FIELD TEST ON THE COOPERATION OF NSM STRENGTHENING AND EXTERNAL TENDON RETROFITTING TECHNIQUE
DOI:
https://doi.org/10.14311/CEJ.2020.01.0004Keywords:
Static loading test, Finite element method, NSM strengthening, Prestressed concrete rigid frame bridge, External tendon retrofitting techniqueAbstract
In this paper, post-tension and steel plate near-surface mounted (NSM) strengthening systems are proposed to strengthen deteriorated and cracked large box girder rigid frame bridge without altering appearance and dimension of the bridge. The reinforcement method mainly improves the bearing capacity through external prestressed tendons, and bonding steel plate can enhance the shear resistance of the bridge. The main purpose is to study the structural mechanical properties before and after the reinforcement of rigid frame bridges. Take a 540m rigid frame box girder bridge as an example. The static load test of the bridge before and after reinforcement is carried out. The deflection and strain of the middle cross section of the span are measured in the static test. A finite element analysis model was also developed and verified static loading test data. The results show that structural bearing capacity and performance of the bridge were enhanced with the post-tension and NSM strengthening systems cooperatively.
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References
Jose A. Instrumentation system for post-tensioned segmental boxgirder bridges. Master dissertation,
Austin: University of Texas,1991
Vladimir K, Zdenek P, Milos Z, and Alena K. Box girder bridge deflections, (2006). ACI concrete
international, Vol. 28 (1): 55–63
H. Lee, W. Jung, W. Chung, (2018). Field test of an old RC bridge before and after NSM
strengthening. Composite Structures; Vol. 202:793-801
H. Osman, A. Sreenivas, K. Jonathan, (2001). Application of FRP laminates for strengthening of a
reinforced-concrete T-beam bridge structure. Composite Structures 52:453-466.
Zhang, Kexin , and Q. Sun, (2017). "Experimental Study of Reinforced Concrete T-Beams Strengthened with a Composite of Prestressed Steel Wire Ropes Embedded in Polyurethane Cement (PSWR–PUC)." International Journal of Civil Engineering. 16:1109–1123.
Morris. S, (1978). Survey of the durability performance of posttensioning tendons. ACI J, vol. 75(10):501–510.
J. L. Xu, Z. L. Yi, J. L. Yang, (2013). A Study on the Quality Assessment System of External Prestressing Reinforcement Technology, Applied Mechanics and Materials, vol. (351-352): 1347-1353.
Y. Shen, T.Y. Song, G.P. Li, 2015. Advances of external prestressing tendons in multi-span curved box-girder bridges. Multi-Span Large Bridges – Proceedings of the International Conference on Multi-Span Large Bridges, 1255-1262.
A. M. Ibrahim, (2010). Parametric study of continuous concrete beam Prestressed with external tendon. Jordan Journal of Civil Engineering, vol. (4)3:211-221.
Lopez, A. , Galati, N. , Alkhrdaji, T. , & Nanni, A., 2007. Strengthening of a reinforced concrete bridge with externally bonded steel reinforced polymer (srp). Composites Part B (Engineering), vol. 38(4), 429-436.
Oh, H. , Sim, J. , & Meyer, C., 2003. Experimental assessment of bridge deck panels strengthened with carbon fiber sheets. Composites Part B Engineering, vol. 34(6), 527-538.
Lee H Y , Jung W T , Chung W,( 2017).Flexural strengthening of reinforced concrete beams with pre-stressed near surface mounted CFRP systems. Composite Structures, vol. 163:1-12
Fathelbab, F. A. , Ramadan, M. S. , & Al-Tantawy, A. . (2014). Strengthening of RC bridge slabs using CFRP sheets. Alexandria Engineering Journal, 53(4), 843-854.
Maléna Bastien-Masse, & Eugen Brühwiler, 2013. Concrete bridge deck slabs strengthened with uhpfrc. Iabse Symposium Report, vol. 99(22).
Lee H, Jung W T, Chung W, (2017). Post-tension near-surface-mounted strengthening systems of full-scale PSC girders. Construction and Building Materials, vol. 151: 71-82.
Khudeira, S. . (2010). Strengthening of deteriorated concrete bridge girders using an external posttensioning system. Practice Periodical on Structural Design and Construction, 15(4), 242-247.
Parke G A , Disney P , Ahmadikashani K, (2005).Strengthening box-girder bridges using external post-tensioning. Thomas Telford:97-104.
Dunker, K. F. . (1985). Strengthening of simple span composite bridges by post-tensioning.
Van Lier, J. , & Pronk, M. . (2013). Reinforcing concrete box girder bridges with external post-tensioning and steel. IABSE Symposium Report, 99(22), 670-677.
Taljsten, B. , & Nordin, H. . (2007). Concrete beams strengthened with external prestressing using external tendons and near-surface-mounted reinforcement (nsmr). Journal of Quantitative Spectroscopy & Radiative Transfer.
JTG D60-2004 General Code for Design OF Highway Bridges and Culverts. P.R. China, Ministry of Communications, 2004.
JTJ 021-1989. General Code for Design of Highway Bridges and Culverts, P.R. China, Ministry of Communications,1989.
AASHTO LRFD bridge design specifications, third edition. Washington, DC: American Association of State Highway and Transportation Officials; 2012
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