Research on the Short-Time Deflection of Concrete Beams Reinforced with 500MPa Steel Bars

Abstract:

Fourteen concrete beams reinforced with 500MPa longitudinal steel bars were tested under two-point symmetrical concentrated static loading to investigate their deflection characteristics. And the formula for short-time stiffness specified in the code for design of concrete (GB50010-2010)were evaluated using the experimental results and available test data of 74concrete beams reinforced with 500MPa longitudinal steel bars. The results show that the deflection behavior of beams with 500MPa longitudinal steel bars is essentially similar to that of beams reinforced with conventional steel reinforcements. It is also shown that the formula for short-time stiffness under service loads specified in GB50010-2010 is applicable for flexural members reinforced with 500MPa longitudinal steel bars. Comparisons of the test results with the calculated values for the short-time deflection according to GB50010-2010 show that the code method can be used to estimate the short-time deflection for beams reinforced with 500MPa longitudinal steel bars, but that the method is somewhat less accurate for beams with light reinforcement ratio and low-strength concrete.

• Periodical: Applied Mechanics and Materials (Volumes 166-169)
• Pages: 1592-1597
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.166-169.1592
• Online since: May 2012
• Authors: Zhi Hua Li, Xiao Zu Su
• Keywords: Deflection, High-Strength Bar, Reinforced Concrete (RC) Beam, Short-Time Stiffness

References

[1] Chinese Standard. GBl499-1998 Hot ribbed bar of reinforced Concrete[S].Beijing: China Building Industry Press, 1998.(In Chinese)

[2] Jianfeng Lu, Yongsheng Jiang, Shuting Liang. Journal of Southeast, University, 1996, 26(6B): 109-114. (In Chinese)

[3] Ting Zhang. Experimental Research on the performance of Flexural members Reinforced with 500MPa Steel Bars[D]. Zhengzhou: School of Civil Engineering, Zhengzhou University, 2004. (In Chinese)

[4] Jianwei Meng. Experimental Research and Analysis of Fatigue Behavior of High-Strength Reinforced Concrete Beams[D]. Shijiazhuang: School of Civil Engineering, Shijiazhuang Railway Institute, 2004. (In Chinese)

[5] Tiecheng Wang, Yanyan Li, Xian Rong. Journal of Tian Jin University, 2007, 40(5):507-511. (In Chinese)

[6] Zhenkun Ding. Research on Calculation Method of Flexural Stiffness of Concrete members [D]. Nanjing: School of Civil Engineering, Southeast University, 2008. (In Chinese)

[7] Ziqiong Zhang, Mingping Wang, Shujiang Geng. Sichuan Building Science, 2008, 34(1): 1-4. (In Chinese)

[8] Jinjie Zhao. Experimental Investigation of Flexural Performance of Concrete Beams With HRBF500 Bars [D]. Beijing: School of Civil Engineering, Beijing Industrial University, 2008. (In Chinese)

[9] Bin Tan. Experimental Research on the Short-time Stiffness Formulae of Concrete Beams Reinforced with 500MPa Steel Bars[D]. Shanhai: School of Civil Engineering, Tongji University, 2009. (In Chinese)

[10] Chinese Standard. GB50010-2010 Code for design of concrete structures [S]. Beijing: China Building IndustryPress, 2002.(In Chinese)