Structural Engineering and Mechanics

  • 제63권4호
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  • Pages.497-507
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  • 2017
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Seismic response of RC structures rehabilitated with SMA under near-field earthquakes

  • Shiravand, M.R. (Department of Civil Engineering, Shahid Beheshti University) ;
  • Khorrami Nejad, A. (Department of Civil Engineering, Shahid Beheshti University) ;
  • Bayanifar, M.H. (Department of Civil Engineering, Qazvin Branch of Islamic Azad University)
  • 투고 : 2016.12.01
  • 심사 : 2017.05.30
  • 발행 : 2017.08.25
⟨ 이전 논문 다음 논문 ⟩

초록

During recent earthquakes, a significant number of concrete structures suffered extensive damage. Conventional reinforced concrete structures are designed for life-time safety that may see permanent inelastic deformation after severe earthquakes. Hence, there is a need to utilize adequate materials that have the ability to tolerate large deformation and get back to their original shape. Super-elastic shape memory alloy (SMA) is a smart material with unique properties, such as the ability to regain undeformed shape by unloading or heating. In this research, four different stories (three, five, seven and nine) of reinforced concrete (RC) buildings have been studied and subjected to near-field ground motions. For each building, two different types of reinforcement detailing are considered, including (1) conventional steel reinforcement (RC frame) and (2) steel-SMA reinforcement (SMA RC frame), with SMA bars being used at plastic zones of beams and steel bars in other regions. Nonlinear time history analyses have been performed by "SeismoStruct" finite element software. The results indicate that the application of SMA materials in plastic hinge regions of the beams lead to reduction of the residual displacement and consequently post-earthquake repairs. In general, it can be said that shape memory alloy materials reduce structural damage and retrofit costs.

키워드

참고문헌

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피인용 문헌

  1. Retrofit of non-seismically designed beam-column joints by post-tensioned superelastic shape memory alloy bars vol.16, pp.11, 2018, https://doi.org/10.1007/s10518-018-0323-y
  2. Seismic Strengthening of Deficient Reinforced Concrete Frames Using Reinforced Concrete Haunch vol.116, pp.1, 2017, https://doi.org/10.14359/51710874
  3. A Multi Record Based Artificial Near Fault Ground Motion Generation Method vol.7, pp.None, 2020, https://doi.org/10.1016/j.mex.2019.10.036
  4. Response Modification Factor of RC Frames Strengthened with RC Haunches vol.2020, pp.None, 2017, https://doi.org/10.1155/2020/3835015
  5. Fragility-based performance evaluation of mid-rise reinforced concrete frames in near field and far field earthquakes vol.76, pp.6, 2020, https://doi.org/10.12989/sem.2020.76.6.751