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Fragility curves for the typical multi-span simply supported bridges in northern Pakistan

  • Waseem, Muhammad (National Centre of Excellence in Geology, University of Peshawar) ;
  • Spacone, Enrico (Department of Engineering and Geology, University of Chieti-Pescara)
  • Received : 2017.04.28
  • Accepted : 2017.07.27
  • Published : 2017.10.25

Abstract

Bridges are lifeline and integral components of transportation system that are susceptible to seismic actions, their vulnerability assessment is essential for seismic risk assessment and mitigation. The vulnerability assessment of bridges common in Pakistan is very important as it is seismically very active region and the available code for the seismic design of bridges is obsolete. This research presents seismic vulnerability assessment of three real case simply supported multi-span reinforced concrete bridges commonly found in northern Pakistan, having one, two and three bents with circular piers. The vulnerability assessment is carried through the non-linear dynamic time history analyses for the derivation of fragility curves. Finite element based numerical models of the bridges were developed in MIDAS CIVIL (2015) and analyzed through with non-linear dynamic and incremental dynamic analyses, using a suite of bridge-specific natural spectrum compatible ground motion records. Seismic responses of shear key, bearing pad, expansion joint and pier components of each bridges were recorded during analysis and retrieved for performance based analysis. Fragility curves were developed for the bearing pads, shear key, expansion joint and pier of the bridges that first reach ultimate limit state. Dynamic analysis and the derived fragility curves show that ultimate limit state of bearing pads, shear keys and expansion joints of the bridges exceed first, followed by the piers ultimate limit state for all the three bridges. Mean collapse capacities computed for all the components indicated that bearing pads, expansion joints, and shear keys exceed the ultimate limit state at lowest seismic intensities.

Keywords

References

  1. AASTHO-LRFD (2012), Bridge Design and Specifications, Washington, D. C., American Association of State and Highway Transportation Officials.
  2. Ahmad, N., Ali, Q. and Umar, M. (2012a), "Simplified engineering tools for seismic analysis and design of traditional Dhajji-Dewari structures", Bull. Earthq. Eng., 10(5), 1503-1534. https://doi.org/10.1007/s10518-012-9364-9
  3. Ahmad, N., Ali, Q. and Umar, M. (2013), "Seismic vulnerability assessment of multistorey timber braced frame traditional masonry structures", Adv. Mater. Res., 601, 168-172.
  4. Ahmad, N., Ali, Q., Ashraf, M., Alam, B. and Naeem, A. (2012b), "Seismic vulnerability of the Himalayan half-dressed rubble stone masonry structures, experimental and analytical studies", Nat. Hazard. Earth Syst. Sci., 12(11), 3441-3454. https://doi.org/10.5194/nhess-12-3441-2012
  5. Ahmad, N., Ali, Q., Crowley, H. and Pinho, R. (2014), "Earthquake loss estimation of residential buildings in Pakistan", Nat. Hazard., 73(3), 1889-1955. https://doi.org/10.1007/s11069-014-1174-8
  6. Ali, S.M. (2009), "A study on energy dissipation of RC bridge column under seismic demand", Ph.D. Dissertation, University of Engineering and Technology. Peshawar.
  7. Ali, S.M., Khan A.N., Rahman, S. and Reinhorn, A.M. (2011), "A survey of damages to bridges in Pakistan after the major earthquake of 8 October 2005", Earthq. Spectra, 27(4), 947-970. https://doi.org/10.1193/1.3650477
  8. Ali, S.M., Rahaman, S., Shakal, A. and Khan, A.N. (2008), "Establishment of strong motion instrumentation program and shake table test on reinforced concrete bridge column", J. Himalayan Earth Sci., 41, 61-69.
  9. Aviram, A., Mackie, R.K. and Stojadinovic, B. (2008), "Guidelines for non-linear analysis of bridge structures in California", Research Report no. UCB/2008 (03); Pacific Earthquake Engineering Research Centre.
  10. Avsar, O. and Yakut, A. (2012), "Seismic vulnerability assessment criteria for RC ordinary highway bridges in Turkey", Struct. Eng. Mech., 43(1), 127-145. https://doi.org/10.12989/sem.2012.43.1.127
  11. Bilham, R. (2004), "Earthquakes in India and in the himalaya: tectonic, geodesy, and history", Ann. Geophys., 47, 839-858.
  12. Building Code of Pakistan (1986), Seismic provisions for building code of Pakistan, Ministry of Housing and Works, Government of Pakistan, Islamabad, Pakistan.
  13. Building Code of Pakistan (2007), Seismic provisions for building code of Pakistan, Ministry of Housing and Works, Government of Pakistan, Islamabad, Pakistan.
  14. Cardone, D., Perrone, G. and Sofia, S. (2011), "A performance based adaptive methodology for the seismic evaluation of multispan simply supported deck bridges", Bull. Earthq. Eng., 9(5), 1463-1498. https://doi.org/10.1007/s10518-011-9260-8
  15. Choi, E., DesRoches, R. and Nielson, B. (2004), "Seismic fragility of typical bridges in moderate seismic zones", Eng. Struct., 26(2), 187-199. https://doi.org/10.1016/j.engstruct.2003.09.006
  16. Der Kiureghian, A. (2005), First- and Second-order Reliability Methods, Nikolaidis, E., Ghiocel, D.M., Singhal, S. Engineering Design Reliability Handbook, CRC Press LLC, Chapter 14.
  17. EC-8 (2003), Eurocode 8: Design of structures for earthquake resistance-Part 1: general rules, seismic actions and rules for buildings, European committee for standardization, Brussels, Belgium.
  18. Estimated population of Pakistan (2015), Pakistan Economic Survey Report (PESR), Ministry of Finance, Government of Pakistan.
  19. FEMA 356 (2000), Prestandard and commentary for the seismic rehabilitation of buildings, Federal Emergency Management Agency, Washington, D.C., USA.
  20. Filippou, F.C., Popov, E.P. and Bertero, V.V. (1983), "Effects of Bond Deterioration on Hysteretic Behavior of Reinforced Concrete Joints", Report no. EERC 83-19; Earthquake Engineering Research Center, University of California, Berkeley
  21. Hashash, M.A.Y., Byungmin, K., Olson, S.M. and Ahmad, I. (2012), "Seismic hazard analysis using discrete faults in northwestern Pakistan: Part II-results of seismic hazard analysis", J. Earthq. Eng., 16(8), 1161-1183. https://doi.org/10.1080/13632469.2012.681424
  22. Iqbal, M., Khan, Q.U.Z., Ali, S.M. and Alam, B. (2012), "Seismic capacity of retrofitted low-strength bridge piers", J. Eng. Appl. Sci., 31(1), 13-24.
  23. Khan, Q.U.Z., Fiaz, T,M., Ahmed, A. and Iqbal, M. (2015), "Seismic evaluation of repaired and retrofitted circular bridge piers of low-strength concrete", Arab. J. Sci. Eng., 40(11), 3057-3066. https://doi.org/10.1007/s13369-015-1769-8
  24. Khan, R.A., Mukesh, K., Ahmed, M., Rafi, M.M. and Lohi, S.H. (2015), "Earthquake damage assessment of bridges in Karachi", NED J. Res. Struct. Mech., 22(3), 45-67.
  25. Kircher, A.C., Nasser, A.A., Kustu, O. and Holmes, T.W. (1997), "Development of building damage functions for earthquake loss estimation", Earthq. Spectra, 13(4), 663-682. https://doi.org/10.1193/1.1585974
  26. Mander, J., Priestley, M. and Park, R. (1988), "Theoretical stressstrain model for confined concrete", J. Struct. Eng., Am. Soc. Civil Eng., 114, 1804-1826.
  27. Menegotto, M. and Pinto, P.E. (1973), "Method of analysis of cyclically loaded RC plane frames including changes in geometry and non-elastic behavior of elements under normal force and bending", Report no. IABSE.
  28. MIDAS CIVIL (2015), Integrated Solution System for Bridges and Civil Engineering, MIDAS Engineering Software. http://en.midasuser.com.
  29. Mirza, O., Kaewunruen, S. and Galia, G. (2016), "Seismic vulnerability analysis of Bankstown's West Terrace railway bridge", Struct. Eng. Mech., 57(3), 569-585. https://doi.org/10.12989/sem.2016.57.3.569
  30. Monalisa, Khwaja, A.A. and Jan, M.Q. (2007), "Seismic hazard assessment of NW Himalayan thrust and fold belt, Pakistan, using probabilistic approach", J. Earthq. Eng., 11(2), 257-301. https://doi.org/10.1080/13632460601031243
  31. Mosleh, A., Razzaghi, S.M., Jara, J. and Varum, H. (2016), "Development of fragility curves for RC bridges subjected to reverse and strike-slip Seismic sources", Earthq. Struct., 11(3), 517-538. https://doi.org/10.12989/eas.2016.11.3.517
  32. Nielson, G.B. (2005), "Analytical fragility curves for highway bridges in moderate seismic zone", Ph.D. Dissertation, School of Civil and Environmental Engineering. Georgia Institute of Technology, USA.
  33. Priestley, M.J.N., Seible, F. and Calvi, G.M. (1996), Seismic Design and Retrofit of Bridges, John Wiley & Sons, Inc., New York, USA.
  34. Rafi, Z., Lindholm, C., Bungum, H., Laghari, A. and Ahmed, N. (2012), "Probabilistic seismic hazard map of Pakistan, Azad Jammu and Kashmir", Nat. Hazard., 61(3), 1317-1354. https://doi.org/10.1007/s11069-011-9984-4
  35. Rossetto, T. and Peiris, N. (2009), "Observations of damage Kashmir earthquake of October, 8, 2005 and study of the current seismic provisions for buildings in Pakistan", Bull. Earthq. Eng., 7(3), 681-699. https://doi.org/10.1007/s10518-009-9118-5
  36. Saeed, H.Z., Khan, Q.U.Z., Ahmed, A., Ali, S.M., Iqbal, M. (2015), "Experimental and finite element investigation of strengthened LSC bridge piers under quasi-static cyclic load test", Compos. Struct., 131, 556-564. https://doi.org/10.1016/j.compstruct.2015.06.013
  37. Seismic Design Criteria (SDC), CALTRANS specifications (2006), California state department for transportation, 1.4, California.
  38. SeismoMatch (2014), An application capable of adjusting earthquake accelerograms to a target response spectrum, version 2.1.4, Earthquake Engineering Software Solutions, Pavia, Italy. http://www.seismosoft.com/seismomatch.
  39. Spacone, E., Filippou, F.C. and Taucer, F.F. (1996), "Fiber beamcolumn model for non-linear analysis of R/C Frames: Part I. Formulation", Earthq. Eng. Struct. Dyn., 25(7), 711-725. https://doi.org/10.1002/(SICI)1096-9845(199607)25:7<711::AID-EQE576>3.0.CO;2-9
  40. Stefanidou, P.S. and Kappos, J.A. (2016), "Methodology for the development of bridge-specific fragility curves", J. Earthq. Eng. Struct. Dyn., 46(1), 73-93.
  41. Tavares, D.H., Padgeit, J.E. and Paultre, P. (2012), "Fragility curves of typical as built bridges in eastern Canada", Eng. Struct., 40, 107-118. https://doi.org/10.1016/j.engstruct.2012.02.019
  42. Tortolini, P., Marcantonio, P.R., Petrangeli, M. and Lupoi, A. (2011), "Criteri per la verifica e la sostituzione degli appoggi in neoprene di viadotti esistenti in zona sismica", Proceedings of the 14th ANIDIS Conference, Bari, Italy.
  43. Vamvatsikos, D. and Cornell, C.A. (2002), "Incremental dynamic analysis", Earthq. Eng. Struct. Dyn., 31, 491-514. https://doi.org/10.1002/eqe.141
  44. Waseem, M. (2016), "Seismic hazard and vulnerability assessment of reinforced concrete bridges in northern Pakistan", Ph.D Dissertation, Department of Engineering and Geology, University of Chieti-Pescara, Italy.
  45. Yazdani, N., Eddy, S. and Cai, S.C. (2000), "Effect of bearing pads on precast pre-stressed concrete bridges", J. Bridge Eng., ASCE, 224-232.
  46. Zaman, S., Ornthammarath, T. and Warnitchai, P. (2012), "Probabilistic seismic hazard maps for Pakistan", Proceeding of 15th World Conference on Earthquake Engineering, Lisbon, Portugal.

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