Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 32302
Ductility, Rμ, and Overstrength Factors for V Braced Reinforced Concrete Buildings

Authors: Birendra Kumar Bohara


Steel bracings are used to improve the seismic behaviors of the structures. In this study, 8, 12 and 16 story reinforced concrete (RC) buildings with steel bracings are used in three base shear contributions (25%, 50% and 75%) in the columns. With the help of pushover analysis and capacity curves, the overstrength factors, ductility factors and ductility reduction factors are investigated for braced RC buildings. It is observed that when the base shear contribution in the columns increases the ductility reduction factor also increases. The results show that when the time period of the structures increases, the ductility reduction factors of the structures decrease.

Keywords: Steel bracing, overstrength factor, ductility, ductility reduction factors, base shear contributions.

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 225


[1] B. K. Bohara, “Seismic Response of Hill Side Step-back RC Framed Buildings with Shear Wall and Bracing System,” Int. J. Struct. Constr. Eng., vol. 15, no. 4, pp. 204–210, 2021.
[2] K. H. Ganaie, B. K. Bohara, and P. Saha, “Effects of Inverted V Bracing in Four-Story Irregular RC,” Int. Res. J. Mod. Eng. Technol. Sci., vol. 03, no. 04, pp. 2346–2351, 2021, (Online). Available:
[3] M. R. Maheri and A. Sahebi, “Use of steel bracing in reinforced concrete frames,” Eng. Struct., vol. 19, no. 12, pp. 1018–1024, 1997, doi: 10.1016/S0141-0296(97)00041-2.
[4] Y. Yamamoto and H. Umemura, “Analysis of reinforced concrete frames retrofitted with steel brace,” in Earthquake Engineering, teenth World Conference, 1992, pp. 5187–5192.
[5] B. M. Badoux and J. O. Jirsa, “Steel Bracing of RC Frames for Seismic Retrofitting,” J. Struct. Eng., vol. 116, no. 1, pp. 55–74, 1990.
[6] H. Abou-Elfath, M. Ramadan, and F. Omar Alkanai, “Upgrading the seismic capacity of existing RC buildings using buckling restrained braces,” Alexandria Eng. J., vol. 56, no. 2, pp. 251–262, 2017, doi: 10.1016/j.aej.2016.11.018.
[7] A. Rahimi and M. R. Maheri, “The effects of retrofitting RC frames by X-bracing on the seismic performance of columns,” Eng. Struct., vol. 173, 2018, doi: 10.1016/j.engstruct.2018.07.003.
[8] A. Rahimi and M. R. Maheri, “The effects of steel X-brace retrofitting of RC frames on the seismic performance of frames and their elements,” Eng. Struct., vol. 206, no. December 2019, 2020, doi: 10.1016/j.engstruct.2019.110149.
[9] E. A. Godínez-Domínguez and A. Tena-Colunga, “Nonlinear behavior of code-designed reinforced concrete concentric braced frames under lateral loading,” Eng. Struct., vol. 32, no. 4, pp. 944–963, 2010, doi: 10.1016/j.engstruct.2009.12.020.
[10] M. R. Maheri, R. Kousari, and M. Razazan, “Pushover tests on steel X-braced and knee-braced RC frames,” Eng. Struct., vol. 25, no. 13, pp. 1697–1705, 2003, doi: 10.1016/S0141-0296(03)00150-0.
[11] M. R. Maheri and R. Akbari, “Seismic behaviour factor, R, for steel X-braced and knee-braced RC buildings,” Eng. Struct., vol. 25, no. 12, pp. 1505–1513, 2003, doi: 10.1016/S0141-0296(03)00117-2.
[12] E. A. Godínez-Domínguez and A. Tena-Colunga, “Behavior of ductile steel X-braced RC frames in seismic zones,” Earthq. Eng. Eng. Vib., vol. 18, no. 4, pp. 845–869, 2019, doi: 10.1007/s11803-019-0539-0.
[13] B. K. Bohara, K. H. Ganaie, and P. Saha, “Seismic Analysis of Retrofitting of RC Regular Frame with V-Braced Frame,” J. Eng. Technol. Plan., vol. 2, no. 1, pp. 55–63, 2021, doi: 10.3126/joetp.v2i1.39229.
[14] B. K. Bohara, K. H. Ganaie, and P. Saha, “Effect of position of steel bracing in L-shape reinforced concrete buildings under lateral loading,” Res. Eng. Struct. Mater., vol. x, no. xxxx, pp. 1–23, 2021, doi: 10.17515/resm2021.295st0519.
[15] C. Uang, “Establishing R (or Rw) and Cd Factors for Building Seismic Provisions,” J. Struct. Eng., vol. 117, no. 1, pp. 19–28, 1991, doi: 10.1061/(asce)0733-9445(1991)117:1(19).
[16] N. M. Newmark and W. J. Hall, Earthquake spectra and design. Oakland: Earthquake Engineering Research Institute (EERI), 1982.
[17] I. S. IS, Part 1(2016). General provisions and buildings: Criteria for Earthquak Resistant Design of Structure, 1893.
[18] Birendra Kumar Bohara, “Nonlinear Behavior of Moment Resisting Reinforced Concrete with Steel Braced Frame under Lateral Loading,” mtech Thesis in Sharda University, 2021.