聚脲加固配筋砌体墙抗燃气爆炸动态响应的数值模拟分析

柳锦春 王钰颖 孙妮

柳锦春, 王钰颖, 孙妮. 聚脲加固配筋砌体墙抗燃气爆炸动态响应的数值模拟分析[J]. 爆炸与冲击. doi: 10.11883/bzycj-2024-0077
引用本文: 柳锦春, 王钰颖, 孙妮. 聚脲加固配筋砌体墙抗燃气爆炸动态响应的数值模拟分析[J]. 爆炸与冲击. doi: 10.11883/bzycj-2024-0077
LIU Jinchun, WANG Yuying, SUN Ni. Numerical simulation of dynamic response of reinforced masonry wall strengthened with polyurea under gas explosion[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0077
Citation: LIU Jinchun, WANG Yuying, SUN Ni. Numerical simulation of dynamic response of reinforced masonry wall strengthened with polyurea under gas explosion[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0077

聚脲加固配筋砌体墙抗燃气爆炸动态响应的数值模拟分析

doi: 10.11883/bzycj-2024-0077
详细信息
    作者简介:

    柳锦春(1973- ),男,博士,教授,weise@163.com

  • 中图分类号: O383.2; TU362

Numerical simulation of dynamic response of reinforced masonry wall strengthened with polyurea under gas explosion

  • 摘要: 为研究燃气爆炸作用下配筋砌体墙的抗爆能力及聚脲对墙体的加固性能,采用LS-DYNA软件,对无配筋砌体墙、配筋砌体墙、聚脲加固无筋砌体墙、聚脲加固配筋砌体墙的抗燃气爆炸性能进行数值模拟,得到了不同墙体在峰值为5、10、20、30 kPa的燃气爆炸荷载作用下的动态响应,并对灰缝竖向配筋增强效果和聚脲加固效果进行了对比分析。结果表明:(1)无筋墙体抗燃气爆炸能力较弱,一般在20 kPa荷载作用下发生不可修复破坏,在30 kPa荷载作用下发生倒塌破坏。(2)在砌体墙灰缝中,竖向配置钢筋和在墙体表面喷涂聚脲均可增强砌体墙的抗爆能力。在20 kPa荷载作用下,各加固墙体跨中峰值位移均较无筋墙体的减小,破坏均较轻,均可修复,其中双面喷涂聚脲加固无筋墙体的抗爆效果最好,其在30 kPa荷载作用下也未发生倒塌破坏,配筋加强和背爆面喷涂聚脲加固的次之。(3)三组聚脲加固配筋墙体均可承受30 kPa燃气爆炸荷载的作用,迎爆面喷涂加固的墙体中间发生开裂,有碎块飞溅,跨中峰值位移最大,背爆面以及双面喷涂加固的墙体两端出现局部破坏,两者墙体基本完整,且双面喷涂的墙体跨中峰值位移最小,说明在灰缝竖向配筋的基础上再双面喷涂聚脲,抗爆加固效果最优,还可以承受更大的燃气爆炸荷载。
  • 图  1  典型压力波形与理想三角形爆炸荷载[11]

    Figure  1.  Typical pressure waveform and ideal triangular explosion loads[11]

    图  2  燃气爆炸荷载曲线[12]

    Figure  2.  Gas explosion load curve[12]

    图  3  5~30 kPa燃气爆炸荷载曲线

    Figure  3.  5-30 kPa gas explosion load curves

    图  4  砌体墙几何模型

    Figure  4.  Geometric model of masonry wall

    图  5  网格划分细节

    Figure  5.  Details of mesh division

    图  6  试验与模拟的位移时程曲线对比

    Figure  6.  Comparison of displacement curves between test and simulation

    图  7  墙体DWW跨中位移时程曲线

    Figure  7.  Midspan displacement curve of wall DWW

    图  8  墙体DWW破坏形态

    Figure  8.  Failure mode of wall DWW

    图  9  1/2墙体横截面钢筋分布

    Figure  9.  Reinforcement distribution of half wall cross section

    图  10  墙体DPW4跨中位移时程曲线

    Figure  10.  Midspan displacement curve of wall DPW4

    图  11  墙体DPW5跨中位移时程曲线

    Figure  11.  Midspan displacement curve of wall DPW5

    图  12  墙体DPW4破坏形态

    Figure  12.  Failure mode of wall DPW4

    图  13  墙体DPW5破坏形态

    Figure  13.  Failure mode of wall DPW5

    图  14  聚脲加固无筋墙体示例

    Figure  14.  Example of masonry wall strengthened with polyurea

    图  15  准静态有效应力-有效塑性应变关系

    Figure  15.  Relationship between quasi-static effective stress and effective plastic strain

    图  16  屈服应力缩放因子随应变率的变化关系[24]

    Figure  16.  Relationship between yield stress scaling factor and strain rate[24]

    图  17  墙体DWJY跨中位移时程曲线

    Figure  17.  Midspan displacement curves of wall DWJY

    图  18  墙体DWJB跨中位移时程曲线

    Figure  18.  Midspan displacement curves of wall DWJB

    图  19  墙体DWJS跨中位移时程曲线

    Figure  19.  Midspan displacement curves of wall DWJS

    图  20  墙体DWJY破坏形态

    Figure  20.  Failure mode of wall DWJY

    图  21  墙体DWJB破坏形态

    Figure  21.  Failure mode of wall DWJB

    图  22  墙体DWJS破坏形态

    Figure  22.  Failure mode of wall DWJS

    图  23  墙体DPJY跨中位移时程曲线.

    Figure  23.  Midspan displacement curves of wall DPJY

    图  24  墙体DPJB跨中位移时程曲线

    Figure  24.  Midspan displacement curves of wall DPJB

    图  25  墙体DPJS跨中位移时程曲线

    Figure  25.  Midspan displacement curves of wall DPJS

    图  26  墙体DPJY破坏形态

    Figure  26.  Failure mode of wall DWJY

    图  27  墙体DPJB破坏形态

    Figure  27.  Failure mode of wall DWJB

    图  28  墙体DPJS破坏形态

    Figure  28.  Failure mode of wall DWJS

    表  1  DWW墙体材料参数

    Table  1.   Material parameters of wall DWW

    材料ρ/(kg·m−3)E/MPaμσb/MPaστ/MPaσs/MPaKIC/(N·m−1)τη
    砌块11503800.151.000.509.01200.037.16×105
    砂浆210046440.251.760.9017.61400.037.16×105
    下载: 导出CSV

    表  2  DWW墙体动态响应及损伤程度表

    Table  2.   Dynamic response and damage degree of wall DWW

    p/kPa Dmax/mm σb,max/MPa σs,max/MPa θ/(°)
    5 1.99 1.76 3.01 0.1
    10 4.25 1.76 6.27 0.2
    20 24.80 13.40 20.10 1.0
    30 倒塌 10.60 20.20 >13.8
    下载: 导出CSV

    表  3  钢筋材料参数

    Table  3.   Reinforcement material parameters

    材料ρs/(kg·m−3)Es/MPaμsσy/MPaEt/MPaHpcnεf
    钢筋78002×1050.330072314050.1
    下载: 导出CSV

    表  4  DPW墙体动态响应及损伤程度表

    Table  4.   Dynamic response and damage degree of wall DPW

    p/kPa Dmax/mm σb,max/MPa σs,max/MPa σr,max/MPa θ/(°)
    DPW4 DPW5 DPW4 DPW5 DPW4 DPW5 DPW4 DPW5 DPW4 DPW5
    5 1.99 1.99 1.75 1.75 3.01 3.01 6.24 8.07 0.1 0.1
    10 4.25 4.24 1.76 1.76 6.21 6.21 35.60 32.00 0.2 0.2
    20 21.20 20.70 16.80 15.80 19.90 20.80 410.00 274.00 0.8 0.8
    30 倒塌 倒塌 16.00 17.50 24.70 23.20 549.00 503.00 >6.8 >6.9
    下载: 导出CSV

    表  5  聚脲材料参数

    Table  5.   Polyurea material parameters

    材料 ρj/(kg·m−3) Ej/MPa μj εm N
    聚脲 1000 212 0.4 0.5 2
    下载: 导出CSV

    表  6  DWJ墙体动态响应及损伤程度表

    Table  6.   Dynamic response and damage degree of wall DWJ

    p/
    kPa
    Dmax/mm σb,max/MPa σs,max/MPa σp,max/MPa θ/(°)
    DWJY DWJB DWJS DWJY DWJB DWJS DWJY DWJB DWJS DWJY DWJB DWJS DWJY DWJB DWJS
    5 1.94 1.94 1.89 1.75 1.75 1.76 2.94 2.92 2.87 0.437 0.149 0.430 0.1 0.1 0.1
    10 4.14 4.15 4.05 1.76 1.75 1.76 6.10 6.07 5.93 0.695 0.468 0.693 0.2 0.2 0.2
    20 18.00 21.40 15.70 8.22 7.70 9.41 19.50 19.00 19.00 9.680 11.500 10.000 0.7 0.8 0.6
    30 倒塌 倒塌 67.60 10.00 9.66 17.80 19.20 19.70 19.60 11.300 18.00 12.500 >7.3 >6.4 2.6
    下载: 导出CSV

    表  8  DPJB墙体动态响应及损伤程度

    Table  8.   Dynamic response and damage of wall DPJB

    p/kPa Dmax/mm σb,max/MPa σs,max/MPa σr,max/MPa σp,max/MPa θ/(°)
    5 1.94 1.75 2.93 8.4 0.151 0.1
    10 4.14 1.76 6.06 31.5 0.467 0.2
    20 18.7.0 13.50 19.80 322.0 7.810 0.7
    30 106.00 18.80 20.60 522.0 10.000 4.1
    下载: 导出CSV

    表  7  DPJY墙体动态响应及损伤程度

    Table  7.   Dynamic response and damage of wall DPJY

    p/kPa Dmax/mm σb,max/MPa σs,max/MPa σr,max/MPa σp,max/MPa θ/(°)
    5 1.94 1.75 2.95 7.22 0.437 0.1
    10 4.14 1.76 6.08 28.90 0.330 0.2
    20 14.30 15.80 19.70 423.00 9.920 0.5
    30 128.00 19.00 22.80 492.00 10.100 4.9
    下载: 导出CSV

    表  9  DPJS墙体动态响应及损伤程度

    Table  9.   Dynamic response and damage of wall DPJS

    p/kPa Dmax/mm σb,max/MPa σs,max/MPa σr,max/MPa σp,max/MPa θ/(°)
    5 1.89 1.75 2.87 7.65 0.430 0.1
    10 4.04 1.76 5.91 30.60 0.687 0.2
    20 13.30 14.00 19.20 289.00 9.790 0.5
    30 53.80 17.40 20.70 474.00 11.500 2.1
    下载: 导出CSV
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  • 收稿日期:  2023-12-26
  • 修回日期:  2024-05-12
  • 网络出版日期:  2024-05-14

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