UHPC jacket retrofitting of reinforced concrete bridge piers with low flexural reinforcement ratios: experimental investigation and three-dimensional finite element modeling

Tong, Teng; Wang, Jingquan; Lei, Haipeng; Liu, Zhao

doi:10.1080/15732479.2020.1817107

Cited by 15 publications

(8 citation statements)

References 26 publications

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“…A higher mesh size could overestimate the damage region while using CDP. Additionally, the CDP concrete model does not shows any convincing results in reverse cyclic condition 19 . Some of the potential sources of errors are inaccurate material data input for the CDP model, inaccurate constraints between the different concrete components and highly distorted mesh elements.…”

Section: Methodsmentioning

confidence: 85%

“…For the analysis of a reinforced concrete frame, Alfarah et al 33 employed a value of 13. Tong et al 19 Employed 20 to represent the cyclic behavior of a concrete column. The non-linear behavior of a three-dimensional beam was studied by 34 using dilation angles ranging from 20 to 50.…”

Section: Resultsmentioning

confidence: 99%

“…Using Abaqus CDP, Dawood et al 18 investigated the behaviour of segmentally post-tensioned concrete bridge piers. The performance of Abaqus CDP under reverse cyclic analysis of bridge piers was investigated by 19 . CDP with viscous regularizing was compared to the SDP (softened damaged model given by 20 and it was determined that SDP performs better than CDP in reverse cyclic analysis while employing an implicit solver in reverse cyclic loading at high strain rates.…”

Section: Introductionmentioning

confidence: 99%

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Non-linear finite element modeling of damages in bridge piers subjected to lateral monotonic loading

Ahmad,

Ahmed,

Iqbal

et al. 2023

Sci Rep

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Bridges are among the most vulnerable structures to earthquake damage. Most bridges are seismically inadequate due to outdated bridge design codes and poor construction methods in developing countries. Although expensive, experimental studies are useful in evaluating bridge piers. As an alternative, numerical tools are used to evaluate bridge piers, and many numerical techniques can be applied in this context. This study employs Abaqus/Explicit, a finite element program, to model bridge piers nonlinearly and validate the proposed computational method using experimental data. In the finite element program, a single bridge pier having a circular geometry that is being subjected to a monotonic lateral load is simulated. In order to depict damages, Concrete Damage Plasticity (CDP), a damage model based on plasticity, is adopted. Concrete crushing and tensile cracking are the primary failure mechanisms as per CDP. The CDP parameters are determined by employing modified Kent and Park model for concrete compressive behavior and an exponential relation for tension stiffening. The performance of the bridge pier is investigated using an existing evaluation criterion. The influence of the stress–strain relation, the compressive strength of concrete, and geometric configuration are taken into consideration during the parametric analysis. It has been observed that the stress–strain relation, concrete strength, and configuration all have a significant impact on the column response.

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Section: Methodsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Non-linear finite element modeling of damages in bridge piers subjected to lateral monotonic loading

Ahmad,

Ahmed,

Iqbal

et al. 2023

Sci Rep

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show abstract

“…However, although the GSS connection provides an effective interconnection of rebar for precast segmental bridge piers, the concrete at the joint remains non-continuous, setting these piers apart from cast-in-place piers in terms of the overall integrity and seismic performance [22]. Extensive research indicates that precast segmental piers connected with a GSS connection exhibit inferior strength and displacement ductility compared to their cast-in-place counterparts [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Quasi-Static Cyclic Tests of Precast Two-Column Bent Connected with Both Grouted Splice Sleeves and Grouted Central Tenon

Zhuo,

Tong,

et al. 2023

Applied Sciences

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Owing to the advantages of accelerated construction, reduced traffic disturbance, and enhanced quality control, precast segmental two-column bents are extensively utilized in urban and highway bridges, particularly in areas of low-to-medium seismicity. However, the application of this technique in high-seismicity regions is limited owing to insufficient knowledge about the seismic performance of such precast bents. To address this, the present study investigates the seismic performance of precast segmental two-column bents, focusing on the connection of “grouted splice sleeves and grouted central tenon”, namely the proposed GSS-GCT connection. For this purpose, three large-scale two-column bent specimens were fabricated and subjected to quasi-static cyclic tests: one cast-in-place bent, one precast two-column bent with conventional grouted splice sleeves, and another with the GSS-GCT connection. The benefits of the GSS-GCT connection under high seismic activities were demonstrated regarding lateral load-carrying capacity, displacement ductility, energy dissipation capacity, and residual displacement. Moreover, five levels of damage states were qualitatively and quantitatively divided based on experimental observation, which can be evaluated with lateral displacements. Furthermore, seismic assessments of the two-column bents were obtained using the capacity spectrum method. The proposed GSS-GCT connection could significantly improve the seismic performance of precast segmental two-column bents under high-level earthquakes.

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“…To restore the bearing capacity of damaged columns, several methods have been developed to provide additional reinforcement, including the enlarging section method [ 5 , 6 ], steel plate method [ 7 , 8 ], steel mesh wrap method [ 9 , 10 ], FRP strip method [ 11 , 12 ], and FRP jacketing method [ 13 , 14 ]. Although steel material and concrete material are easy and cheap to obtain, additional concrete mortar is required in these steel methods.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Seismic Performance of Precast Columns Repaired with CFRP Fabrics

Liu

Song

et al. 2022

Materials

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Earthquakes worldwide highlight the seismic vulnerability of reinforced concrete (RC) bridge columns. RC bridges are likely to collapse or lose service function due to damage to the bridge columns from strong earthquakes. Rapid repair of RC bridge columns is of great significance for maintaining traffic lines for emergency rescue work after earthquakes. In this study, an improved rapid repair method was developed to restore the bearing capacity of a damaged precast column after earthquake damage. A cyclic loading test was performed to simulate the seismic loading. The original column and the repaired column were both tested. The test results showed that the bearing capacity of the repaired columns was increased by 8%, and the energy dissipation capacity was 53% higher than that of the original column. The ductility decreased because the test for the repaired specimen ended in advance. The initial stiffness of the repaired columns was reduced, but the stiffness was significantly developed in the later loading stage. The rapid repair method proposed in this study exhibited an excellent effect on restoring the seismic resistance of the damaged columns.

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UHPC jacket retrofitting of reinforced concrete bridge piers with low flexural reinforcement ratios: experimental investigation and three-dimensional finite element modeling

Cited by 15 publications

References 26 publications

Non-linear finite element modeling of damages in bridge piers subjected to lateral monotonic loading

Non-linear finite element modeling of damages in bridge piers subjected to lateral monotonic loading

Quasi-Static Cyclic Tests of Precast Two-Column Bent Connected with Both Grouted Splice Sleeves and Grouted Central Tenon

Experimental Study on Seismic Performance of Precast Columns Repaired with CFRP Fabrics

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