基于仿真分析的预制拼装综合管廊抗燃爆研究

综合管廊凭借其自身优点正广泛应用于城市建设中,采用Ansys/Ls-dyna基于仿真分析综合管廊发生燃气爆炸具有十分重要的实际意义.以预制拼装综合管廊为研究对象,采用流固耦合的计算方法,建立预制拼装综合管廊、可燃爆气体和空气等三部分的有限元仿真模型.通过分析预制拼装综合管廊内混凝土的应力时程曲线、主要节点位移时程曲线及...

Research on Fire and Explosion Resistance of Prefabricated Utility Tunnel Based on Simulation Analysis

Utility tunnel is being widely used in urban construction by virtue of its own advantages. It is of great practical significance to adopt Ansys/Ls-dyna to analyze the gas explosion in utility tunnel based on simulation. Taking a prefabricated utility tunnel as the research object, the finite element simulation model of prefabricated utility tunnel, combustible explosive gas and air is established by using the fluid-solid coupling calculation method. By analyzing the stress time-history curve of the prefabricated utility tunnel concrete, the displacement time-history curve of the main node and the axial stress time-history curve of the prestressed reinforcement, the anti-fire and explosion performance of the prefabricated utility tunnel under the action of gas explosion is analyzed, and the anti-fire and explosion protection and design suggestions are put forward.