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Effect of behavioral parameters of base isolators on the seismic response of the bridge to near-fault ground motions | ||
| AUT Journal of Civil Engineering | ||
| مقاله 2، دوره 4، شماره 3، آذر 2020، صفحه 277-288 اصل مقاله (1.73 M) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22060/ajce.2019.15899.5554 | ||
| نویسندگان | ||
| Abbas Keramati1؛ Gholam Reza Nouri* 2 | ||
| 1Kharazmi university, Tehran, Iran. | ||
| 2Faculty of Engineering, Kharazmi University,Tehran, Iran. | ||
| چکیده | ||
| The current study examined the effectiveness of considering the nonlinear behavior of lead rubber bearings (LRBs) on the response of seismically isolated bridges. Also, the effect of the vertical component of the strong ground motion on the critical buckling capacity of LRBs was studied. 3D modeling of a seismically isolated bridge with nonlinear time history analysis under near-fault ground motion was applied. The results showed lack of consideration of the cavitation, post-cavitation and strength degradation behavior in tension and force softening under compression produces a large axial force and small axial displacement in LRBs and axial force-deformation appears to be perfectly linear. The results revealed that the average maximum base shear force in the bridge piers increased by 116% and 29.8% in the longitudinal and transverse direction respectively in comparison with the simple modeling. It also increased the average maximum displacement of bridge pier about 113% in the longitudinal direction and 31% in the transverse direction. Simplifying the LRBs modeling led to produces smaller stress and base shear forces of the bridge columns relative to actual conditions. Since the AASHTO regulation requires a seismically isolated bridge substructure to remain in the linear range, so in the bridges with a simplified model of LRBs, the nonlinear behavior of some columns of isolated bridges will be ignored under strong near-fault ground motion. | ||
| کلیدواژهها | ||
| Seismic isolation؛ Lead-rubber bearing؛ Nonlinear behaviour؛ Bridge؛ Near-fault ground motions | ||
| مراجع | ||
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[1] M. Saiidi, E. Maragakis, G. Griffin, Effect of base isolation on the seismic response of multi-column bridges, Structural Engineering and Mechanics, 8(4) (1999) 411-419. [2] M. Kumar, A.S. Whittaker, M.C. Constantinou, An advanced numerical model of elastomeric seismic isolation bearings, Earthquake Engineering & Structural Dynamics, 43(13) (2014) 1955-1974. [3] I. Buckle, S. Nagarajaiah, K. Ferrell, Stability of elastomeric isolation bearings: Experimental study, Journal of Structural Engineering, 128(1) (2002) 3-11. [4] C.G. Koh, J.M. Kelly, Effects of axial load on elastomeric isolation bearings, (1987). [5] M. Kumar, A.S. Whittaker, M.C. Constantinou, Experimental investigation of cavitation in elastomeric seismic isolation bearings, Engineering Structures, 101 (2015) 290-305. [6] K. Ishii, M. Kikuchi, T. Nishimura, C.J. Black, Coupling behavior of shear deformation and end rotation of elastomeric seismic isolation bearings, Earthquake engineering & structural dynamics, 46(4) (2017) 677-694. [7] K. Ishii, M. Kikuchi, Improved numerical analysis for ultimate behavior of elastomeric seismic isolation bearings, Earthquake Engineering & Structural Dynamics, 48(1) (2019) 65-77. [8] C.-y. Shen, P. Tan, J. Cui, Y.-h. Ma, X.-y. Huang, Critical tension–shear load of elastomeric seismic isolators: An experimental perspective, Engineering Structures, 121 (2016) 42-51. [9] Z. Zhang, X. Liu, Y. Peng, Improved nonlinear rotational constitutive law for predicting critical loads in elastomeric isolation bearings, Construction and Building Materials, 211 (2019) 150-158. [10]A. Elgamal, L. He, Vertical earthquake ground motion records: an overview, Journal of Earthquake Engineering, 8(05) (2004) 663-697. [11]W. Silva, Characteristics of vertical strong ground motions for applications to engineering design, 1088-3800, 1997. [12]M. Eröz, R. DesRoches, A comparative assessment of sliding and elastomeric seismic isolation in a typical multi-span bridge, Journal of Earthquake Engineering, 17(5) (2013) 637-657. [13]G.P. Warn, A.S. Whittaker, Vertical earthquake loads on seismic isolation systems in bridges, Journal of structural engineering, 134(11) (2008) 1696-1704. [14]M.R. Button, C.J. Cronin, R.L. Mayes, Effect of vertical motions on seismic response of highway bridges, Journal of structural engineering, 128(12) (2002) 1551-1564. [15] S. Chen, T. Wang, W. Yan, Z. Zhang, K.-S. Kim, Theoretical tensile model and cracking performance analysis of laminated rubber bearings under tensile loading, Structural Engineering and Mechanics, 52(1) (2014) 75- 87. [16]B. Olmos, J. Roesset, Effects of the nonlinear behavior of lead-rubber bearings on the seismic response of bridges, Earthquakes and Structures, 1(2) (2010) 215-230 [17]A. Aviram, K.R. Mackie, B. Stojadinović, Guidelines for nonlinear analysis of bridge structures in California, Pacific Earthquake Engineering Research Center, 2008. [18] S. Mazzoni, F. McKenna, M.H. Scott, G.L. Fenves, The open system for earthquake engineering simulation (OpenSEES) user command[1]language manual, (2006). [19]K.L. Ryan, B. Richins, Design, Analysis, and Seismic Performance of a Hypothetical Seismically Isolated Bridge on Legacy Highway, Utah Department of Transportation, 2011. [20]I. Buckle, M. Al-Ani, E. Monzon, Seismic isolation design examples of highway bridges, NCHRP Project, (2011) 20-27. [21]G.P. Warn, A.S. Whittaker, A study of the coupled horizontal-vertical behavior of elastomeric and lead-rubber seismic isolation bearings, No. MCEER-06-0011. Multidisciplinary Center for Earthquake Engineering Research, 2006. [22]AASHTO, Guide specifications for seismic isolation design, American Association of State Highway and Transportation Officials , 2010. [23]V&V ASME , Guide for verification and validation in computational solid mechanics, American Society of Mechanical Engineers, 2006. [24]G.P. Warn, The coupled horizontal-vertical response of elastomeric and lead-rubber seismic isolation bearings, State University of New York at Buffalo, 2006. [25]J.M. Kelly, Earthquake-resistant design with rubber, (1993). [26]X. Han, C.A. Kelleher, G.P. Warn, T. Wagener, Identification of the controlling mechanism for predicting critical loads in elastomeric bearings, Journal of Structural Engineering, 139(12) (2013) 04013016. [27]I.G. Buckle, Stability of elastomeric seismic isolation systems, in: Proc. of Seminar on Seismic Isolation, Passive Energy Dissipation and Control, 1993, Applied Technology Council, 1993. [28]G.P. Warn, A.S. Whittaker, M.C. Constantinou, Vertical stiffness of elastomeric and lead–rubber seismic isolation bearings, Journal of Structural Engineering, 133(9) (2007) 1227-1236. [29]J. Weisman, G.P. Warn, Stability of elastomeric and lead-rubber seismic isolation bearings, Journal of Structural Engineering, 138(2) (2011) 215- 223. [30]J. Sanchez, A. Masroor, G. Mosqueda, K. Ryan, Static and dynamic stability of elastomeric bearings for seismic protection of structures, Journal of structural engineering, 139(7) (2012) 1149-1159. [31]M. Constantinou, A. Mokha, A. Reinhorn, Teflon bearings in base isolation II: Modeling, Journal of Structural Engineering, 116(2) (1990) 455-474. [32]A. Mokha, M. Constantinou, A. Reinhorn, Teflon bearings in base isolation I: Testing, Journal of Structural Engineering, 116(2) (1990) 438- 454. [33]H. Ounis, A. Ounis, Effect Of The Damping Of The LRB System On The Dynamic Response Of A Base Isolated Building, in: Turkish Conference on Earthquake Engineering and Seismology–TDMSK, Antakya, Hatay/ Turkey, 2013. | ||
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