Abstract: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.
