Journal article
Monotonic and Cyclic Axial Compressive Behavior of CFRP-Confined Rectangular RC Columns
Journal of Composites for Construction, Vol.22(4), pp.1-16
01/08/2018
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Source: InCites
Abstract
The majority of experimental and analytical investigations on the stress-strain behavior of rectangular concrete columns externally confined with carbon fiber–reinforced polymer (CFRP) composites have concentrated largely on unreinforced concrete columns of small size. However, research investigating the influence of larger cross-sectional size and internal steel reinforcement on the stress-strain behavior of CFRP-confined rectangular RC columns under axial compression loading has been limited. Therefore, the first part of this paper aims to present the results of experimental tests on 28 larger-sized rectangular plain and reinforced concrete (RC) columns confined with CFRP wraps. The primary test parameters were (1) cross-sectional size and aspect ratio; (2) number of CFRP composite layers; (3) volumetric ratio of hoop steel reinforcement; and (4) nature of loading (i.e., monotonic and cyclic). The experiments showed that the stress-strain curves of the monotonically loaded CFRP-confined columns exhibited a softening second branch followed by an ascending or almost flat third branch. All the confined columns experienced a significant enhancement in axial strain but only a slight enhancement in axial strength. An important finding of the study was that the internal longitudinal and hoop steel reinforcement influenced the shapes of the axial stress-strain envelope curves, the unloading and reloading paths, and the plastic strain values. A model was finally proposed for predicting the ultimate strength of CFRP-confined rectangular RC columns. The performance of the proposed model was validated against the results of current and existing experiments.
Details
- Title
- Monotonic and Cyclic Axial Compressive Behavior of CFRP-Confined Rectangular RC Columns
- Creators
- Haytham F Isleem - Harbin Institute of TechnologyZhenyu Wang - Harbin Institute of TechnologyDaiyu Wang - Harbin Institute of TechnologyScott T Smith - Southern Cross University
- Publication Details
- Journal of Composites for Construction, Vol.22(4), pp.1-16
- Publisher
- American Society of Civil Engineers
- Grant note
- This study is financially supported by the National Natural Science Foundation of China (Grant Nos. 51408153, 51478143, and 51278150); the China Postdoctoral Science Foundation (Grant Nos. 2014M551252 and 2015T80354); and the Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, Shenzhen University (GDDCE16-09).
- Identifiers
- 991012927079002368
- Copyright
- © ASCE
- Academic Unit
- Science; National Centre for Flood Research; Faculty of Science and Engineering; School of Environment, Science and Engineering
- Language
- English
- Resource Type
- Journal article