Seismic behavior of preloaded rectangular RC columns strengthened with precambered steel plates under high axial load ratios

2017 ◽  
Vol 152 ◽  
pp. 683-697 ◽  
Author(s):  
L. Wang ◽  
R.K.L. Su ◽  
B. Cheng ◽  
L.Z. Li ◽  
L. Wan ◽  
...  
Keyword(s):  
Axial Load ◽  
Seismic Behavior ◽  
Steel Plates ◽  
Rc Columns

Review on Seismic Behavior of RC Columns

2013 ◽  
Vol 353-356 ◽  
pp. 2092-2096
Author(s):  
Yong Ping Xie ◽  
Lei Jia ◽  
Gang Sun
Keyword(s):  
Axial Load ◽  
Seismic Behavior ◽  
Large Scale ◽  
Load Ratio ◽  
Concrete Columns ◽  
Shear Capacity ◽  
Economic Damage ◽  
Rc Columns ◽  
Axial Load Ratio ◽  
Mode Of Failure

Column is the key member of the seismic structures, after the earthquake destroyed, not only cause column serious economic damage, and will cause a large number of casualties. For studying the seismic behavior and size effect of full-scale reinforced concrete columns. A comprehensive summary of the experimental results is undertaken to evaluate the seismic behavior of RC concrete columns, including test equipment and load method and mode of failure and Seismic behavior. It is concluded that the ductility and shear capacity of RC mainly depends on shear span ratio, axial load ratio and stirrup ratio. But the seismic behavior of large scale RC columns has no systematic studied.

Numerical Study on Seismic Behavior of Composite Shear Walls with Steel-Encased Profiles Subjected to Different Axial Load

2021 ◽  
Vol 26 (4) ◽  
pp. 04021034
Author(s):  
Amirhoshang Akhaveissy ◽  
Kambiz Daneshvar ◽  
Dina Ghazi-Nader ◽  
Morteza Amooie ◽  
Mohammad Javad Moradi
Keyword(s):  
Axial Load ◽  
Seismic Behavior ◽  
Numerical Study ◽  
Shear Walls ◽  
Composite Shear

EFFECT OF ASPECT RATIO ON THE BEHAVIOR OF GFRP-RC CIRCULAR COLUMNS UNDER SIMULATED SEISMIC LOADING

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Amr Elsayed Mohammed Abdallah ◽  
Ehab Fathy El-Salakawy
Keyword(s):  
Aspect Ratio ◽  
Axial Load ◽  
Load Capacity ◽  
Load Level ◽  
Experimental Results ◽  
Rc Columns ◽  
Drift Capacity ◽  
Glass Fiber Reinforced ◽  
Axial Load Capacity ◽  
Code Provisions

The mechanical and physical properties of glass fiber-reinforced polymer (GFRP) reinforcement are different from steel, which requires independent code provisions for GFRP-reinforced concrete (RC) members. The currently available code provisions for GFRP-RC members still need more research evidence to be inclusive. For example, the available provisions for confinement reinforcement of FRP-RC columns do not consider the effects of column aspect ratio, which is not yet supported by any available research data. In this study, two full-scale spirally reinforced GFRP-RC circular columns were constructed and tested under concurrent seismic and axial loads. Both specimens had an aspect ratio (shear span-to-diameter ratio) of 7.0, while other two specimens with an aspect ratio of 5.0, from a previous stage of this study, were included for comparison purposes. For each aspect ratio, each specimen was loaded under one of two levels of axial load; 20 or 30% of the axial load capacity of the column section. All test specimens had a 35 MPa concrete compressive strength, 350-mm diameter, 85-mm spiral pitch and 1.2% longitudinal reinforcement ratio. The experimental results were analyzed in terms of hysteretic response, drift capacity and inelastic deformability hinge length. Based on the experimental results, it can be concluded that the aspect ratio affects the magnitude of secondary moments and inelastic deformability hinge length. In addition, the aspect ratio may affect drift capacity of GFRP-RC columns, depending on axial load level.

Short reinforced concrete column capacity under biaxial bending and axial load

2000 ◽  
Vol 27 (6) ◽  
pp. 1173-1182 ◽  
Author(s):  
H P Hong
Keyword(s):  
Reinforced Concrete ◽  
Probabilistic Analysis ◽  
Axial Load ◽  
Failure Surface ◽  
Biaxial Bending ◽  
Reinforced Concrete Column ◽  
Rc Columns ◽  
Nonlinear Stress ◽  
Modeling Errors ◽  
Error Optimization

The paper describes the development of a simple theoretical approach in estimating the capacity of short reinforced concrete (RC) columns under biaxial bending and axial load. The developed approach considers the nonlinear stress-strain relations of concrete and reinforcing steel and does not make the assumption about the limiting strain of extreme compression fiber of concrete. The solution is obtained using a nonlinearly constrained optimization algorithm. The approach was used to estimate the theoretical capacities of many tested RC columns found in the literature. A probabilistic analysis of the modeling errors was carried out using the ratios of the test-to-predicted results. The probabilistic analysis was extended to include two simplified theoretical methods: the reciprocal load method given by Bresler and the failure surface method given by Hsu.Key words: biaxial bending, modeling error, optimization, probability distribution.

Analytical prediction of seismic behavior of RC joints and columns under varying axial load

2018 ◽  
Vol 174 ◽  
pp. 792-813 ◽  
Author(s):  
Javad Shayanfar ◽  
Habib Akbarzadeh Bengar ◽  
Azadeh Parvin
Keyword(s):  
Axial Load ◽  
Seismic Behavior ◽  
Analytical Prediction

Compressive Stiffness Verification of Stirrup Rubber Bearing

2004 ◽  
Author(s):  
Bo-Jen Chen ◽  
C. S. Tsai ◽  
Tsu-Cheng Chiang
Keyword(s):  
Axial Load ◽  
Horizontal Plane ◽  
Steel Plates ◽  
Computational Results ◽  
Lateral Expansion ◽  
Pressure Function ◽  
Rubber Bearing ◽  
Compression Stiffness ◽  
Bearing System ◽  
Good Agreement

In recent years, there has been an immense amount of interest in utilizing the rubber bearing system as a practical approach to seismic-resistant design. The stirrup rubber bearing is confined and bonded by stirrup equipments so as to restrict the lateral expansion of the rubbers due to axial load and increase the compression stiffness. Based on two kinematics assumptions that the horizontal plane parallel to the stirrup equipments or rigid bounding steel plates remains plane and the vertical lines become parabolic after loading, the pressure function and compression stiffness for the stirrup rubber bearing are derived. A good agreement between experimental results by the component tests and computational results by the proposed formulae has been obtained.

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