Shear Capacity of Reinforced Concrete Beams under Biaxial Bending Based on Equivalent Cross-Section Method

Abstract:

Based on the analysis of reinforced concrete beams under biaxial bending, an equivalent cross-section method is proposed to calculate the shear capacity of the beams. According to the two basic equivalence principles, a biaxial flexural beam is changed into a uniaxial flexural member, and the shear strength of biaxial flexural beam is calculated as a uniaxial flexural member. Furthermore, the interrelationships among the equivalent cross-section and the neutral axis inclination as well as the ratio of depth to width of the cross-section are deduced in advance. The ratios of some typical cross-section’s equivalent dimensions to its original ones are pointed also. In order to verify the availability of the equivalent cross-section method, some academic references about the ultimate strength of biaxial flexural beams are consulted in this paper, and the shear capacity computing methods by literatures for uniaxial flexural beams are adopted in the strength calculation of biaxial flexural reinforced concrete simply supported beams with stirrups or without stirrups. The comparison between the calculation results and experimental results shows that the presented equivalent cross-section method is feasible and practical which can be used as a reference in practice design.

• Periodical: Key Engineering Materials (Volumes 400-402)
• Pages: 275-280
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.400-402.275
• Online since: October 2008
• Authors: Qing Xiang Zeng, Jian Cai
• Keywords: Biaxial Flexural Beam, Equivalent Cross Section, Reinforced Concrete (RC), Shear Capacity

References

[1] XIONG Jin'gang: Dissertation of Nanchang University (1995). (in Chinese).

[2] ZENG Qingxiang: Dissertation of Nanchang University (1993). (in Chinese).

[3] WU Guangyu, XIANG Yiqiang, XU Xing and YU Jinhui: Engineering Mechanics Vol. 22 (4) (2005), p.142. (in Chinese).

[4] Bonet J.L., Miguel P.F., Fernandez M.A., etc.: Engineering Structure Vol. 26(13) (2004), p. (2007).

[5] Bajaj A.S. and Mendis P.: Journal of STRUCT ENG-ASCE Vol. 131 (12) (2005), p. (1926).

[6] XIAO Zhilan and ZENG Qingxiang: Building Science Vol. 17 (4) (2001), p.25. (in Chinese).

[7] ZENG Qingxiang: Building Structure Vol. 35 (1) (2005), p.72. (in Chinese).

[8] WU Weixiu and LI Yan: Journal of Nanchang University (Engineering & Technology) Vol. 26 (3) (2004), p.76. (in Chinese).

[9] WANG Lijun, WANG Tiecheng and WANG Song: Journal of Building Structures Vol. 27 (4) (2006), p.96. (in Chinese).

[10] Bonet J.L., Barros M.H. and Romero M.L.: Computers & Structures Vol. 84(31-32) (2006), p.2184.

[11] SHI Lanqing and Yu Yongyan, in: The Calculation of Shear Resistance of Reinforced Concrete Beams, Design and Detailing of reinforced concrete structure - compiled revise data for design code of concrete structures, edited by China Academy of Building Research 1985, p.112.

DOI: 10.14359/3029

[12] GUO Zhenhai: Reinforced concrete theory. (Tsinghua University Press, 1993) (in Chinese).

[13] WANG Chuanzhi and TENG Zhiming: Reinforced concrete structure theory. (China Architecture and Building Press, 1985) (in Chinese).

[14] ZHANG Kaijing: Journal of Southwest Jiaotong University Vol. 35(1) (2000), p.1. (in Chinese).

[15] Code for design of concrete structures (GB50010-2002). (China Architecture and Building Press, 2002).

[16] ACI Committee 318: Building code requirements for structural concrete (ACI-318-02). (American Concrete Institute, Detroit, 2002).

DOI: 10.1061/(asce)1076-0431(1996)2:3(120.3)