Effect of Near and Far Fault Earthquake on the Shear Wall and Buckling Restrained Braces

Author

Department of Civil Engineering, Mahdishahr Branch, Islamic Azad University

Abstract

Near fault earthquakes compared to far-fault earthquakes have greater potential to create damage in structure. In this paper, the effect of far fault and near fault events on structural response of reinforced concrete shear wall with buckling restrained brace frame in tall and mid-rise buildings is studied. In the modeling, the specification of the reinforced shear wall and the buckling restrained braces is used. This kind of structural system is essentially a combined system. In this study, the structural system of the considered buildings is designed by using the valid codes and using response spectrum analysis method. Then, the nonlinear model is prepared. In the numerical model of the walls, the fiber type elements is used. The nonlinear time history analysis is implemented subjected to the far fault and near fault earthquakes. Finally, the responses of the structures are analyzed and compared. The results showed that, in the level of the base, the amount of shear demand of the wall share in the near field and far field is more than three times and twice the amount of shear demand share of braces. On average, the values of the strain demand ratio to the yielding strain in the core of the braces under the near field earthquakes was about 22, which is approximately 12 for the far field earthquakes.

Keywords

References

Ahmed M, Tayyaba S, Ashraf MW, “Effect of buckling restrained braces locations on seismic responses of high-rise rc core wall buildings”, Shock and Vibration, 2016, 1-15. doi:10.1155/2016/6808137.
ASCE/SEI 7-2010, “Minimum design loads for buildings and other structures”, American Society of Civil Engineers: Reston, VA, 2010.
Applied Technology Council, “ATC-72: Modeling and Acceptance Criteria for Seismic Design and Analysis of Tall Buildings”, 2010. ATC, Redwood City, CA.
Black C, Makris N, Aiken I, “Component testing, stability analysis and characterization of buckling-restrained braces”, Report No. PEER-2002/08, Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, USA, 2002.
Beiraghi H, Kheyroddin A, Kafi MA, “Effect of record scaling on the behavior of reinforced concrete core-wall buildings subjected to near-fault and far-fault earthquakes”, Scientia Iranica article in press.
Beiraghi H, Siahpolo N, “Seismic assessment of RC core-wall building capable of three plastic hinges with outrigger”, The Structural Design of Tall and Special Buildings. Article first published online, 2016, DOI: 10.1002/tal.1306.
Beiraghi H, Kheyroddin A, Kafi MA, “Nonlinear fiber element analysis of a reinforced concrete shear wall subjected to earthquake records. Transactions of Civil Engineering”, 2015, 39 (C2+), 409-422.
Chopra AK, Chintanapakdee C, “Comparing response of SDF systems to near-fault and far-fault earthquake motions in the context of spectral regions”, Earthquake Engineering and Structural Dynamics, 2001.
FEMA P695, “Quantification of building seismic performance factors (ATC-63 Project)”, Federal Emergency Management Agency, Washington D.C, 2009.
Iwan WD, “Drift spectrum: measure of demand for earthquake ground motions”, Journal of Structural Engineering, 1997; 123 (4), 397-404.
Liu PS, Bai L, “Seismic reinforcement application of buckling-restrained braces in the bottom frame-shear wall structure”, Advanced Materials Research, 2014, 919-921, 1012-1015. doi:10.4028/www.scientific.net/amr.919-921.1012.
LATBSDC, “An alternative procedure for seismic analysis and design of tall buildings located in the losangeles region”, Los Angeles Tall Buildings Structural Design Council: Los Angeles, 2011.
Mander JB, Priestley JN, Park R, “Theoretical stress-strain model for confined concrete”, ASCE Journal of Structural Engineering, 1988,114 (8), 1804-1827.
NIST, “Seismic design of steel buckling-restrained braced frames: A guide for practicing engineers, GCR 15-917-34, NEHRP Seismic Design Technical Brief No. 11, produced by the Applied Technology Council and the Consortium of Universities for Research in Earthquake Engineering for the National Institute of Standards and Technology, Gaithersburg, MD, 2015.
Orakcal K, Wallace JW, “Flexural modeling of reinforced concrete walls-model calibration”, ACI Structural Journal, 2006, 103 (2), 196-206.
PERFORM-3D, “Nonlinear analysis and performance assessment for 3D structures”, V.4.0.3. Computers and Structures, Inc., Berkeley, CA, 2011.
Sahoo DR, Chao S, “Performance-based plastic design method for buckling-restrained braced frames”, Engineering Structures, 2010, 32: 2950-2958.
Somerville PG, Smith NF, Graves RW, Abrahamson NA. “Modification of empirical strong ground motion attenuation relations to include the amplitude and duration effects of rupture directivity”, Seismological Research Letters, 1997, 68:199-222.
Uriz P, Mahin SA, “Toward earthquake-resistant design of concentrically braced steel-frame structures”, PEER 2008/08, Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, 2008.
Journal of Civil and Environmental Engineering
Volume 49.1, Issue 94 - Serial Number 94
Spring 2019
June 2019
Pages 23-33

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