Rehabilitation of concrete structures using advanced materials

加拿大的基础设施正在崩溃，有关严重结构性故障的报道越来越频繁。当前的经济危机要求我们开发创新的材料和具有成本效益的修复技术。先进的材料可以取代传统的修复方法，并在新的建筑中使用，以延长结构的使用寿命。因此，需要解决的关键研究问题是：先进材料将如何提高修复后的结构和新结构的性能？拟议研究计划的目的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)和自固结混凝土(SCC)等先进材料修复或预应力混凝土结构的适用性/强度、耐久性性能和监测。该研究计划将包括基础研究和应用研究，将实验室和分析工作结合起来。将对用先进材料修复和预应力的中等和足尺混凝土构件进行实验室试验，并将开发和校准模型以预测修复和预应力构件的性能。腐蚀环境中FRP纤维锚杆和FRCC修复后的构件(梁和板)在静力和循环荷载作用下的结构性能和耐久性。滑铁卢专利的FRP预应力构件锚由SCC制成或作为混凝土结构的加固措施。自固结混凝土(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扩展到位。在静载和循环荷载作用下，将建造钢筋混凝土梁和板，并用FRP筋进行预应力。这项研究将培养高素质的人员，并将在使用先进材料进行维修和新建筑方面为工程师、建筑师和业主提供宝贵的知识。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。

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.