(1.西安ope电子竞技研究院，陕西 西安710065；2.陕西省高速ope电子竞技建设集团公司，陕西 西安710061)
Early Damage Analysis and Optimization & Improvement Study
on Expansion Joints of Highway Bridge
DING Chu-zhi1,GAO Xiao-hua2,ZHANG Lei2,ZHANG Ya-jun1
（1.Xi’an Highway Research Institute, Xi’an 710065, China;
2. Shaanxi Province Highway Construction Group, Xi’an 710061, China）
Abstract: The damage characteristics of highway bridge expansion joints were analyzed systematically, and causes were analyzed from different aspects such as design, construction, management and maintenance. The optimization and improvement measures were put forward from two aspects, expansion joint structure and material application, and good results were obtained in guiding the engineering practice. It has practical significance and engineering application value.
key words: highway bridge；expansion joint；early damage；self-stretching device；high-performance concrete