防爆墙迎爆面反射压力系数计算方法研究  

Calculation method for reflected pressure coefficient of a blast wall

作　　者：洪武[1,2] 范华林[2,3] 徐迎[1] 金丰年[1] 夏志成[1] 

机构地区：[1]解放军理工大学工程兵工程学院/理学院,南京210007 [2]重庆交通大学(桥梁)结构工程重点试验室,重庆400074 [3]河海大学力学材料学院/岩土力学与堤坝工程教育部重点实验室,南京210098

出　　处：《振动与冲击》2012年第19期109-112,117,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金创新研究群体科学基金(51021001);国家自然科学基金(51078351);重庆交通大学桥梁结构工程重点实验室开放基金(CQSLBF-Z11-1)

摘　　要：研究防爆墙迎爆面荷载计算方法有助于防爆墙的科学设计和合理使用。爆炸产生的反射冲击波压力是作用在防爆墙上的主要荷载,由入射压力和与相应的反射压力系数的乘积得到。针对墙体变形情况下作用于防爆墙上的反射压力系数的计算方法进行了研究,发现作用于墙体的反射压力系数和墙体变形没有直接关系。基于这一现象,将墙体变形和冲击波墙面反射解耦考虑,提出了反射压力系数的计算方法。对比了地面爆炸及近地表空中爆炸对墙体反射压力系数分布规律的差异,建议了近地表空中爆炸时墙体反射压力系数的计算方法。Exploring an appropriate method to calculate blast loads against blast walls is helpful for their design and applications. Reflected pressure of blast waves is the main load acting on a blast wall, it is acquired with an incident pressure multiplied by a reflected pressure coefficient. Numerical simulations were adopted to study the reflected pressure coefficient considering the deformation effects of the blast wall under blast loads. According to the numerical simulation, it was shown that the deformation of the blast wall has little influence on the reflection of the blast wave, so the deformation of the blast wall and the reflected pressure are decoupled; the prediction equation of the reflected pressure coefficient on the blast wall along its height is suggested based on the numerical simulations in cases of ground explosion and subsurface explosion.

关 键 词：防爆墙 防爆机理 反射压力系数 

分 类 号：TU391[建筑科学—结构工程]