Large Reinforced Concrete Special Moment Frame Beams under Simulated Seismic Loading

2016 ◽  
Vol 113 (3) ◽  
Author(s):  
Tea Visnjic ◽  
Grigorios Antonellis ◽  
Marios Panagiotou ◽  
Jack P. Moehle
Keyword(s):  
Reinforced Concrete ◽  
Seismic Loading ◽  
Moment Frame ◽  
Special Moment Frame

Seismic Strengthening of the Majestic Centre, Wellington, New Zealand

2020 ◽  
pp. 95-126
Author(s):  
Joe White ◽  
Hamish McKenzie
Keyword(s):  
Reinforced Concrete ◽  
New Zealand ◽  
Seismic Performance ◽  
Seismic Loading ◽  
Hollow Core ◽  
Seismic Strengthening ◽  
Moment Frame ◽  
Strengthening Exercise

<p>The Majestic Centre is a 30-storey office tower in the centre of Wellington, New Zealand. The structure has a dual lateral system (reinforced concrete (RC) moment frame + shear cores) and hollow-core floors. The building’s assessed seismic performance was found to be below expected levels, leading to a strengthening exercise. Over a period of 5 years, the structures performance was raised to meet current seismic loading requirements, at a cost of €50M.</p>

scholarly journals Displacement-based design of Reinforced Concrete Special Moment Frame (RC-SMF) with Vertical Irregularity

2019 ◽  
Vol 258 ◽  
pp. 05014
Author(s):  
A F M Salman Akhter ◽  
Yoyong Arfiadi
Keyword(s):  
Reinforced Concrete ◽  
Time History ◽  
Lateral Force ◽  
Time History Analysis ◽  
Force Distribution ◽  
Structural Elements ◽  
Moment Frame ◽  
History Analysis ◽  
Displacement Based ◽  
Special Moment Frame

Reinforced concrete Special Moment Frame (RC-SMF) with irregularity in dimension experiences large inelastic deformation under ground motion. The building code for designing structural elements generally is focused on satisfying the strength and serviceability. On the other hand, the displacement-based design (DBD) procedure is based on building performance level. This paper presents a devoted study of designing structural elements of 8 story RC-SMF with vertical irregularity using the DBD method. This method is mainly using energy-work balance concept with pre-selected yield mechanism and target drift. Moreover, a new lateral force distribution method is used in this study which accounts for inelastic dynamic response and higher mode effects. Strong column-weak beam mechanism is used to design beam and column, and beam moment capacity of each floor is calculated by equating external work to internal work approach. Furthermore, column design strength is taken as the combination of factored gravity loads and maximum expected strength of the beam. The time history analysis results show that story drift is below than the target drift and achieve the desired performance level. Moreover, the results also show lateral force distribution is very close to the lateral shear distribution which obtained from time history analysis.

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