中文摘要：

该文利用LS-DYNA软件，采用ALE方法，对城市复杂环境中爆炸波的传播规律与超压荷载进行了数值模拟和分析。通过对两建筑物模型中爆炸波传播的数值模拟及其与单建筑物模型的对比分析，结果表明两建筑物模型中爆炸波由于在两建筑物之间多次反射而被增强，因此在计算建筑物所受到的爆炸波超压荷载时必须考虑相邻建筑物的影响。通过对一典型T型街道中爆炸波传播的数值模拟及其与简单环境的对比分析，结果表明在城市街道中爆炸波受到地面和周边建筑物的多次反射而增强，且在一定高宽比范围内，街道越窄、周边建筑物越高，爆炸波超压荷载的增大系数越大，因此在分析城市复杂环境中爆炸波的传播规律和超压荷载时必须考虑周边建筑物的影响。从而为制定城市大型及重要建筑的防爆措施提供依据。

英文摘要：

Propagation law and overpressure load of blast wave in urban complex environment are simulated and analyzed using LS-DYNA3D software and the ALE method. Numerical simulations of blast wave propagation both in a double-building model and a single-building model are carried out. A comparison of numerical results showed that the blast wave in the double-building model might be amplified due to multiple reflections between the two buildings during blast wave propagation. Therefore, the influence of adjacent buildings must be considered when calculating the overpressure load of blast wave on the building in urban complex environment. Blast wave propagation in a typical T-type street is also simulated and the results are compared with that in the simple environment, i.e., without any buildings in the street. It is shown that the blast wave in an urban street might be strengthened due to multiple reflection by ground and surrounding buildings. When the ratio of the height of surrounding buildings to the street wide is in certain range, the amplification factor of the overpressure load will increase as the street is becoming narrower and the surrounding buildings are higher. As a result, the influence of the surrounding buildings must be considered when investigating the propagation law and blast wave overpressure load in the urban complex environment. This study provides a reference for working out blast prevention measures for large and important buildings in urban.