考虑层间接触状态的沥青路面力学性能分析
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作者单位:

1.清华大学土木工程系;2.新疆大学建筑工程学院

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中图分类号:

U416.2

基金项目:

交通基础设施全自动数据采集及智能分析平台建设(20203910013)


Mechanical properties analysis of asphalt pavement considering interlayer contact state
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Affiliation:

Department of Civil Engineering, Tsinghua University

Fund Project:

Construction of data collection and analysis platform for transportation infrastructure management

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    摘要:

    为了研究不同层间接触状态的沥青路面力学性能,借助ABAQUS构建路面三维有限元模型分析了路面温度场下不同的层间接触状态对路面力学性能的影响,并建立了考虑层间接触状态的疲劳性能预估模型。研究表明:当深度路面在0.68 m以上,路面温度与深度呈三次多项式关系、路面深度在0.1 m以上时路面温度与外界环境气温呈二次多项式关系;层间接触状态对沥青路面拉应力影响最大、剪应力次之、对竖向变形影响最小,低速、重载的车辆能使路面最大拉应力、最大剪应力、最大竖向位移分别增大90.0%、70.0%、63.2%;与完全连续状态相比,随着层间接触状态的劣化,沥青路面的疲劳寿命最大降低了75.6%。可见为延长路面的使用寿命,施工时应连续铺装压实,严格控制层间粘结质量。

    Abstract:

    In order to study the mechanical properties of asphalt pavement with different interlayer contact states, a three-dimensional finite element model of pavement was established to analyze the influence of different interlayer contact states on the mechanical properties under the temperature field. And a fatigue performance prediction model was established considering the interlayer contact states. The results show that when the depth of pavement is above 0.68m, the relationship between pavement temperature and depth is cubic polynomial, and when the depth of pavement is above 0.1m, the relationship between pavement temperature and ambient temperature is quadratic polynomial. The maximum tensile stress, maximum shear stress and maximum vertical displacement of asphalt pavement can be increased by 90.0%, 70.0% and 63.2% by vehicles with low speed and heavy load, respectively. Compared with the complete continuous state, the fatigue life of asphalt pavement is reduced by 75.6% with the deterioration of interlayer contact state.In order to prolong the service life of pavement, continuous pavement compaction should be carried out during construction, and the bonding quality between layers should be strictly controlled.

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引用本文

呙润华,张海虎. 考虑层间接触状态的沥青路面力学性能分析[J]. 科学技术与工程, , ():

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  • 收稿日期:2022-02-17
  • 最后修改日期:2022-05-04
  • 录用日期:2022-05-07
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