| 基于弯沉盆的半刚性基层脱空判识方法 |
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| 引用本文： | 陈南,曹长伟,凌建明,魏宏.基于弯沉盆的半刚性基层脱空判识方法[J].同济大学学报(自然科学版),2014,42(5):0695-0700. |
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| 作者姓名： | 陈南 曹长伟 凌建明 魏宏 |
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| 作者单位： | 同济大学 道路与交通工程教育部重点实验室，上海 201804;中国路桥工程有限责任公司，北京 100011;同济大学 道路与交通工程教育部重点实验室，上海 201804;同济大学 道路与交通工程教育部重点实验室，上海 201804 |
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| 基金项目： | 国家自然科学基金项目（2012AA112505） |
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| 摘 要： | 建立了基层脱空路面3维动力学模型,分析了脱空范围、脱空高度、基层开裂情况对弯沉盆的影响规律,并且比较了基层脱空和其他基层损坏的弯沉盆异常响应特征.通过相关性分析,提出采用弯沉比和面积指标作为基层脱空判定指标,并且提出了相应的判定标准.最后,根据结构层缺陷弥散假设,分析了脱空面积与土基等效模量损失之间的关系,建立了估算脱空面积的经验回归模型.
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| 关 键 词： | 沥青路面 基层脱空 动力学分析 结构响应 弯沉盆参数 脱空面积估算 |
| 收稿时间： | 2013/6/18 0:00:00 |
| 修稿时间： | 1/9/2014 12:00:00 AM |
Identification Method of Semi rigid Base Disengagement Based on Deflection Basin |
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| CHEN Nan,CAO Changwei,LING Jianming and WEI Hong.Identification Method of Semi rigid Base Disengagement Based on Deflection Basin[J].Journal of Tongji University(Natural Science),2014,42(5):0695-0700. |
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| Authors: | CHEN Nan CAO Changwei LING Jianming and WEI Hong |
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| Institution: | Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai 201804, China;China Road and Bridge Corporation, Beijing 100011, China;Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai 201804, China;Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai 201804, China |
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| Abstract: | A 3D finite element model of a base disengaging pavement structure was built for dynamic analysis. The effects of disengaging area, gap height and base cracking on deflection basin were analyzed and characteristics of deflection basin for a base disengaging structure were compared with other base damages. According to a correlation analysis, DR4 and AREA4 were proposed as judging index for identification of base disengagement. Based on an assumption of defects dispersion, relationship between disengaging area and equivalent modulus decrease was analyzed and an empirical model in estimating disengaging area was put forward. |
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| Keywords: | asphalt pavement base disengagement dynamic analysis structure response deflection basin parameters estimation of disengaging area |
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