Dynamic response of concrete continuous box girder bridge deck pavement layer under coupled action of low temperature and dynamic load
LI Xiongao
WANG Kun
XIE Dandan
SUN Xingchen
JIANG Ziyu
LI Hongzhen
FENG Zhuangzhuang
Abstract：To address the common issues of cracking,bulging,and delamination in the pavement layer of concrete continuous box girder bridges,the stress and displacement distribution of the pavement layer under low temperature and dynamic load coupling effects are investigated.A concrete continuous box girder bridge model is established using the finite element software COMSOL to analyze the dynamic mechanical response of the pavement layer under low temperature conditions and the coupling effects of low temperature and dynamic loads.The results indicate that under low temperature conditions,the maximum displacement at the top of the pavement layer reaches 28.75 mm,with an average principal stress of 0.79 MPa.Under the coupling effects of low temperature and dynamic loads,the pavement layer primarily experiences tensile stress,with the tensile stress in the upper layer being greater than that in the lower layer.The tensile stress in the pavement layer increases from the center of the load towards the edges,and the maximum displacement of the pavement layer increases with the increase of the load.
Keywords：concrete bridgebridge decktemperature-load couplingmechanical response
Publication Date：2025-03-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：8( 102-109 )