爆炸作用下建筑结构高效毁伤评估方法

吕晋贤 吴昊 卢永刚 陈德

吕晋贤, 吴昊, 卢永刚, 陈德. 爆炸作用下建筑结构高效毁伤评估方法[J]. 爆炸与冲击, 2025, 45(1): 015101. doi: 10.11883/bzycj-2024-0053
引用本文: 吕晋贤, 吴昊, 卢永刚, 陈德. 爆炸作用下建筑结构高效毁伤评估方法[J]. 爆炸与冲击, 2025, 45(1): 015101. doi: 10.11883/bzycj-2024-0053
LYU Jinxian, WU Hao, LU Yonggang, CHEN De. High-efficiency assessment method of damage for building structures under explosions[J]. Explosion And Shock Waves, 2025, 45(1): 015101. doi: 10.11883/bzycj-2024-0053
Citation: LYU Jinxian, WU Hao, LU Yonggang, CHEN De. High-efficiency assessment method of damage for building structures under explosions[J]. Explosion And Shock Waves, 2025, 45(1): 015101. doi: 10.11883/bzycj-2024-0053

爆炸作用下建筑结构高效毁伤评估方法

doi: 10.11883/bzycj-2024-0053
基金项目: 国家自然科学基金(52078379)
详细信息
    作者简介:

    吕晋贤(1999- ),男,博士研究生,2111022@tongji.edu.cn

    通讯作者:

    吴 昊(1981- ),男,博士,教授,wuhaocivil@tongji.edu.cn

  • 中图分类号: O389; TU375; TU318

High-efficiency assessment method of damage for building structures under explosions

  • 摘要: 为综合评估战后建筑结构的毁伤等级,针对爆炸作用下典型地面建筑,即含填充墙钢筋混凝土(reinforced concrete,RC)框架结构,提出了损伤破坏和倒塌的高精度数值仿真分析方法,并通过RC结构爆炸试验、倒塌事故和砌体墙爆炸试验进行了充分验证;开展了典型3层原型RC框架结构在不同爆炸当量(25~200 kg TNT)下的内爆炸数值仿真,定量分析了爆炸冲击波在建筑结构内部的传播、结构损伤破坏和墙体飞散等。爆炸作用下建筑结构的高效毁伤评估流程为:结合镜像爆源和非线性叠加原理确定内爆炸荷载,基于等效单自由度方法评估梁、板、柱及墙体构件的毁伤等级,引入构件重要性系数加权确定房间毁伤等级,考虑房间功能及位置重要性评估整体结构的毁伤等级。高精度数值仿真分析与毁伤评估方法计算的典型RC框架结构的整体毁伤等级一致,即在25、100和200 kg TNT爆炸下RC结构分别呈现轻度、中度和重度毁伤,毁伤评估方法可缩短99%以上的计算耗时,兼具可靠性与时效性。
  • 图  1  建筑结构混合单元建模方法

    Figure  1.  Hybrid modeling approach of building structures

    图  2  砌体墙简化微观建模方法

    Figure  2.  Simplified micro-model for masonry walls

    图  3  1/4缩尺2层RC框架爆炸试验及其数值仿真结果

    Figure  3.  Explosion test of 1/4-scale 2-story RC frame and its simulation results

    图  4  Murrah联邦大楼爆炸倒塌事故的数值模拟

    Figure  4.  Numerical simulation of blast-induced collapse incident of Murrah Federal Building

    图  5  砌体墙野外爆炸试验及其数值仿真结果

    Figure  5.  Field explosion test of masonry walls and its simulation results

    图  6  砌体墙激波管爆炸试验及其数值仿真结果

    Figure  6.  Shock tube test of masonry walls and its simulation results

    图  7  典型3层含填充墙RC框架结构

    Figure  7.  Typical 3-story masonry-infilled RC frame structure

    图  8  100 kg TNT爆炸工况下冲击波的传播过程以及框架结构的损伤演化过程

    Figure  8.  Propagation of blast waves and damage evolution of RC frame structure under explosion of 100 kg TNT

    图  9  爆炸后RC框架结构的最终损伤云图

    Figure  9.  Post-blast damage contours of RC frame structures

    图  10  镜像爆源分布及冲击波传播

    Figure  10.  Distribution of mirror explosion sources and blast wave propagation

    图  11  密闭结构内爆炸试验中壁面测点的反射超压时程曲线

    Figure  11.  Reflected overpressure-time histories on side walls in internal explosion test of closed structure

    图  12  毁伤评估流程

    Figure  12.  Structural damage assessment procedure

    图  13  RC框架结构内各房间的毁伤系数

    Figure  13.  Damage factors of each room in RC frame structure

    图  14  RC框架结构内各房间的毁伤等级

    Figure  14.  Damage degree of each room in RC frame structures

    表  1  建筑构件毁伤等级判据[22, 30]

    Table  1.   Damage criterion of structural members[22, 30]

    构件类型轻度毁伤判据中度毁伤判据重度毁伤判据
    0<xmax/L≤0.0170.017<xmax/L≤0.053xmax/L>0.053
    0<xmax/L≤0.0170.017<xmax/L≤0.053xmax/L>0.053
    0<xmax/L≤0.0090.009<xmax/L≤0.026xmax/L>0.026
    0<xmax/L≤0.0040.004<xmax/L≤0.009xmax/L>0.009
    下载: 导出CSV

    表  2  RC梁跨中最大挠度的试验[13]与计算结果对比

    Table  2.   Comparison between test[13] and calculated maximum deflection at mid-span of RC beams

    工况 装药量/kg 比例距离/(m·kg−1/3) 跨中最大挠度
    试验[13]/mm 计算/mm 误差/%
    B2-1 0.51 0.44 35 32.03 −8.49
    B2-2 0.45 0.50 25 24.19 −3.24
    B2-3 0.36 0.57 9 7.13 −20.80
    B2-4 0.75 0.40 40 44.96 12.40
    下载: 导出CSV

    表  3  砌体墙跨中最大挠度的试验[41]和计算结果对比

    Table  3.   Comparison between test[41] and calculated maximum deflection at mid-span of masonry walls

    工况 装药量/kg 比例距离/(m·kg−1/3) 跨中最大挠度
    试验[41]/mm 计算/mm 误差/%
    W-1 100 3.45 56.6 55.6 1.8
    W-2 150 3.02 79.5 79.2 0.4
    W-3 250 2.54 118.0 114.0 3.4
    下载: 导出CSV

    表  4  构件的重要性系数

    Table  4.   Importance factor of structural members

    构件类型ηR0ηR
    1内部框架梁0.5
    边跨框架梁1
    2内部楼板1
    屋面板2
    2中柱0.5
    边柱1
    角柱2
    填充墙1内部填充墙0.5
    外部填充墙1
    下载: 导出CSV

    表  5  房间的使用功能重要性系数

    Table  5.   Importance factor for usage of rooms

    功能重要性 重要性描述 η1
    重要 房间用于作战指挥或通信,重要人员或设备常驻 2.0
    常规 房间用于常规办公或住宿,一般人员或设备常驻 1.0
    次要 房间用于辅助或临时办公 0.5
    下载: 导出CSV

    表  6  25 kg TNT爆炸作用下RC框架结构内2层中心房间的毁伤等级评估

    Table  6.   Damage degree assessment of central room at the 2nd floor of RC frame structure under explosion of 25 kg TNT

    结构构件 pr,max/MPa te/ms xmax/L 构件毁伤等级 d ηR dηR
    柱C1 3.4 4.2 0.0013 轻度 0.3 0.5 0.15
    柱C2 3.4 4.2 0.0013 轻度 0.3 0.5 0.15
    柱C3 3.4 4.2 0.0013 轻度 0.3 0.5 0.15
    柱C4 3.4 4.2 0.0013 轻度 0.3 0.5 0.15
    梁B1 10.0 1.7 0.0092 轻度 0.3 0.5 0.15
    梁B2 10.0 1.7 0.0092 轻度 0.3 0.5 0.15
    梁B3 4.5 4.2 0.0055 轻度 0.3 0.5 0.15
    梁B4 4.5 4.2 0.0055 轻度 0.3 0.5 0.15
    顶板 32.8 1.0 5.6 重度 1.0 1.0 1.00
    底板 32.8 1.0 5.6 重度 1.0 1.0 1.00
    墙W1 17.2 1.3 不收敛 重度 1.0 0.5 0.50
    墙W2 17.2 1.3 不收敛 重度 1.0 0.5 0.50
    墙W3 4.7 4.2 不收敛 重度 1.0 0.5 0.50
    墙W4 4.7 4.2 不收敛 重度 1.0 0.5 0.50
    总计 Dr=5.20/8.0=0.65(重度) 8.0 5.20
    下载: 导出CSV

    表  7  毁伤评估方法和高精度数值仿真分析方法的对比

    Table  7.   Comparison between damage assessment method and high-fidelity numerical simulation approach

    爆炸工况 整体结构的毁伤等级 用时
    仿真分析 毁伤评估方法 仿真分析/d 毁伤评估方法/h
    25 kg TNT中心房间爆炸 轻度毁伤 轻度毁伤 7 0.4
    100 kg TNT中心房间爆炸 中度毁伤 中度毁伤 9 0.6
    200 kg TNT中心房间爆炸 重度毁伤 重度毁伤 10 0.7
    下载: 导出CSV
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出版历程
  • 收稿日期:  2024-02-26
  • 修回日期:  2024-05-09
  • 网络出版日期:  2024-05-11
  • 刊出日期:  2025-01-01

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