Unity Equation of Torsional Capacity for RC Members Subjected to Axial Compression, Bend, Shear and Torque

Abstract:

The mechanics performance of reinforced concrete members subjected to axial compression, bending, shear and torque is very complex. Several calculation models have been established to estimate the torsional capacity of combined torsion members; however, the calculation results of different models have a great variation. In this paper, variable-angle space truss model is adopted to analyze the mechanics performance of reinforced concrete members subjected to combined torsion. With respect to various shapes of specimens, various load modes, and various strength of concrete, a unity equation about torsional capacity of combined torsional member is obtained. Based on the unity equation, the torsional capacity of 59 combined torsional specimens is calculated. In contrast with the equation of ACI and the code of China, the torsional capacity calculated by the unity equation agrees well with the results of experiment and much better than the results of ACI code and China code. It is concluded that the unity equation can provide valuable reference for calculation and design of combined torsion members.

• Periodical: Advanced Materials Research (Volumes 163-167)
• Pages: 874-879
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.163-167.874
• Online since: December 2010
• Authors: Jin Jie Men, Qing Xuan Shi, Qiu Wei Wang
• Keywords: Combined Torsion, Eccentric Angle, Load Mode, Unity Equation of Torsional Capacity

References

[1] Zhilin Yin, Yu Zhang, and Zhendong Wang: Torsion, China Railway Publishing House, Beijing (1990) (In Chinese).

[2] Jinjie Men, Qingxuan Shi, Jiafu Li: Proceedings of the Ninth International Symposium on Structural Engineering for Young Experts, Fuzhou and Xiamen, (2006), pp.910-915(In Chinese).

[3] Jinjie Men: The experimental study on torsional behavior of high strength RC members subjected to axial eccentric compression, shear and torque, QingDao technological university QingDao (2004) (In Chinese).

[4] Weihong Qin, Zhuo Xi: Journal of southeast university, Vol. 27, No. 3 (1997), pp.6-11(In Chinese).

[5] Yongmei Lin, Xiaozhen Zhou, Liande Zhang: Journal of building structure, Vol. 17, No. 1 (1996), pp.29-38(In Chinese).

[6] Jiming Liu, Huangsheng Sun, and Liande Zhang: Journal of building structures, Vol. 22, No. 3 (2001), pp.48-53(In Chinese).

[7] Yunting Wei, Liande Zhang: Building structure, Vol. 21, No. 1 (1991), pp.19-24. (In Chinese).