Fatigue properties of RC beams reinforced with ECC layer and steel plate

Ma, Xingpeng; Liu, Long

doi:10.1016/j.conbuildmat.2023.130799

Cited by 9 publications

(4 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the basis, the parameter study was performed to compare the influence of steel plate width, ECC layer thickness, original beam damage degree and longitudinal tensile rebar cross-sectional area on the flexural performance of ESRB. The basic information about the test beam was consistent with that in the literature (Ma and Liu, 2023). The total length of the test beam was 2,100 mm, the calculated span was 1,800 mm and the section height and width were 200 mm and 150 mm, respectively.…”

Section: Methodssupporting

confidence: 82%

Flexural behavior of RC beams reinforced by ECC layer and steel plate: numerical simulation

Liu,

Wang,

Xiao

2024

IJSI

Self Cite

View full text Add to dashboard Cite

PurposeThe combination of an Engineered Cementitious Composite (ECC) layer and steel plate to reinforce RC beams (ESRB) is a new strengthening method. The ESRB was proposed based on the steel plate at the bottom of RC beams, aiming to solve the problem of over-reinforced RC beams and improve the bearing capacity of RC beams without affecting their ductility.Design/methodology/approachIn this paper, the finite element model of ESRB was established by ABAQUS. The results were compared with the experimental results of ESRB in previous studies and the reliability of the finite element model was verified. On this basis, parameters such as the width of the steel plate, thickness of the ECC layer, damage degree of the original beam and cross-sectional area of longitudinal tensile rebar were analyzed by the verified finite element model. Based on the load–deflection curve of ESRB, ESRB was discussed in terms of ultimate bearing capacity and ductility.FindingsThe results demonstrate that when the width of the steel plate increases, the ultimate load of ESRB increases to 133.22 kN by 11.58% as well as the ductility index increases to 2.39. With the increase of the damage degree of the original beam, the ultimate load of ESRB decreases by 23.7%–91.09 kN and the ductility index decreases to 1.90. With the enhancement of the cross-sectional area of longitudinal tensile rebar, the ultimate bearing capacity of ESRB increases to 126.75 kN by 6.2% and the ductility index elevates to 2.30. Finally, a calculation model for predicting the flexural capacity of ESRB is proposed. The calculated results of the model are in line with the experimental results.Originality/valueBased on the comparative analysis of the test results and numerical simulation results of 11 test beams, this investigation verified the accuracy and reliability of the finite element simulation from the aspects of load–deflection curve, characteristic load and failure mode. Furthermore, based on load–deflection curve, the effects of steel plate width, ECC layer thickness, damage degree of the original beam and cross-sectional area of longitudinal tensile rebar on the ultimate bearing capacity and ductility of ESRB were discussed. Finally, a simplified method was put forward to further verify the effectiveness of ESRB through analytical calculation.

show abstract

Section: Methodssupporting

confidence: 82%

Flexural behavior of RC beams reinforced by ECC layer and steel plate: numerical simulation

Liu,

Wang,

Xiao

2024

IJSI

Self Cite

View full text Add to dashboard Cite

show abstract

“…Common methods for repairing and strengthening concrete beams include increasing section reinforcement (Ye et al, 2010;Li, et al, 2014;Naser, et al, 2019), bonding fiber-reinforced composite material (Dai, et al, 2011;Hawileh, et al, 2018;Zhang, et al, 2023), and bonding steel plate reinforcement (Barnes and Mays, 2006;Arslan, et al, 2008;Qu, et al, 2017;Ma and Liu, 2023). Among them, the method of bonding steel plate reinforcement has been widely used in concrete reinforcement due to its simple and fast construction, and it does not significantly increase the cross-sectional dimensions and weight of the reinforced components.…”

Section: Introductionmentioning

confidence: 99%

Study on the monitoring method of debonding between concrete beams and reinforced steel plates based on piezoelectric smart materials

Wang,

Kong,

Sun

et al. 2024

Front. Mater.

View full text Add to dashboard Cite

Concrete reinforcement is essential for ensuring the safety and durability of concrete structures. Bonding steel plates to reinforce concrete is widely used to renovate or strengthen concrete beam structures. Due to construction quality and the influence of factors such as environment and fatigue, debonding often occurs between the steel plate and concrete, making monitoring and early warning after concrete structure reinforcement challenging. This paper proposes a novel approach to monitor the degree of debonding between the steel plate and concrete beam using active sensing technology. The method uses lead zirconate titanate (PZT) as an actuator to generate stress waves. It prepares strip sensors with polyvinylidene fluoride as the sensing element to monitor stress waves passing through the steel plate and concrete beam. The monitoring system detects the degree of debonding between the steel plate and the concrete beam by monitoring the change in surface voltage of the sensor. Experiments show that the degree of debonding significantly correlates with the received voltage signal; the higher the debonding, the larger the received voltage signal. It is also observed that, at the same degree of debonding, the actuator and sensor attachment position have a particular impact on the received voltage signal. Through experiments and numerical simulation analysis, it is found that when the sensor is attached to the left side of the steel plate, that is, the bonded section of the steel plate, the amplitude of the voltage signal collected by the dynamic information acquisition system is the smallest, i.e., V_debonded section > V_middle > V_bonded section. Based on the above research, the active sensing technology proposed in this paper has good sensitivity to the degree of debonding between the steel plate and concrete. It is expected to become an effective monitoring and evaluation method for the degree of debonding between steel plates and concrete.

show abstract

“…The road and bridge structures are subjected to various loads, and when the stress reaches the limit, deformation occurs, leading to fatigue failure [7][8][9][10]. UHTCC exhibits a similar fatigue failure phenomenon as ordinary concrete, albeit with differing fatigue life and characteristics [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…This disparity has spurred scholarly investigation into the fatigue performance of UHTCC [15][16][17], particularly focusing on bending fatigue characteristics, which has yielded fruitful results [18][19][20][21][22]. Ma [7] reinforced RC beams with steel plates and UHTCC, finding that the bending resistance of RC beams containing a UHTCC layer and steel plate was more than double that of the control group. After 200,000 and 2 million fatigue loads, the residual bearing capacity was 96.2% and 94.2% of the static load test, respectively.…”

Section: Introductionmentioning

confidence: 99%

Bending Fatigue Properties of Ultra-High Toughness Cementitious Composite (UHTCC)

Wang,

Huang,

Shen

et al. 2024

Materials

View full text Add to dashboard Cite

Ultra-High Toughness Cementitious Composite (UHTCC) represents a composite material meticulously engineered on the foundation of micromechanical principles. The multi-crack cracking and strain-hardening characteristics of UHTCC enable it to be applied to orthotropic steel decks to control the crack width. Different from most studies which only focus on hybrid fiber or fatigue characteristics, this paper studies the influence of hybrid fiber content on static mechanical properties, flexural toughness, and flexural fatigue characteristics of UHTCC under different stress levels. The compressive and flexural strength, bending toughness, and fatigue damage of UHTCC under different fiber ratios were compared, and the fatigue properties of hybrid fiber UHTCC were verified. The results reveal that hybrid fiber exerts a more pronounced effect on toughness, augmenting the maximum folding ratio by 23.7%. Single-doped steel fiber UHTCC exhibits a characteristic strain-softening phenomenon attributable to inadequate fiber content, whereas the bending toughness index of hybrid fiber UHTCC surpasses that of SF1.5P0 by 18.6%. Under low-stress conditions, UHTCC demonstrates a nearly threefold increase in bending fatigue life with a mere 1% steel fiber content, while the influence of polyvinyl alcohol (PVA) fiber on fatigue life is more significant: with an increase of only 1/5 volume content, the fatigue life increased by 29.8%, reaching a maximum increase of 43.2% at 1/4 volume content. Furthermore, the fatigue damage accumulation curve of UHTCC follows a three-stage inverted S-shaped trajectory. The inclusion of PVA fiber facilitates early initiation of stable cracking during the fatigue failure process, thereby advancing the entire strain stability development stage and mitigating external load forces through the proliferation of micro-cracks. Consequently, compared to SF1P0, the ε0 of SF1P5 experiences a significant increase, reaching 143.43%.

show abstract

Fatigue properties of RC beams reinforced with ECC layer and steel plate

Cited by 9 publications

References 37 publications

Flexural behavior of RC beams reinforced by ECC layer and steel plate: numerical simulation

Flexural behavior of RC beams reinforced by ECC layer and steel plate: numerical simulation

Study on the monitoring method of debonding between concrete beams and reinforced steel plates based on piezoelectric smart materials

Bending Fatigue Properties of Ultra-High Toughness Cementitious Composite (UHTCC)

Contact Info

Product

Resources

About