Seismic Performance of RC Hollow Rectangular Bridge Piers Retrofitted by Concrete Jacketing Considering the Initial Load and Interface Slip
DOI:
https://doi.org/10.5614/j.eng.technol.sci.2020.52.3.4Keywords:
bridge pier, concrete jacketing, initial load, interface slip, moment-curvature, plastic hinge model, pushover analysis, retrofit, seismic performanceAbstract
In design practice, the assumptions that are used in retrofitting concrete structural elements often ignore the initial load and the interface slip on the contact surfaces between the old and the new concrete. The concrete structural elements that are loaded by the existing gravity load cause initial strain on the existing cross-section before jacketing is applied, while the interface does not act in a fully composite manner. In this study, a seismic performance evaluation using pushover analysis was performed of a damaged reinforced concrete bridge pier retrofitted with concrete jacketing, where the plastic hinge of the retrofitted elements was modeled by considering both parameters. The results showed that concrete jacketing could increase the capacity of the bridge structure. It was also found from the numerical result that the performance level of the bridge considering the initial load compared to the monolithic approach gave the same result since the initial load did not significantly affect the cross-sectional ultimate capacity. The difference between the ultimate capacity values computed by the two models was less than 7%. It was also shown that the interface slip had a significant effect with a slip coefficient smaller than 0.5.Downloads
References
Chen, W.F. & Duan, L., Bridge Engineering in Indonesia, Handbook of International Bridge Engineering, CRC Press Taylor & Francis Group, LLC, pp. 951-1016, 2014.
Campione. G., Fossetti, M., Giacchino. C. & Minaf, G., RC Columns Externally Strengthened with RC jackets, Materials and Structures/ Materiaux ET Constructions, 47(10), pp. 1715-1728, 2014.
FIB Task Group 7.4, FIB Bulletin No. 39: Seismic Bridge Design and Retrofit - Structural Solutions, Lausanne, Switzerland: FIB (Federation Internationale du Beton), 2007.
Ersoy, U., Tankut, A.T. & Suleiman, R., Behavior of Jacketed Columns, ACI Structural Journal, 90(3), pp. 288-293, 1993.
Julio, E.N.B.S., Branco, F.A.B. & Silva, V.D., Reinforced Concrete Jacketing - Interface Influence on Monotonic Loading Response, ACI Structural Journal, 102(2), pp. 252-257, 2005.
Julio, E.N.B.S. & Branco, F.A.B., Reinforced Concrete Jacketing - Interface Influence on Cyclic Loading Response, ACI Structural Journal, 105(4), pp. 1-7, 2008.
Vandoros, K.G. & Dritsos, S.E., Concrete Jacket Construction Detail Effectiveness when Strengthening RC Columns, Construction and Building Materials, 22(3), pp. 264-276, 2008.
Alhadid, M.M.A. & Youssef, M.A., Analysis of Reinforced Concrete Beams Strengthened Using Concrete Jackets, Engineering Structures, 132, pp. 172-187, 2017.
The National Standardization Agency of Indonesia (BSN), SNI 03-1726-2002 Seismic Provisions for Buildings Structures, 2002. (Text in Indonesian)
LAPI ITB, Cisomang Bridge Structural Analysis Report, PT. LAPI ITB, Bandung, 2017.
Park, R. & Paulay, T., Reinforced Concrete Structures, John Wiley & Sons, Inc, 1975.
Octora, D.D., Analysis of Bridge Pier Retrofitted by Jacketing Method Considering the Initial Load and Interface Slip, Master's Thesis, Institut Teknologi Bandung, Bandung, Indonesia, 2019.
Ong, Y.C., Kog, Y.C., Yu, C.H. & Sreekanth, A.P., Jacketing of Reinforced Concrete Columns Subjected to Axial Load, Magazine of Concrete Research, 56(2), pp. 89-98, 2004.
Mander, J.B., Priestley, M.J.N. & Park, R., Theoretical Stress" Strain Model for Confined Concrete, ASCE Journal of Structural Engineering, 114(8), pp. 1804-1826, 1988.
Priestley, M.J.N., Seible, F. & Calvi, G.M., Seismic Design and Retrofit of Bridges, John Wiley & Sons, Inc., 1996.
ACI Committee 318, ACI 318M-14 Building Code Requirements for Structural Concrete, American Concrete Institute, 2014.
PEER, Guidelines for Nonlinear Analysis of Bridge Structures in California, Pacific Earthquake Engineering Research Center, 2008.
Caltrans, Seismic Design Criteria version 1.7, California Department of Transportation, 2013.
NCHRP, NCHRP Synthesis 440: Performance-Based Seismic Bridge Design, Washington, D.C.: Transportation Research Board, 2103.
FEMA, FEMA-273: NEHRP Guidelines for The Seismic Rehabilitation of Buildings, Washington, D.C.: Federal Emergency Management Agency (FEMA), 1997.
The National Standardization Agency of Indonesia (BSN), SNI 2833:2016: Design of Bridge Structures for Earthquake Loads, 2016. (Text in Indonesian).
ACI Committee 440, ACI 440.2R-08: Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures, American Concrete Institute, 2008.
