摘要
随着交通量的增长,公路桥梁的疲劳损伤问题越来越突出.为了保证桥梁的使用安全,对其进行疲劳寿命评估是当前很重要的课题.构建了一种基于连续损伤力学的非线性损伤累积模型,对桥梁主体结构钢筋混凝土桥面板的疲劳损伤进行了数值模拟,得到了其疲劳损伤累积的变化规律和疲劳寿命.计算结果表明,钢筋混凝土桥面板的疲劳损伤在桥梁运行后期增长速度较快,需加以关注;模型计算的疲劳寿命与实验结果比较吻合,证明了该模型的可靠性.
With the increase of traffic volume,the fatigue problem of highway bridges becomes more and more serious. In order to ensure the safety of the bridge,it is very important to evaluate the fatigue life of reinforced concrete bridge deck. In this paper,a non-linear damage cumulative model based on continuum damage mechanics is constructed. Then,the fatigue damage of reinforced concrete bridge deck is simulated numerically. At last,the rule of fatigue damage accumulation and fatigue life are obtained. The results show that in the later period of the bridge operation,the fatigue damage of reinforced concrete bridge deck increases rapidly,which needs to be paid attention to. The results also show that the fatigue life calculated by the model is in good agreement with the experimental results,which proves the reliability of the model.
作者
邓爱民
沈潇
DENG Aimin;SHEN Xiao(College of Mechanics and Materials,Hohai University,Nanjing 211100,China)
出处
《河南科学》
2019年第6期981-987,共7页
Henan Science
基金
国家自然科学基金青年基金(50508156)
关键词
疲劳损伤
连续损伤力学
非线性损伤
钢筋混凝土桥面板
fatigue damage
continuum damage mechanics
nonlinear damage
reinforced concrete bridge deck
