NUMERICAL ANALYSIS ON THE COLLAPSE REPONSE OF A RC FRAME SUBJECTED TO IMPACT LOADING BASED ON MULTI-SCALE MODEL
Cheng Xiao-wei1, Li Yi1,2, Lu Xin-zheng3, Yan Wei-ming1,2
1. Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing, 100124;
2. Beijing Collaborative Innovation Center for Metropolitan Transportation, Beijing University of Technology, Beijing, 100124;
3. Key Laboratory of Civil Engineering Safety and Durability of Ministry of Education, Tsinghua University, Beijing, 100084
In order to guarantee the accuracy and improve the computational efficiency of numerical analysis on the progressive collapse of the RC frames under impact loading, a multi-scale finite element model is established based on the finite element software LS-DYNA. The structural progressive collapse response of a RC frame subjected to impact loading is analyzed by using the alternative path (AP) analysis and the impact analysis respectively. The results show that the structural dynamic response is underestimated and the wrong collapse mode is obtained via the AP method in which the impact loading and its consequences, i.e. the initial damage, displacement and velocity of the structural members adjacent to the impacted column, are neglected. On the other hand, the dynamic response and the damage mode of the RC frame can be accurately simulated via the multi-scale finite element model with high computational efficiency. The computation time when using the multi-scale model is only about one third of that by using the detailed model which is suitable for the impact analysis for the entire structural systems.
程小卫1,李 易,,陆新征3,闫维明1,2. 基于多尺度模型的RC框架撞击倒塌响应数值分析[J]. 振动与冲击, 2016, 35(5): 82-88.
Cheng Xiao-wei1, Li Yi1,2, Lu Xin-zheng3, Yan Wei-ming1,2. NUMERICAL ANALYSIS ON THE COLLAPSE REPONSE OF A RC FRAME SUBJECTED TO IMPACT LOADING BASED ON MULTI-SCALE MODEL. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(5): 82-88.
[1] 陆新征,叶列平,缪志伟. 建筑抗震弹塑性分析[M]. 中国建筑工业出版社,2009.
[2] Li Z X, Chan H T, Yu Y, Sun Z H. Concurrent multi-scale modeling of civil infrastructures for analyses on structural deterioration Part I: Modeling methodology and strategy[J]. Finite Elements in Analysis and Design, 2009,45(11): 782-794.
[3] Oskay C, Fish J. Multi-scale modeling of fatigue for ductile materials[J]. International Journal of Multi-scale Computational Engineering, 2004, 2(3): 1-30.
[4] 陆新征,林旭川,叶列平. 多尺度有限元建模方法及其应用[J]. 华中科技大学学报,2008, 25(4): 76-80.
LU Xin-zheng, LIN Xu-chuan, YE Lie-ping. Multi-scale finite element modeling and its application in structural analysis[J]. Journal of Hua zhong University of Science and Technology, 2008, 25(4): 76-80.
[5] 石永久,王萌,王元清. 基于多尺度模型的钢框架抗震性能分析[J]. 工程力学,2011, 28(12): 20-26.
SHI Yong-jiu, WANG Meng, WANG Yuan-qing. Seismic behavior analysis of steel frame by multi-scale calculation method[J]. Engineering Mechanics, 2011, 28(12 ): 20-26.
[6] 黄银燊,袁理明,吕鹏. 多尺度有限元建模及在结构设计中的应用[J]. 武汉工业学院学报,2012, 31(4): 73-77.
HUNG Yin-shen, YUAN Li-ming, LV Peng. Multi-scale finite element modeling and its application in structural design[J]. Journal of Wuhan Polytechnic University,2012, 31(4): 73-77.
[7] 何水涛,陆新征. 超高车辆撞击钢桥上部结构模型试验研究[J]. 振动与冲击,2010, 31(5): 31-35.
HE Shui-tao, LU Xin-zheng. Tests for collision between over-high trucks and steel bridge superstructures[J]. Journal of Vibration and Shock, 2010, 31(5): 31-35.
[8] 李易. RC框架结构抗连续倒塌设计方法研究[D]. 北京:清华大学,2011.
[9] 师燕超. 爆炸荷载作用下钢筋混凝土结构的动态响应行为及损伤破坏机理[D]. 天津: 天津大学, 2009.
[10] Hallquist J O. LS-DYNA Keyword User's Manual[M].California: Livermore Software Technology Corporation,2012.
[11] 陆新征,李易,叶列平. 混凝土结构防连续倒塌理论与设计方法研究[M]. 北京中国建筑工业出版社,2011.
[12] Malvar L J, Ross C A. Review of strain rate effects for concrete in tension[J]. ACI Materials Journal, 1998, 96(5): 735-739.
[13] Li J, Hao H. Numerical study of structural progressive collapse using substructure technique[J]. Engineering Structures, 2013, 52(7): 101-113.
[14] Thilakarathna H M I, Thambiratnam D P, Dhanasekar M, et al. Numerical simulation of axially concrete columns under transverse impact and vulnerability assessment[J], International Journal of Impact Engineering, 2010, 37(11): 1100-1112.
[15] Fujikake K, Li B, Soeun S. Impact response of reinforced concrete beam and its analytical evaluation[J], Journal of Structural Engineering, ASCE, 2009, 135(8): 938-950.