论文部分内容阅读
为了研究钢桥面铺装材料的高温变形特性及其车辙预估方法,针对MA及SMA两种钢桥面铺装混合料,采用三轴重复加载试验评价其高温性能,并根据试验结果,通过多元线性回归得到材料的非线性计算模型参数,使用ABAQUS有限元软件,模拟三轴试验过程,将计算变形与实测变形相比较。发现两种混合料高温变形发展规律以及对不同荷载条件的响应方式不同,SMA具有优异的高温抗变形能力;有限元模拟的误差约为10%。分析结果表明:采用三轴重复加载试验和多元线性回归确定材料的非线性计算模型参数的方法可靠,模型参数可用于沥青桥面铺装的车辙变形预估。
In order to study the high-temperature deformation characteristics of steel deck pavement materials and the method of rutting prediction, the MA and SMA two types of steel bridge deck pavement mixture, using three-axis repeated loading test to evaluate the high temperature performance, and based on the test results Multivariate linear regression was used to obtain the nonlinear model parameters of the material. The ABAQUS finite element software was used to simulate the triaxial test. The calculated deformation was compared with the measured deformation. It is found that SMA has excellent high temperature resistance to deformation due to different rules of high temperature deformation and response to different loading conditions. The error of finite element simulation is about 10%. The analysis results show that the method of determining the nonlinear model parameters of the material by three-axis repeated loading test and multiple linear regression is reliable, and the model parameters can be used to predict the rut deformation of asphalt pavement.