Confined concrete model under cyclic load

1997 ◽  
Vol 30 (3) ◽  
pp. 139-147 ◽  
Author(s):  
J. Enrique Martínez-Rueda ◽  
A. S. Elnashai
Keyword(s):  
Cyclic Load ◽  
Confined Concrete ◽  
Concrete Model

scholarly journals Parametric Study on the Effect of Steel Confinement in Short Bridge Piers Retrofitted with Externally-Wrapped FRP

2019 ◽  
Vol 271 ◽  
pp. 01012
Author(s):  
Diogo Zignago ◽  
Michele Barbato
Keyword(s):  
Compressive Strength ◽  
Parametric Study ◽  
Fiber Reinforced Polymer ◽  
Confined Concrete ◽  
Bridge Piers ◽  
Element Analysis ◽  
Reinforced Polymer ◽  
Externally Bonded ◽  
Frp Wrapping ◽  
Concrete Model

Confinement of reinforced concrete (RC) piers generally has a beneficial effect on both the compressive strength and the ductility of the confined member. Thus, externally-bonded fiber-reinforced polymer (FRP) wrapping is often used as a retrofit technique for bridge piers when additional compressive strength is needed. This study employs finite element analysis and a recently developed FRP-and-steel confined concrete model to investigate the influence of internal steel confinement on the response of circular RC columns confined with FRP and subject to concentric axial load. This new model leads to more accurate estimates of the response of these columns, what is particularly relevant for piers in short span bridges that are subjected mainly to vertical loads, for which it could lead to a more efficient and economical piers’ retrofit, as well as a more accurate and less conservative bridge rating. A parametric study is conducted to examine the importance of some key parameters in the design of such columns.

Cyclic load tests on prestressed concrete model frames

1996 ◽  
Vol 18 (4) ◽  
pp. 311-320 ◽  
Author(s):  
Y.L. Mo ◽  
R.H. Han
Keyword(s):  
Prestressed Concrete ◽  
Cyclic Load ◽  
Load Tests ◽  
Concrete Model

FRP-Confined Concrete Model

2001 ◽  
Vol 5 (1) ◽  
pp. 62-65 ◽  
Author(s):  
Amir Mirmiran ◽  
Aashish Singhvi ◽  
Giorgio Monti
Keyword(s):  
Confined Concrete ◽  
Concrete Model

Confined concrete model of circular, elliptical and octagonal CFST short columns

2016 ◽  
Vol 22 (3) ◽  
pp. 497-520 ◽  
Author(s):  
Vipulkumar I. Patel ◽  
Brian Uy ◽  
K.A. Prajwal ◽  
Farhad Aslani
Keyword(s):  
Confined Concrete ◽  
Short Columns ◽  
Concrete Model

scholarly journals Cyclic Load Responses of GFRP-Strengthened Hollow Rectangular Bridge Piers

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Junfeng Jia ◽  
Qiang Han ◽  
Zigang Xu ◽  
Dongjie Zhang
Keyword(s):  
Failure Modes ◽  
Load Capacity ◽  
Axial Loading ◽  
Confined Concrete ◽  
Bridge Piers ◽  
Dissipated Energy ◽  
Glass Fiber Reinforced ◽  
Area Distribution ◽  
Flexural Ductility ◽  
Concrete Model

This study investigated the seismic behavior of glass fiber reinforced polymer (GFRP) strengthened hollow rectangular bridge piers. Cyclic testing of reinforced concrete (RC) piers retrofitted with GFRP was carried out under constant axial loading and lateral bending. The failure characteristics, flexural ductility, dissipated energy, and hysteretic behaviors, were analyzed based on experimental results. A simplified GFRP-confined concrete model is developed by considering effective strength coefficient and area distribution ratio of GFRP sheets. The results indicate that the failure modes and damage region would be changed and the ductility and dissipated energy of the GFRP-strengthened hollow rectangular bridge piers were improved greatly but not much improvement for the lateral load capacity. The analytical results of the force-displacement hysteretic loops based on the GFRP-confined concrete model developed in this paper agreed well with the experimental data.

A new confined concrete model considering the strain gradient effect for RC columns under eccentric loading

2018 ◽  
Vol 70 (23) ◽  
pp. 1189-1204 ◽  
Author(s):  
De-Cheng Feng ◽  
Zhao-Dong Ding
Keyword(s):  
Strain Gradient ◽  
Confined Concrete ◽  
Rc Columns ◽  
Gradient Effect ◽  
Concrete Model

FRP-confined concrete model based on damage-plasticity and phase-field approaches

2020 ◽  
Vol 244 ◽  
pp. 112263 ◽  
Author(s):  
Hossein Saberi ◽  
Tinh Quoc Bui ◽  
Akira Furukawa ◽  
Alireza Rahai ◽  
Sohichi Hirose
Keyword(s):  
Phase Field ◽  
Confined Concrete ◽  
Model Based ◽  
Field Approaches ◽  
Concrete Model

The Constitutive Relationship of Concrete Core in Circular Concrete-Filled Steel Tubular Columns

2010 ◽  
Vol 163-167 ◽  
pp. 2063-2067
Author(s):  
Lin Lin Liu ◽  
Yong Qing Tu ◽  
Ying Hua Ye
Keyword(s):  
Numerical Simulation ◽  
Axial Load ◽  
Lateral Pressure ◽  
Confined Concrete ◽  
Constitutive Relationship ◽  
Concrete Core ◽  
Tubular Columns ◽  
Cfst Columns ◽  
Relationship Of ◽  
Concrete Model

Considering the confining mechanism in circular concrete-filled steel tubular (CFST) columns, a volume-based method for dividing the effectively and ineffectively confined area of concrete core and calculating the value of effectively confined coefficient is presented. The constitutive relationship of concrete core is developed by means of modifying the expressions of effective lateral pressure and the descending stage in Mander’s confined concrete model. Numerical simulation of several circular CFST columns under axial load is carried out in ABAQUS. The comparisons between calculated results and experimental results demonstrate that the suggested concrete constitutive relationship is appropriate for the nonlinear analysis of circular CFST columns.

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