Journal ArticleDOI
Development of a novel cost-effective toggle-brace-curveddamper (TBCD) for mid-rise steel structures using multi-objective NSGA II optimization technique
S. Dehghani,S. F. Fathizadeh,A.R. Vosoughi,E. Noroozinejad Farsangi,Tony Yang,Iman Hajirasouliha +5 more
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TLDR
The proposed TBCD system can be considered as an efficient alternative to conventional seismic force–resisting systems for both newly built structures and the seismic retrofitting of existing structures.Abstract:
Curve-shaped laser-cut steel plate dampers named curved damper have been recently introduced, and their performance has been experimentally investigated through cyclic loading tests. Using the same concept, this study aims to propose a novel cost-effective toggle brace–curved damper (TBCD) system, which combines the toggle braces and curved dampers to provide a practical passive control device. The seismic performance of three-, six-, and nine-story steel moment–resisting structures utilized with TBCD is analyzed using nonlinear time history analysis (NTHA). For better comparison, the TBCD system is optimized using the multi-objective nondominated sorting genetic algorithm (NSGA-II). The seismic performance of the proposed system is then compared against the optimized viscous dampers (VDs), viscoelastic dampers (VEDs), and buckling-restrained braces (BRBs). The results of the optimization process show that the TBCD has comparable performance to the other passive control devices presented, while it leads to more cost-effective design solutions by reducing the constructional, installation, life cycle maintenance and repair cost, and downtime. Hence, the proposed TBCD system can be considered as an efficient alternative to conventional seismic force–resisting systems for both newly built structures and the seismic retrofitting of existing structures.read more
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Journal ArticleDOI
Seismic performance assessment of multi-story steel frames with curved dampers and semi-rigid connections
S. F. Fathizadeh,S. Dehghani,Tony Yang,A.R. Vosoughi,E. Noroozinejad Farsangi,Iman Hajirasouliha +5 more
TL;DR: The results show that the addition of the curved damper has significantly improved the stiffness, strengths and energy dissipation of the CDSRMFs.
Journal ArticleDOI
Performance evaluation of curved damper truss moment frames designed using equivalent energy design procedure
S. Dehghani,S. F. Fathizadeh,Tony Yang,E. Noroozinejad Farsangi,A.R. Vosoughi,Iman Hajirasouliha,Christian Málaga-Chuquitaype,Izuru Takewaki +7 more
TL;DR: The results of this study confirm that CDTMF can be used as an effective seismic force-resisting system.
Journal ArticleDOI
Trade-off Pareto optimum design of an innovative curved damper truss moment frame considering structural and non-structural objectives
S. F. Fathizadeh,S. Dehghani,Tony Yang,E. Noroozinejad Farsangi,A.R. Vosoughi,Iman Hajirasouliha,Izuru Takewaki,Christian Málaga-Chuquitaype,Humberto Varum +8 more
TL;DR: The results of the nonlinear dynamic analysis indicated that the newly proposed CDTMF system can control the roof displacement, story drift, and roof acceleration during an earthquake excitation more efficiently than the recent buckling restrained knee braced truss moment frame systems.
Journal ArticleDOI
Seismic performance assessment of steel frames with slack cable bracing systems
Marziyeh Ghasemi,Marziyeh Ghasemi,Chunwei Zhang,Chunwei Zhang,Chunwei Zhang,Masoud Abedini,Masoud Abedini,Hossein Khorshidi,Hossein Khorshidi,Li Sun +9 more
TL;DR: In this paper, the authors evaluated the effectiveness of adding slack cables to 2, 4, 8, and 12-story steel frames and compared the fragility curves for the structures.
Journal ArticleDOI
Seismic performance assessment of steel frames with slack cable bracing systems
TL;DR: In this article , the authors evaluated the effectiveness of adding slack cables to 2, 4, 8, and 12-story steel frames and compared the fragility curves for the structures.
References
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Journal ArticleDOI
Energy dissipation systems for seismic applications: Current practice and recent developments
Michael D. Symans,Finley A. Charney,Andrew S. Whittaker,Michael C. Constantinou,Charles A. Kircher,Martin W. Johnson,R. J. McNamara +6 more
TL;DR: In this article, the authors present a summary of current practice and recent developments in the application of passive energy dissipation systems for seismic protection of structures, and present a design philosophy for analysis and design of structures employing EDS.
Journal ArticleDOI
Toggle-brace-damper seismic energy dissipation systems
TL;DR: In this article, three new configurations that utilize toggle-brace mechanisms to substantially magnify the effect of damping devices so that they can be utilized effectively in applications of small structural drift are presented.
Journal ArticleDOI
Improved ANN technique combined with Jaya algorithm for crack identification in plates using XIGA and experimental analysis
TL;DR: The results show that the proposed application is able to predict all considered scenarios and accurately identify the crack length and is found to be robust and accurate for crack identification in plates.
Journal ArticleDOI
Structural health monitoring using modal strain energy damage indicator coupled with teaching-learning-based optimization algorithm and isogoemetric analysis
TL;DR: Results clearly indicate that the proposed approach can be used to determine accurately and efficiently both damage location and severity in beam-like structures.
Journal ArticleDOI
Seismic behavior of steel frame with added viscoelastic dampers
TL;DR: In this paper, the authors describe the results of an extensive study on the seismic behavior of a viscoelastically damped structure under mild and strong earthquake ground motions, and the results show that the VE dampers are effective in attenuating seismic structural response.