近距离爆炸下ECC涂层加固砌体填充墙抗爆性能研究

摘要
图/表
参考文献(12)
相关文章 (15)

全文: PDF (2224 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要工程水泥基复合材料（Engineered Cementitious Composite, ECC）是一种韧性强、抗拉能力突出、吸能效果显著的新型水泥基复合材料，具有良好的动态力学性能和冲击承载能力，在爆炸冲击防护领域具有较高的开发价值。为探究ECC抗爆加固性能，开展了6组砌体填充墙近距离爆炸试验，得到了多种工况下墙体损伤形态。结果表明，ECC涂层大幅提升了墙体的爆炸防护能力，有效抑制了墙体形变及损伤，避免了震塌碎块的产生及飞溅，具有良好的抗爆加固性能。通过对比墙体在不同涂覆方式、炸药量和涂层厚度条件下的损伤差异，分析了ECC涂层加固机理，并发现背爆面单面加固比双面加固更具效益比。在自定义ECC材料模型基础上，建立了分离式砌体墙有限元模型，并验证了材料模型和计算方法的可行性。通过模拟爆炸试验发现，在达到某一阈值前，增大涂层厚度及粘结强度，对提升ECC涂层抗爆加固效果作用明显。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	杨谨鸿1
	李秀地1
	张波2
	陈昊2
	王起帆1
	尚敦敏1

关键词 ：工程水泥基复合材料, 砌体填充墙, 爆炸试验, 抗爆加固, 数值模拟

Abstract：Engineered cementitious composite (ECC） is a new type of cementitious composite material with high toughness, tensile strength and energy absorption capacity. With its good dynamic mechanical properties and impact bearing capacity, ECC has shown great development value in the field of explosion impact protection. In order to explore the anti-explosion reinforcement performance of ECC, six groups of close-in explosion tests of masonry infilled walls were carried out, by which the damage patterns of walls under various working conditions were obtained. The results show that ECC coating has good anti-explosion reinforcement performance as it significantly improves the explosion protection ability of walls, effectively restrains the deformation and damage of walls, and eliminates the generation or splash of collapse fragments. By comparing the damage differences of walls under different coating modes, different explosive quantities and different coating thicknesses, the reinforcement mechanism of ECC coating was analyzed, and the analysis shows that the single-sided reinforcement on the back is more profitable than the double-sided reinforcement. Based on customizing ECC material simulation model, the finite element model of separated masonry wall was established, and the feasibility of the material model and the calculation method was verified. The simulation results show that before reaching a certain threshold, increasing the coating thickness or bonding strength has an obvious effect on improving the anti-explosion reinforcement effect of ECC coating.

Key words： engineered cementitious composite (ECC） masonry infilled wall explosion test anti-explosion reinforcement numerical simulation

收稿日期: 2022-06-14 出版日期: 2023-08-28

引用本文:

杨谨鸿1，李秀地1，张波2，陈昊2，王起帆1，尚敦敏1. 近距离爆炸下ECC涂层加固砌体填充墙抗爆性能研究[J]. 振动与冲击, 2023, 42(16): 10-18.
YANG Jinhong1，LI Xiudi1，ZHANG Bo2，CHEN Hao2，WANG Qifan1，SHANG Dunmin1. Anti-explosion performance of ECC coating for strengthening masonry infilled wall under close-in explosion. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(16): 10-18.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I16/10

[1] Li V C. On engineered cementitious composites (ECC): a review of the material and its applications[J]. Journal of advanced concrete technology, 2003, 1(3): 215-230.
[2] 杨谨鸿,李秀地,王起帆,等. 工程水泥基复合材料动态力学性能及抗爆抗冲击能力研究进展[J]. 硅酸盐通报, 2021, 40(8): 2485-2496.
YANG Jin-hong, LI Xiu-di, WANG Qi-fan F, et al. Research progress on dynamic mechanical properties and anti-explosionand impact resistance performance of engineered cementitious composite [J]. Bulletin of the Chinese ceramic society, 2021, 40(8): 2485-2496.
[3] 谷音, 彭晨星. PVA-ECC加固桥墩抗震性能试验研究[J]. 振动与冲击, 2021, 40(14): 92-99.
GU Yin, PENG Chen-xing. Experimental study on the seismic behavior of bridge piers strengthened with PVA-ECC [J]. Journal of vibration and shock, 2021, 40(14): 92-99.
[4] 江世永,龚宏伟,姚未来,等. ECC材料力学性能与本构关系研究进展[J]. 材料导报, 2018, 32(23): 4192-4204.
JIANG Shi-yong, GONG Hong-wei, YAO Wei-lai, et al. A survey on mechanical behavior and constitutive model of engineered cementitious composite [J]. Materials reports, 2018, 32(23): 4192-4204.
[5] Tan K H, Yang En-hua, Kang S B, et al. Mechanical behaviour of engineered cementitious composites under quasi-static and high strain rate applications [J]. Advanced materials research, 2015, 1129: 10-18.
[6] Chen Zhi-tao, Yang Ying-zi, Yao Yan. Impact properties of engineered cementitious composites with high volume fly ash using SHPB test [J]. Journal of Wuhan university of technology-materials science edition, 2012, 27(3): 590-596.
[7] Heravi A A, Curosu I, Mechtcherine V. A gravity-driven split Hopkinson tension bar for investigating quasi-ductile and strain-hardening cement-based composites under tensile impact loading [J]. Cement and concrete composites, 2020, 105: 103430.
[8] 寇佳亮, 王华丞. 高延性混凝土板抗落石冲击性能试验研究[J]. 振动与冲击, 2020, 39(11): 239-247.
KOU Jia-liang, WANG Hua-cheng. Experimental study on rockfall impact resistance of high ductile concrete slabs [J]. Journal of vibration and shock, 2020, 39(11): 239-247.
[9] Adhikary S D, Chandra L R, Christian A, et al. SHCC-strengthened RC panels under near-field explosions [J]. Construction and building materials, 2018, 183: 675-692.
[10] 徐世烺, 李锐, 李庆华, 等. 超高韧性水泥基复合材料功能梯度板接触爆炸数值模拟[J]. 工程力学, 2020, 37(08): 123-133+178.
XU Shi-lang, LI Rui, LI Qing-hua, et al. Numerical simulation of functionally graded slabs of ultra-high toughness cementitious composites under contact explosion [J]. Engineering mechanics, 2020, 37(08): 123-133+178.
[11] Maalej M, Lin V W J, Nguyen M P, et al. Engineered cementitious composites for effective strengthening of unreinforced masonry walls [J]. Engineering structures, 2010, 32(8): 2432-2439.
[12] YANG En-hua, LI V C. Tailoring engineered cementitious composites for impact resistance[J]. Cement and concrete research, 2012, 42(8): 1066-1071.