Analytical Study on Steel Plate Reinforcement Effect at Beam-Column Joints in Reinforced Concrete Frame

2016 ◽  
Vol 16 (1) ◽  
pp. 23-28
Author(s):  
Yang Yang ◽  
Keunyeong Oh ◽  
Sungbin Hong ◽  
Jaehyuk So ◽  
Kangmin Lee
Keyword(s):  
Reinforced Concrete ◽  
Analytical Study ◽  
Steel Plate ◽  
Reinforcement Effect ◽  
Reinforced Concrete Frame ◽  
Concrete Frame

scholarly journals The effects of Steel Plate Shear Wall on Residual Capacity of Reinforced Concrete Frame under Sequence Earthquakes by Incremental Dynamic Analysis

2021 ◽  
Author(s):  
Hamze Rouhi ◽  
Majid Gholhaki
Keyword(s):  
Reinforced Concrete ◽  
Dynamic Analysis ◽  
Steel Plate ◽  
Shear Wall ◽  
Seismic Sequence ◽  
Reinforced Concrete Frame ◽  
Steel Plate Shear Wall ◽  
Concrete Frame ◽  
Tall Structures ◽  
Residual Capacity

Abstract The residual capacity of a damaged structure after the main earthquake is equal to the smallest spectral acceleration of the first mode, which causes local or general failure during the aftershock. In this research, the effect of steel plate shear wall on residual capacity of the reinforced concrete frame under seismic sequence has been investigated. Based on this, four systems of 4, 8, 12, and 24 stories, which represent short, intermediate, tall, are modeled in finite element software and subject to three sets of single and real seismic sequence, taking into account the damage, the effects of mainshock earthquakes have been analyzed under aftershock earthquakes nonlinear increment dynamic analysis (IDA). The analysis showed that in the real seismic sequence, the residual capacity of a reinforced concrete frame with steel plate shear wall in short and intermediate structures on average 3.6 times and tall structures up to 4.25 times compared to the residual capacity of the reinforced concrete frame without steel plate shear wall. Also, in the real seismic sequence, the residual capacity of the structure decreased with increasing the height of short to intermediate structures and intermediate to tall structures, so that this capacity reduction decreased by an average of 70% in reinforced concrete frame with and without steel plate shear wall.

scholarly journals Floors number influence on the instability parameter of reinforced concrete frame-braced buildings

2019 ◽  
Vol 12 (5) ◽  
pp. 1034-1057
Author(s):  
R. J. ELLWANGER
Keyword(s):  
Reinforced Concrete ◽  
Analytical Study ◽  
Shear Stiffness ◽  
Physical Nonlinearity ◽  
Reinforced Concrete Frame ◽  
Lateral Deflection ◽  
Order Analysis ◽  
Concrete Frame ◽  
Instability Parameter ◽  
Method Accuracy

Abstract This work aims to investigate the floors number influence on the instability parameter limit α1 of reinforced concrete frame-braced buildings; it succeeds another work in this field of knowledge, in which the same question was investigated for wall- and core-braced buildings. Initially, it is showed how the ABNT NBR 6118:2014 (Brazilian code for concrete structures design) defines when a second order analysis is needed. Topics concerning to physical nonlinearity consideration and to the lateral deflection components of frames are also presented. It follows an analytical study that led to the derivation of a method for determining the limit α1 as a function of the floors number and the relation between bending and shear stiffness. Finally, some examples are presented and their results are used for checking the method accuracy.

scholarly journals Shear Behavior of a Reinforced Concrete Frame Retrofitted with a Hinged Steel Damping System

2020 ◽  
Vol 12 (24) ◽  
pp. 10360
Author(s):  
Hyun-Do Yun ◽  
Sun-Woong Kim ◽  
Wan-Shin Park ◽  
Sun-Woo Kim
Keyword(s):  
Reinforced Concrete ◽  
Shear Behavior ◽  
Seismic Retrofitting ◽  
Reinforced Concrete Frame ◽  
Main Research ◽  
Torsion Spring ◽  
Concrete Frame ◽  
Energy Dissipation Capacity ◽  
Research Questions ◽  
Torsion Springs

The purpose of this study was to experimentally evaluate the effect of a hinged steel damping system on the shear behavior of a nonductile reinforced concrete frame with an opening. For the experimental test, a total of three full-scale reinforced concrete frame specimens were planned, based on the “no retrofitting” (NR) specimens with non-seismic details. The main research questions were whether the hinged steel damping system is reinforced and whether torsion springs are installed in the hinged steel damping system. From the results of the experiment, the hinged steel damping system (DR specimen) was found to be effective in seismic retrofitting, while isolating the opening of the reinforced concrete (RC) frame, and the torsion spring installed at the hinged connection (DSR specimen) was evaluated to be effective in controlling the amount of deformation of the upper and lower dampers. The strength, stiffness, and energy dissipation capacity of the DSR specimen were slightly improved compared to the DR specimen, and it was confirmed that stress redistribution was induced by the rotational stiffness of the torsion spring installed in the hinge connection between the upper and lower frames.

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