锈蚀钢筋混凝土公路桥梁疲劳性能研究综述

Review of fatigue behavior of corroded reinforced concrete highway bridges

我国现行混凝土桥梁设计规范中缺乏疲劳设计的相关内容,滞后于国外同类规范;另外,我国混凝土桥梁占比较高,随着交通荷载的攀升以及桥梁结构性能的退化,在役混凝土桥梁结构的疲劳性能开始受到普遍关注。基于上述背景,本文综述了公路桥梁结构疲劳荷载及应力水平,混凝土材料、钢筋及锈蚀钢筋、锈蚀钢筋混凝土梁疲劳性能的既有研究成果,总结了已有锈蚀公路钢筋混凝土桥梁的疲劳性能研究中存在的问题,提出了锈蚀钢筋混凝土梁疲劳性能研究面临的难点及发展趋势,以供致力于桥梁结构疲劳及长期性能的研究人员及工程技术人员参考。

No fatigue details were specified in current concrete bridge design code in China,which laged behind similar foreign design codes. Besides,concrete bridges took a large amount in highway bridges in China and along with rising traffic loads and structural degradation,fatigue behavior of concrete bridges has been laid greater attention in recent years. Based on the background mentioned above,researches on fatigue load and stress level,fatigue properties of concrete,steel bars as well as reinforced concrete beams on highway bridges were reviewed,a summary of the problems and trends in this field were given to provide reference for researchers and engineers engaged in fatigue and long term performances of bridges.