Deflection Calculation on Reinforced Concrete Beams Strengthened by Externally Prestressing Transverse Tensioning Method

Abstract:

Eight reinforced concrete beams (six externally reinforced and two contrast beams) were tested under primary or secondary load experiment. According to the test results, the existing specifications were applied to make calculations on short-term deflection which leaded to a large error. The secondary effect should be considered on calculating the deflection. Therefore, comparisons were made between the improved calculated value and test value on deflections of reinforced concrete beams strengthened by externally prestressed transverse tensioning method and they are in good agreement.

• Periodical: Advanced Materials Research (Volumes 671-674)
• Pages: 430-436
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.671-674.430
• Online since: March 2013
• Authors: Jin Jun Liu, Tian Wen Wang
• Keywords: Deflection, External Prestressing, Reinforcement, Transverse Tension

References

[1] C.G. Li: The external prestressing structure technology and engineering applications (China Architecture and Building Press, China 2008).

[2] Reinforced concrete structure design standard GB50367-2006 (China Architecture and Building Press, China 2006).

[3] Unbonded prestressed concrete structure technology procedures JGJ92-2004 (China Architecture and Building Press, China 2005).

[4] T.W. Wang: Civil engineering structure experiment (Wuhan University of Technology Press, China 2006).

[5] J.S. Xu and L.H. Xue: Rational method for estimating long-term camber and deflection of prestressed concrete flexural members: Building Structure, Vol. 41, (2011) No. 1, pp.95-102.

[6] T.W. Wang and Z.Q. Yin: Calculation method for bending capacity of FRP bars NSM reinforced concrete members considering effect of secondary load: Engineering Journal of Wuhan University, Vol. 38, (2005) No. 4, pp.55-58.

[7] J.S. Xu, L.H. Xue and etc: The long-term horizontal compression deformation of prestressed concrete floor: Building Science, (1997) No. 5, pp.18-23.

[8] L. Zou: Ultimate bearing capacity analysis of externally prestressed concrete beams (Southwest Jiaotong University, 2009).

[9] X.L. Tang, B. Wang and L.W. Yang: Experimental studies on secondary load capacity of RC beam strengthened with CFRP sheet: Building Technique Development, Vol. 34, (2007) No. 10.

[10] D.J. Ding: Reinforced concrete structure of crack resistance, crack and rigidity (Nanjing institute of Technology Press, China 1986).