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浙江大学学报(工学版)
J4  2011, Vol. 45 Issue (8): 1405-1410    DOI: 10.3785/j.issn.1008-973X.2011.08.013
土木工程     
近爆作用下钢筋混凝土柱的损伤机理研究
龚顺风, 夏谦, 金伟良
浙江大学 结构工程研究所,浙江 杭州 310058
Investigation on damage mechanism of RC
column under close-in explosion
GONG Shun-feng, XIA Qian, JIN Wei-liang
Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, China
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摘要：

为了研究钢筋混凝土结构底层柱的抗爆性能,应用LS-DYNA软件对近爆作用下钢筋混凝土柱的损伤过程及破坏机理进行数值模拟分析,数值模型考虑应变率对钢筋和混凝土材料动力本构特性的影响以及炸药-空气-结构之间的流固耦合相互作用.结果表明,在爆炸冲击荷载作用下,钢筋混凝土柱表层混凝土首先开始剥落,受到约束的柱脚和柱顶混凝土发生冲剪破坏,在持续的横向变形作用下柱整体发生弯曲,产生一系列的横向裂缝；在等比例距离爆炸作用下,不同反射区的钢筋混凝土柱,受到的爆炸冲击荷载存在较大的差异,通常的比例定律不适用于近爆情形.
Abstract:

In order to investigate the antiexplosion performance of reinforced concrete column in ground floor, numerical simulations were conducted for the analysis on the damage process and failure mechanism of RC column under closein explosion using LS-DYNA software. The model involved the effects of strain rate on dynamic constitute characteristics of reinforcing bars and concrete material, as well as the coupled interactions of explosive-air-structure. The results show that the damages RC column under close-in blast loads may be characterized that the front surface layer concrete firstly starts spallation, then the constrained concrete at the bottom and top end of column takes place the punching-shear failure, after then the continuously transverse deformation induces the global bending of RC column, followed by distributed cracking perpendicular to longitudinal axis of the column; the blast loads acting on RC column located at different reflection zone with the same scaled distance display rather large differences, therefore, the traditional scaled law is no longer adapted to close-in explosion situation.
出版日期: 2011-09-08
:  TU 352  
基金资助:

浙江大学国防预研基金资助项目；浙江省“钱江人才”计划资助项目(QJD0702006).
作者简介: 龚顺风(1975－)，男，副教授，博导，从事钢筋混凝土结构的抗爆性能研究.E-mail:sfgong@zju.edu.cn.
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引用本文:

龚顺风, 夏谦, 金伟良. 近爆作用下钢筋混凝土柱的损伤机理研究[J]. J4, 2011, 45(8): 1405-1410.

GONG Shun-feng, XIA Qian, JIN Wei-liang. Investigation on damage mechanism of RC
column under close-in explosion. J4, 2011, 45(8): 1405-1410.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2011.08.013    或    https://www.zjujournals.com/eng/CN/Y2011/V45/I8/1405

［1］ LU Yong, GONG Shunfeng. An analytical model for dynamic response of beamcolumn frames to impulsive ground excitations ［J］. International Journal of Solids and Structures, 2007, 44(3/4): 779-798.
［2］ 魏雪英,白国良.爆炸荷载下钢筋混凝土柱的动力响应及破坏形态分析［J］.解放军理工大学学报：自然科学版,2007,8(5): 525-529.
WEI Xueying, BAI Guoliang. Dynamic response and failure models of RC column under blast load ［J］. Journal of PLA University of Science and Technology: Natural Science, 2007, 8(5): 525-529.
［3］ 阎石,王丹,张亮，等.爆炸荷载作用下钢筋混凝土柱损伤FEM分析［J］.工程力学,2008,25(增刊): 90-93.
YAN Shi, WANG Dan, ZHANG Liang, et al. Damage analysis for RC column under explosive loads ［J］. Engineering Mechanics, 2008, 25 (supplement.): 90-93.
［4］ GONG Shunfeng, LU Yong, TU Zhenguo, et al. Validation study on numerical simulation of RC response to closein blast with a fully coupled model ［J］. Structural Engineering and Mechanics, 2009, 32(2): 283-300.
［5］ 刘仁辉,石少卿,汪敏.地面爆炸条件下框架底层柱的破坏公式推导及数值模拟分析［J］.后勤工程学院学报,2008,24(1): 13-16.
LIU Renhui, SHI Shaoqing, WANG Min. Derivation of damage formula about firstfloor column and analysis of numerical simulation a conventional bomb explosion on the ground ［J］. Journal of Logistical Engineering University, 2008, 24(1): 13-16.
［6］ 龚顺风,金伟良,何勇.爆炸荷载作用下建筑结构倒塌的致命率［J］.浙江大学学报:工学版,2007,41(7): 1154-1158.
GONG Shunfeng, JIN Weiliang, HE Yong. Lethality rate of building collapse to blast loading ［J］. Journal of Zhejiang University: Engineering Science, 2007, 41(7): 1154-1158.
［7］ 李国强,孙建运,王开强.爆炸冲击荷载作用下框架柱简化分析模型研究［J］.振动与冲击,2007,26(1): 8-10.
LI Guoqiang, SUN Jianyun, WANG Kaiqiang. Research on a simplified frame column model to resist blast load ［J］. Journal of Vibration and Shock, 2007, 26(1): 8-10.
［8］ JACK W H, ARMENDT B F. Measurements of normally reflected shock parameters from explosive charges under simulated high altitude conditions ［R］. BRL Report No.1280, Maryland: Aberdeen Proving Ground, 1965.
［9］ 龚顺风,金伟良,何勇.内部爆炸荷载作用下钢筋混凝土板的动力响应研究［J］.振动工程学报,2008,21(5): 516-520.
GONG Shunfeng, JIN Weiliang, HE Yong. Dynamic response of RC slab subjected to internal explosion ［J］. Journal of Vibration Engineering, 2008, 21(5): 516-520.
［10］ 龚顺风,金伟良.内部爆炸荷载作用下钢筋混凝土板碎片抛射速度的预测［J］.工程力学,2009,26(9): 225-230.
GONG Shunfeng, JIN Weiliang. Prediction of debris launch velocity of reinforced concrete slab subjected to internal blast loading ［J］. Engineering Mechanics, 2009, 26(9): 225-230.
［11］ 袁林,龚顺风,金伟良.含泡沫铝防护层钢筋混凝土板的抗爆性能研究［J］.浙江大学学报:工学版,2009,43(2): 376-379.
YUAN Lin, GONG Shunfeng, JIN Weiliang. Investigation on antiexplosion performance of reinforced concrete slab with composite protective aluminium foam ［J］. Journal of Zhejiang University: Engineering Science, 2009, 43(2): 376-379.
［12］ BAKER W E. Explosions in air ［M］. Austin: University of Texas Press, 1973: 236-248.
［13］ 李翼祺,马素贞.爆炸力学［M］.科学出版社,1992: 150-153.
［14］ LSDYNA keyword user’s manual, version 970 ［M］. Livermore: Livermore Software Technology Corporation, 2003.
［15］ MALVAR L J, CRAWFORD J E, WESEVICH J W, et al. A plasticity concrete material model for DYNA3D ［J］. International Journal of Impact Engineering, 1997, 19(9/10): 847-873.
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