论文部分内容阅读
地铁车站内部爆炸及产生的爆炸冲击波将在结构周围的土体中产生巨大的应力波,并向外传播,进而引起地铁车站周边地面的强烈震动,对地面建筑结构造成危害。该文以天津某典型地铁车站为例,对车站内发生意外爆炸后,应力波在周围土体内的传播过程,引起的周边地面震动的特性及其衰减规律进行了数值分析;同时针对国内典型地铁车站,研究了车站埋深、炸药量等参数对地铁车站周边地面震动的影响规律,进而提出了考虑车站埋深和比例距离变化的地铁车站周边地面典型位置的地面震动主要参数的计算公式。该文的研究成果可用于评估恐怖爆炸情况下地铁车站周边建筑的抗震安全性,也可为地铁车站抗爆设计中车站埋深的选取提供理论依据。
Explosion and explosion shock waves generated inside the subway station will generate huge stress waves in the soil around the structure and spread outwards, causing strong vibration of the ground around the metro station, which will endanger the ground building structure. Taking a typical subway station in Tianjin as an example, the numerical analysis of the characteristics of the ground vibration caused by the propagation of stress waves in the surrounding soil and its attenuation after an accidental explosion occurred in the station was carried out. At the same time, This paper studies the influence of parameters such as the depth of the station and the amount of dynamite on the ground vibration near the metro station, and then proposes the calculation formula of the main parameters of ground vibration in the typical position around the metro station considering the change of the station depth and the proportional distance. The research results of this paper can be used to evaluate the seismic safety of the buildings around the subway station in the case of terrorist explosion and to provide a theoretical basis for the selection of station depth in anti-explosion design of subway stations.