摘要
基于复合钢板抗拉伸、剪切强度高的特点,提出了一种使用复合钢板衬砌结构的地铁抗爆防护方法。结合南京地铁工程实例,使用有限元软件LS-DYNA建立了空气-炸药-复合钢板衬砌结构-周围土体的爆炸冲击模型,分别研究了在10 kg TNT和30 kg TNT炸药当量下,爆炸冲击波在安装复合钢板的地铁隧道区间内的传播规律。结果表明:爆炸冲击波在传播过程中会出现强烈的反射叠加作用。在安装有复合钢板的情况下,隧道区间内的超压峰值呈现出小幅度增大的趋势;衬砌结构各测点的压力值在经历峰值后逐渐减小并处于稳定状态,符合爆炸冲击波的衰减规律;复合钢板对爆炸冲击波在空气中的压力变化规律影响较小,爆源中心截面位置处受到的破坏作用最大。
Based on the characteristics of high tensile and shear strength of composite steel plate, an anti-explosion protection method of subway using composite steel plate lining structure was proposed. Combined with the example of Nanjing subway project, the finite element software LS-DYNA was used to establish the explosion impact model of air-explosive-composite steel plate lining structure-surrounding soil. The propagation law of the explosion shock wave in the subway tunnel area where the composite steel plate was installed was studied under the explosive equivalent of 10 kg TNT and 30 kg TNT respectively. The results show that the explosion shock wave will have strong reflection and superposition in the process of propagation. When the clad steel plate was installed, the overpressure peak value in the tunnel section showed a small increase trend. The pressure value of each measuring point of the lining structure gradually decreased after experiencing the peak value and was in a stable state, which conformed to the attenuation law of the explosion shock wave. The composite steel plate has little influence on the pressure change law of the blast shock wave in the air, and the central section of the blast source suffers the greatest damage.
作者
赵越
刘晓
李庆洲
赵明凯
宋城
Zhao Yue;Liu Xiao;Li Qingzhou;Zhao Mingkai;Song Cheng(Lanling County Public Housing Management Co.,Ltd.,Lanling 277700,China;Civil Aviation Airport Intelligent Construction and Industrialization Engineering Technology Research Center,Tianjin 300456,China;Airport Construction Engineering Co.,Ltd.,Tianjin 300456,China;College of Civil Engineering and Architecture,Shandong University of Science and Technology,Qingdao 266590,China)
出处
《山西建筑》
2023年第5期158-162,共5页
Shanxi Architecture
基金
民航机场建设工程有限公司科技项目(20211001)。
关键词
爆炸波
复合钢板
地铁隧道
反射叠加
传播规律
blast wave
composite steel plate
subway tunnel
reflection superposition
propagation law
