Abstract:Analyzing the reflectiveSoverpressure of bridge pier under theSimpactSofSexplosion is the basis for studying its dynamic response. ANSYS/LS-DYNA was used to establish the three-dimensional solid separation model of the precast segmental piers under theSimpactSofSexplosion, and the reliability of the modeling method was verified by tests. Taking the structural form of the pier, the number of sections, the explosion proportional distance and the height of the detonation center as design variables, the influence of these variables on the distribution of the reflected overpressure of precastSsegmentalSpiers were analyzed. The results show that the reflected overpressure increases with the decrease of proportional distance when the number of segments and the detonation height of the piers are constant. When the explosion height is close to the joints of the piers, considerable reflection overpressure will be generated at the joints; When Z<0.553 m/kg1/3, compared with the integral pier, the smaller the proportional distance is, the greater the reflectiveSoverpressure is. By fitting, the calculation formula of the peak value of reflectiveSoverpressure distributed along the height of pier at different proportional distances of integral and segmental piers is obtained, which can provide reference for studying the dynamic response and anti-explosion design of the pier.
