喷涂聚脲加固双向砌体墙抗燃气爆炸性能数值分析

doi:10.12382/bgxb.2023.0733

摘要/Abstract

摘要：

为研究燃气泄爆荷载作用下双向砌体墙的抗爆能力及聚脲对墙体的加固性能,采用有限元动力分析软件LS-DYNA对未加固砌体墙和聚脲迎爆面、背爆面、双面加固的墙体,分别施加荷载峰值大小不同、作用时间均为100ms的均布荷载,进行动态响应和抗爆性能分析。结果表明:未加固墙体在超压峰值为50kPa的燃气爆炸荷载作用下即发生倒塌破坏,其抵抗100ms爆炸冲击荷载的峰值介于40kPa和50kPa之间;相对于迎爆面加固双向墙体,背爆面加固的方式更加经济实用,在50kPa荷载作用下,迎爆面加固的墙体发生开裂倒塌,而背爆面和双面加固墙体分别只有35.3mm和33.6mm的位移,且背部的聚脲涂层能有效防止碎片飞溅。

关键词: 聚脲, 砌体, 爆炸荷载, 有限元模拟

Abstract:

In order to study the anti-explosion performance of two-way masonry wall and the reinforcement performance of polyurea on wall under the action of gas explosion, the finite element dynamic analysis software LS-DYNA is used to analyzethe dynamic response andanti-explosion capability of the unreinforced masonry wall and the walls reinforced by spraying the polyurea on the front, back and double-side under uniform loads with different peak values and action time of 100ms. The results show that: the unreinforced wall collapses under the gas explosion load with the peak overpressure of 50kPa, and its peak resistance to 100ms explosion impact load is between 40kPa and 50kPa; compared with the two-way wall reinforced by spraying the polyurea on its front, the backside reinforcement method is more economical and practical. The wall strengthened on the front cracks and collapses under 50kPa load, while the displacements of the back reinforced wall and the double-sided reinforced wall are only 35.3mm and 33.6mm, respectively, and the polyurea spraying on the back can effectively prevent debris splashing.

Key words: polyurea, masonry, explosion load, finite element simulation

中图分类号:

TU362

柳锦春, 王钰颖, 孙妮. 喷涂聚脲加固双向砌体墙抗燃气爆炸性能数值分析[J]. 兵工学报, 2023, 44(S1): 138-143.

LIU Jinchun, WANG Yuying, SUN Ni. Numerical Analysis of Gas Explosion Resistance of Two-way Masonry Walls Strengthened by Spraying Polyurea[J]. Acta Armamentarii, 2023, 44(S1): 138-143.

图/表 14

图1 砌体墙几何模型

Fig.1 Geometric model of masonry wall

表1 墙体材料参数

Table 1 Wall material parameter

材料	ρ/ (kg·m^-3)	E/ MPa	μ	σ_b/ MPa	σ_τ/ MPa	σ_s/ MPa	K_IC/ (N·m^-1)	τ
砌块	1150	380	0.15	1.00	0.50	9.0	120	0.03
砂浆	2100	4644	0.25	1.76	0.90	17.6	140	0.03

表2 混凝土框架材料参数

Table 2 Material parameters of concrete frame

材料	ρ'/(kg·m^-3)	E'/MPa	μ'
混凝土	2500	30000	0.2

图2 墙体SWW跨中位移时程曲线

Fig.2 Mid-span displacement-time curve of SWW wall

图3 墙体SWW破坏形态

Fig.3 Failure pattern of SWW wall

表3 聚脲材料参数

Table 3 Polyurea material parameters

ρ_p/(kg·m^-3)	E_p/MPa	μ_p	ε_m	N
1000	212	0.4	0.5	2

表4 σp-εp值

Table 4 σp-εp values

有效塑性应变ε_p	0	0.23	0.50
有效应力σ_p/MPa	11.5	15.5	24.4

图4 墙体SWY跨中位移时程曲线

Fig.4 Mid-span displacement-time curve of SWY wall

图5 墙体SWY破坏形态

Fig.5 Failure pattern of SWY wall

图6 墙体SWB跨中位移时程曲线

Fig.6 Mid-span displacement-time curve of SWB wall

图7 墙体SWB破坏形态

Fig.7 Failure pattern of SWB wall

图8 墙体SWS跨中位移时程曲线

Fig.8 Mid-span displacement-timecurve of SWS wall

图9 墙体SWS破坏形态

Fig.9 Failure pattern of SWS wall

表5 墙体跨中位移统计

Table 5 Wall mid-span displacement statistics

荷载/kPa	位移/mm
荷载/kPa	SWW	SWY	SWB	SWS
30	13.1	12.8	12.4	12.1
40	25.3	23.5	21.9	20.7
50	倒塌	倒塌	35.3	33.6
60	-	-	倒塌	倒塌

参考文献 14

[1]	韩永利, 陈龙珠. 燃气爆炸事故对住宅建筑的破坏[J]. 土木建筑与环境工程, 2011, 33(6): 120-123,128.
	HAN Y L, CHEN L Z. Failure analysis of residential buildings under the gas explosion accident[J]. Journal of Civil, Architectural & Environmental Engineering, 2011, 33(6): 120-123,128. (in Chinese)
[2]	王军国. 喷涂聚脲加固粘土砖砌体抗动载性能试验研究及数值分析[D]. 合肥: 中国科学技术大学, 2017.
	WANG J G. Experimental and numerical investigation of clay brick masonry walls strengthened with spray polyurea elastomer under blast loads[D]. Hefei: University of Science and Technology of China, 2017. (in Chinese)
[3]	马宏旺, 许清风, 陈龙珠, 等. 构造措施对砖混结构抗燃气爆炸影响的数值模拟研究[J]. 建筑科学, 2015, 31(3): 110-115.
	MA H W, XU Q F, CHEN L Z, et al. Research on the residential masonry building response under gas explosion with different construction details[J]. Building Science, 2015, 31(3): 110-115. (in Chinese)
[4]	芦建兵. 基于LS-DYNA的综合管廊燃气泄漏爆炸分析[J]. 工程与建设, 2020, 34(1): 13-16,20.
	LU J B. Gas leakage and explosion analysis of utility tunnel based on LS-DYNA[J]. Engineering and Construction, 2020, 34(1): 13-16,20. (in Chinese)
[5]	刘中宪, 王治坤, 张欢欢, 等. 燃气爆炸作用下地下综合管廊动力响应模拟[J]. 防灾减灾工程学报, 2018, 38(4):624-632.
	LIU Z X, WANG Z K, ZHANG H H, et al. Numerical simulation of blast-resistant performance of utility tunnel under gas explosion[J]. Journal of Disaster Prevention and Mitigation Engineering, 2018, 38(4):624-632. (in Chinese)
[6]	熊轩. 钢筋混凝土框架结构中砌体填充墙抗燃气爆炸性能研究[D]. 武汉: 武汉理工大学, 2013.
	XIONG X. Study on masonry infilled wall in reinforced concrete frame structure under gas explosion load[D]. Wuhan: Wuhan University of Technology, 2013. (in Chinese)
[7]	韩笑. 燃气爆炸荷载下砖砌墙体的动力响应研究[D]. 西安: 长安大学, 2012.
	HANG X. The dynamic response of brick masonry wall subjected to gas explosion load[D]. Xi'an: Chang'an University, 2012. (in Chinese)
[8]	GU M, LING X D, WANG H X, et al. Experimental and numerical study of polymer-retrofitted masonry walls under gas explosions[J]. Processes, 2019, 7(12): 863. doi: 10.3390/pr7120863 URL
[9]	LI Z, CHEN L, FANG Q, et al. Experimental and numerical study of basalt fiber reinforced polymer strip strengthened autoclaved aerated concrete masonry walls under vented gas explosions[J]. Engineering Structures, 2017, 152: 901-919. doi: 10.1016/j.engstruct.2017.09.055 URL
[10]	陈力, 郑康, 祝融, 等. CFRP加固砌体填充墙抗燃气爆炸泄爆荷载的优化设计及动力响应[J]. 天津大学学报(自然科学与工程技术版), 2018, 51(5): 547-553.
	CHEN L, ZHENG K, ZHU R, et al. Optimization design and dynamic responses of CFRP reinforced masonry infilled wall subjected to vented gas explosion[J]. Journal of Tianjin University (Science and Technology), 2018, 51(5): 547-553. (in Chinese)
[11]	彭培, 李展, 张亚栋, 等. 燃气爆炸作用下蒸压加气混凝土砌体墙的加固性能[J]. 爆炸与冲击, 2020, 40(3): 110-123.
	PENG P, LI Z, ZHANG Y D, et al. Performance of retrofitted autoclaved aerated concrete masonry walls subjected to gas explosions[J]. Explosion and Shock Waves, 2020, 40(3): 110-123. (in Chinese) doi: 10.1023/B:CESW.0000013673.95281.0f URL
[12]	HAN Y L, CHEN L Z. Mechanical model of domestic gas explosion load[J]. Transactions of Tianjin University, 2008, 14(6): 434-440. doi: 10.1007/s12209-008-0075-x URL
[13]	黄微波, 宋奕龙, 马明亮, 等. 喷涂聚脲弹性体抗爆抗冲击性能研究进展[J]. 工程塑料应用, 2019, 47(1): 148-153.
	HUANG W B, SONG Y L, MA M L, et al. Research progress on blast mitigation and shock resistance performance of spray polyurea elastomer[J]. Engineering Plastics Application, 2019, 47(1): 148-153. (in Chinese)
[14]	孙妮, 柳锦春, 王钰颖. 聚脲材料动态压缩力学行为的数值模拟研究[J]. 工程力学, 2023, 40(1): 144-154.
	SUN N, LIU J C, WANG Y Y. Numerical simulation research on dynamic compression mechanical behavior of polyurea[J]. Engineering Mechanics, 2023, 40(1): 144-154. (in Chinese)

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