beams under impact loading. In: Transactions of the 16th International Conference on Structural Mechanics in Reactor Technology (SMIRT). Washington DC, 2001b, 15—20
[11] Kishi N, Mikami H, Matsuoka K G, et al. Impact behavior of shear-failure-type RC beams without shear rebar. International Journal of Impact Engineering, 2002a, 27(9): 955—968
[12] Kishi N, Mikami H, Ando T. Impact-resistant behaviour of shear-failure-type RC beams under falling-weight impact loading. In: Proceedings of the 7th International Conference on Structures under Shock and Impact. Ashurst Lodge, 2002b, 499—508
[13] 赵德博, 易伟建. 钢筋混凝土梁抗冲击性能和设计方法研究. 振动与冲击, 2015, 34(11): 139—145
[14] 何庆锋, 刘义仁, 蒋曲翀, 易伟建. 锤击荷载作用下钢筋混凝土框架连续倒塌性能试验研究. 湖南大学学报(自然科学版),2015,42(1):40-46
[15] WenjunGuo, RomonGilsanz. Nonlinear static analysis procedure-progressive collapse evaluation. Design Engineers of Gilsanz Murray Steficek, 2003, 15—20
[16] Soleimani S M, Banthia N, Mindess S. Behavior of RC beams under impact loading: some new findings. In: Proceedings of the Sixth International Conference on Fracture Mechanics of Concrete and Concrete Structures. London, 2007, 867—874