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Durability and Protection of Infrastructure

基础设施的耐用性和保护

基本信息

批准号：
RGPIN-2016-05897
负责人：
Razaqpur, Ghani
金额：
$ 3.06万
依托单位：
McMaster University
依托单位国家：
加拿大
项目类别：
Discovery Grants Program - Individual
财政年份：
2017
资助国家：
加拿大
起止时间：
2017-01-01 至 2018-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=636077
关键词：
Durability Protection Infrastructure

项目摘要

Fibre Reinforced Polymers (FRP) are increasingly used as substitute for steel reinforcement in concrete structures susceptible to reinforcement corrosion, but the safe and economical design of FRP reinforced members requires knowledge of their serviceability and strength under different stress fields. Currently, there is paucity of knowledge about the load carrying capacity of FRP reinforced concrete members subjected concurrently to shear, axial load, and bending, or, to shear, torsion and bending. To fill this gap, in the proposed research the behaviour and strength of FRP reinforced concrete members under combined actions will be investigated. Physical tests will be conducted on full scale beams/columns reinforced with glass or carbon FRP bars to determine their complete behaviour, mode of failure and ultimate capacity when concurrently subjected to different levels of shear, torsion and bending or to bending, axial compression and shear. Based on the appropriate constitutive laws of concrete and FRP, as well as their bond behaviour, robust, albeit practical, rational models will be developed for the design of such members and the models will be submitted to the CSA Standard S806 for possible inclusion in the new edition of the standard. Models based on the Softened Truss Model and the Modified Compression Field Theory will be used as the starting point.

纤维增强聚合物（FRP）作为钢筋的替代品越来越多地用于易受钢筋腐蚀的混凝土结构中，但FRP增强构件的安全经济设计需要了解其在不同应力场下的使用性能和强度。目前，关于FRP钢筋混凝土构件同时承受剪切、轴向载荷和弯曲，或剪切、扭转和弯曲的承载能力的知识缺乏。为了填补这一空白，在拟议的研究中，FRP增强混凝土构件在联合作用下的性能和强度将进行研究。将对用玻璃或碳FRP筋加固的全尺寸梁/柱进行物理试验，以确定它们在同时受到不同程度的剪切、扭转和弯曲或弯曲、轴向压缩和剪切时的完整行为、破坏模式和最终能力。基于适当的混凝土和FRP的本构律，以及它们的粘结行为，将为这些构件的设计开发稳健的、实用的、合理的模型，这些模型将提交给CSA标准S806，以便可能包含在新版标准中。基于软化桁架模型和修正压缩场理论的模型将作为起点。