BFRP⁃FRCM加固砌体填充墙抗爆性能试验研究  

Experimental Study on Explosion Performance of Masonry Infilled Wall Reinforced by BFRP⁃FRCM

作　　者：毛永康 廖维张[1,2] 马超[1,2] 李会芳 闫秋实[3] 田栓柱 MAO Yongkang;LIAO Weizhang;MA Chao;LI Huifang;YAN Qiushi;TIAN Shuanzhu(Beijing Higher Institution Engineering Research Center of Civil Engineering Structure and Renewable Material,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Advanced Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Key Laboratory of Urban Security and Disaster Engineering of the Ministry of Education,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京建筑大学工程结构与新材料北京市高等学校工程研究中心,北京100044 [2]北京建筑大学北京未来城市设计高精尖创新中心,北京100044 [3]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124

出　　处：《防灾减灾工程学报》2023年第5期1122-1131,共10页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金项目(51878028);北京市自然科学基金项目(8222015;8212007)资助。

摘　　要：砌体填充墙在爆炸荷载作用下会发生破坏,甚至会出现碎片飞散等现象,从而造成人员伤亡或设备损坏。为了提高砌体填充墙的抗爆性能,提出采用玄武岩纤维网‑纤维增强水泥基(BFRP‑FRCM)复合层加固砌体填充墙,并通过现场爆炸试验研究复合层对砌体填充墙的抗爆加固效果,从破坏模式、碎块分布、位移响应和反射超压响应等角度对比分析了不同比例距离、加固方式砌体填充墙的抗爆性能,探究了BFRP‑FRCM复合层对砌体填充墙的抗爆加固机理。结果表明:BFRP‑FRCM加固能够有效减弱砌体墙在爆炸荷载下的破坏程度,迎爆面加固减小了砌体墙灰缝脱落范围、爆炸碎块的数量和飞行距离,但砌体墙的残余位移较大;背爆面加固对其位移的限制效果更好,墙体无碎块飞散现象;双面加固显著提高砌体墙的抗压和抗弯承载力,墙体的峰值位移和残余位移最小,即便在比例距离较小时,双面加固后仅在砌体墙中心部位出现局部变形及细小裂缝,并未出现碎块散落现象;引入冲量和强化参数分析不同加固方案对砌体墙抗爆性能提升的影响,在相同比例距离情况下,未加固墙体与加固墙体的反射超压和冲量大致相同,但BFRP‑FRCM加固能够提高砌体墙的强化参数。Once masonry infill walls were destroyed by explosion loadings,explosion-induced splashed fragments will cause injuries and equipment damage.This study proposed to apply the basalt fiber mesh-fiber reinforced cement matrix(BFRP-FRCM)composite layer to improve the explosion performance of masonry infilled walls.Then the reinforcement effect of BFRP-FRCM enhancing the masonry infilled walls under explosion loadings was experimentally studied.The enhancing mechanism was explored by analyzing the proportional distances and reinforced schemes that influence the failure mode,fragment distribution,displacement response and reflected overpressure.The results showed that BFRP-FRCM reinforcement can effectively reduce the explosion-induced damage of the masonry walls.Blasting surface reinforcement could reduce the range of the mortar joint shedding,the number of explosive fragments and the distance of fragments from the masonry wall,however,the residual displacement of the masonry wall was still large.Reinforcement of the back blasting surface could reduce the displacement response of the wall more effectively,and there was no visible fragmentation.Double surface reinforcement significantly improved the compressive bearing capacity and flexural bearing capacity of the masonry wall.Both the peak displacement and residual displacement of the wall were the smallest.On the other hand,even with the decrease of the proportional distance,only local deformation and small cracks appeared in the center of the masonry wall after double surface reinforcement,and did not occur the debris scattered.The influence of different reinforcement schemes on the explosion performance of masonry infill walls was analyzed by introducing impulse and strengthening parameters.Under the same proportional distance,the reflected overpressure and impulse of the unreinforced wall and the reinforced wall were roughly the same,but BFRP-FRCM reinforcement could improve the strengthening parameters of the masonry wall.

关 键 词：BFRP-FRCM 砌体填充墙 加固 抗爆试验 抗爆性能 

分 类 号：TU362[建筑科学—结构工程]