Semiactive Control of Floor Systems

2009 ◽  
Author(s):  
A. Ebrahimpour ◽  
W.N. Patten ◽  
R.L. Sack ◽  
A. Hamam ◽  
H.J. Shui
Keyword(s):  
Semiactive Control ◽  
Floor Systems

scholarly journals Development of Optimal Design Method for Steel Double-Beam Floor System Considering Rotational Constraints

2021 ◽  
Vol 11 (7) ◽  
pp. 3266
Author(s):  
Insub Choi ◽  
Dongwon Kim ◽  
Junhee Kim
Keyword(s):  
Optimal Design ◽  
Design Process ◽  
Design Method ◽  
Steel Beams ◽  
High Gravity ◽  
Double Beam ◽  
Iterative Analysis ◽  
Floor Systems ◽  
Optimal Design Method ◽  
Floor System

Under high gravity loads, steel double-beam floor systems need to be reinforced by beam-end concrete panels to reduce the material quantity since rotational constraints from the concrete panel can decrease the moment demand by inducing a negative moment at the ends of the beams. However, the optimal design process for the material quantity of steel beams requires a time-consuming iterative analysis for the entire floor system while especially keeping in consideration the rotational constraints in composite connections between the concrete panel and steel beams. This study aimed to develop an optimal design method with the LM (Length-Moment) index for the steel double-beam floor system to minimize material quantity without the iterative design process. The LM index is an indicator that can select a minimum cross-section of the steel beams in consideration of the flexural strength by lateral-torsional buckling. To verify the proposed design method, the material quantities between the proposed and code-based design methods were compared at various gravity loads. The proposed design method successfully optimized the material quantity of the steel double-beam floor systems without the iterative analysis by simply choosing the LM index of the steel beams that can minimize objective function while satisfying the safety-related constraint conditions. In particular, under the high gravity loads, the proposed design method was superb at providing a quantity-optimized design option. Thus, the proposed optimal design method can be an alternative for designing the steel double-beam floor system.

Methods for the vibration analysis of reinforced concrete precast one-way joist slab floor systems under human walking

2021 ◽  
pp. 103217
Author(s):  
Omar Caballero-Garatachea ◽  
Gelacio Juárez-Luna ◽  
Manuel Eurípides Ruiz Sandoval-Hernández
Keyword(s):  
Reinforced Concrete ◽  
Vibration Analysis ◽  
Human Walking ◽  
Floor Systems
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