Advance Researches in Civil Engineering

Advance Researches in Civil Engineering

Evaluating the Seismic Performance of Modern Concentrically Braces with the Finite Element Method

Document Type : Original Article

Author
PhD Student, Civil Engineering Department, K. N. Toosi University of Technology, Tehran. Iran
Abstract
The use of modern steel braces is one of the ways to increase the lateral stiffness of the structure. Comparing and determining the advantages of braces helps structural designers to make a good design. Therefore, in the present paper, the 2-story steel structure (2D) is designed with finite element method (FEM) and ABAQUS software. Steel frames are seismically improved with Rhombus, V and Inverted V braces. Structures are seismically evaluated during modal analysis in the frequency domain. The results show that the Rhombus brace reduces von mises stress (0.68%), displacement (to a small amount) and eigenfrequency (11.85%) in the steel frame. Rhombus brace has the best seismic performance compared to V and Inverted V braces during modal analysis in the frequency domain.
Keywords

1- Khademi, M., Tehranizadeh, M., and Shirkhani, A., 2023, Case studies on the seismic resilience of reinforced concrete shear wall buildings and steel dual concentrically braced buildings, Structures, 58, 105596. doi:10.1016/j.istruc.2023.105596.
2- Behnamfar, F., Ahmadi, A., Anaraki, A.M.G., and Mazrouei, V., 2023, Performance evaluation of concentrically braced frames equipped with pure bending yielding damper, Structures, 58, 105650. doi:10.1016/j.istruc.2023.105650.
3- Mahdavi, M., Hosseini, S., and Babaafjaei, A., 2023, Modelling and Comparison of Plastic Performance in Ten Types of New Steel Braces under Pushover Analysis, Computational Engineering and Physical Modeling, 6, 79–97. doi.org:10.22115/cepm.2023.428826.1262.
4- Bradley, C.R., Fahnestock, L.A., and Hines, E.M., 2021, Dual system design for a low-ductility concentrically braced frame with a reserve moment frame, Structures, 34, 3315–3328. doi.org:10.1016/j.istruc.2021.09.009.
5- Siddiqi, Z., Hameed, R., and Akmal, U., 2014, Comparison of Different Bracing Systems for Tall Buildings, Pakistan Journal Engineering Application Science, 14, 17–26.
6- Abd Razak, S.M., Kong, T.C., Zainol, N.Z., and Adnan, A., 2018, A Review of Influence of Various Types of Structural Bracing to the Structural Performance of Buildings, E3S Webinar Conference, 34, 1010. doi:10.1051/e3sconf/20183401010.
7- Tah, A., Mohammed, K., and Ozakca, M., 2017, Comparison of Various Bracing System for Self-Supporting Steel Lattice Structure Towers, American Journal of Civil Engineering, 5, 60–8. doi:10.11648/j.ajce.20170502.11.
8- Zheng, L., Dou, S., Tang, S., Ge, H., Wen, W., and Zhang, J., 2024, Seismic performance of improved multistorey X-braced steel frames, Journal of Construction Steel Research, 212, 108306. doi:10.1016/j.jcsr.2023.108306.
9- Li, H., Zhang, W., and Zeng, L., 2023, Seismic assessment of chevron braced frames with differently designed beams. Structures, 49, 1028–1043. doi:10.1016/j.istruc.2023.02.002.
10- Ozcelik, Y., Saritas, A., and Clayton, P.M., 2015, Comparison of chevron and suspended-zipper braced steel frames. Journal of Construction Steel Research, 119, 169–175. doi:10.1016/j.jcsr.2015.12.019.
11- Qiu, C., Jiang, T., Liu, J., and Du, X., 2022, Seismic performance of knee-braced frames equipped with NiTi BRBs, Journal of Construction Steel Research, 197, 107480. doi:10.1016/j.jcsr.2022.107480.
12- Barbagallo, F., Bosco, M., Marino, E.M., and Rossi, P.P., 2019, Achieving a more effective concentric braced frame by the double-stage yield BRB, Engineering Structure, 186, 484–497. doi:10.1016/j.engstruct.2019.02.028.