Experimental study on the fatigue behaviour of RC beams strengthened with TRC after sustained load corrosion

Sheng, Jie; Yin, Shiping; Fei, Wang; Yang, Yang

doi:10.1016/j.conbuildmat.2016.11.030

Cited by 27 publications

(15 citation statements)

References 12 publications

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“…Four-point bending experimental tests conducted on 2400 mm long RC beam samples showed that the fatigue life of RC beams is characterized by two main stages [35]. In the initial stage, several new concrete cracks formed in the maximum moment region, which determined a significant reduction of the member flexural stiffness.…”

Section: Fatigue Strengthening Of Rc Beam With Frcm Composites: Statementioning

confidence: 99%

“…Therefore, they can lessen the stress range in the steel rebar, which in turn limits the crack growth rate, determining a significant extension of the beam fatigue life. Additionally, FRCM composites counteract the opening of flexural cracks in the concrete, delaying in turn fatigue crack propagation in the steel reinforcement, reducing the rebar exposure to the aggressive environment agents, and thus improving the durability of the steel reinforcement [35].…”

Section: Fatigue Strengthening Of Rc Beam With Frcm Composites: Statementioning

confidence: 99%

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Fatigue Behavior of PBO FRCM Composite Applied to Concrete Substrate

et al. 2020

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Several reinforced-concrete (RC) structural elements are subjected to cyclic load, such those employed in highway and railroad bridges and viaducts. The durability of these elements may be reduced as a consequence of fatigue, which mainly affects the steel reinforcement. The use of externally bonded (EB) fiber-reinforced cementitious matrix (FRCM) composites allows the moment capacity to be shared by the internal reinforcement and the EB composite, thus increasing the fatigue life of the strengthened RC member. The effectiveness of EB FRCM composites is related to the composite bond properties. However, limited research is currently available on the effect of fatigue on the bond behavior of FRCM-substrate joints. This study provides first the state of the art on the fatigue behavior of different FRCM composites bonded to a concrete substrate. Then, the fatigue bond behavior of a polyparaphenylene benzo-bisoxazole (PBO) FRCM is experimentally investigated using a modified beam test set-up. The use of this set-up provided information on the effect of fiber-matrix interface shear and normal stresses on the specimen fatigue bond behavior. The results showed that fatigue loading may induce premature debonding at the matrix-fiber interface and that stresses normal to the interface reduce the specimen fatigue life.

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Section: Fatigue Strengthening Of Rc Beam With Frcm Composites: Statementioning

confidence: 99%

Section: Fatigue Strengthening Of Rc Beam With Frcm Composites: Statementioning

confidence: 99%

Fatigue Behavior of PBO FRCM Composite Applied to Concrete Substrate

et al. 2020

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“…Use the f l value to account for the f c value by using equation [5]. 4. σ s in equation [6] can be replaced by x (equation [8]). 5.…”

Section: Comparison Between Calculated and Experimental Valuesmentioning

confidence: 99%

“…These systems are merely variations of the same core idea with typically minor differences. Textilereinforced morter (TRM) is made of a multiaxial textile and fine-grained concrete, and it can not only repair the defects and cracks on the surface of the structure but also provide a cover that resists corrosion of the damaged structure (8). Due to the excellent anti-crack performance, anti-corrosion capacity and seepage resistance, TRM is widely used for strengthening reinforced concrete structures.…”

Section: Introductionmentioning

confidence: 99%

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

Yin

Hua

2019

Mater. construcc.

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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.

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“…A possible explanation was that the columns with persistent load had an unrecoverable initial deformation before the cyclic test. is led to their smaller displacement amplitude because of the existence of the initial deformation during the cyclic test [21], which contributed to the increase of the yield load and ultimate load. However, at the same time, the environment factors, that is, freeze-thaw cycles and chloride corrosion, …”

Section: Failure Modementioning

confidence: 99%

Hysteretic Behavior of Eccentrically Loaded Reinforced Air‐Entrained Concrete Columns under Combined Effects of Freeze‐Thaw Cycles and Seawater Corrosion

Zhang

Diao

et al. 2018

Advances in Civil Engineering

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Besides service loads, reinforced concrete structures in cold coastal seismic regions are subjected to multiple attacks of freeze-thaw cycles and seawater corrosion as well as the earthquake struck. An experimental study was conducted to investigate the seismic response of eccentrically loaded reinforced air-entrained concrete columns under alternative actions of freeze-thaw cycles and chloride corrosion. Results show that, after 300 times of freeze-thaw cycles alternated with 100 times of seawater immersion, the hysteretic behavior of the eccentrically loaded columns manifested an apparent asymmetric pattern. Under forward cyclic load, the existence of larger eccentric load rendered the reduction of the ultimate load and the ductility of a column by up to 20.3% and 46.05%, respectively, but it had a positive effect if reverse cyclic load was applied. e presence of eccentric load could have a considerable impact on the seismic behavior of reinforced air-entrained concrete columns served in an aggressive environment.

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Experimental study on the fatigue behaviour of RC beams strengthened with TRC after sustained load corrosion

Cited by 27 publications

References 12 publications

Fatigue Behavior of PBO FRCM Composite Applied to Concrete Substrate

Fatigue Behavior of PBO FRCM Composite Applied to Concrete Substrate

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

Hysteretic Behavior of Eccentrically Loaded Reinforced Air‐Entrained Concrete Columns under Combined Effects of Freeze‐Thaw Cycles and Seawater Corrosion

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