Browse > Article
http://dx.doi.org/10.12989/cac.2012.10.5.435

Determination of plastic hinge properties for static nonlinear analysis of FRP-strengthened circular columns in bridges  

Amiri, Gholamreza Ghodrati (Center of Excellence for Fundamental Studies in Structural Engineering, School of Civil Engineering, Iran University of Science & Technology)
Jahromi, Azadeh Jaberi (School of Civil Engineering, Iran University of Science & Technology)
Mohebi, Benyamin (Department of Civil engineering, Faculty of Engineering, Imam Khomeini International University)
Publication Information
Computers and Concrete / v.10, no.5, 2012 , pp. 435-455 More about this Journal
Abstract
In the recent years, rehabilitation of structures, strengthening and increasing the ductility of them under seismic loads have become so vital that many studies has been carried out on the retrofit of steel and concrete members so far. Bridge piers are very important members concerning rehabilitation, in which the plastic hinging zone is very vulnerable. Pier is usually confined by special stirrups predicted in the design procedure; moreover, fiber-reinforced polymers (FRP) jackets are used after construction to confine the pier. FRP wrapping of the piers is one of the most effective ways of increasing moment and ductility capacity of them, which has a growing application due to its relative advantages. In many earthquake-resistant bridges, reinforced concrete columns have a major defect which could be retrofitted in different ways like using FRP. After rehabilitation, it is important to check the strengthening adequacy by dynamic nonlinear analysis and precise modeling of material properties. If the plastic hinge properties are simplified for the strengthened members, as the simplified properties which FEMA 356 proposes for non-strengthened members, static nonlinear analysis could be performed more easily. Current paper involves this matter and it is intended to determine the plastic hinge properties for static nonlinear analysis of the FRP-strengthened circular columns.
Keywords
plastic hinge; pushover analysis; finite element model; FRP; Ansys;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 FEMA 356 (2000), NEHRP Recommended provisions for the seismic rehabilitation of buildings.
2 FEMA 440 (2005), NEHRP Recommended provisions for the improvement of nonlinear static seismic analysis procedures.
3 FHWA (1995), Seismic retrofit manual for highway bridges, Publication No. FHWA/RD-052, McLean, VA.
4 Hoshikuma, J., Kawashima, K., Nagaya, K. and Taylor, W. (1997), "Stress-strain model for confined reinforced concrete in bridge piers", J. Struct. Eng.-ASCE, 123(5), 624-633.   DOI   ScienceOn
5 Inel, M. and Ozmen, H.B. (2006), "Effect of plastic hinge properties in nonlinear analysis of reinforced concrete buildings", Eng. Struct., 28(11), 1494-1502.   DOI   ScienceOn
6 Karbhari, V.M. and Gao, Y. (1997), "Composite jacketed concrete under uniaxial compression _Verification of simple design equations", J. Mater. Civil Eng., 9(4), 185-193.   DOI   ScienceOn
7 Lee, J. and Fenves, G.L. (1998), "Plastic-damage model for cyclic loading of concrete structures", J. Eng. Mech., 124(8), 892-900.   DOI   ScienceOn
8 Li, Y.F., Lin, C.T. and Sung, Y.Y. (2003), "A constitutive model for concrete confined with carbon fiber reinforced plastics", Mech. Mater., 35(3-6), 603-619.   DOI   ScienceOn
9 Li, Y.F. and Fang, T.S. (2004), "A constitutive model for concrete confined by steel reinforcement and carbon fiber reinforced plastic sheet", Struct. Eng. Mech., 18(1), 21-40.   DOI
10 Li, Y.F. and Sung, Y.Y. (2004), "A study on the sheer-failure of circular sectioned bridge column retrofitted by using CFRP jacketing", J. Reinf. Plast. Comp., 23(8), 811-830.   DOI   ScienceOn
11 Mander, J.B., Priestley, M.J.N. and Park, R. (1988), "Theoretical stress-strain model for confined concrete", J. Struct. Eng.-ASCE, 114(8), 1804-1826.   DOI   ScienceOn
12 Mirmiran, A., Zagers, K. and Yuan, W. (2000), "Nonlinear finite element modeling of concrete confined by fiber composites", Finite Elem. Anal. Des., 35(1), 79-96.   DOI   ScienceOn
13 Mirmiran, A. and Shahawy, M. (1997), "Behavior of concrete columns confined by fiber composites", J. Struct. Eng.-ASCE, 123(5), 583-590.   DOI   ScienceOn
14 Perera, R. (2006), "A numerical model to study the seismic retrofit of RC columns with advances Composite Jacketing", Compos. Part B.-Eng., 37(4-5), 337-345.   DOI   ScienceOn
15 Saatcioglu, M. and Razvi, S. (1992), "Strength and ductility of confined concrete", J. Struct. Div.-ASCE, 118(6), 1590-1607.   DOI
16 Saafi, M., Toutanji, H. and Li, Z. (1999), "Behavior of concrete columns confined with reinforced polymer tubes", ACI Mater. J., 96(4), 500-509.
17 Samaan, M., Mirmiran, A. and Shahawy, M. (1998), "Model of concrete confined by fiber composites", J. Struct. Eng.-ASCE, 124(9), 1025-1031.   DOI   ScienceOn
18 Sarrazin, J. (2004), A Comparative analysis of seismic retrofit techniques for reinforced concrete bridge columns, PHD Thesis, University of Ottawa, Canada.
19 Shahawy, M., Mirmiran, A. and Beitelman, T. (2000), "Tests and modeling of carbon wrapped concrete columns", Compos. Part B.-Eng., 31(6-7), 471-480.   DOI   ScienceOn
20 Sheikh, S.A. and Uzumeri, S.M. (1980), "AnalytIcal model for concrete confinement in tied columns", J. Struct. Div.-ASCE, 108(12), 2073-2722.
21 Syngros, C., Mylonakis, G. and Gazetas, G. (2004), "Geotechnical effects in the collapse of Fukae (Hanshin Expressway) Bridge, Kobe, 1995", Yegian, M.K., and Kavazanjian, E., - Editors, July 27-31, 2004 Los Angeles, California, USA, Geotechnical Engineering for Transportation Projects (GPS No. 126) 2004 ASC.
22 Toutanji, H. (1999), "Stress-strain characteristics of concrete columns externally confined with advances fiber Composite sheets", ACI Mater. J., 96(3), 397-404.
23 Vistaps, M. Karbhari (2004), "Fiber reinforced composite bridge system - transition from the laboratory to the field", Compos. Struct., 66(1-4), 5-16.   DOI   ScienceOn
24 Wakabayashi, M. (1986), Design of earthquake-resistant buildings, McGraw Hill: New York.
25 ACI Committee 440 (2000), Guide for the design and construction of externally bounded FRP systems for strengthening concrete structures, ACI Code, Reported by ACI Committee 440.
26 Xiao, Y. and Wu, H. (2000), "Compressive behavior of concrete confined by carbon fiber Composite jackets", J. Mater. Civil Eng., 12(2), 139-146.   DOI   ScienceOn
27 Youssef, M.N. (2003), Stress-strain model for concrete confined by FRP composites, PHD Thesis, University of California, Irvine.
28 AASHTO (2002), Standard specification for highway bridges, 17th Edition, American Association of State Highway and Transportation Officials, Washington D.C.
29 ANSYS Standard Users Manual Help, Ver.11 and ANSYS Structural Nonlinearities Manual.
30 ACI Committee 440 (1996), State-of-the-art report on FRP for concrete structures(ACI 440R-96), Manual of Concrete Practice, American Concrete Institute, Farmington with Hills, Michigan, 68.
31 ATC40 (1997), Seismic evaluation and retrofit of concrete buildings.
32 Bank, L.C. (2006), Composites for construction, structural design with FRP materials, John Wiley and Sons Inc, Hobokel, New Jersey, Canada.
33 Challal, O., Hassan, M. and Shahawy, M. (2003), "Confinement model for axially loaded short rectangular columns strengthened with fiber reinforced polymer wrapping", ACI Struct. J., 100(2), 215-221.
34 Chen, W.F. (1994), Constitutive equations for engineering materials, Elsevier Science, 2(1), 1096.
35 Fam, A.Z. and Rizkalla, S.H. (2001), "Confinement model for axially loaded concrete confined by circular fiber reinforced polymer tubes", ACI Struct. J., 98(4), 451-461.
36 Fardis, M.N. and Khalili, H. (1981), "Concrete encased in fiberglass reinforced plastic", ACI J., 76(6), 440-446.