Rehabilitation of concrete structures using advanced materials

使用先进材料修复混凝土结构

• 批准号: 203157-2011
• 负责人: Soudki, Khaled
• 金额: $ 0.47万
• 依托单位: University of Waterloo
• 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=523367
• 关键词: Rehabilitation; concrete; structures; using; advanced

Canadian infrastructure is crumbling and reports of drastic structural failures are becoming more frequent. The current economic crisis demands that we develop innovative materials and cost-effective repair techniques. Advanced materials can be used over traditional methods for repair and in new construction to extend the service life of structures. Thus the key research question to be addressed is: how will advanced materials improve the performance of repaired and new structures? The objective of the proposed research program is to obtain a better understanding of the serviceability/strength, durability performance and monitoring of concrete structures repaired or prestressed using advanced materials including fibre reinforced polymers (FRP), FRP + fibre anchors, fibre reinforced cement composites (FRCC), and self-consolidating concrete (SCC). The research program will comprise fundamental and applied research integrating laboratory and analytical work. Laboratory tests will be performed on medium and full-scale concrete members repaired and prestressed with advanced materials and models will be developed and calibrated to predict the performance of the repaired and prestressed members. The post-repair structural performance and durability of repaired members (beams and slabs) with FRP + fibre anchors and FRCC under static and cyclic loads in a corrosive environment. The Waterloo patented anchor for FRP prestressed members made from SCC or as a strengthening measure for concrete structures. Self-consolidating concrete (SCC) is a high performance highly flowable, nonsegregating concrete that can spread into place without any mechanical consolidation. Reinforced concrete beams and slabs made of SCC and prestressed with FRP tendons will be constructed and tested under static and cyclic loading conditions. The research will train highly qualified personal and will give engineers, architects and owners valuable knowledge on the use of advanced materials for repair and new construction. Thus it will significantly impact the lives of Canadians by means of efficient repairs and durable structures.

加拿大的基础设施正在崩溃，有关严重结构性故障的报道也越来越频繁。 当前的经济危机要求我们开发创新材料和具有成本效益的修复技术。与传统方法相比，先进材料可以用于修复和新建建筑，以延长结构的使用寿命。 因此，要解决的关键研究问题是：先进材料如何提高修复和新结构的性能？拟议研究计划的目标是更好地了解使用纤维增强聚合物（FRP）、FRP+纤维锚杆、纤维增强水泥复合材料（FRCC）和自密实混凝土（SCC）等先进材料修复或预应力的混凝土结构的使用性/强度、耐久性能和监测。该研究计划将包括结合实验室和分析工作的基础和应用研究。将对采用先进材料修复和预应力的中型和全尺寸混凝土构件进行实验室测试，并将开发和校准模型以预测修复和预应力构件的性能。采用FRP+纤维锚杆和FRCC修复的构件（梁和板）在腐蚀环境下的静载荷和循环载荷下的修复后结构性能和耐久性。 Waterloo 专利锚栓适用于由 SCC 制成的 FRP 预应力构件或作为混凝土结构的加固措施。 自密实混凝土 (SCC) 是一种高性能、高流动性、不离析的混凝土，无需任何机械固结即可铺展到位。由 SCC 制成并用 FRP 筋预应力的钢筋混凝土梁和板将在静态和循环荷载条件下进行建造和测试。该研究将培训高素质人才，并为工程师、建筑师和业主提供有关使用先进材料进行修复和新建的宝贵知识。 因此，它将通过有效的维修和耐用的结构对加拿大人的生活产生重大影响。