摘要
为研究沥青混凝土与连续配筋混凝土复合式路面(CRCP)推移病害产生机理,利用弹性层状体系对复合式路面结构进行建模,并使用路段实测数据对模型层间黏结状态进行校准。在层间力学行为分析中发现水平力系数为1时,轮后存在拉剪区域,拉剪区域的出现可能导致该区域先于最大层间剪应力位置破坏。结合相关试验数据分析表明:同样在水平力系数为1的情况下,常温标准轴载作用下不会导致最大拉应力位置先于最大剪应力位置破坏;而在高温超载作用下,最大剪应力位置疲劳寿命相较常温标准轴载降低,最大拉应力位置层间失去黏结,荷载产生的剪应力将导致层间直接破坏。在实际路面调查中,在长大纵坡+弯道处发现U形裂缝,严重时AC面层大面积脱落。
In order to study the slippage mechanism of asphalt concrete overlay on continuous reinforced concrete composite pavement(CRCP),the structure of the composite pavement was modeled using the elastic layered system,and the interlayer bonding state of the model was calibrated by the measured data of the road.In the analysis of interlayer mechanical behavior,it was found that when the horizontal force coefficient was 1,there existed a tension-shear zone behind the wheel,which may lead to the failure of this zone prior to the position of the maximum interlayer shear stress.Relevant test data analysis shows that when the horizontal force coefficient is 1,under the action of the normal temperature and standard axle load,the maximum tensile stress position is not destroyed before the maximum shear stress position.Under the action of high temperature and overload,the fatigue life of the maximum shear stress position is lower than that under the normal temperature and standard axle load.The maximum tensile stress position loses bonding between the layers,and the shear stress caused by the load will lead to direct destruction between the layers.In the field road survey,a U-shaped crack is found in the long longitudinal slope and curve position,and the AC surface layer falls off in a large area when the crack is serious.
作者
程小亮
邓福昊
王阳
韩雷雷
周吴军
CHENG Xiaoliang;DENG Fuhao;WANG Yang;HAN Leilei;ZHOU Wujun(WISDRI City Construction Engineering&Research Incorporation Ltd.,Wuhan,Hubei 430000,China;WISDRI Engineering&Research Incorporation Ltd.,Wuhan,Hubei 430223,China;School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan,Hubei 430074,China)
出处
《中外公路》
2024年第2期54-60,共7页
Journal of China & Foreign Highway
基金
国家自然科学基金资助项目(编号:51708244)
中央高校基本科研业务费专项资金资助项目(编号:2018KFYYXJJ002)。
