Structural performance evaluation of industrial floor slabs using Fiber Reinforced Concrete (FRC) through analytical and experimental investigation

通过分析和实验研究评估使用纤维增强混凝土（FRC）的工业楼板的结构性能

• 批准号: 565049-2021
• 负责人: Kianoush, Reza
• 金额: $ 1.62万
• 依托单位: Ryerson University
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=722178
• 关键词: Structural; performance; evaluation; industrial; floor

The Canadian construction market has been heavily influenced by industrial/commercial construction in recent years. The concrete slab-on-grade construction in most industrial applications is generally designed to avoid limitations in the future flexibility of most industrial buildings, resulting in design solutions that rely on the volume of structural material to resolve potential future capacity deficiencies. In such structures cracking is quite common and many of these slabs start developing the first signs of cracking only after a few years of being in service. Such cracking is either load-related (i.e. weakened subgrade, too little slab thickness, overloading) or attributable to temperature or environment (i.e. shrinkage), or is caused by a combination of these factors. In this research, the use of fiber reinforced concrete (FRC) over conventional concrete as a potential solution to overcome structural capacity, durability, and cracking problems in industrial floor systems will be studied through several experimental and numerical case studies. A good understanding of the behaviour of these structures is necessary in order to meet design objectives, while containing construction and maintenance costs. The goal is to improve the concrete technology and to provide engineers with practical design guidelines in an effort to introduce a superior design solution. The main objective is to investigate if the proper choice of a newly developed material such as FRC could lead to a superior and more efficient structural performance in the vulnerable regions of large industrial floors, as compared to the customary concrete material typically used in today's practice. The study involves testing plain and FRC slab and beam specimens subjected to a monotonic loading condition. A state-of-the-art numerical model will also be developed to simulate the experimental program for parametric studies. It is expected that this research program will provide a useful framework to better understand the behavior of large concrete industrial floor systems under a wide range of applicable design criteria. This framework will be useful towards the development of practical design guidelines for these structures and beneficial to the Canadian economy.

近年来，加拿大建筑市场受到工业/商业建筑的严重影响。在大多数工业应用中，混凝土板级结构的设计通常是为了避免限制大多数工业建筑未来的灵活性，导致设计解决方案依赖于结构材料的体积来解决潜在的未来容量不足。在这样的结构开裂是相当普遍的，许多这些板开始发展开裂的第一个迹象，只有经过几年的服务。这种开裂或与荷载有关（即路基软弱、楼板厚度过薄、超载），或可归因于温度或环境（即收缩），或由这些因素共同引起。在本研究中，将通过几个实验和数值案例研究，研究纤维增强混凝土（FRC）取代传统混凝土作为克服工业楼板系统结构容量、耐久性和开裂问题的潜在解决方案。为了满足设计目标，同时控制施工和维护成本，对这些结构的行为有一个很好的理解是必要的。目标是改进混凝土技术，并为工程师提供实用的设计指南，以努力引入卓越的设计解决方案。主要目的是研究与当今实践中通常使用的传统混凝土材料相比，如果正确选择新开发的材料（如FRC），是否可以在大型工业地板的脆弱区域提供更优越、更有效的结构性能。该研究包括对单调加载条件下的平原和FRC板和梁试件进行测试。还将开发一个最先进的数值模型来模拟参数研究的实验程序。预计本研究计划将提供一个有用的框架，以更好地理解大型混凝土工业楼板系统在广泛适用的设计标准下的行为。这一框架将有助于为这些结构制定实用的设计准则，并有利于加拿大经济。