沥青路面动态黏弹反演研究  

Back-calculation study on asphalt pavement using dynamic viscoelastic method

作　　者：曹丹丹[1] 赵延庆[1] 田泽峰[2] 王国忠[3] 

机构地区：[1]大连理工大学,辽宁大连116024 [2]辽宁省交通科学研究院,辽宁沈阳110015 [3]山西省交通科学研究院,山西太原030006

出　　处：《土木工程学报》2017年第9期104-109,共6页China Civil Engineering Journal

基　　金：国家自然科学基金(51208080);山西交通科技项目(2015-1-22);内蒙古交通科技项目(NJ-2014-21)

摘　　要：对沥青路面结构进行动态黏弹反演,正向分析采用谱单元法,采用典型路面结构分析验证了谱单元法动态黏弹分析的正确性;采用实测和计算得到的路表弯沉整体时程曲线的均方误差作为反演误差控制方程,以序列二次规划算法作为优化算法,对路面结构层力学参数进行优化。对半刚性基层和复合式基层两种沥青路面结构动态进行黏弹反演,结果表明:利用谱单元法对沥青路面进行动态黏弹响应分析,可以极大地提高计算效率,动态反演可充分利用弯沉时程曲线的数据信息,反演得到的动态模量、相位角数主曲线组成完整的黏弹力学参数,可以更全面地描述沥青层的力学特性以及荷载作用频率和温度场的影响。动态黏弹反演方法可以弥补传统反演结果无法得到的力学参数主曲线的缺陷,为沥青路面分析及质量评定提供了有效的方法。Dynamic viscoelastic back-calculation of asphalt pavement was performed, and the spectral element method （SEM） was adopted as the forward analysis method. The validity of SEM for dynamic viscoelastic analysis of typical asphalt pavement structure was verified. The mean square error between the measured and calculated time-history curves of pavement surface deflection was used as the objective error function, and the sequential quadratic programming algorithm was utilized to optimize the mechanical parameters of asphalt pavement. The back-calculations were carried out for the asphalt pavement structure with semi-rigid base and composite base, respectively, and the results indicate that for the dynamic viscoelastic analysis, SEM can greatly enhance the computational efficiency. The complete viscoelastic parameters, including the dynamic modulus and the principal curves of phase angle obtained by back-calculation, could be employed to characterize the mechanical behavior and reflect the effects of loading frequency and temperature field. The defect of traditional back-calculation methods could be obviated by using the proposed approach, which can be used as an effective method for the analysis and quality assessment of asphalt pavement.

关 键 词：道路工程 谱单元法 时程曲线 动态反演 

分 类 号：U416.217[交通运输工程—道路与铁道工程]