Fire Behavior and Modeling of Short RC Columns in Pure Axial Compression: Role of Volume, Configuration, and Spacing of Lateral Reinforcement

2022 ◽  
Vol 148 (1) ◽  
Author(s):  
Hemanth Kumar Chinthapalli ◽  
Shivam Sharma ◽  
Anil Agarwal
Keyword(s):  
Axial Compression ◽  
Fire Behavior ◽  
Rc Columns ◽  
Lateral Reinforcement

The Role of Heat Extinction Depth Concept to Fire Behavior: An Application to WRF-SFIRE Model

2016 ◽  
pp. 137-142 ◽  
Author(s):  
S. Kartsios ◽  
Theodore S. Karacostas ◽  
I. Pytharoulis ◽  
A. P. Dimitrakopoulos
Keyword(s):  
Fire Behavior ◽  
Extinction Depth

Axial Compression Test of RC Columns Consolidation with BFRP

2012 ◽  
Vol 166-169 ◽  
pp. 881-884
Author(s):  
Bao Rong Huo ◽  
Xiang Dong Zhang
Keyword(s):  
Comparative Study ◽  
Bearing Capacity ◽  
Axial Compression ◽  
Calculation Formula ◽  
Rc Columns ◽  
Displacement Ductility ◽  
Rc Column ◽  
Ductility Factor ◽  
Increase Rate ◽  
The Comparative Study

12 RC columns were made, including nine RC columns wrapped with BFRP, three RC columns without any reinforcement, to conduct the comparative study of axial compression. The result shows that the bearing capacity of the RC columns reinforced with the fibers increases obviously.The displacement ductility factor increases, but its increase rate becomes slow with increasing layers of fiber cloth, so the most economical layer number is 3. Based on the confinement mechanism of FRP cloth and the calculation formula of the bearing capacity for common RC column, the formula of the bearing capacity for reinforced RC column with BFRP cloth is proposed. The result of calculation basically tallies with the number in experiment.

Loading Correlation for Reliability Analysis of Reinforced Concrete Columns

2011 ◽  
Vol 243-249 ◽  
pp. 396-405
Author(s):  
Chang Hui Tang ◽  
You Cheng Yang
Keyword(s):  
Reinforced Concrete ◽  
Reliability Analysis ◽  
Axial Compression ◽  
Limit State ◽  
Mathematical Expression ◽  
State Function ◽  
Load Path ◽  
Rc Columns ◽  
Correlation Relationship ◽  
Load Effects

A major difficulty in reliability analysis of reinforced concrete (RC) columns subjected to both axial compression and bending moments is the interaction between strength of bending and axial compression. In particular, the limit state function cannot be explicitly expressed due to this interaction. This paper analyzes the correlation between load effects. Given the calibration point, a mathematical expression for the load correlation, rMN, in terms of eccentricity of dead load and live load, eG and eQ, is established, which physically clarifies the relationship of rMN with load path. Given the ratio of eccentricity k = eG/eQ and the ratio of load effects r, the reliability analysis for RC columns with considering the correlation between load effects can be analyzed by using the correlation relationship proposed in this study and FORM method. This study provides an effective and practical approach to the reliability analysis.

DETERMINATION OF LOAD TRANSMISSION AND CONTACT FORCE AT FACET JOINTS OF L2–L3 MOTION SEGMENT USING FE METHOD

2003 ◽  
Vol 07 (02) ◽  
pp. 97-109 ◽  
Author(s):  
E. C. Teo ◽  
K. K. Lee ◽  
H. W. Ng ◽  
T. X. Qiu ◽  
K. Yang
Keyword(s):  
Axial Compression ◽  
Contact Force ◽  
Fe Model ◽  
Percentage Increase ◽  
Facet Joints ◽  
Fe Method ◽  
Load Transmission ◽  
Motion Segment

In the human spine, it is well known that facet joints play a significant role in load transmission and providing stability. It has also been hypothesized to be one of most probable sources of low back pain. Experimental determination of the load-bearing role of lumbar intervertebral joints, such as the facets joints, under axial compression has not been a straightforward task. In this study, the role of the facets in load transmission through a L2–L3 motion segment under axial compression is investigated using a L2–L3 finite element (FE) model, incorporated with an accurate three-dimensional geometry of facet joints with the inclusion of surface-to-surface continuum contact representation. The effects of osteoarthritis on facet force and biomechanical behaviors are also investigated by assuming friction at the facet joints. The study shows that the facet joints resisted 8% more in load for joints with osteoarthritics as compared with the normal joints. High percentage increase in contact facet force was also predicted for joint with osteoarthritics deformity. The use of the analytical FE model provided yet another efficient alternative for predicting the load transmission and contact force for degenerative joints, so as to provide a better understanding of the biomechanics of the spine as well as the pathophysiology of the various spinal disorders and degenerative conditions.

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