Developed Model of Cold-Formed Steel Shear Walls Based on Its Physical and Mechanical Characteristics

Document Type : Research Article

Authors

1 Associate Professor, Faculty of Civil Engineering, University of Tabriz, Tabriz, Iran

2 M.Sc. Student, Faculty of Civil Engineering, University of Tabriz, Tabriz, Iran

Abstract

Research aim: Cold-formed steel (CFS) members form the main structure of lightweight steel frames (LSF). Structures made with these members, due to their lightweight compared to structures made with other building materials, can be considered as an appropriate solution to prevent and reduce earthquake vulnerability in seismic zones. On the other hand, geology evidence shows that due to the high density of active faults in Iran, this zone has a high seismic potential; as a result, it can be found that a large part of the country's population lives in the fault zone. In recent years, regarding the use of lightweight steel structures, providing lateral bearing capacity as a challenging subject has led to various studies in this field. These studies show that the study of the performance of CFS shear walls under near-fault field earthquakes is one of the subjects that has less addressed. In the present paper, the lateral performance of CFS shear walls with flat steel sheet sheathing has been studied based on non-linear dynamic analysis in the near-fault field.
Research methodology: Whereas today, the use of modeling software in the field of lightweight steel structures consider an appropriate alternative to some time-consuming and costly studies with experimental tests. In this research, the OpenSees finite element software has been used for studies. Considering that previous studies in the field of CFS shear walls more focus on static loading (monotonic and cyclic); first, with the help of two presented numerical models, the existing models have been developed for the appropriate ‎prediction of CFS shear wall responses under non-linear dynamic loading. It should be noted that in this research, the use of OpenSees has been preferred over other software for two main reasons: 1) Considering that CFS shear walls with steel sheet sheathing due to the early onset of shear buckling in the sheathing, experience significant pinching of the strength ‎versus displacement response; the presence of an extensive ‎library of materials and elements in the OpenSees, makes it possible to study lateral performance of CFS shear walls with pinching effects without the need for subroutine ‎coding; and 2) The high speed of the OpenSees in modeling and analysis, provides the possibility of numerous calculations and thus the study of the seismic performance of shear walls under multiple earthquakes. Also, considering that often the models presented in OpenSees for modeling CFS shear walls, contain data dependent to experimental tests; one of the most important features of the numerical model developed in this research is the reduce dependence from the conditions and results of experimental tests that provides ‎the modeling of CSF shear walls with new configurations in a simpler way. It can be found that the improvement of numerical models that in defining their data is not so much required time-consuming and costly experimental tests, to study the performance of this type of lateral bearing systems is efficient. Due to this issue in the following, 18 specimens ‎of single-storey CFS shear wall have been modeled with ‎different configurations and have ‎been analyzed and studied in the near-fault field under a set of no pulse-like and pulse-like earthquakes.‎
Findings: The results showed that the developed numerical model is able to predict CFS shear wall responses under non-linear dynamic loading and similar to previous studies, in order to appropriate predict the seismic performance of shear walls, it is necessary to consider more details in the numerical model. In order to better evaluating the performance of shear walls, the measurement of the used steels is necessary and a definite result only based on the nominal specifications cannot be reached. The spacing of the fasteners affects the response of the shear wall specimens and in addition, long spaces of fasteners, especially in pulse-like earthquakes, cause undesirable shear wall performance.

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Main Subjects

References

  1. Yu, W.W., LaBoube, R.A., and Chen, H. (2019) 'Introduction.' In: Cold-Formed Steel Design. John Wiley & Sons, Hoboken, 1-35.
  2. Serrette, R., Encalada, J., Hall, G., Matchen, B., Nguyen, H., and Williams, A. (1997) Additional Shear Wall Values for Light Weight Steel Framing (Draft). Report No. LGSRG-1-97. Technical Report. Department of Civil Engineering, Santa Clara University, Santa Clara.
  3. Ong Tone, C. and Rogers, C.A. (2009) Tests and Evaluation of Cold-Formed Steel Frame/Steel Sheathed Shear Walls. Research Report. Department of Civil Engineering and Applied Mechanics, McGill University, Montreal.
  4. El-Saloussy, K. (2010) Additional Cold-Formed Steel Frame/Steel Sheathed Shear Wall Design Values for Canada. Master Thesis. Department of Civil Engineering and Applied Mechanics, McGill University, Montreal.
  5. Balh, N. (2010) Development of Seismic Design Provisions for Steel Sheathed Shear Walls. Master Thesis. Department of Civil Engineering and Applied Mechanics, McGill University, Montreal.
  6. DaBreo, J. (2012) Impact of Gravity Loads on the Lateral Performance of Cold-Formed Steel Frame/Steel Sheathed Shear Walls. Master Thesis. Department of Civil Engineering and Applied Mechanics, McGill University, Montreal.
  7. Shamim, I. (2012) Seismic Design of Lateral Force Resisting Cold-Formed Steel Framed (CFS) Structures. Ph.D. Thesis. Department of Civil Engineering and Applied Mechanics, McGill University, Montreal.
  8. Shamim, I., DaBreo, J., and Rogers, C.A. (2013) Dynamic testing of single-and double-story steel-sheathed cold-formed steel-framed shear walls. Journal of Structural Engineering, 139(5), 807-817.
  9. Shamim, I. and Rogers, C.A. (2013) Steel sheathed/CFS framed shear walls under dynamic loading: numerical modelling and calibration. Thin-Walled Structures, 71, 57-71.
  10. McKenna, F. (2011) Opensees: A framework for earthquake engineering simulation. Computing in Science & Engineering, 13(4), 58-66.                      
  1. Kechidi, S. and Bourahla, N. (2016) Deteriorating hysteresis model for cold-formed steel shear wall panel based on its physical and mechanical Thin-Walled Structures, 98, 421-430.
  2. Ibarra, L.F., Medina, R.A., and Krawinkler, H. (2005) Hysteretic models that incorporate strength and stiffness deterioration. Earthquake Engineering & Structural Dynamics, 34(12), 1489-1511.
  3. Ibarra, L.F. and Krawinkler, H. (2005) Global Collapse of Frame Structures under Seismic Excitations. Report No. PEER Report 2005/06. Pacific Earthquake Engineering Research Center (PEER), University of California, Berkeley.
  4. Lignos, D.G. and Krawinkler, H. (2011) Deterioration modeling of steel components in support of collapse prediction of steel moment frames under earthquake loading. Journal of Structural Engineering, 137(11), 1291-1302.
  5. Sharafi, P., Mortazavi, M., Usefi, N., Kildashti, K., Ronagh, H., and Samali, B. (2018) Lateral force resisting systems in lightweight steel frames: Recent research advances. Thin-Walled Structures, 130, 231-253.
  6. PEER (2010) Technical Report for the PEER Ground Motion Database Web Application-Beta Version. Technical Report. Pacific Earthquake Engineering Research Center (PEER), University of California, Berkeley.
  7. Gioncu, V. and Mazzolani, F.M. (2010) 'Peculiar features of near-source ground motions.' In: Earthquake Engineering for Structural Design, Spon Press, New York, pages 249-275.
  8. Yaghmaei-Sabegh, S. (2010) Detection of pulse-like ground motions based on continues wavelet transform. Journal of Seismology, 14(4), 715-726.
  9. Yaghmaei-Sabegh, S., Jafari-Koucheh, E., and Ebrahimi-Aghabagher, M. (2020) Estimating the seismic response of nonlinear structures equipped with nonlinear viscous damper subjected to pulse-like ground records. Structures, 28, 1915-1923.
  10. Usefi, N., Ronagh, H., Kildashti, K., and Samali, B. (2018) Macro/micro analysis of cold-formed steel members using ABAQUS and OPENSEES. 13th International Conference on Steel, Space and Composite Structures (SS18), University of Western Australia, Perth.
  11. Buonopane, S.G., Bian, G., Tun, T.H., and Schafer, B.W. (2015) Computationally efficient fastener-based models of cold-formed steel shear walls with wood sheathing. Journal of Constructional Steel Research, 110, 137-148.
  12. Kechidi, S. and Bourahla, N. (2021) Cold-Formed Steel Sheathed Shear Wall Panel examples. (2016, March 13 - last update). [Online]. Available: https://opensees.berkeley.edu/wiki/index.php/Cold-Formed_Steel_Steel_Sheathed_Shear_Wall_Panel_examples [2021, February 10].
  13. Bailey Metal Products Limited [Online]. Available: http://www.bmp-group.com/resource-librarymain/
    load-tables     [‎2021, February 10‎].
  14. American Iron Steel Institute (AISI) (2016) North American Specification for the Design of Cold-Formed Steel Structural Members (AISI S100). 16w/S1-18 ed. Washington, D.C.
  15. Yu, C. and Chen, Y. (2009) Steel Sheet Sheathing Options for Cold-Formed Steel Framed Shear Wall Assemblies Providing Shear Resistance-Phase 2. Report No. UNT-G70752. Research Report. Department of Engineering Technology, University of North Texas, Denton.
  16. Campiche, A., Fiorino, L., and Landolfo, R. (2020) Numerical modelling of CFS two-storey sheathing-braced building under shaking-table excitations. Journal of Constructional Steel Research, 170, 106110.
  17. NGA-West2 -- Shallow Crustal Earthquakes in Active Tectonic Regimes. [Online]. Available: https://ngawest2.berkeley.edu/spectras/new [‎2021, February 10‎].
  18. Permanent committee for revising the Iranian code of practice for seismic resistant design of buildings (2014) Iranian Code of Practice for Seismic Resistant Design of Buildings-Standard No. 2800. 4th Building Housing Research Center (BHRC), Teheran (in Persian).
  19. Somerville, P.G. (2005) Engineering characteri-zation of near fault ground motions. New Zealand Society for Earthquake Engineering (NZSEE), Taupo.

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History

  • Receive Date: 17 February 2021
  • Revise Date: 16 October 2021
  • Accept Date: 30 October 2021

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