Seismic Fragility Assessment of Performance-Based Optimum Designed Steel Moment Frame

Dadashi, Hashem; Mohammadi, Majid

doi:10.48303/jsee.2024.2032091.1101

Seismic Fragility Assessment of Performance-Based Optimum Designed Steel Moment Frame

Document Type : Research Note

Authors

Hashem Dadashi ¹

Majid Mohammadi ²

¹ Ph.D. Candidate, International Institute of Earthquake Engineering and Seismology (IIEES), Tehran, Iran

² Professor, Structural Engineering Research Center, International Institute of Earthquake Engineering & Seismology (IIEES), Tehran, Iran

10.48303/jsee.2024.2032091.1101

Abstract

Modeling the nonlinear behavior of structural elements is one of the important parameters for assessing the fragility of steel moment frames. Nonlinearity modeling of structural components is done with two methods: a) distributed plasticity, and b) concentrated plasticity. In distributed plasticity method, the element is considered fibrous and non-linear. In contrast, in concentrated plasticity method, the element is assumed to be elastic and the place of hinges formation is considered at its two ends. To investigate the effect of nonlinear modeling of structural elements on the fragility of steel moment frames a 6-story frame, which is optimally designed with RUPSO algorithm, is considered. The results show that the steel moment frame with concentrated nonlinearity is more fragile than the one with distributed nonlinearity.

Keywords

Steel moment frame

Performance-based optimum design

Distributed and concentrated plasticity

Fragility curves

Subjects

Seismic Vulnerability Assessment and Retrofitting

AISC (2016). AISC 360-16. Specification for Structural Steel Buildings. Chicago: American Institute of Steel Construction.

ASCE41-17 (2017). Seismic Rehabilitation of Existing Buildings. American Society of Civil Engineers.

Dadashi, H., & Mohammadi, M. (2023). Random update particle swarm optimizer (RUPSO): A novel robust optimization algorithm. J. Struct., 56.

Dorigo, M. (1992). Optimization, Learning and Natural Algorithms. Ph.D. Thesis, Dipartimento di Elettronica, Politecnico di Milano, IT.

Eberhart, R.C., & Kennedy, J. (1995). A new optimizer using particle swarm theory. Proceedings of the Sixth International Symposium on Micro Machine and Human Science. NagoyaIEEE Press, 39-43.

Erol, O.K., & Eksin, I. (2006). A new optimization method: big bang-big crunch. Adv. Eng. Softw., 37(2), 106-111.

FEMA (1997). FEMA-302, Nehrp Recommended Provisions for Seismic Regulations for New Buildings and Other Structures. Washington (DC): Federal Emergency Management Agency.

FEMA (2000). FEMA-350 Recommended Seismic Design Criteria for New Steel Moment-Frame Buildings. Washington (DC): Federal Emergency Management Agency.

FEMA (2009). FEMA P695A Recommended Methodology for Quantification of Building System Performance and Response Parameters. Applied Technology Council, Redwood, CA.

Fragiadakis, M., Lagaros, N.D., & Papadrakakis, M. (2006). Performance-based multiobjective optimum design of steel structures considering life-cycle cost. Structural and Multidisciplinary Optimization, 32, 1-11.

Gholizadeh, S., Kamyab, R., & Dadashi, H. (2013). Performance-based design optimization of Steel moment frames. International Journal of Optimization in Civil Engineering, 3, 327-43.

Holland, J.H. (1975). Adaptation in Natural and Artificial Systems, Ann Arbor. University of Michigan Press.

Hosseinpour, F., & Abdelnaby, A.E. (2017). Fragility curves for RC frames under multiple earthquakes. Soil Dynamics and Earthquake Engineering, 98, 222-234.

Kaveh, A., & Mahdavi, V.R. (2014). Colliding bodies Optimization method for optimum design of truss structures with continuous variables. Advances in Engineering Software, 70, 1-12.

Lignos, D.G., Elkady, A., & Walke, S. (2014). Modeling steel moment resisting frames with OpenSEES. OpenSees Workshop, University of California. Berkeley, 26th September.

Lignos, D.G., & Krawinkler, H. (2012). Sideway Collapse of Deteriorating Structural System under Seismic Excitations. Department of Civil and Environmental Engineering Stanford University. Report No 177.

MATLAB (2018). The Language of Technical Computing. Math Works Inc.

Mohammadi, M., Mirzaei, M., & Pashaei, M.R. (2021). Seismic performance and fragility analysis of infilled steel frame structures using a new multi-strut model. Structures, 34, 1403-1415.

OpenSees Version 3.2.2 [Computer Software]. PEER, Berkeley, CA.

Road, Housing and Urban Development Research Center (BHRC).

Vamvatsikos, D., & Cornell, C.A. (2002). Incremental dynamic analysis. Earthquake Engineering & Structural Dynamics, 31(3), 491-514.