Optimal placement of post-tensioned self-centering yielding braced systems for braced frame structures

Document Type : Research

Authors

1 Ph.D. Candidate, Faculty of Civil Engineering, K. N. Toosi University of Technology, Tehran, Iran.

2 Professor, Faculty of Civil Engineering, K. N. Toosi University of Technology, Tehran, Iran.

3 Ph.D. Student, Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, Iran.

4 Associate Professor, Department of Civil and Mineral Engineering, University of Toronto, Toronto, Canada.

Abstract

The experience of past prominent earthquakes establishes the fact that the structure’s catastrophes and casualties can be dramatically decreased through the use of self-centering systems. A promising post-tensioned self-centering yielding braced system (PT-SCYBS) has been developed, comprising of two main components, including the post-tensioned wires, exhibiting the desirable self-centering properties, and steel bars, providing the energy dissipation capacity. The structural application of such systems is expeditiously expanding due to their capabilities of not only reducing the residual deformations of the structures but also improving the structure’s performance level. As such, identifying optimal design and proper placement of the proposed device in the structure is of crucial importance. In this paper, the mechanics of the proposed system, as well as a simple and efficient approach for determining the optimal design of the PT-SCYBS, have been proposed. Numerical models have been employed to examine the effect of various configurations of the device on the hysteretic behavior of the proposed PT-SCYBS. Nonlinear static and dynamic analyses are performed on the seismically deficient 3- and 9-story moment resisting frames (MRFs), enhanced with the optimal placement of the PT-SCYBS. Comparing the results of the PT-SCYBS buildings and MRFs, it can be concluded that the residual drift decreased by 96% and 77% for the 3- and 9-story buildings, respectively. As such, the optimal design of the proposed system in the building causes notably lower residual drifts as compared with the MRF buildings, resulting in enhanced seismic performance.

Keywords

References

1. T.T. Soong, G.F. Dargush, Passive energy dissipation systems in structural engineering, Wiley1997.
2. C. Christopoulos, R. Tremblay, H.-J. Kim, M. Lacerte, Self-centering energy dissipative bracing system for the seismic resistance of structures: development and validation, Journal of structural engineering, 134 (2008) 96-107. [DOI:10.1061/(ASCE)0733-9445(2008)134:1(96)]
3. M.R. Eatherton, L.A. Fahnestock, D.J. Miller, Computational study of self‐centering buckling‐restrained braced frame seismic performance, Earthquake engineering & structural dynamics, 43 (2014) 1897-1914. [DOI:10.1002/eqe.2428]
4. J. Erochko, C. Christopoulos, R. Tremblay, H.J. Kim, Shake table testing and numerical simulation of a self‐centering energy dissipative braced frame, Earthquake engineering & structural dynamics, 42 (2013) 1617-1635. [DOI:10.1002/eqe.2290]
5. D.J. Miller, L.A. Fahnestock, M.R. Eatherton, Development and experimental validation of a nickel-titanium shape memory alloy self-centering buckling-restrained brace, Engineering Structures, 40 (2012) 288-298. [DOI:10.1016/j.engstruct.2012.02.037]
6. L.-H. Xu, X.-W. Fan, Z.-X. Li, Development and experimental verification of a pre-pressed spring self-centering energy dissipation brace, Engineering Structures, 127 (2016) 49-61. [DOI:10.1016/j.engstruct.2016.08.043]
7. S. Zhu, Y. Zhang, Seismic analysis of concentrically braced frame systems with self-centering friction damping braces, Journal of Structural Engineering, 134 (2008) 121-131. [DOI:10.1061/(ASCE)0733-9445(2008)134:1(121)]
8. A. Filiatrault, S. Cherry, Seismic design spectra for friction-damped structures, Journal of Structural Engineering, 116 (1990) 1334-1355. [DOI:10.1061/(ASCE)0733-9445(1990)116:5(1334)]
9. R.-H. Zhang, T. Soong, Seismic design of viscoelastic dampers for structural applications, Journal of Structural Engineering, 118 (1992) 1375-1392. [DOI:10.1061/(ASCE)0733-9445(1992)118:5(1375)]
10. N. Gluck, A. Reinhorn, J. Gluck, R. Levy, Design of supplemental dampers for control of structures, Journal of structural Engineering, 122 (1996) 1394-1399. [DOI:10.1061/(ASCE)0733-9445(1996)122:12(1394)]
11. I. Takewaki, Optimal damper placement for minimum transfer functions, Earthquake Engineering & Structural Dynamics, 26 (1997) 1113-1124. https://doi.org/10.1002/(SICI)1096-9845(199711)26:11<1113::AID-EQE696>3.0.CO;2-X [DOI:10.1002/(SICI)1096-9845(199711)26:113.0.CO;2-X]
12. B. Wu, J.-P. Ou, T. Soong, Optimal placement of energy dissipation devices for three-dimensional structures, Engineering Structures, 19 (1997) 113-125. [DOI:10.1016/S0141-0296(96)00034-X]
13. A. Shukla, T. Datta, Optimal use of viscoelastic dampers in building frames for seismic force, Journal of Structural Engineering, 125 (1999) 401-409. [DOI:10.1061/(ASCE)0733-9445(1999)125:4(401)]
14. D.L. Garcia, A simple method for the design of optimal damper configurations in MDOF structures, Earthquake spectra, 17 (2001) 387-398. [DOI:10.1193/1.1586180]
15. L. Moreschi, M. Singh, Design of yielding metallic and friction dampers for optimal seismic performance, Earthquake engineering & structural dynamics, 32 (2003) 1291-1311. [DOI:10.1002/eqe.275]
16. D. Asahina, J.E. Bolander, S. Berton, Design optimization of passive devices in multidegree of freedom structures, 13th World Conf on Earthq Eng, 2004.
17. O. Lavan, R. Levy, Optimal design of supplemental viscous dampers for linear framed structures, Earthquake engineering & structural dynamics, 35 (2006) 337-356. [DOI:10.1002/eqe.524]
18. A.S. Kokil, M. Shrikhande, Optimal placement of supplemental dampers in seismic design of structures, Journal of Seismology and Earthquake Engineering, 9 (2007) 125-135.
19. S. Sanghai, S. Khante, Seismic response of unsymmetric building with optimally placed friction dampers, Technology, 8 (2017) 72-88.
20. E. Nobahar, B. Asgarian, O. Mercan, S. Soroushian, A post-tensioned self-centering yielding brace system: development and performance-based seismic analysis, Structure and Infrastructure Engineering, (2020) 1-21. [DOI:10.1080/15732479.2020.1752262]
21. A.T. Council, M.-A.E. Center, M.C.f.E.E. Research, P.E.E.R. Center, U.S.F.E.M. Agency, N.E.H.R. Program, Interim Testing Protocols for Determining the Seismic Performance Characteristics of Structural and Nonstructural Components, Federal Emergency Management Agency2007.
22. M.F. Mazzoni S, Scott MH and Fenves GL (2009) Open system for earthquake engineering simulation user command-language manual-OpenSees version 2.0. Berkeley, CA: Pacific Earthquake Engineering Research Center, University of California.
23. P.G. Somerville, Development of ground motion time histories for phase 2 of the FEMA/SAC steel project, SAC Joint Venture1997.
24. B.G. Simpson, S.A. Mahin, Experimental and numerical investigation of strongback braced frame system to mitigate weak story behavior, Journal of Structural Engineering, 144 (2018) 04017211. [DOI:10.1061/(ASCE)ST.1943-541X.0001960]
25. FEMA 356. Prestandard and Commentary for the Seismic Rehabilitation of Buildings, Washington, D.C., 2000.
26. ASCE/SEI (ASCE/Structural Engineering Institute). (2016)."Minimum design loads for buildings and other structures."ASCE/SEI 7-16, VA.
Numerical Methods in Civil Engineering
Volume 4, Issue 2
December 2019
Pages 17-35

Files

History

  • Receive Date: 15 July 2019
  • Revise Date: 01 September 2019
  • Accept Date: 14 October 2019

Share

How to cite

Statistics