Damage analysis of continuous girder bridge piers based on vibratory mixing steel fiber concrete
ZHANG Jinpeng
XU Yiming
XU Jianguo
LI Zisheng
GUO Yihang
LIU Shiyu
WU Yanni
Abstract：The study investigated the effects of vibratory mixing on the mechanical and fatigue properties of steel fiber concrete.Further analysis of the influencing mechanisms was conducted through numerical simulation.A three-dimensional finite element model of a continuous girder bridge was established using ABAQUS to study the damage conditions of bridge piers made of steel fiber concrete with two different mixing methods under seismic and vehicular loads.The results indicated that using vibratory mixing can enhance the compressive,tensile strength,and elastic modulus of steel fiber concrete.When the steel fiber content is the same,steel fiber concrete mixed with vibratory mixing exhibits fewer and narrower surface cracks after compressive and tensile strength failure tests.Additionally,the distribution of Mises stress in the concrete matrix is more uniform,and more steel fibers bear higher Mises stress.Bridge piers made of steel fiber concrete with vibratory mixing show a smaller range and peak value of compressive damage under vehicular and seismic loads compared to those mixed with conventional methods.
Keywords：vibratory mixingsteel fiber concretefatigue testdamage analysiscontinuous girder bridge pier
Publication Date：2024-12-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 60-66 )