Analysis-oriented stress–strain model for FRP-confined concrete with preload

Yi, Peng; Guo, Rui; Li, Hongyi; Tang, Hongyuan; Huang, Jingxiang

doi:10.1016/j.compstruct.2017.01.007

Cited by 44 publications

(16 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was convened that sustained loading caused a loss in axial capacity when low-strength concrete was adopted, and the pre-load effect was less significant for concrete samples poured with an ordinary strength mix. An experimental and theoretical study on the FRP-confinement of concrete with pre-loading is reported in [65]. Test results and numerical simulations were implemented for the analysis-oriented-model assessment.…”

Section: Available Studies On Pre-load Effectmentioning

confidence: 99%

“…the number of FRP layers increases, and the transverse dimensions of the cro decrease. Although the pre-load effect has been studied recently [59][60][61][62][63][64][65][66], the co were not always consistent each other. The conclusions are not always compar the ratio between the concrete grade and tensile properties of FRP may be very as starting data.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pre-Load Effect on CFRP-Confinement of Concrete Columns: Experimental and Theoretical Study

2021

View full text Add to dashboard Cite

The axial compression strength of concrete columns has been proved to be significantly enhanced by external confinement. In this perspective, the use of Fiber-Reinforced Polymers (FRPs) has been extensively studied. In practical applications, the FRP-confinement is installed on loaded columns, which can already be significantly deformed, while theoretical models neglect this aspect. This paper concerns a new experimental investigation on the possibility that a pre-existing axial load affects the FRP-confinement of concrete. The research program also aimed at the development of a new analysis-oriented-model for the prediction of the compressive strength of FRP-jacketed concrete columns, depending on the level of the axial load, acting before the confinement. For this purpose, series of small-scale concrete cylinders were first loaded, then confined with Carbon FRP, and finally subjected to destructive pure axial compression tests. Four different levels of pre-existing loads were simulated, including the un-loaded condition.

show abstract

Section: Available Studies On Pre-load Effectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pre-Load Effect on CFRP-Confinement of Concrete Columns: Experimental and Theoretical Study

2021

View full text Add to dashboard Cite

show abstract

“…It is noted in the literature (22) that the stress concentration at the corner section of the column leads to the weakening of the tensile strength of the textile layer, which is related to the corner radius and height of the rectangular section, that is [4] [4] It is noted that the confinement of the textile layer around the concrete is similar to the hoop action of stirrups. Referring to the results of a concrete cylinder under three-directional pressure, a rectangular column is still subjected to the compressive stress around it.…”

Section: Proposal Of Constraint Modelmentioning

confidence: 99%

Compression performance and bearing capacity calculation model of small-eccentricity columns strengthened with textile-reinforced mortar (TRM)

Yin

Hua

2019

Mater. construcc.

View full text Add to dashboard Cite

To study the compression performance of TRM-strengthened columns with small eccentricities, a total of 9 reinforced concrete (RC) columns with end corbels were subjected to compression testing. The test parameters are as follows: the number of textile layers, the ratio of longitudinal reinforcement, and polyvinyl alcohol (PVA) short-cut fiber volume fraction. The experimental results indicated that, compared to the control, columns with three layers of textile exhibited an approximately 10.66% increase in the bearing capacity. However, the effect increased only slightly when the number of textile layers increased to 4. Besides, the effect was improved with the increase in the ratio of longitudinal reinforcement and PVA fiber volume fraction. Finally, based on laboratory tests and related research results, a model for calculating normal section bearing capacity of TRM-strengthened columns with small eccentricities was presented. A comparison of the theoretical and experimental data demonstrated the applicability of the proposed model.

show abstract

“…Available but limited investigations of FRP confined predamaged concrete under monotonic loading have been carried out 12,14,15,18,21–25 . For example, Yaqub et al 24 experimentally investigated the effect of FRP confinement on the strength and ductility of postheated reinforced concrete columns.…”

Section: Introductionmentioning

confidence: 99%

Effects of predamage and load cyclic on compression behavior of fiber reinforced polymer‐confined concrete

Cao

Hou

Liu

et al. 2021

Structural Concrete

View full text Add to dashboard Cite

Most existing studies on fiber reinforced polymer (FRP) confined concrete have focused on undamaged concrete that is subjected to uniaxial monotonic compression. However, FRP jackets are usually applied to concrete columns with existing material damage and potential future damage. This paper investigates FRP confinement on concrete with damage before and after FRP jacketing. A total of 32 FRP‐confined concrete specimens were tested under axial compression in this work. The prior damage before FRP jacketing was implemented as predamaging by applying preloading and then release on the plain concrete specimens. The post damage after FRP jacketing was performed by applying cyclic axial compression loading on FRP‐confined concrete specimens. The test results reveal that the concrete predamage levels have significant influences on the cyclic stress–strain curve and envelop stress–strain curve for FRP confined concrete under cyclic loading. Existing models on ultimate state, plastic strain, reloading and unloading moduli were evaluated and investigated in this work.

show abstract

Analysis-oriented stress–strain model for FRP-confined concrete with preload

Cited by 44 publications

References 18 publications

Pre-Load Effect on CFRP-Confinement of Concrete Columns: Experimental and Theoretical Study

Pre-Load Effect on CFRP-Confinement of Concrete Columns: Experimental and Theoretical Study

Compression performance and bearing capacity calculation model of small-eccentricity columns strengthened with textile-reinforced mortar (TRM)

Effects of predamage and load cyclic on compression behavior of fiber reinforced polymer‐confined concrete

Contact Info

Product

Resources

About