内爆荷载下框架建筑的毁伤效应  

Damage Effect of Frame Buildings under Internal Blast Load

作　　者：朱宏伟 李邦杰 马峰 庞哲楠 ZHU Hongwei;LI Bangjie;MA Feng;PANG Zhenan(Rocket Force University of Engineering,Xi’an 710025,China;Troops No.96901,Beijing 100000,China)

机构地区：[1]火箭军工程大学,陕西西安710025 [2]96901部队,北京100000

出　　处：《火箭军工程大学学报》2025年第1期97-105,共9页Journal of Rocket Force University of Engineering

摘　　要：为深入剖析钢筋混凝土框架结构在内部爆炸荷载作用下的动态响应和毁伤机制,构建了具有工程实践意义的三层三跨钢筋混凝土框架结构作为研究对象,通过有限元数值模拟方法,精确量化分析了不同TNT炸药量及爆点位置对框架结构整体及主要构件(梁柱、楼板)的毁伤效应。结果表明,爆炸荷载引起的框架结构局部破坏与TNT炸药量呈正相关,且爆炸位置对结构的毁伤范围和毁伤程度具有显著影响;爆炸对框架结构造成的破坏主要有爆炸冲击波的直接作用和应力波的间接作用2种形式,其中爆炸冲击波对框架结构所造成的破坏程度更为严重;此外,钢筋混凝土板在爆炸荷载作用下表现出多样化的破坏模式,具体表现为爆炸冲击波造成的剪切和弯曲破坏以及由应力波传播引起的压碎破坏。To analyze the dynamic response and damage mechanism of reinforced concrete frame structures under internal blast loads,a three-story,three-span reinforced concrete frame structure with practical engineering significance was constructed and investigated.The damage effects of different TNT explosive quantities and explosion locations on the overall frame structure and main components(beams,columns,and floorslabs)were precisely quantified using a finite element numerical simulation method.The results showed that the local damage to the frame structures caused by the blast load is positively correlated with the amount of TNT,and that the explosion location has a substantial impact on the scope and degree of damage to the structure.The damage caused by explosions to frame structures included two forms:the direct effects of explosion shock waves and indirect effects of stress waves;the damage caused by the former is more severe.Furthermore,reinforced concrete slabs exhibited various damage modes under blast loads,specifically manifest as shear and bending damage caused by explosion shock wave,and crushing damage caused by stress wave propagation.

关 键 词：爆炸荷载 毁伤效应 框架结构 数值模拟 钢筋混凝土 

分 类 号：TU312.3[建筑科学—结构工程]