混凝土路面板早期开裂疲劳寿命预测
发布时间：2018-12-30 20:41
【摘要】：为准确预测水泥混凝土路面板在早期裂缝情况下的疲劳寿命,帮助制定合理的维修计划、延长道路使用寿命,该文通过小梁四点弯拉及混凝土板疲劳加载试验,研究了混凝土断裂力学参数及疲劳行为,并对有裂缝混凝土板的疲劳寿命进行预测分析。试验研究和模型预测均表明:混凝土路面板早期开裂疲劳寿命或破损过程分为3个阶段,且板的疲劳断裂寿命远小于传统模型预测值;开放交通时间的早晚对板的疲劳寿命有至关重要影响。研究结果对于准确预测疲劳寿命和及时进行路面维修与裂缝处理具有实际意义。
[Abstract]:In order to accurately predict the fatigue life of cement concrete pavement slab under the condition of early crack, to help make reasonable maintenance plan and prolong the service life of road, the paper passes the fatigue loading test of trabeculae and concrete slab. The fracture mechanics parameters and fatigue behavior of concrete are studied, and the fatigue life of cracked concrete slabs is predicted and analyzed. The experimental study and model prediction show that the early crack fatigue life or damage process of concrete pavement slab can be divided into three stages, and the fatigue fracture life of the slab is much smaller than the predicted value of the traditional model. The morning and evening of the open traffic time has a vital effect on the fatigue life of the plate. The results are of practical significance for accurately predicting fatigue life and timely pavement maintenance and crack treatment.
【作者单位】： 清华大学土木工程系 土木工程安全与耐久教育部重点实验室;
【基金】：交通运输部西部交通科技项目(2011318223710) 云南省交通厅科技项目(云交科2013(A)06,(C)02)
【分类号】：U416.216;U418.6
[Abstract]:In order to accurately predict the fatigue life of cement concrete pavement slab under the condition of early crack, to help make reasonable maintenance plan and prolong the service life of road, the paper passes the fatigue loading test of trabeculae and concrete slab. The fracture mechanics parameters and fatigue behavior of concrete are studied, and the fatigue life of cracked concrete slabs is predicted and analyzed. The experimental study and model prediction show that the early crack fatigue life or damage process of concrete pavement slab can be divided into three stages, and the fatigue fracture life of the slab is much smaller than the predicted value of the traditional model. The morning and evening of the open traffic time has a vital effect on the fatigue life of the plate. The results are of practical significance for accurately predicting fatigue life and timely pavement maintenance and crack treatment.
【作者单位】： 清华大学土木工程系 土木工程安全与耐久教育部重点实验室;
【基金】：交通运输部西部交通科技项目(2011318223710) 云南省交通厅科技项目(云交科2013(A)06,(C)02)
【分类号】：U416.216;U418.6
【共引文献】
相关期刊论文 前9条
1 安康;胡少伟;;双裂缝混凝土试件断裂过程试验研究[J];低温建筑技术;2014年02期
2 谷建义;何小兵;马银华;;基于断裂力学的水泥混凝土路面割缝发展分析[J];公路交通科技(应用技术版);2014年04期
3 吴瑶;李庆华;徐世p，
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