Optimization Based Seismic Design of Self-centering Concentrically Braced Frames

Ameer Marzok; Oren Lavan

doi:10.1007/978-3-031-03811-2_80

Optimization Based Seismic Design of Self-centering Concentrically Braced Frames

Ameer Marzok, Oren Lavan

Technion - Israel Institute of Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

This paper presents a design approach for multiple rocking Self-Centering concentrically Braced Frames (SC-CBFs) using a zero-order optimization framework. The objective of the design is to minimize the construction cost of the SC-CBF while satisfying performance constraints. The design space includes the properties of the rocking sections while the elements of the structural system are indirectly considered. In addition, the optimization problem is formulated to eliminate unnecessary rocking sections. Due to the nonlinearity of the optimization problem, an iterative procedure is adopted. Each iteration includes a set of new candidate designs of the system which are a product of the optimization algorithm used. The response of each design is computed using a nonlinear time history analysis (NLTHA) utilizing the Mixed Lagrangian Formalism (MLF). MLF has been shown as an efficient numerical scheme for this type of problem. The proposed methodology has been applied for the seismic design of SC-CBFs with multiple rocking sections. The results show that the optimized structures satisfy the predefined allowable performance levels with reduced construction costs.

Original language	English
Title of host publication	Proceedings of the 10th International Conference on Behaviour of Steel Structures in Seismic Areas - STESSA 2022
Editors	Federico M. Mazzolani, Dan Dubina, Aurel Stratan
Publisher	Springer Science and Business Media Deutschland GmbH
Pages	737-745
Number of pages	9
ISBN (Print)	9783031038105
DOIs	https://doi.org/10.1007/978-3-031-03811-2_80
State	Published - 2022
Event	10th International Conference on the Behaviour of Steel Structures in Seismic Areas, STESSA 2022 - Timisoara, Romania Duration: 25 May 2022 → 27 May 2022

Publication series

Name	Lecture Notes in Civil Engineering
Volume	262 LNCE

Conference

Conference	10th International Conference on the Behaviour of Steel Structures in Seismic Areas, STESSA 2022
Country/Territory	Romania
City	Timisoara
Period	25/05/22 → 27/05/22

Keywords

Concentrically braced frames
Higher mode effects
Multiple rocking systems
Self-centering
Structural optimization

All Science Journal Classification (ASJC) codes

Civil and Structural Engineering

Access to Document

10.1007/978-3-031-03811-2_80

Cite this

Marzok, A., & Lavan, O. (2022). Optimization Based Seismic Design of Self-centering Concentrically Braced Frames. In F. M. Mazzolani, D. Dubina, & A. Stratan (Eds.), Proceedings of the 10th International Conference on Behaviour of Steel Structures in Seismic Areas - STESSA 2022 (pp. 737-745). (Lecture Notes in Civil Engineering; Vol. 262 LNCE). Springer Science and Business Media Deutschland GmbH. https://doi.org/10.1007/978-3-031-03811-2_80

Marzok, Ameer ; Lavan, Oren. / Optimization Based Seismic Design of Self-centering Concentrically Braced Frames. Proceedings of the 10th International Conference on Behaviour of Steel Structures in Seismic Areas - STESSA 2022. editor / Federico M. Mazzolani ; Dan Dubina ; Aurel Stratan. Springer Science and Business Media Deutschland GmbH, 2022. pp. 737-745 (Lecture Notes in Civil Engineering).

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abstract = "This paper presents a design approach for multiple rocking Self-Centering concentrically Braced Frames (SC-CBFs) using a zero-order optimization framework. The objective of the design is to minimize the construction cost of the SC-CBF while satisfying performance constraints. The design space includes the properties of the rocking sections while the elements of the structural system are indirectly considered. In addition, the optimization problem is formulated to eliminate unnecessary rocking sections. Due to the nonlinearity of the optimization problem, an iterative procedure is adopted. Each iteration includes a set of new candidate designs of the system which are a product of the optimization algorithm used. The response of each design is computed using a nonlinear time history analysis (NLTHA) utilizing the Mixed Lagrangian Formalism (MLF). MLF has been shown as an efficient numerical scheme for this type of problem. The proposed methodology has been applied for the seismic design of SC-CBFs with multiple rocking sections. The results show that the optimized structures satisfy the predefined allowable performance levels with reduced construction costs.",

keywords = "Concentrically braced frames, Higher mode effects, Multiple rocking systems, Self-centering, Structural optimization",

author = "Ameer Marzok and Oren Lavan",

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Marzok, A & Lavan, O 2022, Optimization Based Seismic Design of Self-centering Concentrically Braced Frames. in FM Mazzolani, D Dubina & A Stratan (eds), Proceedings of the 10th International Conference on Behaviour of Steel Structures in Seismic Areas - STESSA 2022. Lecture Notes in Civil Engineering, vol. 262 LNCE, Springer Science and Business Media Deutschland GmbH, pp. 737-745, 10th International Conference on the Behaviour of Steel Structures in Seismic Areas, STESSA 2022, Timisoara, Romania, 25/05/22. https://doi.org/10.1007/978-3-031-03811-2_80

Optimization Based Seismic Design of Self-centering Concentrically Braced Frames. / Marzok, Ameer; Lavan, Oren.
Proceedings of the 10th International Conference on Behaviour of Steel Structures in Seismic Areas - STESSA 2022. ed. / Federico M. Mazzolani; Dan Dubina; Aurel Stratan. Springer Science and Business Media Deutschland GmbH, 2022. p. 737-745 (Lecture Notes in Civil Engineering; Vol. 262 LNCE).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AB - This paper presents a design approach for multiple rocking Self-Centering concentrically Braced Frames (SC-CBFs) using a zero-order optimization framework. The objective of the design is to minimize the construction cost of the SC-CBF while satisfying performance constraints. The design space includes the properties of the rocking sections while the elements of the structural system are indirectly considered. In addition, the optimization problem is formulated to eliminate unnecessary rocking sections. Due to the nonlinearity of the optimization problem, an iterative procedure is adopted. Each iteration includes a set of new candidate designs of the system which are a product of the optimization algorithm used. The response of each design is computed using a nonlinear time history analysis (NLTHA) utilizing the Mixed Lagrangian Formalism (MLF). MLF has been shown as an efficient numerical scheme for this type of problem. The proposed methodology has been applied for the seismic design of SC-CBFs with multiple rocking sections. The results show that the optimized structures satisfy the predefined allowable performance levels with reduced construction costs.

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Y2 - 25 May 2022 through 27 May 2022

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Marzok A, Lavan O. Optimization Based Seismic Design of Self-centering Concentrically Braced Frames. In Mazzolani FM, Dubina D, Stratan A, editors, Proceedings of the 10th International Conference on Behaviour of Steel Structures in Seismic Areas - STESSA 2022. Springer Science and Business Media Deutschland GmbH. 2022. p. 737-745. (Lecture Notes in Civil Engineering). doi: 10.1007/978-3-031-03811-2_80

Optimization Based Seismic Design of Self-centering Concentrically Braced Frames

Abstract

Publication series

Conference

Keywords

All Science Journal Classification (ASJC) codes

Access to Document

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