Blast performance of reinforced concrete beams under high temperature

被引：0
|
作者：
Li Z. [1 ,2 ]
Zhu J. [2 ]
Yuan X. [2 ]
Liu B. [1 ,2 ]
Deng X. [1 ,2 ]
机构：
[1] Guangxi Key Laboratory of Green Building Materials and Construction Industrialization, Guilin University of Technology, Guilin
[2] College of Civil Engineering and Architecture, Guilin University of Technology, Guilin
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2023年 / 44卷
关键词：
blast loading; dynamic response; FEA; high-temperature; RC beam;
D O I：
10.14006/j.jzjgxb.2023.S1.0023
中图分类号：
学科分类号：
摘要：
To explore the mechanical properties of reinforced concrete (RC) beams under the combined action of high temperature and blast loads, refined finite element models were established by ABAQUS software to simulate the fire performance test and the explosion resistance test. The accuracy of the established finite element models was verified by comparing with the experimental results. Then, the blast performance of RC beams under high temperature was studied. The dynamic response of RC beams under different explosion distances and fire durations was analyzed, and the effects of reinforcement ratio and shear span ratio on the explosion resistance behavior of RC beams under high temperature were discussed. The results show that at the same explosion distance, with the increase of fire duration, the shear failure characteristics of RC beams become more obvious, and the mid-span deflection increases. Compared with the condition without fire, the mid-span deflection increases by 250% after fire exposure for 90 min. The increase in reinforcement ratio can significantly improve the blast performance of RC beams under high temperature, while with the rise of the shear span ratio, the blast performance of RC beams at high temperature is obviously decreased. © 2023 Science Press. All rights reserved.
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页码：203 / 211
页数：8
相关论文
共 33 条
  • [1] QIAN K, GENG SY, LIANG SL, Et al., Effects of loading regimes on the structural behavior of RC beam-column sub-assemblages against disproportionate collapse, Engineering Structures, 251, (2022)
  • [2] WENG Y H, QIAN K, FU F, Et al., Numerical investigation on load redistribution capacity of flat slab substructures to resist progressive collapse, Journal of Building Engineering, 29, (2020)
  • [3] QIAN K, LI B, ZJANG Z W., Testing and simulation of 3D effects on progressive collapse resistance of RC buildings, Magazine of Concrete Research, 67, 4, pp. 163-178, (2015)
  • [4] WU Bo, TANG Guihe, State-of-the-art of fire-resistance study on concrete structures in recent years, Journal of Building Structures, 31, 6, pp. 110-121, (2010)
  • [5] LU Zhoudao, ZHU Bolong, ZHOU Yuehua, Experimental study on fire response of simple supported reinforced concrete beams, China Civil Engineering Journal, 26, 3, pp. 47-54, (1993)
  • [6] DING Xingfa, YAO Fei, LI Zhe, Et al., Fire resistance of simple supported reinforced concrete beams under high temperature, Journal of Northeastern University (Natural Science), 36, 10, pp. 1476-1481, (2015)
  • [7] WU Bo, HONG Zhou, Fire resistance of simply-supported reinforced concrete beam, Journal of South China University of Technology (Natural Science Edition), 34, 7, pp. 82-87, (2006)
  • [8] ZHANG Weizhen, Experimental investigation and FEM analysis on simple reinforced concrete beams after elevated temperature, Journal of Harbin Institute of Technology, 41, 4, pp. 181-184, (2009)
  • [9] KUANG Zhiping, YANG Qiuhua, CUI Man, Experiment research and failure modes analyses of RC-beams under blast loading, Journal of Tongji University (Natural Science), 37, 9, pp. 1153-1156, (2009)
  • [10] LI Mengshen, LI Jie, LI Hong, Et al., Deformation and failure of reinforced concrete beams under blast loading, Explosion and Shock Waves, 35, 2, pp. 177-183, (2015)
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