PSI - Issue 64

Maria Ntina et al. / Procedia Structural Integrity 64 (2024) 2036–2043 Maria Ntina/ Structural Integrity Procedia 00 (2019) 000–000

2043

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4. Conclusions This work attempts through a case study to investigate the potential of employing SMAs in RC retrofit, moving further from the traditional concept of plastic deformation. A commonly-used retrofit method, the jacketing of columns is employed, replacing the steel reinforcement with Ni-Ti, Cu-Al-Mn and Cu-Al-Be SMA bars endowed with advanced features. Pushover and non-linear dynamic time-history analysis are conducted on an existing residential building situated in Athens, Greece. Results showed that SMA schemes led to capacity increase, ductility of the retrofitted structure, maximum and residual displacement reduction attributed to their re-centering and energy-dissipation properties. An interesting observation was that low-cost Cu-Al-Mn showed a performance comparable to Ni-Ti scheme indicating that it can constitute a potential cost-effective substitute to expensive Ni-Ti, having a tenth of their cost, favoring their large-scale application towards a re-centering oriented perception to mitigate significant residual deformation. References DesRoches, R., Smith, B., 2004. Shape memory alloys in seismic resistant design and retrofit: a critical review of their potential and limitations. Journal of Earthquake Engineering 8, 3, 415-429. Seismosoft, 2021. SeismoStruct 2021 – A computer program for static and dynamic nonlinear analysis of framed structures. https://seismosoft.com/ Noguez, C.A.C, Saiidi, M.S., 2012. Shake-table studies of a four-span bridge model with advanced materials. Journal of Structural Engineering Asce 138, 2. Saha, S., Debbarma, S., 2014. Behavior of concrete beams reinforced with SMA and steel bars under cyclic and monotonic load. 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