Seismic Assessment and Retrofit, Incorporating Pushover Analysis and Capacity Curves of Irregular Buildings

S. Mathan Kumar*
Department of Civil Engineering, Noorul Islam Centre for Higher Education, Kumaracoil, Tamil Nadu, India..
Periodicity:September - November'2022


Irregular buildings are increasingly common in urban areas around the world, presenting unique challenges for seismic assessment and retrofitting. Pushover analysis and capacity curves have emerged as powerful tools for evaluating the seismic performance of buildings and developing retrofitting strategies. In this study, a methodology is proposed for seismic assessment and retrofitting of irregular buildings that incorporates pushover analysis and capacity curves. The methodology involves the use of finite element models to simulate the behavior of irregular buildings under seismic loading and the development of capacity curves to evaluate the structural response. The efficacy of the proposed methodology is demonstrated through a case study of an irregular building in a high-seismic area. Capacity curves developed using pushover analysis can identify potential failure modes in the building, and targeted retrofitting strategies can be developed based on these findings. Our results highlight the importance of using advanced analysis and design techniques to ensure the safety and resilience of irregular buildings in seismic areas. The proposed methodology can be applied to a wide range of irregular buildings and can contribute to the development of building codes and design guidelines for these structures.


Seismic Assessment, Retrofitting, Pushover Analysis, Capacity curves, Irregular buildings, Structural Resilience, Building Codes.

How to Cite this Article?

Kumar, S. M. (2022). Seismic Assessment and Retrofit, Incorporating Pushover Analysis and Capacity Curves of Irregular Buildings. i-manager’s Journal on Structural Engineering, 11(3), 20-31.


[1]. Ahmed, M. M., Abdel Raheem, S. E., Ahmed, M. M., & Abdel Shafy, A. G. (2016). Irregularity effects on the seismic performance of L-shaped multi-story buildings. JES. Journal of Engineering Sciences, 44(5), 513-536.
[2]. Asadi-Ghoozhdi, H., & Attarnejad, R. (2020). The effect of nonlinear soil–structure interaction on the ductility and strength demands of vertically irregular structures. International Journal of Civil Engineering, 18, 1209-1228.
[3]. Branco, M., & Guerreiro, L. M. (2011). Seismic rehabilitation of historical masonry buildings. Engineering Structures, 33(5), 1626-1634.
[4]. Chopra, A. K., & Goel, R. K. (2002). A modal pushover analysis procedure for estimating seismic demands for buildings. Earthquake Engineering & Structural Dynamics, 31(3), 561-582.
[5]. Colapietro, D., Netti, A., Fiore, A., Fatiguso, F., & Marano, G. C. (2014). On the definition of seismic recovery interventions in rc buildings by non-linear static and incremental dynamic analyses. International Journal of Mechanics, 8, 216-222.
[6]. Das, P. K., Dutta, S. C., & Datta, T. K. (2021). Seismic behavior of plan and vertically irregular structures: state of art and future challenges. Natural Hazards Review, 22(2), 04020062.
[7]. De Stefano, M., & Mariani, V. (2014). Pushover analysis for plan irregular building structures. Perspectives on European Earthquake Engineering and Seismology, 34, 429-448.
[8]. Di Sarno, L., & Manfredi, G. (2010). Seismic retrofitting with buckling restrained braces: Application to an existing non-ductile RC framed building. Soil Dynamics and Earthquake Engineering, 30(11), 1279-1297.
[9]. Kreslin, M., & Fajfar, P. (2010). Seismic evaluation of an existing complex RC building. Bulletin of Earthquake Engineering, 8, 363-385.
[10]. Moehle, J., & Deierlein, G. G. (2004, August). A framework methodology for performance-based earthquake engineering. In 13th World Conference on Earthquake Engineering (Vol. 679, pp. 12). WCEE Vancouver.
[11]. Mohod, M. V. (2015). Pushover analysis of structures with plan irregularity. IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE), 12(4), 46-55.
[12]. Montuori, R., Nastri, E., Piluso, V., & Todisco, P. (2020). A simplified performance based approach for the evaluation of seismic performances of steel frames. Engineering Structures, 224, 111222.
[13]. Pujades, L. G., Vargas-Alzate, Y. F., Barbat, A. H., & González-Drigo, J. R. (2015). Parametric model for capacity curves. Bulletin of Earthquake Engineering, 13, 1347-1376.
[14]. Puthanpurayil, A. M., Lavan, O., & Dhakal, R. P. (2020). Multi-objective loss-based optimization of viscous dampers for seismic retrofitting of irregular structures. Soil Dynamics and Earthquake Engineering, 129, 105765.
[15]. Raagavi, M. T., & Sidhardhan, S. (2021). A study on seismic performance of various irregular structure. International Journal of Research in Engineering and Science, 9(5), 12-19.
[16]. Shehu, R. (2021). Implementation of pushover analysis for seismic assessment of masonry towers: Issues and practical recommendations. Buildings, 11(2), 71.
[17]. Themelis, S. (2008). Pushover Analysis for Seismic Assessment and Design of Structures (Doctoral dissertation, Heriot-Watt University).
[18]. Vamvatsikos, D., & Cornell, C. A. (2002). Incremental dynamic analysis. Earthquake Engineering & Structural Dynamics, 31(3), 491-514.
[19]. Zucconi, M., Sorrentino, L., & Ferlito, R. (2017). Principal component analysis for a seismic usability model of unreinforced masonry buildings. Soil Dynamics and Earthquake Engineering, 96, 64-75.
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