层间粘结失效后桥面沥青铺装层细观力学行为分析

doi:10.13229/j.cnki.jdxbgxb.20230096

摘要/Abstract

摘要：

首先，通过室内单轴压缩试验、劈裂试验和斜剪试验及其数值仿真标定了沥青上面层、下面层及防水粘结层细观参数；然后，通过施加滚荷载和设置层间粘结失效区域，对各结构层材料的应力、位移、速度等力学行为进行监测。结果表明，沥青面层间的粘结失效会显著影响上面层与下面层顶部颗粒的应力和运动状态，且下面层颗粒横向应力响应明显变大；沥青面层与桥面板间的粘结失效导致下面层底部颗粒横向应力增大，层间出现横向移动趋势。通过监测层间粘结失效后不同结构层材料的力学状态变化可以预测桥面铺装层病害的发展，为桥面沥青铺装层预防性养护提供参考。

关键词: 道路工程, 桥面铺装, 离散元法, 细观力学, 层间粘结失效

Abstract:

Firstly， the mesoscopic parameters of asphalt upper layer， lower layer and waterproof bond layer were calibrated by uniaxial compression test， splitting test and oblique shear test. Then， by setting the failure area of interlayer bond， the stress， displacement and velocity of each structural layer was monitored. The results show that the bonding failure between asphalt surface layers significantly affects the stress and motion state of the top particles of the upper and lower layers， and the transverse stress of the bottom particles increases obviously. The bonding failure between the asphalt surface and the bridge panel leads to the increase of transverse stress of the particles at the bottom of the lower layer and the transverse movement trend between the layers. By monitoring the mechanical state changes of different structural layer materials after interlayer bonding failure， the development of bridge deck paving layer disease can be predicted， which can provide reference for preventive maintenance of asphalt bridge deck pavement.

Key words: road engineering, bridge deck pavement, discrete element method, meso-mechanical, interlaminar bonding failure

中图分类号:

U414

司春棣,崔亚宁,许忠印,凡涛涛. 层间粘结失效后桥面沥青铺装层细观力学行为分析[J]. 吉林大学学报(工学版), 2023, 53(6): 1719-1728.

Chun-di SI,Ya-ning CUI,Zhong-yin XU,Tao-tao FAN. Meso⁃mechanical behavior analysis of asphalt bridge deck pavement after interlayer bonding failure[J]. Journal of Jilin University(Engineering and Technology Edition), 2023, 53(6): 1719-1728.

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结构层位		颗粒密度/（kg·m^-3）	刚度比	拉伸强度/MPa	剪切强度/MPa	弹性模量/MPa
上面层	粗集料	2450	2.5	2.22	2.65	2200
上面层	砂浆	2100	2.5	1.36	1.85	72
下面层	粗集料	2450	2.0	1.8	2.3	3200
下面层	砂浆	2100	2.0	1.3	1.8	52
水泥混凝土桥面板	粗集料	2500	1	3.2	4.5	2900
水泥混凝土桥面板	砂浆	2150	1	4.5	5.4	250