小药量双重爆炸荷载作用下钢筋混凝土板动力响应研究  

Study on dynamic response of RC slabs under double blast loading with small explosive charge

作　　者：张艳玲 董斌 王新宇 王俊 Zhang Yan-ling;Dong Bin;Wang Xin-yu;Wang Jun(Hebei Construction Engineering Quality Inspection Center Co.Ltd,Shijiazhuang 050227,China;Henan Provincial Communications Planning&Design Institute Co.Ltd,Zhengzhou 450000,China;School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454000,China;Hebei Shuangcheng Construction Engineering Testing Co.Ltd,Shijiazhuang 050051,China)

机构地区：[1]河北省建筑工程质量检测中心有限公司,河北石家庄050227 [2]河南省交通规划设计研究院股份有限公司,河南郑州450000 [3]河南理工大学土木工程学院,河南焦作454000 [4]河北双诚建筑工程检测有限公司,河北石家庄050051

出　　处：《工程抗震与加固改造》2024年第5期44-52,共9页Earthquake Resistant Engineering and Retrofitting

基　　金：河北省重大科技成果转化专项(22284504Z)。

摘　　要：为研究小药量双重爆炸荷载作用下钢筋混凝土板的动力响应,采用有限元软件LS-DYNA建立了钢筋混凝土板的三维有限元模型。通过与既有试验数据对比,验证了数值模型的合理性;并采用所建数值模型,进一步研究了小药量双重爆炸荷载作用下钢筋混凝土板的动力行为特征。结果表明,随着条形炸药放置角度的不同,混凝土板面的损伤破坏区域呈现出始终沿条形炸药长度方向上分布的规律。小药量双重爆炸荷载作用下,钢筋混凝土板的损伤破坏主要发生在第一次爆炸期间;钢筋混凝土板位移、钢筋轴力和轴向应变在第二次爆炸荷载作用下的增长显著。To study dynamic response of the reinforced concrete(RC)slabs,three-dimensional finite element(FE)model of the RC slabs under double blast loading with small explosive charge is established in this paper.Accuracy of the FE model is validated by an experiment.Using the FE model,further studies on the accumulated damage of the RC slabs under double blast loading with small explosive charge are presented.The results show that with the different placement angles of the explosive,the damage zone of the concrete slab surface is always distributed along the length direction of the explosive.Under double blast loading with small explosive charge,damage of the RC slab mainly appears in the first blast cycle.Displacement of the RC slab,axial force and strain of the rebars of slabs increase remarkably in second blast cycle.

关 键 词：小药量 双重爆炸荷载 钢筋混凝土板 动力响应 数值模型 损伤破坏 

分 类 号：TU375.2[建筑科学—结构工程]