Experimental and Multi-Scale Damage and Healing Characterization of Asphaltic Road Materials: Experimental and Computational Studies

沥青道路材料的实验和多尺度损伤及修复特征：实验和计算研究

• 批准号: 217033-2012
• 负责人: Berthelot, Curtis
• 金额: $ 1.53万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=523667
• 关键词: Experimental; Multi; Scale; Damage; Healing

Road transportation infrastructure plays a direct supportive role to the Canadian economy. Unfortunately, the deteriorated condition state of much of Canada's road infrastructure has created a significant liability for all Canadians, present and future. In the past, the road industry has predominantly relied on empirical based engineering methods for the road structural design and materials selection. Because they are historic based, these traditional empirical road engineering methods are limited because they cannot explicitly quantify road field performance across different traffic, innovative road materials, innovative road structural designs, and alternative road asset management policies. This proposal focuses on the development of mechanistic based road engineering and asset management systems for improved design and materials specifications for Canadian roads. This research proposes to incorporate multi-scale damage-healing mechanics into the existing non-linear-orthotropic continuum road engineering design and materials design systems. In the proposed research, a multi-scale road modeling framework that predicts the damage and healing of road materials in Canadian conditions utilizing the Canadian Light Source will validate damage and healing models of various Canadian asphaltic concrete pavements investigated. This research will explore diverse aspaltic road systems based on laboratory characterization and evaluation of field performance test sections. This research will also evaluate the holistic economics associated with improved whole life road performance prediction to help Canada optimize infrastructure investment based on life cycle performance prediction in optimized capital investment framework that is based on science instead of relying on traditional capital budget allocation approaches. This research is uniquely capable to employ the Canadian Light Source for the prediction and validation of microfracture and plasticity flow within Canadian asphaltic pavements and will provide scientific based pavement performance predictions of diverse Canadian pavements and field state conditions.

公路运输基础设施对加拿大经济起着直接的支持作用。 不幸的是，加拿大大部分道路基础设施的状况恶化，对所有加拿大人，现在和未来都产生了重大责任。 过去，道路行业主要依靠基于经验的工程方法来进行道路结构设计和材料选择。 由于它们是基于历史的，因此这些传统的经验公路工程方法受到限制，因为它们无法明确量化不同交通，创新的道路材料，创新的道路结构设计和替代道路资产管理政策的道路现场性能。 该提案着重于开发基于机械的道路工程和资产管理系统，以改善加拿大道路的设计和材料规格。 这项研究建议将多尺度的损伤机械师纳入现有的非线性正式连续性公路工程设计和材料设计系统。 在拟议的研究中，使用加拿大光源在加拿大条件下预测道路材料的损害和愈合的多尺度道路建模框架将验证所研究的加拿大各种加拿大沥青混凝土路面的损害和康复模型。 这项研究将基于实验室表征和现场绩效测试部分的评估来探索各种阿斯巴马托道路系统。 这项研究还将评估与改进的整个生命绩效预测相关的整体经济学，以帮助加拿大优化基于生命周期绩效预测的基础设施投资，这是基于科学的优化资本投资框架，而不是依靠传统的资本预算分配方法。 这项研究具有独特的能力，能够利用加拿大光源来预测和验证加拿大沥青式路面内的微裂纹和可塑性流，并将为加拿大各种人行道和现场状况的基于科学的路面绩效预测。