Stress-Strain Model for FRP-Confined Concrete in Eccentrically Loaded Circular Columns

Lin, G.1; Teng, J. G.1,2

2019-06

10.1061/(ASCE)CC.1943-5614.0000946

JOURNAL OF COMPOSITES FOR CONSTRUCTION   影响因子和分区

1090-0268

1943-5614

Extensive research has been conducted on FRP (fiber-reinforced polymers)-confined concrete columns under concentric compression, leading to many stress-strain models for such concrete. These concentric-loading (CL) stress-strain models have generally been used in the analysis of both concentrically and eccentrically loaded columns. Existing tests, however, have shown that eccentrically loaded FRP-confined concrete columns exhibit some behavioral aspects that cannot be closely predicted using a CL stress-strain model. This paper presents an in-depth investigation into this problem using an advanced three-dimensional (3D) finite element (FE) approach. The stress-strain response of concrete is shown to vary significantly over the section, and the direct use of a single CL stress-strain model for the entire section in the analysis of eccentrically loaded columns may lead to significant errors in the prediction of ultimate displacement/curvature. A stress-strain model for the confined concrete at the extreme compression fiber of the section is also shown to provide a relatively simple and much more accurate option for predicting the ultimate displacement/curvature of eccentrically loaded columns. Based on this conclusion, a so-called eccentricity-dependent (EccD) stress-strain model is proposed based on a comprehensive parametric study using the FE approach. The proposed model can be directly used in a section analysis or a theoretical column model and is proven to provide much more accurate predictions of the ultimate displacement/curvature of test columns than existing CL stress-strain models. (c) 2019 American Society of Civil Engineers.

Fiber-reinforced polymers (FRP) Confinement Concrete Eccentric loading Column Stress-strain model Finite element analysis

SCI ; EI

英语

通讯

PolyU[5252/13E] ; PolyU[PolyU 152153/14E]

Engineering ; Mechanics ; Materials Science

Engineering, Civil ; Mechanics ; Materials Science, Composites

WOS:000464646400009

ASCE-AMER SOC CIVIL ENGINEERS

20191406724905

Bridge decks ; Columns (structural) ; Concrete construction ; Concretes ; Fiber reinforced plastics ; Finite element method ; Forecasting ; Plasma confinement ; Polymers ; Reinforcement ; Stress-strain curves

Bridges:401.1 ; Structural Members and Shapes:408.2 ; Concrete:412 ; Polymeric Materials:815.1 ; Numerical Methods:921.6 ; Plasma Physics:932.3 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China
2.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen 518055, Peoples R China

Lin, G.,Teng, J. G.. Stress-Strain Model for FRP-Confined Concrete in Eccentrically Loaded Circular Columns[J]. JOURNAL OF COMPOSITES FOR CONSTRUCTION,2019,23(3).

Lin, G.,&Teng, J. G..(2019).Stress-Strain Model for FRP-Confined Concrete in Eccentrically Loaded Circular Columns.JOURNAL OF COMPOSITES FOR CONSTRUCTION,23(3).

Lin, G.,et al."Stress-Strain Model for FRP-Confined Concrete in Eccentrically Loaded Circular Columns".JOURNAL OF COMPOSITES FOR CONSTRUCTION 23.3(2019).