长沙理工大学学报(自然科学版)
车-温耦合作用下沥青路面反射裂缝开裂影响因素研究
作者:
作者单位:

(1.石家庄铁道大学 交通运输学院,河北 石家庄 050043;2.石家庄铁道大学 省部共建交通工程结构力学行为与系统安全国家重点实验室,河北 石家庄 050043;3.石家庄铁道大学 河北省交通安全与控制省级重点实验室,河北 石家庄 050043;4.河北省高速公路京雄筹建处,河北 保定 071799;5.石家庄铁道大学 土木工程学院,河北 石家庄 050043)

作者简介:

通讯作者:

凡涛涛(1990—)(ORCID:0000-0002-4838-693X),男,讲师,主要从事路面功能材料开发、车-环-路耦合作用下路面结构动力响应方面的研究。E-mail: fantaotao@stdu.edu.cn

中图分类号:

U416.223

基金项目:

国家自然科学基金资助项目(11972237);河北省交通厅科技计划项目(JD-202007、JD-202006、JX-202010)


Study on the influence factors of reflective cracking in asphalt pavement under the vehicle-temperature coupling effect
Author:
Affiliation:

(1. School of Traffic and Transportation, Shijiazhuang Tiedao University, Shijiazhuang 050043, China; 2. State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang 050043, China; 3. Hebei Provincial Key Laboratory of Traffic Safety and Control, Shijiazhuang Tiedao University, Shijiazhuang 050043, China; 4. Hebei Highway Jingxiong Preparatory Office, Baoding 071799, China; 5. School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China)

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    摘要:

    【目的】通过对不同温度下道路内部的应力变化情况进行分析,探究沥青路面反射裂缝开裂的影响因素。【方法】首先,选取半刚性基层底部反射裂缝为研究对象,以反射裂缝尖端的应力强度因子和J积分为评价指标;然后,基于有限元法建立广义Maxwell模型,分析温度作用下道路内部的应力变化;最后,探究不同轮胎接地压力、行车速度以及温度-行车荷载耦合作用下半刚性基层反射裂缝尖端评价指标的变化规律。【结果】根据评价指标对比,当行驶速度由30 km/h增大至150 km/h时,Ⅰ、Ⅱ型应力强度因子的最大值分别减小了2.79%和5.62%;与行驶速度150 km/h相比,30 km/h所对应的J积分增大了18.0%;当轮胎接地压力由0.5 MPa增大至1.3 MPa时,Ⅰ、Ⅱ型应力强度因子的最大值均增大了160%,J积分增大了6.5倍,说明轮胎接地压力对反射裂缝应力强度因子的影响程度更大;车-温耦合状态下Ⅰ型应力强度因子均大于Ⅱ型应力强度因子,沥青路面基层横向反射裂缝为Ⅰ型开裂主导的复合型裂缝;J积分在低温-荷载情况下的数值大小为3.6×10-3 N/m,其数值明显比高温-荷载及荷载单独作用时的大。【结论】低温和超载对路面反射裂缝扩展的影响最显著,冬季应加强对沥青路面反射裂缝的检测。

    Abstract:

    [Purposes] In order to explore the factors that affect the reflective cracks on asphalt pavement, this study attempts to analyze the stress changes inside the road under different temperatures. [Method] First, the reflective cracks at the bottom of the semi-rigid base were selected as the research object, and the stress intensity factor and J-integral of the tip of the reflective cracks were used as the evaluation indexes. Then, a generalized Maxwell model was established based on the finite element method to analyze the stress changes inside the road under the action of temperature. Finally, The change laws of the evaluation index of reflective crack tip in semi-rigid base course under different tire pressure, vehicle speed and temperature-driving load coupling were explored. [Findings] According to the evaluation index comparison, when the vehicle speed increased from 30 km/h to 150 km/h, the maximum values of the stress intensity factors (mode I and mode Ⅱ) decreased by 2.79% and 5.62% respectively. Compared to the driving speed of 150 km/h, the J-integral corresponding to 30 km/h increased by 18.0%. When the tire contant pressures increased from 0.5 MPa to 1.3 MPa, both the maximum values of the stress intensity factors (mode I and mode Ⅱ) increased by 160%. The impact of tire contant pressure on the stress intensity factor of reflective cracks was greater than that of driving speed. Under the vehicle-temperature coupling conditions, the stress intensity factor of mode I was consistently higher than that of mode Ⅱ, and the cracking of transverse reflective cracks in the asphalt pavement base was a composite crack dominated by mode I. The value of the J-integral was 3.6×10-3 N/m under low temperature-load conditions, and the value was significantly higher than that of high temperature-load and load acting alone. [Conclusions] Low temperature and overload have the most significant impact on the propagation of reflective cracks on the pavement, and the detection of reflective cracks on asphalt pavement should be strengthened in winter.

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司春棣,凡涛涛,曹航,等.车-温耦合作用下沥青路面反射裂缝开裂影响因素研究[J].长沙理工大学学报(自然科学版),2023,20(6):69-79.
SI Chundi, FAN Taotao, CAO Hang, et al. Study on the influence factors of reflective cracking in asphalt pavement under the vehicle-temperature coupling effect[J]. Journal of Changsha University of Science & Technology (Natural Science),2023,20(6):69-79.

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  • 收稿日期:2023-07-24
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  • 在线发布日期: 2024-01-17
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