Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Performance of Exterior RC Beam Column Joint Retrofitted with HP-FRC
The present study investigated the performance of non-seismically detailed beam- column joint (BCJ) retrofitted with high-performance hybrid fiber reinforced cement composite (HP-FRC) under quasi static reverse cyclic loading. A total of 20 mixes were developed to attain the strength more than 100 MPa. The mix prepared with the addition of 2% hybrid fibers (1% crimped and 1% hooked fiber by volume of mix) attained the 105 MPa at 28 days of water curing. The BCJ specimens were initially damaged at two different stress levels i.e., moderate and severe damage levels. The results obtained in reference specimen was compared with its retrofitted specimens in terms of hysteresis curve, energy dissipation capacity, stiffness variation, and joint stresses. The overall performance of the specimen retrofitting with HP-FRC was improved. The decrease in initial damage level increased the efficacy of HP-FRC in improving the seismic performance of retrofitted BCJ. Further, the hooked steel fibers assisted in regaining the original strength and negating the spalling of concrete during ultimate failure. The secant stiffness variation also displayed that the retrofitted specimen helped in improving the stiffness of joint.
Performance of Exterior RC Beam Column Joint Retrofitted with HP-FRC
The present study investigated the performance of non-seismically detailed beam- column joint (BCJ) retrofitted with high-performance hybrid fiber reinforced cement composite (HP-FRC) under quasi static reverse cyclic loading. A total of 20 mixes were developed to attain the strength more than 100 MPa. The mix prepared with the addition of 2% hybrid fibers (1% crimped and 1% hooked fiber by volume of mix) attained the 105 MPa at 28 days of water curing. The BCJ specimens were initially damaged at two different stress levels i.e., moderate and severe damage levels. The results obtained in reference specimen was compared with its retrofitted specimens in terms of hysteresis curve, energy dissipation capacity, stiffness variation, and joint stresses. The overall performance of the specimen retrofitting with HP-FRC was improved. The decrease in initial damage level increased the efficacy of HP-FRC in improving the seismic performance of retrofitted BCJ. Further, the hooked steel fibers assisted in regaining the original strength and negating the spalling of concrete during ultimate failure. The secant stiffness variation also displayed that the retrofitted specimen helped in improving the stiffness of joint.
Performance of Exterior RC Beam Column Joint Retrofitted with HP-FRC
RILEM Bookseries
Beushausen, Hans (Herausgeber:in) / Ndawula, Joanitta (Herausgeber:in) / Alexander, Mark (Herausgeber:in) / Dehn, Frank (Herausgeber:in) / Moyo, Pilate (Herausgeber:in) / Srivastava, Shubham (Autor:in) / Bansal, Prem Pal (Autor:in) / Sharma, Raju (Autor:in) / Chopra, Tanuj (Autor:in)
International Conference on Concrete Repair, Rehabilitation and Retrofitting ; 2024 ; Cape Town, South Africa
01.11.2024
10 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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