Structures close to causative earthquake faults may exhibit substantially different seismic responses than those recorded away from the excitation source. In the near-fault zone, long duration intense velocity pulses can induce unexpected seismic demands on isolated buildings. This study investigates the performance of a five-storey building frame isolated with a shape memory alloy based friction pendulum system (SMA-FPS) under near-fault excitations. The effectiveness of SMA-FPS is quantified by comparing the same isolated structure subjected to a friction pendulum system (FPS). Parametric studies, optimal analysis and numerical simulations are carried out on the structural parameters of the isolation systems. For this, the particle swarm optimization (PSO) method is used to acquire optimal characteristic strengths of SMA-FPS. The transformation strength of SMA and frictional coefficient are selected as two design variables to minimize the top storey acceleration, which is used as the objective function to optimize the seismic reduction efficiency of SMA-FPS system. The optimal seismic response of the structure isolated by SMA-FPS achieves superior performance over FPS under near-fault excitations. Moreover, the study reveals that the optimal SMA-FPS system significantly reduces the bearing displacement as compared to the FPS system. Finally, the computational results are validated with numerical simulation performed in SAP2000 which provides the consistent result.
Pal, S., Roy, B, and Choudhury, S, "Comparative performance study of tuned liquid column ball damper for excessive liquid displacement on response reduction of structure", International Journal of Engineering, Transactions B: Applications, Vol. 33, No. 5, (2020), 753-759, doi: 10.5829/ije.2020.33.05b.06.
Ozturk, B., Cetin, H, and Aydin, E, "Optimum vertical location and design of multiple tuned mass dampers under seismic excitations", EngineeringStructures, (2022), 1141-1163, doi: 10.1016/j.engstruct.2020.110536.
Barkhordari, M, and Tehranizadeh, M, "Ranking passive seismic control systems by their effectiveness in reducing responses of high-Rise buildings with concrete shear walls using multiple-Criteria decision making", International Journal of Engineering, Transactions B: Applications, Vol. 33, No. 8, (2020), 1479-1490, doi: 10.5829/ije.2020.33.08b.06.
Naeim, F, and Kelly, J. M, “Design of seismic isolated structures: from theory to practice”, John Wiley & Sons, (1999), doi: 10.1002/9780470172742.
Basu, B., Bursi, O. S., Casciati, F., Casciati, S., Del Grosso, A. E., Domaneschi, M., Faravelli, L., Holnicki-Szulc, J.,Irschik, H, and Krommer, M, "A European Association for the Control of Structures joint perspective. Recent studies in civil structural control across Europe", Structural Control and Health Monitoring, Vol. 21, No. 12, (2014), 1414-1436, doi: 10.1002/stc.1652.
Buckle, I. G, and Mayes, R. L, "Seismic isolation: history, application, and performance—a world view", Earthquake Spectra, Vol. 6, No. 2, (1990), 161-201, doi: 10.1193/1.1585564.
Hessabi, R. M., Mercan, O, and Ozturk, B, "Exploring the effects of tuned mass dampers on the seismic performance of structures with nonlinear base isolation systems", Earthquakes and Structures, Vol. 12, No. 3, (2017), 285-296, doi: 10.12989/eas.2017.12.3.285.
Zayas, V. A., Low, S. S, and Mahin, S. A, "A simple pendulum technique for achieving seismic isolation", Earthquake Spectra, Vol. 6, No. 2, (1990), 317-333, doi: 10.1193/1.1585573.
Mokha, A., Constantinou, M, and Reinhorn, A, "Teflon bearings in base isolation I: Testing", Journal of Structural Engineering, Vol. 116, No. 2, (1990), 438-454, doi: 10.1061/(ASCE)0733-9445(1990)116:2(438).
Farzam, M. F., Jalali, H. H., Gavgani, S. A. M., Kayabekir, A. E, and Bekdaş, G, "Current trends in the optimization approaches for optimal structural control", Advances in Structural Engineering-Optimization, Vol. 326, (2021), 133-179, doi: 10.1007/978-3-030-61848-3-5.
Castaldo, P, and Ripani, M. "Optimal design of friction pendulum system properties for isolated structures considering different soil conditions", Soil Dynamics and Earthquake Engineering, Vol. 90, (2016), 74-87, doi: 10.1016/j.solidyn.2016.08.025
Ozturk, B. M, “Seismic drift response of building structures in seismically active and near-fault regions”, Purdue University, 2003.
Jangid, R, "Optimum friction pendulum system for near-fault motions", Engineering Structures, Vol. 27, No. 3, (2005), 349-359, doi: 10.1016/j.engstruct.2004.09.013.
Iwan, W. D, "Near-field considerations in specification of seismic design motions for structures" Proceedings of the Tenth European Conference on Earthquake Engineering, Vienna, Austria, August, (1994), 257-267.
Mazza, F, and Vulcano, A, "Effects of near-fault ground motions on the nonlinear dynamic response of base-isolated rc framed buildings", Earthquake Engineering & Structural Dynamics, Vol. 41, No. 2, (2012), 211-232, doi: 10.1002/eqe.1126.
Mazza, F., Vulcano, A, and Mazza, M, "Nonlinear dynamic response of RC buildings with different base isolation systems subjected to horizontal and vertical components of near-fault ground motions", The Open Construction & Building Technology Journal, Vol. 6, No. 1, (2012), doi: 10.2174/1874836801206010373.
Becker, T. C., Bao, Y, and Mahin, S. A, "Extreme behavior in a triple friction pendulum isolated frame", Earthquake Engineering & Structural Dynamics, Vol. 46, No. 15, (2017), 2683-2698, doi: 10.1002/eqe.2924.
Mazza, F, "Lateral-torsional response of base-isolated buildings with curved surface sliding system subjected to near-fault earthquakes", Mechanical Systems and Signal Processing, Vol. 92, (2017), 64-85, doi: 10.1016/j.ymssp.2017.01.025.
Ozbulut, O. E, and Hurlebaus, S, "Seismic assessment of bridge structures isolated by a shape memory alloy/rubber-based isolation system", Smart Materials and Structures, Vol. 20, No. 1, (2010), 015003, doi: 10.1008/0964-1726/20/1/015003.
Rouhbakhsh, D. A, and Sadrnezhad, S, "A 3d micro-plane model for shape memory alloys", International Journal of Engineering, Transactions A: Basics, Vol. 21, No. 1, (2008).
Casciati, F, and Faravelli, L, "A passive control device with SMA components: from the prototype to the model", Structural Control and Health Monitoring, Vol. 16, No. 7-8, (2009), 751-765, doi: 10.1002/stc.328.
Ozbulut, O. E., Hurlebaus, S, and DesRoches, R, "Seismic response control using shape memory alloys: a review", Journal of Intelligent Material Systems and Structures, Vol. 22, No. 14, (2011), 1531-1549, doi: 10.1177/1045389X11411220.
Ozbulut, O. E, and Hurlebaus, S, "A comparative study on the seismic performance of superelastic-friction base isolators against near-field earthquakes", Earthquake Spectra, Vol. 28, No. 3, (2012), 1147-1163, doi: 10.1193/1.4000070.
Gur, S, and Mishra, S. K, "Multi-objective stochastic-structural-optimization of shape-memory-alloy assisted pure-friction bearing for isolating building against random earthquakes", Soil Dynamics and Earthquake Engineering, Vol. 54, (2013), 1-16, doi: 10.1016/j.solidyn.2013.07.013.
Gur, S., Mishra, S. K, and Chakraborty, S, "Performance assessment of buildings isolated by shape-memory-alloy rubber bearing: comparison with elastomeric bearing under near-fault earthquakes", Structural Control and Health Monitoring, Vol. 21, No. 4, (2014), 449-465, doi: 10.1002/stc.1576.
De Domenico, D., Gandelli, E, and Quaglini, V, "Adaptive isolation system combining low-friction sliding pendulum bearings and SMA-based gap dampers", Engineering Structures, Vol. 212, (2020), 110536, doi: 10.1016/j.engstruct.2020.110536.
Castaldo, P., Palazzo, B, and Della Vecchia, P, "Seismic reliability of base-isolated structures with friction pendulum bearings", Engineering Structures, Vol. 95, (2015), 80-93, doi: 10.1016/j.engstruct.2015.03.53.
Dolce, M., Cardone, D, and Marnetto, R, "Implementation and testing of passive control devices based on shape memory alloys", Earthquake Engineering & Structural Dynamics, Vol. 29, No. 7, (2000), 945-968, doi: 10.1002/1096-9845(200007)29:7<945::AID-EQE958>3.0.
Graesser, E, and Cozzarelli, F, "Shape-memory alloys as new materials for aseismic isolation", Journal of Engineering Mechanics, Vol. 117, No. 11, (1991), 2590-2608, doi: 10.1061/(ASCE)0733-9399(1991)117:11(2590).
Wen, Y. K, “Equivalent linearization for hysteretic systems under random excitation”, Journal of Applied Mechanics, Vol. 47, No. 1, (1980), 150-154, doi: 10.1115/1.3153594.
Eberhart, R, and Kennedy, J, "A new optimizer using particle swarm theory", MHS'95. Proceedings of the Sixth International Symposium on Micro Machine and Human Science, (1995), 39-43.
Sreeman, D., & Kumar Roy, B. (2022). Optimization Study of Isolated Building using Shape Memory Alloy with Friction Pendulum System under Near-fault Excitations. International Journal of Engineering, 35(11), 2176-2185. doi: 10.5829/ije.2022.35.11b.12
D. Sreeman; B. Kumar Roy. "Optimization Study of Isolated Building using Shape Memory Alloy with Friction Pendulum System under Near-fault Excitations". International Journal of Engineering, 35, 11, 2022, 2176-2185. doi: 10.5829/ije.2022.35.11b.12
Sreeman, D., Kumar Roy, B. (2022). 'Optimization Study of Isolated Building using Shape Memory Alloy with Friction Pendulum System under Near-fault Excitations', International Journal of Engineering, 35(11), pp. 2176-2185. doi: 10.5829/ije.2022.35.11b.12
Sreeman, D., Kumar Roy, B. Optimization Study of Isolated Building using Shape Memory Alloy with Friction Pendulum System under Near-fault Excitations. International Journal of Engineering, 2022; 35(11): 2176-2185. doi: 10.5829/ije.2022.35.11b.12