Advanced Steel Construction

Vol. 8, No. 3, pp. 212-225 (2012)


RESTRAINED BUCKLING BEHAVIOR OF CORE COMPONENT IN BUCKLING-RESTRAINED BRACES

 

J. Wu 1,2, R.J. Liang 1, C.L. Wang 2,3 and H.B. Ge 2,3*

1 Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education,

Southeast University, Sipailou 2, Nanjing 210096, China

2 International Institute for Urban Systems Engineering, Southeast University, Sipailou 2, Nanjing 210096, China

3 Department of Civil Engineering, Meijo University, Tempaku-ku, Nagoya 468-8502, Japan

*(Corresponding author: E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)

Received: 30 May 2011; Revised: 27 July 2011; Accepted: 12 August 2011

 

DOI:10.18057/IJASC.2012.8.3.1

 

View Article   Export Citation: Plain Text | RIS | Endnote

ABSTRACT

In order to investigate the bending moment of the core plate as well as the contact force between the core plate and the restraining component of a Buckling-Restrained Brace member, focus is set to the multi-wave buckling behavior of the core plate under increasing axial load. Based on the equilibrium equation of a segment subjected to axial and lateral forces, equations are derived to describe the deflection curve, the distribution of the moment of the core plate and the contact force. Discussion about these equations reveals the process of multi-wave buckling of the core plate, which is different with that of a free buckling without the lateral restraining component. The core plate experiences point contact, line contact and new wave generation repeatedly, and the axial loads corresponding to different states are given. A calculation example illustrates that the derived equations agree with numerical results, and an experimental result is used to verify the equations.

 

KEYWORDS

Buckling-restrained brace, Restrained buckling, Contact, Multi-wave buckling


REFERENCES

[1]     Uang, C.M., Nakashima, M. and Tsai, K.C., “Research and Application of Buckling-Restrained Braced Frames”, International Journal of Steel Structures, 2004, Vol. 4, No. 4, pp. 301-313.

[2]     Lai, J.W. and Tsai, K.C., “Research and Application of Buckling Restrained Braces in Taiwan”, ANCER Annual Meeting, Hawaii, USA, 2004.

[3]     Xie, Q., “State of the Art of Buckling-Restrained Braces in Asia”, Journal of Constructional Steel Research, 2005, Vol. 61, No. 6, pp. 727-748.

[4]     Luo, X.Q., Ge, H.B. and Usami, T., “Dynamic Numerical Simulation of Steel Frame-Typed Piers Installed with SMA Damping Devices Based on Multi-linear One Dimensional Constitutive Model”, International Journal of Advanced Steel Construction, 2010, Vol. 6, No. 2, pp. 722-741.

[5]     Chen, Z.Y., Ge, H.B. and Usami, T., “Analysis and Design of Steel Bridge Structures with Energy Absorption Members”, International Journal of Advanced Steel Construction, 2008, Vol. 4, No. 3, pp. 173-183.

[6]     Watanabe, A., Hitomi, Y., Saeki, E., et al., “Properties of Brace Encased in Buckling-restraining Concrete and Steel Tube”, Proceedings of 9th World Conference on Earthquake Engineering, Tokyo-Kyoto, Japan, 1988, Vol. 4, pp. 719-724.

[7]     Guo, Y.T. and Ren, W.M., “Some Advances in Confined Buckling”, Advances in Mechanics, 2004, Vol. 34, No. 1, pp. 41-52 (in Chinese).

[8]     Sridhara, B.N., “Sleeved Compression Member”, USA: 5175972, 1993.

[9]     Prasad, B.K., “Experimental Investigation of Sleeved Column”, Proceedings of the 33rd AIAA/ASCE Structures, Structural Dynamics and Materials Conference, Dallas, USA, 1992, pp. 991-999.

[10]   Domokos, G., Holmes, P. and Royce, B., “Constrained Euler Buckling”, Journal of Nonlinear Science, 1997, Vol. 7, No. 3, pp. 281-314.

[11]   Ha, M.Q., “Study on the Mechanical Performances and Applications of Conventional and Innovative Buckling Restrained Braces”, Tongji University, 2004 (in Chinese).

[12]   Chai, H., “The Post-bucking Response of a Bi-laterally Constrained Column“, Journal of the Mechanics and Physics of Solids, 1998, Vol. 46, No. 7, pp. 1151-1181.

[13]   Shen, B. and Deng, C.G., “Continuous Transition from Point Contact to Line Contact between the Axially Compressed Inner Core and the Flexible Sleeve in a Sleeved Column”, Engineering Mechanics2007, Vol. 24, No. 2, pp. 154-160 (in Chinese).

[14]   Shen, B. and Deng, C.G., “Buckling Analysis of an Axially Compressed Strut Constrained by a Flexible Sleeve”, Mechanics in Engineering, 2006, Vol. 28, No. 5, pp. 43-46 (in Chinese).

[15]   Usami, T., Lu, Z.H. and Ge, H.B., “A Seismic Upgrading Method for Steel Arch Bridges Using Buckling-restrained Braces”, Earthquake Engineering and Structural Dynamics, 2005, Vol. 34, No. 4-5, pp. 471-496.