Effect of Axial Load and Web Reinforcement Ratio on Seismic Behavior of GFRP-RC Squat Walls

2021 ◽  
Author(s):  
Islam Shabana ◽  
Ahmed Sabry Farghaly ◽  
Brahim Benmokrane
Keyword(s):  
Axial Load ◽  
Seismic Behavior ◽  
Reinforcement Ratio ◽  
Web Reinforcement ◽  
Squat Walls

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

Seismic behavior of reinforced concrete squat walls with high strength reinforcements: An experimental study

2019 ◽  
Vol 20 (3) ◽  
pp. 911-931 ◽  
Author(s):  
Xiao‐Lei Chen ◽  
Jian‐Ping Fu ◽  
Xin Hao ◽  
Hong Yang ◽  
De‐Yi Zhang
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Seismic Behavior ◽  
High Strength ◽  
Squat Walls

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

Finite Element Analysis of Concrete-Filled Rectangular Tubular Frame

2014 ◽  
Vol 578-579 ◽  
pp. 695-698
Author(s):  
Xi Le Li ◽  
Li Hua Niu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Axial Load ◽  
Seismic Behavior ◽  
Element Model ◽  
Load Level ◽  
Hysteresis Curve ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Nonlinear Finite Element Model

Based on the model experiment on seismic behavior of a 1-span, 2-story concrete-filled rectangular steel tubal (CFRST) frame under lateral cyclic loads, a 3-D nonlinear finite element model of concrete-filled rectangular steel tubular frame is proposed in the paper. Compared with the experimental hysteresis curve, the computational results are found to be accurate, which shows that this model proposed in the paper can be applied in structure analysis of concrete-filled rectangular tubular frames. So the model was used in the finite element analysis of concrete-filled rectangular frame with different axial load level. Compared the computational displacement envelop curves, it concludes that the ductility and bearing capacity of CFRST frames reduces with the increasing axial load level.

Experimental Study on Seismic Behavior of High-Rise RC Shear Wall with Diagonal Web Reinforcement

2012 ◽  
Vol 446-449 ◽  
pp. 2305-2308
Author(s):  
Guang Qiang Zhou ◽  
Qing Yang Liu ◽  
De Yuan Zhou
Keyword(s):  
Reinforced Concrete ◽  
Axial Compression ◽  
Seismic Behavior ◽  
Shear Wall ◽  
Concrete Wall ◽  
High Rise ◽  
Web Reinforcement ◽  
Reinforced Concrete Wall ◽  
Rc Shear Wall ◽  
Reversed Cyclic

Based on the experiment of four models of reduced scale high-rise reinforced concrete wall under low-reversed cyclic loading, seismic behavior of reinforced concrete (RC) shear wall with diagonal web reinforcement under different ratio of axial compression is studied, in comparison to ordinary shear wall. The experiment result shows that diagonal bars affect the distribution of cracks and help to resist shear slip at the bottom of the wall. Seismic behavior of high-rise shear wall, which horizontal bars are replaced with the same amount diagonal bars in part can be obviously improved when the ratio of axial compression is high, but when the ratio of axial compression is low, the effect is not obvious.

scholarly journals Experimental Study on Shear Capacity of High Strength Reinforcement Concrete Deep Beams with Small Shear Span–Depth Ratio

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1218 ◽  
Author(s):  
Jun-Hong Zhang ◽  
Shu-Shan Li ◽  
Wei Xie ◽  
Yang-Dong Guo
Keyword(s):  
High Strength ◽  
Shear Capacity ◽  
Reinforcement Ratio ◽  
Longitudinal Reinforcement ◽  
Deep Beams ◽  
Shear Span ◽  
Depth Ratio ◽  
Diagonal Compression ◽  
Web Reinforcement ◽  
Small Shear

This study aimed to investigate the shear capacity performance for eight deep beams with HTRB600 reinforced high strength concrete under concentrated load to enable a better understanding of the effects of shear span–depth ratio, longitudinal reinforcement ratio, vertical stirrup ratio and in order to improve design procedures. The dimension of eight test specimens is 1600 mm × 200 mm × 600 mm. The effective span to height ratio l0/h is 2.0, the shear span–depth ratio λ is 0.3, 0.6 and 0.9, respectively. In addition, the longitudinal reinforcement ratio ρs is set to 0.67%, 1.05%, 1.27%, and the vertical stirrup ratio is taken to be 0%, 0.25%, 0.33%, 0.5%. Through measuring the strain of steel bar, the strain of concrete and the deflection of mid-span, the characteristics of the full process of shear capacity, the failure mode and the load deflection deformation curve were examined. The test results showed that the failure mode of deep beams with small shear span–depth ratio is diagonal compression failure, which is influenced by the layout and quantity of web reinforcement. The diagonal compression failure could be classified into two forms: crushing-strut and diagonal splitting. With decreasing of shear span–depth ratio and increasing longitudinal reinforcement ratio, the shear capacity of deep beams increases obviously, while the influence of vertical web reinforcement ratio on shear capacity is negligible. Finally, the shear capacity of eight deep beams based on GB 50010-2010 is calculated and compared with the calculation results of ACI 318-14, EN 1992-1-1:2004 and CSA A23.3-04, which are based on strut-and-tie model. The obtained results in this paper show a very good agreement with GB50010-2010 and ACI 318-14, while the results of EN 1992-1-1:2004 and CSA A23.3-04 are approved to be conservative.

Seismic behavior of exteriorbeam–column joints with high-performance steel rebar: Experimental and numerical investigations

2020 ◽  
Vol 24 (1) ◽  
pp. 90-106
Author(s):  
Fei Gao ◽  
Zhiqiang Tang ◽  
Shilong Mei ◽  
Biao Hu ◽  
Shitao Huang ◽  
...  
Keyword(s):  
Finite Element ◽  
Axial Load ◽  
High Performance ◽  
Compressive Loading ◽  
Load Ratio ◽  
Reinforcement Ratio ◽  
Finite Element Models ◽  
Flexural Failure ◽  
Axial Load Ratio ◽  
Parametric Studies

Three full-scale exterior beam–column joints with anti-seismic steel reinforcement were tested under quasi-static cyclic loading and column axial compressive loading. The test variables were column axial load ratio and joint core hoop reinforcement ratio. Experimental results, including failure mode, hysteretic curve, ductility, energy dissipation, stiffness degradation, and decoupling of deformations, were presented and analyzed. The tests revealed that the anti-seismic rebar resulted in good joint seismic performance and that column axial load ratio and joint core hoop reinforcement ratio impose limited influence of joint performance when the joint failed in beam flexural failure. The calibrated finite element models developed based on OpenSees were then used to simulate the behavior of joint specimens. Parametric studies via finite element modeling were performed to study the influence of various parameters on the performance of beam–column joints.

Seismic Behavior of Concrete Columns Confined by CFRP and GFRP Jackets

2013 ◽  
Vol 405-408 ◽  
pp. 657-663
Author(s):  
Yu Mei Teng ◽  
Ye Tian ◽  
James Liu
Keyword(s):  
Tensile Strength ◽  
Seismic Performance ◽  
Axial Load ◽  
Seismic Behavior ◽  
Large Scale ◽  
Concrete Columns ◽  
Cyclic Displacement ◽  
Transverse Steel ◽  
The Moment ◽  
Constant Axial Load

This paper presents experimental results of a series of large-scale reinforced concrete circular and square columns tested under lateral cyclic displacement excursions while simultaneously subjected to constant axial load. All the specimens contained only minimal transverse steel and were then retrofitted with CFRP or GFRP jackets except control specimens. The measured hysteretic loops of the moment vs. curvature and shear vs. deflection relationships are reported for each specimen. It was observed that both CFRP and GFRP wrapping could provide effective confinement and significantly improve the seismic performance of columns. The effectiveness of FRP in enhancing column ductility relates more closely to its tensile strength than stiffness, thus the application of GFRP confinement to concrete columns is promoted due to obtainability and economical concern.

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