Yakın-fay puls modellerinin yalıtımlı binaların kurşun çekirdek ısınmasına bağlı davranışlarının belirlenmesindeki etkinliği

Yıl 2024, Cilt: 39 Sayı: 1, 243 - 260, 21.08.2023

Zafer Kanbir Hatice Gazi Seda Öncü Davas Cenk Alhan

https://doi.org/10.17341/gazimmfd.1052294

Öz

Yüksek genlikli, uzun periyotlu pulslar içeren yakın-fay depremleri, sismik yalıtımlı binalar için yıkıcı bir potansiyele sahiptir. Tarihi yakın-fay deprem kayıtlarının sayısı kapsamlı çalışmalar için yeterli olmadığından; bu kayıtları simüle etmek için sentetik puls modelleri kullanılabilmektedir. Geliştirilen farklı puls modellerinin etkinliği, sismik yalıtımlı yapılar için araştırılmış; ancak bu çalışmalarda, yakın-fay depremlerindeki etkilerinin önemli düzeylere çıkabildiği bilinen kurşun çekirdek ısınması göz önüne alınmamıştır. Bu çalışmada, puls modellerinin taban yalıtımlı binaların yakın-fay depremleri etkisinde kurşun çekirdek ısınmasına bağlı sismik tepkisini belirlemedeki başarısını araştırmak amacıyla, tarihi yakın-fay depremleri ve sentetik olarak üretilmiş eşdeğer yer hareketi kayıtları etkisinde zaman tanım alanında doğrusal olmayan analizler gerçekleştirilmiştir. Sonuçlar, puls modelleri ile genel davranışın belirlenebilesine karşın kurşun çekirdek ısınmasına bağlı olarak farkların ortaya çıkabileceğini göstermiştir.

Anahtar Kelimeler

Sismik izolasyon, yakın-fay depremi, sentetik puls modeli, kurşun çekirdekli elastomer yalıtım birimi, kurşun çekirdek ısınması.

Effectiveness of near-fault pulse models in determining behavior of isolated buildings based on lead core heating

Öz

Near-fault earthquakes with high amplitude, long-period pulses have a destruction potential for seismically isolated buildings. Since the number of historical near-fault earthquake records is not sufficient for comprehensive studies, synthetic pulse models can be used to simulate these records. The effectiveness of different pulse models has been investigated for seismically isolated structures; however, in these studies lead core heating, which is known to have significant effects in near-fault earthquakes, was not taken into account. In this study, in order to investigate the success of pulse models in determining the seismic response of isolated buildings exhibiting lead core heating under the effect of near-fault earthquakes, nonlinear time history analyses were performed under historical near-fault earthquakes and synthetically produced counterpart ground motion records. The results showed that although general behavior can be determined with pulse models, differences can arise due to lead core heating.

Anahtar Kelimeler

Seismic isolation, near-fault earthquake, synthetic pulse model, lead rubber bearing, lead core heating

Kaynakça

• Heaton, T.H., Hall, J.F., Wald D.J., Halling M.W, Response of high-rise and base-isolated buildings to a hypothetical Mw 7.0 blind thrust earthquake, Science, 267, 206-211, 1995.
• Kalpakidis, I.V., Constantinou, M.C., Effects of Heating on the Behavior of Lead-Rubber Bearings. I: Theory, Journal of Structural Engineering (ASCE), 135(12), 1440-1449, 2009.
• Başaran, E., Bal, İ.E., Kurşun Çekirdekli Kauçuk İzolatörlü Yapılarda Yakın Fay Etkisinin İncelenmesi, 4. Uluslararası Deprem Mühendisliği ve Sismoloji Konferansı, Eskişehir, 2017.
• Rong, Qiang. "Optimum parameters of a five-story building supported by lead-rubber bearings under near-fault ground motions." Journal of Low Frequency Noise, Vibration and Active Control 39(1), 98-113, 2020.
• Kalpakidis, I.V., Constantinou, M.C., Whittaker, A.S., Modeling strength degradation in lead-rubber bearings under earthquake shaking, Earthq. Eng. Struct. Dyn., 39(13), 1533-1549, 2010.
• Özdemir, G., Dicleli, M., Effect of lead core heating on the seismic performance of bridges isolated with LRB in near-fault zones, Earthquake Engineering and Structural Dynamics, 41(14),1989–2007, 2012.
• Özdemir, G., Bayhan, B., Gülkan, P., Variations in the hysteretic behavior of LRBs as a function of applied loading, Structural Engineering and Mechanics, 67(1),69-78, 2018.
• Somerville, P.G., Characterizing near-fault ground motion for the design and evaluation of bridges, Third national conference and workshop on bridges and highways, Portland, Oregon, 2002.
• Kalkan, E., Kunnath, S.K., Effects of fling step and forward directivity on seismic response of buildings., Earthquake spectra, 22(2), 367-390, 2006.
• Yadav, K.K., Gupta, V.K., Near-fault fling-step ground motions: characteristics and simulation, Soil Dynamics and Earthquake Engineering, 101, 90-104, 2017.
• Agrawal, A.K., He, W.L., A closed form approximation of near fault ground motion pulses for flexible structures, 15th ASCE Proceeding of Engineering Mechanics Conference, New York, USA, 2002.
• Somerville, P., Engineering characterization of near fault ground motions, Planning and Engineering for Performance in Earthquakes (2005 NZSEE), Taupo, New Zealand, 2005.
• Tirca, L.D., Foti, D., Diaferio, M., Response of middle-rise steel frames with and without passive dampers to near-field ground motions, Engineering Structures, 25(2), 169-179, 2003.
• Makris, N., Rigidity, plasticity, viscosity: can electrorheological dampers protect base isolated structures from near source ground motions. Earthquake engineering and structural dynamics, 26, 571-591, 1997.
• Makris, N., Chang, S.P., Effect of damping mechanisms on the response of seismically isolated structures (Report No. PEER-1998-06), Pacific Earthquake Engineering Research Center, 1998.
• Burks, L.S., Baker, J.W., A predictive model for fling-step in near-fault ground motions based on recordings and simulations, Soil Dynamics and Earthquake Engineering, 80, 119-126, 2016.
• He, W.L., Agrawal, A.K., An analytical model of ground motion pulses for the design and assessment of smart protective systems, Journal of Structural Engineering (ASCE), 134 (7), 1177-1188, 2008.
• Mukhopadhyay, S., Gupta, V.K., Directivity pulses in near-fault ground motions—II: Estimation of pulse parameters, Soil Dynamics and Earthquake Engineering, 50, 38-52, 2013.
• Öncü-Davas, S., Gazi, H., Güler, E., Alhan, C., Comparison of Ground Motion Pulse Models for the Seismic Response of Seismically Isolated Liquid Storage Tanks, In: Rupakhety R., Ólafsson S. Eds. Earthquake Engineering and Structural Dynamics in Memory of Ragnar Sigbjörnsson, Springer, p.143-157, 2018.
• Dicleli, M., Buddaram, S., Equivalent linear analysis of seismic-isolated bridges subjected to near-fault ground motions with forward rupture directivity effect, Engineering Structures, 29(1), 21-32, 2007.
• Özdemir, G., Dicleli, M., Effect of lead core heating on the seismic performance of bridges isolated with LRB in near-fault zones, Earthquake Engineering and Structural Dynamics, 41(14):1989–2007, 2012.
• Gazi H, Öncü-Davas S, Alhan C. Comparison of Ground Motion Pulse Models for the Drift Response of Seismically Isolated Buildings. In: Sisiopiku VP, Ramadan O.E, Eds., Urban Planning and Civil Engineering. Athens Institute for Education and Research; 2015, p.321-332.
• Öncü-Davas S, Gazi H, Alhan C. Comparison of Ground Motion Pulse Models for the Acceleration Response of Seismically Isolated Buildings. In: Khatip, JM, Eds. Architecture Anthology I: Architectural Construction, Materials and Building Technologies. Athens Institute for Education and Research; 2015, p.229-240.
• Uckan, E., Umut, Ö., Sisman, F. N., Karimzadeh, S., Askan, A., Seismic response of base isolated liquid storage tanks to real and simulated near fault pulse type ground motions, Soil Dynamics and Earthquake Engineering, 112, 58-68, 2018.
• McKenna, F., Fenves, G., Scott. M., OpenSees: Open System for Earthquake Engineering Simulation, Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, 2016, (http://opensees.berkeley.edu).
• Alhan, C., Sürmeli, M., Shear building representations of seismically isolated buildings, Bulletin of Earthquake Engineering, 9(5), 1643-1671, 2011.
• Constantinou, M.C., Whittaker, A.S., Fenz, D.M., Apostolakis, G., Seismic Isolation of Bridges, New York, Report Submitted to the State of California Department of Transportation, University at Buffalo, Version 2, 2007.
• Kanbir, Z., Özdemir, G., Alhan, C., Modeling of Lead Rubber Bearings via 3D-BASIS, SAP2000, and OpenSees Considering Lead Core Heating Modeling Capabilities, International Journal of Structural and Civil Engineering Research, 7(4), 294-301, 2018.
• Park YJ, Wen YK, Ang AHS., Random vibration of hysteretic systems under bi‐directional ground motions. Earthquake engineering & structural dynamics, 14(4):543-557, 1986.
• Mokha AS, Constantinou MC, Reinhorn AM., Verification of friction model of teflon bearings under triaxial load. Journal of Structural Engineering, 119(1):240-261, 1993.
• Kalpakidis, I.V., Constantinou, M.C., Effects of Heating on the Behavior of Lead-Rubber Bearings. II: Verification of theory. , Journal of Structural Engineering (ASCE), 135(12), 1450-1461, 2009.
• Kanbir, Z., Alhan C., Özdemir, G., Influence of Superstructure Modeling Approach on the Response Prediction of Buildings with LRBs Considering Heating Effects, Structures, 28,1756-1773, 2020.
• Schellenberg, A., Yang, T., Kohama, E., OpenSees Navigator: MATLAB based graphical user interface, Pacific Earthquake Engineering Research Center, Berkeley, CA, 2016, (http://openseesnavigator.berkeley.edu).
• Kanbir, Z., Kurşun Çekirdek Isınmasının Sismik İzolasyonlu Yapıların Davranışına Etkisi, Yayımlanmamış Doktora Tezi, İstanbul Üniversitesi-Cerrahpaşa, 2022.
• Kumar, M., Computer Program ElastomericX, LeadRubberX, and HDR: User elements in OpenSees for analysis of elastomeric seismic isolation bearings under extreme loading, OpenSees, Buffalo, NY, 2018, (http://opensees.berkeley.edu/wiki /index.php/LeadRubberX)
• Jangid, R.S., Optimum lead–rubber isolation bearings for near-fault motions, Engineering structures. 29(10), 2503-2513, 2007.
• Newmark, N.M., A method of computation for structural dynamics, Journal of the engineering mechanics division, 85(3), 67-94, 1959.
• Housner, G.W., Trifunac, M.D., Analysis of accelerograms — Parkfield earthquake, Bulletin of the Seismological Society of America, 57(6), 1193–220, 1967.
• Bertero, V.V., Mahin, S.A., Herrera, R.A., Aseismic design implications of nearfault San Fernando earthquake records, Earthquake Engineering and Structural Dynamics, 6, 31– 42, 1978.
• Mavroeidis, G.P., Papageorgiou, A.S., A mathematical representation of near-fault ground motions, Bulletin of the Seismological Society of America. 93(3), 1099-1131, 2003.
• Mavroeidis, G.P., Dong, G., Papageorgiou, A.S., Near‐fault ground motions, and the response of elastic and inelastic single‐degree‐of‐freedom (SDOF) systems, Earthquake Engineering & Structural Dynamics, 33(9), 1023-49, 2004.
• Wang, Y., McFarland, D.M., Vakakis, A.F., Bergman, L.A., Efficacy of a nonlinear base isolation system subjected to near-field earthquake motions.Proc., Int. Conf. on Advances and New Challenges in Earthquake Engineering Research, Harbin, People’s Republic of China, 2002.
• PEER, Pacific earthquake engineering resource center: NGA database, Berkeley: University of California, 2020 (http://peer.berkeley.edu/nga/).
• COSMOS, Strong-Motion Virtual Data Center, 2013 (http://www.cosmos-eq.org/).
• Makris, N., Chang, S., Effect of Viscous, Viscoplastic and Friction Damping on the Response of Seismic Isolated Structures, Earthq Eng Struct Dyn, 29, 85-107, 2000.