近爆荷载作用下装配式钢筋混凝土柱抗爆性能及受损加固试验研究

吕辰旭 闫秋实 李亮

吕辰旭, 闫秋实, 李亮. 近爆荷载作用下装配式钢筋混凝土柱抗爆性能及受损加固试验研究[J]. 爆炸与冲击, 2023, 43(6): 063301. doi: 10.11883/bzycj-2022-0225
引用本文: 吕辰旭, 闫秋实, 李亮. 近爆荷载作用下装配式钢筋混凝土柱抗爆性能及受损加固试验研究[J]. 爆炸与冲击, 2023, 43(6): 063301. doi: 10.11883/bzycj-2022-0225
LYU Chenxu, YAN Qiushi, LI Liang. Experimental study on blast resistance performance and damage repair of precast concrete column under close-in explosion[J]. Explosion And Shock Waves, 2023, 43(6): 063301. doi: 10.11883/bzycj-2022-0225
Citation: LYU Chenxu, YAN Qiushi, LI Liang. Experimental study on blast resistance performance and damage repair of precast concrete column under close-in explosion[J]. Explosion And Shock Waves, 2023, 43(6): 063301. doi: 10.11883/bzycj-2022-0225

近爆荷载作用下装配式钢筋混凝土柱抗爆性能及受损加固试验研究

doi: 10.11883/bzycj-2022-0225
基金项目: 国家自然科学基金(52178445)
详细信息
    作者简介:

    吕辰旭(1996- ),男,博士研究生, chenxulv@qq.com

    通讯作者:

    闫秋实(1983- ),男,博士,教授, yqs2011@bjut.edu.cn

  • 中图分类号: O383.2;TU375.3

Experimental study on blast resistance performance and damage repair of precast concrete column under close-in explosion

  • 摘要: 为研究近爆荷载作用下装配式钢筋混凝土(precast concrete,PC)柱的抗爆性能与受损后的加固修复性能,开展了足尺PC柱化爆试验与受损柱加固修复轴压试验研究。共开展了3次化爆试验,获得了PC柱的动力响应与损伤破坏试验数据,分析了PC柱与现浇钢筋混凝土(reinforced concrete, RC)柱试验结果的差异。近爆荷载作用下,PC柱呈现出局部损伤破坏模式,爆心附近混凝土剥落,出现斜裂缝,装配位置的交界面出现贯穿裂缝,锚浆搭接PC柱比灌浆套筒PC柱的损伤更加严重。两种装配形式的PC柱整体上具有与RC柱相近的抗爆性能,但装配界面削弱了PC柱的整体性与抗剪切能力,是PC柱典型的薄弱位置。轴压试验结果表明,分别采用置换混凝土和置换后外包碳纤维增强复合材料(carbon fiber reinforcement polymer, CFRP)布的方式加固受损的两根PC柱,其轴向承载力均超过了同规格未受损柱的试验承载力和设计承载力。
  • 图  1  试件配筋设计

    Figure  1.  Reinforcement for specimen

    图  2  试件构造(单位:mm)

    Figure  2.  Constructions for specimens (unit: mm)

    图  3  装配连接构造

    Figure  3.  Precast connection constructions

    图  4  试件加工

    Figure  4.  Specimen processing

    图  5  试验布置

    Figure  5.  Test arrangement

    图  6  试验用TNT炸药(单位:mm)

    Figure  6.  TNT charges used in test (unit: mm)

    图  7  千斤顶施加初始轴压

    Figure  7.  Lifting axial load with a hydraulic jack

    图  8  测点布置(单位:mm)

    Figure  8.  Layout of measuring points (unit: mm)

    图  9  试件P-1的损伤破坏情况

    Figure  9.  Blast-induced damage of specimen P-1

    图  10  试件P-1的损伤细节(单位:mm)

    Figure  10.  Damage characteristics of specimen P-1 (unit: mm)

    图  11  试件P-1的装配交界面的裂缝

    Figure  11.  Crack development at the bottom of specimen P-1

    图  12  试件P-2的损伤破坏情况

    Figure  12.  Blast-induced damage of specimen P-2

    图  13  试件P-2的损伤细节(单位:mm)

    Figure  13.  Damage characteristics of specimen P-2 (unit: mm)

    图  14  试件P-2的核心区裂缝

    Figure  14.  Core area cracks of specimen P-2

    图  15  表面损伤尺寸示意图

    Figure  15.  Schematic diagram of surface damage

    图  16  PC柱的损伤尺寸

    Figure  16.  Damage size of PC columns

    图  17  试件P-1柱的位移响应曲线

    Figure  17.  Displacement response curve of specimen P-1

    图  18  试件P-2柱的位移响应曲线

    Figure  18.  Displacement response curve of specimen P-2

    图  19  试件R-1的损伤破坏

    Figure  19.  Blast-induced damage of specimen R-1

    图  20  试件R-1的损伤细节(单位:mm)

    Figure  20.  Damage characteristics of specimen R-1 (unit: mm)

    图  21  试件R-1的底端裂缝

    Figure  21.  Cracks at the bottom of specimen R-1

    图  22  PC柱与RC柱的损伤破坏对比

    Figure  22.  Damage comparison between PC column and RC column

    图  23  测点S2的位移响应对比

    Figure  23.  Displacement response comparison of measure point S2

    图  24  测点S3的位移响应对比

    Figure  24.  Displacement response comparison of measure point S3

    图  25  受损试件的加固修复过程

    Figure  25.  Reinforcement and repair of damaged specimens

    图  26  7200 t压力试验机

    Figure  26.  7200 t pressure testing machine

    图  27  竖向位移传感计

    Figure  27.  Vertical displacement transducer

    图  28  试件柱的轴压破坏形态

    Figure  28.  Axial compressive failure patterns of columns

    图  29  试件荷载-位移曲线

    Figure  29.  Load-displacement curves of columns

    表  1  试验构件主要参数

    Table  1.   Parameters of specimen

    试件装配形式混凝土强度等级钢筋伸出长度/mm
    P-1套筒连接C40180
    P-2锚浆搭接C40724
    下载: 导出CSV

    表  2  PC柱与RC柱的损伤尺寸差值比例

    Table  2.   Proportion of damage size between PC column and RC column

    试件迎爆面侧面1侧面2背爆面
    P-1−17.1%−6.3% 3.8% 3.8%
    P-2 −4.3% 6.3%11.3%11.3%
    下载: 导出CSV

    表  3  响应峰值与残余位移

    Table  3.   Peak and residual displacement

    试件响应峰值/mm 残余位移/mm
    S2S3S2S3
    P-14231107.0
    P-24634127.0
    R-14334108.2
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-05-25
  • 修回日期:  2023-01-18
  • 网络出版日期:  2023-02-21
  • 刊出日期:  2023-06-05

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