11.32: Linked columns with friction dampers as a technique for seismic retrofit of steel moment resisting frames

ce/papers ◽  
2017 ◽  
Vol 1 (2-3) ◽  
pp. 3092-3099
Author(s):  
Georgi Bonchev ◽  
Borislav Belev ◽  
Imad Mualla
Keyword(s):  
Seismic Retrofit ◽  
Friction Dampers ◽  
Steel Moment Resisting Frames ◽  
Moment Resisting Frames ◽  
Moment Resisting

scholarly journals Performance-Based Multiobjective Optimal Seismic Retrofit Method for a Steel Moment-Resisting Frame Considering the Life-Cycle Cost

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Hyo Seon Park ◽  
Dong Chul Lee ◽  
Byung Kwan Oh ◽  
Se Woon Choi ◽  
Yousok Kim
Keyword(s):  
Seismic Performance ◽  
Life Cycle Cost ◽  
Optimization Technique ◽  
Seismic Retrofit ◽  
Seismic Damage ◽  
Damage Cost ◽  
Pareto Solution ◽  
Steel Moment Resisting Frames ◽  
Moment Resisting Frames ◽  
Moment Resisting

This study proposes a performance-based multiobjective optimization seismic retrofit method for steel moment-resisting frames. The brittle joints of pre-Northridge steel moment-resisting frames are retrofitted to achieve ductility; the method involves determining the position and number of connections to be retrofitted. The optimal solution is determined by applying the nondominated sorting genetic algorithm-II (NSGA-II), which acts as a multiobjective seismic retrofit optimization technique. As objective functions, the initial cost for the connection retrofit and lifetime seismic damage cost were selected, and a seismic performance level below the 5% interstory drift ratio was employed as a constraint condition. The proposed method was applied to the SAC benchmark three- and nine-story buildings, and several Pareto solutions were obtained. The optimized retrofit solutions indicated that the lifetime seismic damage cost decreased as the initial retrofit cost increased. Although every Pareto solution existed within a seismic performance boundary set by a constraint function, the seismic performance tended to increase with the initial retrofit cost. Analysis and economic assessment of the relations among the initial retrofit cost, lifetime seismic damage cost, total cost, and seismic performance of the derived Pareto solution allow building owners to make seismic retrofit decisions more rationally.

Performance-based assessment of seismic-resilient steel moment resisting frames equipped with innovative column base connections

Structures ◽  
2021 ◽  
Vol 32 ◽  
pp. 1646-1664
Author(s):  
Elena Elettore ◽  
Annarosa Lettieri ◽  
Fabio Freddi ◽  
Massimo Latour ◽  
Gianvittorio Rizzano
Keyword(s):  
Steel Moment Resisting Frames ◽  
Moment Resisting Frames ◽  
Performance Based Assessment ◽  
Moment Resisting ◽  
Base Connections ◽  
Column Base

Collapse risk of pre-Northridge tall steel moment-resisting frames in the Seattle basin during large-magnitude subduction earthquakes

2021 ◽  
Vol 244 ◽  
pp. 112751
Author(s):  
Carlos Molina Hutt ◽  
Shervin Zahedimazandarani ◽  
Nasser A. Marafi ◽  
Jeffrey W. Berman ◽  
Marc O. Eberhard
Keyword(s):  
Large Magnitude ◽  
Steel Moment Resisting Frames ◽  
Moment Resisting Frames ◽  
Subduction Earthquakes ◽  
Moment Resisting
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