62 research outputs found
Seismic reliability analysis and estimation of multilevel response modification factor for steel diagrid structural systems
Diagrid systems are emerging as one of the structurally efficient and architecturally aesthetic solutions for tall buildings. Despite the fact that such systems are increasingly used in modern construction, current literature lacks detailed information regarding their structural behaviour and seismic design parameters to ensure satisfactory performance under different earthquake intensity levels. This study aims to assess the seismic reliability of diagrid structural systems and develop more efficient performance-based design methodologies. Demand and supply response modification factors are calculated for 16, 24 and 32-storey buildings with diagrid structural systems using 65° diagrid angle and designed in compliance with current standards under a set of 12 spectrum compatible earthquakes. The results are then used to develop a novel multi-level response modification factor (R-Factor) for diagrid structural systems as a function of site seismicity and acceptable damage level. Subsequently, comprehensive seismic reliability analyses are conducted to assess the seismic performance of the selected structures under intensity levels corresponding to DBE and MCE hazard levels (earthquake scenarios with return periods of 475 and 2475 years, respectively). In general, results of this study demonstrate acceptable seismic performance and reliability of steel diagrid systems. It is shown that even using an R-Factor equal to 4 in the seismic design process could ensure that diagrid structures remain in a performance level higher than Life Safety (LS) for both DBE and MCE hazard levels. Multi-level response modification factors proposed in this study can be directly used in performance-based design of diagrid structures to satisfy different performance targets under any seismic hazard level
Influence of shape memory alloy brace design parameters on seismic performance of self‐centering steel frame buildings
Analysis of steel special moment frames including damaged column subjected to far and near-field ground motions
11.25: Rocking damage-free steel column base with friction devices: Design procedure and global seismic response of buildings
Comparative study on the effect of outrigger on seismic response of tall buildings with braced and Wall Core. II: Determining seismic design parameters
Simplified optimal design of MDOF structures with negative stiffness amplifying dampers based on effective damping
Near‐collapse response of existing RC building under severe pulse‐type ground motion using hybrid simulation
Fragility Evaluation in Building-Piping Systems: Effect of Piping Interaction With Buildings
Laboratory and computer simulations of reinforced concrete frames with different ductility
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