Seismic Behavior Factors of Steel Frames Braced with Viscoelastic Damping System

Besan Alagawani, Yousef Harb Alqaryouti

Abstract


In this study a number of seismic behavior factors (overall ductility, response modification, and overstrength) of ordinary moment steel frames with viscoelastic bracing system were evaluated. These factors are not provided for ordinary moment steel frames with viscoelastic bracing system in building seismic codes such as the International Building Code (IBC) or Euro Code (EN). Moreover, similar frames without viscoelastic bracing were assessed and compared as well. A linear history analysis both two types with a different number of stories and span lengths was carried out using different earthquake records, which were selected to include variability in ground motion characteristics. Pushover analysis was then performed after defining the sizes of the elements and assigning material nonlinearity to the discrete hinge where plastic rotation occurs to beams and columns according to FEMA 356. Such analysis allows evaluating the overall ductility and the overstrength of each building of concern by using the yield and ultimate displacements and base shear forces obtained from the pushover curve. The results showed that overall ductility, overstrength, and response modification decreased with an increase of the number of stories for all buildings or when the bay length increased. Adding viscoelastic dampers increased the seismic behavior factors for all buildings significantly.


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References


McGuire, R.K., Probabilistic Seismic Hazard Analysis: Early History, Earthquake Engineering & Structural Dynamics, 37(3), pp. 329-338, 2008.

Marko, J., Influence of Damping Systems on Building Structures Subject to Seismic Effect, Journal of Structural Engineering, 26(13), pp. 1939-1956, 2006.

Elnashai, A.S., & Di Sarno, L., Fundamentals of Earthquake Engineering, Chichester, West Sussex, United Kingdom: John Wiley & Sons Ltd, 2008.

Brookshire, D.S., Chang, S.E., Cochrane, H., Olson, R.A., Rose A., & Steenson, J., Direct and Indirect Economic Losses from Earthquake Damage, Earthquake Spectra, 13(4), pp. 683-701, 1997.

Pelling, M., The Vulnerability of Cities: Natural Disasters and Social Resilience, Earthscan, 2012.

Armouti, N., Effect of Dampers on Seismic Demand of Short Period Structures, Jordan Journal of Civil Engineering, 4(4), pp. 367-377, 2010.

Dhalla K., & Winter, G., Steel Ductility Measurements, Journal of the Structural Division, 100(2), pp. 427-444, 1974.

Clough R., & Penzien, J., Dynamics of Structures, New York: McGraw Hill, 1993.

Armouti, N., Earthquake Engineering: Theory and Implementation, ed. 2, United States of America: International Code Council, 2008.

Newmark, N.M. & Hall, W. J., Procedures and Criteria for Earthquake Resist and Design, In Selected Papers by Nathan M. Newmark@ sCivil Engineering Classics, pp. 829-872, 1973.

Kelly, T.E., Design Guidelines of In-Structure Damping and Energy Dissipation, Holmes Consulting Group, Wellington, New Zealand, 2001.

SEAOC, Recommended Lateral Force Requirements and Tentative Commentary, Structural Engineers Association of California, California 1992.

Nagarajaiah, S. & Narasimhan, S., Seismic Control of Smart Base Isolated Buildings with New Semi Active Variable Damper, Earthquake Engineering and Structural Dynamics, 26(6), pp. 729-749, 2007.

Barakat, S.A., Malkawi, A.I.H., & Al-Shatnawi, A.S., A Step Towards Evaluation of the Seismic Response Reduction Factor in Multistorey Reinforced Concrete Frames, Natural Hazards, 16(1), pp. 65-80, 1997.

SANZ, New Zealand Standard Code of Practice for General Structural Design and Design Loadings for Buildings, Standards Association of New Zealand, New Zealand, 1992.

Armouti, N., Effect of Dampers on Seismic Demand of Short Period Structures in Rock Sites, Jordan Journal of Civil Engineering, 5(2), pp. 216-228, 2011.

Samali, B. & Kwok, K.C.S., Use of Viscoelastic Dampers in Reducing Wind- and Earthquake-Induced Motion of Building Structures, Engineering Structures, 17(9), pp. 639-654, 1995.

Tezcan, S.S. & Uluca, O., Reduction of Earthquake Response of Plane Frame Buildings by Viscoelastic Dampers, Engineering Structures, 25(14), pp. 1755-1761, 2003.

Sabetahd, R. & Zandi, Y., Evaluation Performance of Viscoelastic Dampers in Reduction Seismic Base Shear of Structures using Nonlinear Dynamic Analysis, American Journal of Scientific Research, 43, pp. 58-67, 2012.

Pollini, N., Lavan, O. & Amir, O., Towards Realistic Minimum-cost Optimization of Viscous Fluid Dampers for Seismic Retrofitting, Bulletin of Earthquake Engineering, 14(3), pp. 971-998, 2016.

Abdi, H., Hejazi, F., Saifulnaz, R., Karim, I.A. & Jaafar, M.S., Response Modification Factor for Steel Structure Equipped with Viscous Damper Device, International Journal of Steel Structures, 15(3), pp. 605-622, 2015.

Newmark N.M. & Hall, W.J., Earthquake Spectra and Design, Earth System Dynamics, 1, 1982.

Park, R. & Paulay, T., Reinforced Concrete Structures, New York: John Wiley & Sons Inc., 1975.

Golubka, N.C. & Simeonov, B., Computer Program for Determination of Strength and Deformability Characteristics (RESIST), Institute of Earthquake Engineering and Engineering Seismology University, Skopje, Macedonia, 1993.

Mahmoudi, M. & Abdi, M.G., Evaluating Response Modification Factors of TADAS Frames, Journal of Constructional Steel Research, 71, pp. 162-170, 2012.

AISC Committee, Specification for Structural Steel Buildings (ANSI/AISC 360-10), American Institute of Steel Construction, Chicago-Illinois, 2010.

CSI Structural Analysis Program, ETABS 2013, Computers and Structures Inc., Berkeley, California, 2013.

ASCE7, Minimum Design Loads for Buildings and Other Structures, American Society of Civil Engineers, Virginia, 2010.

FEMA, NEHRP Recommended Provisions for the Development of Seismic Regulations for New Buildings, Part 1 Provisions, Federal Emergency Management Agency, Washington, 1997.

Al-Qaryouti, Y., Evaluating Seismic Response Modification Factor of Reinforced Concrete Frames with Viscoelastic Damping System, M.Sc. dissertation, Civil Engineering Department, The University of Jordan, 2014.

Alagawani, B., & Al-Qaryouti, Y., Evaluating Overall Ductility Factor of Steel Frames with Viscoelastic Bracing System, Journal of Engineering Science and Technology Review, 9(4), pp. 128-137, 2016.




DOI: http://dx.doi.org/10.5614%2Fj.eng.technol.sci.2016.48.6.6

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