Seismic rehabilitation of gravity load-designed interior RC beam-column joints using ECC-infilled steel cylinder shell

Structures ◽  
2021 ◽  
Vol 34 ◽  
pp. 1212-1228
Author(s):  
Huiya Qian ◽  
Junchao Guo ◽  
Xiuming Yang ◽  
Feng Lin
Keyword(s):  
Rc Beam ◽  
Steel Cylinder ◽  
Seismic Rehabilitation ◽  
Gravity Load

Seismic Rehabilitation of Corner RC Beam-Column Joints Using CFRP Composites

2010 ◽  
Vol 14 (6) ◽  
pp. 681-692 ◽  
Author(s):  
Saleh H. Alsayed ◽  
Tarek H. Almusallam ◽  
Yousef A. Al-Salloum ◽  
Nadeem A. Siddiqui
Keyword(s):  
Rc Beam ◽  
Seismic Rehabilitation ◽  
Cfrp Composites

Crack assessment of RC beam-column joints subjected to cyclic lateral loading using Acoustic Emission (AE): The influence of shear links aspect

2020 ◽  
Author(s):  
Reventheran Ganasan ◽  
Chee Ghuan Tan ◽  
Zainah Ibrahim ◽  
Norazura Muhamad Bunnori ◽  
Fadzli Mohamed Nazri ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Concrete Cover ◽  
Lateral Loading ◽  
Rc Beam ◽  
Shear Reinforcement ◽  
Gravity Load ◽  
Moderate Earthquake ◽  
Column Joint ◽  
Cracks Propagation ◽  
Moderate Seismic Regions

Existing reinforced concrete (RC) beam-column joints that are designed mainly to resist gravity load, may encounter serious problems in low to moderate seismic regions. The moderate earthquake in Ranau affected numerous old buildings, caused by uncontrolled cracks propagation found in RC member, beam-column joint. Effects of the shear reinforcement between offset links on cracks formation on RC beam-column joints were investigated under cyclic lateral loading with acoustic emission (AE) technique monitoring. The control specimen (BCJ-1) without additional shear reinforcement showed more irregular cracks thus concrete cover spall observed at early DR level compared to other specimens with shear reinforcement between offset links. Sudden drop of AE hits beyond 2.25% DR level with significant increase in crack width showed that BCJ-1 was no longer able to resist higher loads due to de-bonding between reinforcement and concrete. From RA-AF graphs, failure was exhibited according to DR stages with respect to crack characteristics.

Review of Existing Precast Concrete Gravity Load Floor Framing Systems

PCI Journal ◽  
1995 ◽  
Vol 40 (2) ◽  
pp. 52-68 ◽  
Author(s):  
Stephen Pessiki ◽  
Richard Prior ◽  
Richard Sause ◽  
Sarah Slaughter
Keyword(s):  
Precast Concrete ◽  
Gravity Load

Control Algorithms for Inductors Movement in Induction Heated Calenders

2012 ◽  
Vol 17 (4) ◽  
pp. 51-57
Author(s):  
Andrzej Frązyk ◽  
Piotr Urbanek ◽  
Jacek Kucharski
Keyword(s):  
Temperature Profile ◽  
Induction Heating ◽  
Control Algorithms ◽  
Uniform Temperature ◽  
Cylinder Axis ◽  
Steel Cylinder ◽  
Modern Technologies ◽  
Temperature Amplitude

Abstract Fixed, placed at regular distances inductors for induction heating of a rotating steel cylinder do not provide sufficiently uniform temperature profile along cylinder axis required by modern technologies,. The article examines the influence of inductors movement along the cylinder axis on the reduction of pick-to- pick temperature amplitude.

scholarly journals Fatigue Stress-Life Model of RC Beams Based on an Accelerated Fatigue Method

2019 ◽  
Vol 4 (2) ◽  
pp. 16
Author(s):  
Eljufout ◽  
Toutanji ◽  
Al-Qaralleh
Keyword(s):  
Cyclic Loading ◽  
Fatigue Testing ◽  
Three Dimensional ◽  
Rc Beam ◽  
Rc Beams ◽  
Testing Methods ◽  
Load Range ◽  
Fatigue Stress ◽  
Life Model ◽  
Prediction Band

Several standard fatigue testing methods are used to determine the fatigue stress-life prediction model (S-N curve) and the endurance limit of Reinforced Concrete (RC) beams, including the application of constant cyclic tension-tension loads at different stress or strain ranges. The standard fatigue testing methods are time-consuming and expensive to perform, as a large number of specimens is needed to obtain valid results. The purpose of this paper is to examine a fatigue stress-life predication model of RC beams that are developed with an accelerated fatigue approach. This approach is based on the hypothesis of linear accumulative damage of the Palmgren–Miner rule, whereby the applied cyclic load range is linearly increased with respect to the number of cycles until the specimen fails. A three-dimensional RC beam was modeled and validated using ANSYS software. Numerical simulations were performed for the RC beam under linearly increased cyclic loading with different initial loading conditions. A fatigue stress-life model was developed that was based on the analyzed data of three specimens. The accelerated fatigue approach has a higher rate of damage accumulations than the standard testing approach. All of the analyzed specimens failed due to an unstable cracking of concrete. The developed fatigue stress-life model fits the upper 95% prediction band of RC beams that were tested under constant amplitude cyclic loading.

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