scholarly journals A 2D beam‐column joint macro‐element for the nonlinear analysis of RC frames

2020 ◽  
Author(s):  
Bartolomeo Pantò ◽  
Salvatore Caddemi ◽  
Ivo Caliò ◽  
Enrico Spacone
Keyword(s):  
Nonlinear Analysis ◽  
Rc Frames ◽  
Column Joint ◽  
Macro Element

scholarly journals Moment Capacity Ratio at Column – Beam Joint in a RC Framed Structure

2020 ◽  
Vol 6 (3) ◽  
pp. 1-7
Author(s):  
Jawala Kumar ◽  
Mr. Varun Kumar Sikka
Keyword(s):  
Reliability Index ◽  
Moment Capacity ◽  
Capacity Ratio ◽  
Rc Frames ◽  
A Value ◽  
Seismic Location ◽  
Column Joint ◽  
The Moment ◽  
National Disaster ◽  
Type Of Failure

Beam-column joint is the gap in the modern ductile design of building. Especially under the earthquake loading this is more susceptible to damage. Due to brittle nature of failure this type of failure cannot be afford. Since 1970’s this areas is under the light of research, but with the paper of Park and Paul, It got momentum. But still due to versatile nature of the joints core behaviour, the problem is still persisting. Though many international codes recommend the moment capacity ratio at beam column joint to be more than one, There are discrepancies among the major international codes with regard to MCR. Indian standard codes for design of RC framed buildings are silent on this aspect. Draft 13920 (2014) code suggests a value of MCR similar to other international codes without proper theoretical basis. Hence a rational study is required on the values of MCR. A computationally attractive procedure for calculating flexural capacity of column developed for determining MCR at a beam-column joint. To reach at an appropriate and acceptable MCR for capacity design of RC framed building reliability based approach is done. This research deals with the fragility and reliability analysis of five, seven and ten storey RC frames designed using various values of MCR ranging from 1.0 to 3.2. The RC frames are designed as per IS 1893 (2002) for all seismic zones. Hazard curves required of various seismic location in India (like zone II, III, IV and V) has been selected from National Disaster Management Authority, Government of India. Seismic risk assessment of all the designed buildings is conducted and based on the achieved Reliability Index and the Target Reliability Index minimum value of Moment Capacity Ratio (MCR) is suggested.

Nonlinear Analysis of Full-Scale Beam-Column Joints of RC Frames

2012 ◽  
Vol 446-449 ◽  
pp. 811-815
Author(s):  
Er Wei Guo ◽  
Zhen Bao Li ◽  
Hua Ma ◽  
Hong Yu Zhou ◽  
Xiu Li Du ◽  
...  
Keyword(s):  
Nonlinear Analysis ◽  
Full Scale ◽  
Rc Frames

Seismic Performance Evaluation and Strengthening of RC Frames with Substandard Beam-Column Joint: Lessons Learned from the 2013 Bohol Earthquake

2016 ◽  
Vol 10 (03) ◽  
pp. 1640007 ◽  
Author(s):  
Yuebing Li ◽  
Yasushi Sanada ◽  
Susumu Takahashi ◽  
Koki Maekawa ◽  
Ho Choi ◽  
...  
Keyword(s):  
Seismic Performance ◽  
Strengthening Mechanism ◽  
The Philippines ◽  
Lessons Learned ◽  
Seismic Evaluation ◽  
Scaled Model ◽  
Seismic Performance Evaluation ◽  
Rc Frames ◽  
Column Joint ◽  
Wing Walls

On October 15, 2013, a magnitude 7.1 earthquake severely damaged buildings on Bohol Island, the Philippines. This paper briefly reports on the typical damage to reinforced concrete (RC) buildings observed in the authors’ post-earthquake investigation. The current study focuses on the seismic performance of an earthquake-damaged building with exterior beam-column joint failure. Cyclic loading tests were conducted to propose a practical seismic strengthening method by installing RC wing walls for substandard moment-resisting frames with brittle beam-column joints. A scaled model representing the earthquake-damaged frame reproduced the damage to the exterior beam-column joint, which could not be evaluated using Japanese seismic evaluation methods because of an overestimation of the joint performance. Another specimen strengthened by the proposed method was successfully upgraded, forming a ductile beam yielding mechanism. The ultimate strength of the upgraded specimen estimated by the Japanese methods agreed well with the experimental results. The strengthening mechanism by wing walls was elucidated, knowledge of which will be useful for future applications to substandard buildings in developing countries.

Nonlinear Analysis of Full-Scale Beam-Column Joints of RC Frames

2012 ◽  
Vol 446-449 ◽  
pp. 811-815
Author(s):  
Er Wei Guo ◽  
Zhen Bao Li ◽  
Hua Ma ◽  
Hong Yu Zhou ◽  
Xiu Li Du ◽  
...  
Keyword(s):  
Finite Element ◽  
Nonlinear Analysis ◽  
Full Scale ◽  
Finite Element Software ◽  
Rc Frames ◽  
Fracture Development ◽  
Load Carrying ◽  
Concrete Damage ◽  
Strain Relationship ◽  
Core Areas

In order to research on seismic performance of full-scale beam-column joints of RC frames under low cyclic loading, finite element software ABAQUS is used to nonlinear analysis. Analysis results show that: the process of load carrying and fracture development of beam-column joints are simulated using concrete damage plasticity model; nonlinear finite element method is easy to obtain stress-strain relationship; and can effective analyses the complex mechanical behavior of core areas of joints.

An equilibrated macro-element for nonlinear analysis of masonry structures

2014 ◽  
Vol 70 ◽  
pp. 82-93 ◽  
Author(s):  
Daniela Addessi ◽  
Alessandro Mastrandrea ◽  
Elio Sacco
Keyword(s):  
Nonlinear Analysis ◽  
Masonry Structures ◽  
Macro Element
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