Strengthening Concrete Structures with Smart Materials

用智能材料加固混凝土结构

基本信息

  • 批准号:
    RGPIN-2015-05987
  • 负责人:
  • 金额:
    $ 1.6万
  • 依托单位:
  • 依托单位国家:
    加拿大
  • 项目类别:
    Discovery Grants Program - Individual
  • 财政年份:
    2018
  • 资助国家:
    加拿大
  • 起止时间:
    2018-01-01 至 2019-12-31
  • 项目状态:
    已结题

项目摘要

Deterioration of Reinforced Concrete (RC) structures is a never-ending problem that incites civil engineers around the world to seek innovative durable strengthening techniques and high performance advanced materials. Recently, a new class of smart materials called Shape Memory Alloys (SMA) has been attracting the attention of researchers from different fields due to their superior properties. The SMA is a unique class of alloy with the ability to undergo large deformations and return to its original shape through stress removal. Besides their super-elasticity, corrosion and fatigue resistivity, SMAs are mainly characterized by the Shape Memory Effect (SME) phenomenon that is inherited through their unique thermo-mechanical properties. The SME represents the ability of the SMAs to recover their original shape after being deformed beyond the elastic limits upon heating. SMAs with the SME property can be used as external prestressed reinforcement by providing active strengthening to RC members. ***The most common SMA is made of Nickel and Titanium (NiTi). The use of NiTi-SMAs in civil engineering applications was limited due to their relatively higher cost. However, the recent development of corrosion resistant iron-based Fe-SMA with considerably lower cost and high recovery stress, have made it to be the choice for structural applications. The motivation of this research is driven by the fact that Fe-SMA in strengthening RC beams and columns has not yet been addressed.***The main objective of this research is to investigate experimentally and analytically the effectiveness and feasibility of two active strengthening techniques without the need of any mechanical anchorage/jacking systems for the prestressing operation. The proposed two techniques are: one for confining RC columns using Fe-SMA wires and one for flexural strengthening of RC beams using Fe-SMA bars. Both techniques rely on the recovery stress generated as the Fe-SMA transforms to its recovery (un-deformed) state upon heating. The SMA is temperature sensitive, and thus, it is important to investigate the environmental exposure effect on the performance of RC members strengthened with SMA. The effect of cyclic loading and unloading is also important to investigate if it affects the active stress in the SMA. With the unique properties of Fe-SMA, actively confining RC columns using Fe-SMA wires and actively strengthening RC beams in flexure using Fe-SMA bars is expected to produce a significantly ductile structural member.***The findings of this research are expected to add valuable knowledge to the field and widen the potential applications of the Fe-SMA in strengthening RC structures. ***My research gives explicit priority to the education/training of HQP, seeks to promote increased network interactions/collaborations, and has the potential for technological impact for both immediate and long-term benefits to the research community.
钢筋混凝土(RC)结构的恶化是一个永无止境的问题,激励着世界各地的土木工程师寻求创新的耐用加固技术和高性能的先进材料。最近,一类新的智能材料形状记忆合金(SMA)因其优异的性能而引起了不同领域研究人员的关注。SMA是一类独特的合金,具有承受大变形并通过消除应力恢复其原始形状的能力。除了具有超弹性、耐蚀性和疲劳电阻性外,sma的主要特点是其独特的热机械性能所继承的形状记忆效应(SME)现象。SME表示sma在加热后变形超过弹性极限后恢复其原始形状的能力。具有SME特性的sma可以作为外部预应力钢筋,为RC构件提供主动加固。***最常见的SMA由镍和钛(NiTi)制成。由于其相对较高的成本,niti - sma在土木工程应用中的使用受到限制。然而,最近开发的耐腐蚀铁基Fe-SMA具有相当低的成本和高恢复应力,使其成为结构应用的选择。这项研究的动机是由铁- sma在钢筋混凝土梁和柱的加固中尚未得到解决的事实所驱动的。***本研究的主要目的是实验和分析两种主动加固技术的有效性和可行性,而不需要任何机械锚固/顶升系统进行预应力操作。提出的两种技术是:一种是用铁- sma钢丝约束RC柱,一种是用铁- sma钢筋加固RC梁。这两种技术都依赖于Fe-SMA在加热时转变为恢复(未变形)状态时产生的恢复应力。SMA对温度敏感,因此研究环境暴露对SMA加固RC构件性能的影响具有重要意义。循环加载和卸载的影响对于研究它是否影响SMA的活性应力也很重要。利用铁- sma的独特性能,利用铁- sma钢丝主动约束钢筋混凝土柱,利用铁- sma钢筋主动加强钢筋混凝土梁的弯曲,有望产生具有显著延性的结构构件。***本研究结果有望为该领域增加宝贵的知识,并扩大Fe-SMA在钢筋混凝土结构加固方面的潜在应用。***我的研究明确优先考虑HQP的教育/培训,寻求促进更多的网络互动/合作,并为研究界带来即时和长期利益的潜在技术影响。

项目成果

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ElHacha, Raafat其他文献

ElHacha, Raafat的其他文献

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{{ truncateString('ElHacha, Raafat', 18)}}的其他基金

Strengthening Concrete Structures with Smart Materials
用智能材料加固混凝土结构
  • 批准号:
    RGPIN-2015-05987
  • 财政年份:
    2019
  • 资助金额:
    $ 1.6万
  • 项目类别:
    Discovery Grants Program - Individual
Probabilistic life cycle analysis of alternative reinforcement products
替代加固产品的概率生命周期分析
  • 批准号:
    508894-2017
  • 财政年份:
    2017
  • 资助金额:
    $ 1.6万
  • 项目类别:
    Connect Grants Level 1
Strengthening Concrete Structures with Smart Materials
用智能材料加固混凝土结构
  • 批准号:
    RGPIN-2015-05987
  • 财政年份:
    2017
  • 资助金额:
    $ 1.6万
  • 项目类别:
    Discovery Grants Program - Individual
Probabilistic life cycle analysis of alternative reinforcement products in the design of concrete structures - Phase One: Laboratory Durability Testing
混凝土结构设计中替代加固产品的概率生命周期分析 - 第一阶段:实验室耐久性测试
  • 批准号:
    514608-2017
  • 财政年份:
    2017
  • 资助金额:
    $ 1.6万
  • 项目类别:
    Engage Grants Program
Strengthening Concrete Structures with Smart Materials
用智能材料加固混凝土结构
  • 批准号:
    RGPIN-2015-05987
  • 财政年份:
    2016
  • 资助金额:
    $ 1.6万
  • 项目类别:
    Discovery Grants Program - Individual
Verification of a Newly Developed Wireless Sensor for Monitoring the Quality and Strength of Concrete in Cold Weather Environment
验证新开发的用于在寒冷天气环境下监测混凝土质量和强度的无线传感器
  • 批准号:
    480809-2015
  • 财政年份:
    2015
  • 资助金额:
    $ 1.6万
  • 项目类别:
    Interaction Grants Program
Strengthening Concrete Structures with Smart Materials
用智能材料加固混凝土结构
  • 批准号:
    RGPIN-2015-05987
  • 财政年份:
    2015
  • 资助金额:
    $ 1.6万
  • 项目类别:
    Discovery Grants Program - Individual
Development of Reliability Index and Design of Barrier for Bridge Systems used in Transporting Extremely Large Mining Trucks
超大型矿用卡车运输桥梁系统可靠性指标的制定和屏障设计
  • 批准号:
    477029-2014
  • 财政年份:
    2014
  • 资助金额:
    $ 1.6万
  • 项目类别:
    Engage Grants Program
New bridge construction using an innovative hybrid FRP-UHP concrete deck systems
使用创新的混合 FRP-UHP 混凝土桥面系统的新桥梁施工
  • 批准号:
    299066-2010
  • 财政年份:
    2014
  • 资助金额:
    $ 1.6万
  • 项目类别:
    Discovery Grants Program - Individual
Validation of Structural Behaviour of Precast Ultra High Performance Fiber Reinforced Cementitious Composite Cross Arms for Electrical Lines
电力线路预制超高性能纤维增强水泥基复合横担的结构性能验证
  • 批准号:
    394901-2010
  • 财政年份:
    2013
  • 资助金额:
    $ 1.6万
  • 项目类别:
    Collaborative Research and Development Grants

相似海外基金

Eco-Friendly Natural Basalt FRP for External Strengthening of Concrete Structures: Development of Constitutive Bond-Slip Laws and Design Models for Basalt FRP/Concrete Interface
用于混凝土结构外部加固的环保天然玄武岩 FRP:玄武岩 FRP/混凝土界面本构粘结滑移定律和设计模型的发展
  • 批准号:
    RGPIN-2022-03592
  • 财政年份:
    2022
  • 资助金额:
    $ 1.6万
  • 项目类别:
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FRP Strengthening of Underground Reinforced Concrete Structures (Manholes and Transformer Vaults)
地下钢筋混凝土结构(沙井、变压器拱顶)FRP加固
  • 批准号:
    574822-2022
  • 财政年份:
    2022
  • 资助金额:
    $ 1.6万
  • 项目类别:
    University Undergraduate Student Research Awards
Eco-Friendly Natural Basalt FRP for External Strengthening of Concrete Structures: Development of Constitutive Bond-Slip Laws and Design Models for Basalt FRP/Concrete Interface
用于混凝土结构外部加固的环保天然玄武岩 FRP:玄武岩 FRP/混凝土界面本构粘结滑移定律和设计模型的发展
  • 批准号:
    DGECR-2022-00481
  • 财政年份:
    2022
  • 资助金额:
    $ 1.6万
  • 项目类别:
    Discovery Launch Supplement
Structural strengthening and seismic retrofitting of corrosion-damaged concrete structures
腐蚀损坏混凝土结构的结构加固和抗震加固
  • 批准号:
    RGPIN-2017-04278
  • 财政年份:
    2021
  • 资助金额:
    $ 1.6万
  • 项目类别:
    Discovery Grants Program - Individual
Strengthening Concrete Structures with Smart Materials
用智能材料加固混凝土结构
  • 批准号:
    RGPIN-2015-05987
  • 财政年份:
    2020
  • 资助金额:
    $ 1.6万
  • 项目类别:
    Discovery Grants Program - Individual
Structural strengthening and seismic retrofitting of corrosion-damaged concrete structures
腐蚀损坏混凝土结构的结构加固和抗震加固
  • 批准号:
    RGPIN-2017-04278
  • 财政年份:
    2020
  • 资助金额:
    $ 1.6万
  • 项目类别:
    Discovery Grants Program - Individual
Effective Repair and Strengthening of Damaged Concrete Structures with Consideration of Porous and Meso Structures
考虑多孔和细观结构的受损混凝土结构的有效修复和加固
  • 批准号:
    19K04684
  • 财政年份:
    2019
  • 资助金额:
    $ 1.6万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Structural strengthening and seismic retrofitting of corrosion-damaged concrete structures
腐蚀损坏混凝土结构的结构加固和抗震加固
  • 批准号:
    RGPIN-2017-04278
  • 财政年份:
    2019
  • 资助金额:
    $ 1.6万
  • 项目类别:
    Discovery Grants Program - Individual
Strengthening Concrete Structures with Smart Materials
用智能材料加固混凝土结构
  • 批准号:
    RGPIN-2015-05987
  • 财政年份:
    2019
  • 资助金额:
    $ 1.6万
  • 项目类别:
    Discovery Grants Program - Individual
Structural strengthening and seismic retrofitting of corrosion-damaged concrete structures
腐蚀损坏混凝土结构的结构加固和抗震加固
  • 批准号:
    RGPIN-2017-04278
  • 财政年份:
    2018
  • 资助金额:
    $ 1.6万
  • 项目类别:
    Discovery Grants Program - Individual
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