Integral abutment bridges: Investigation of seismic soil‐structure interaction effects by shaking table testing

Fiorentino, Gabriele; Cengiz, Cihan; Luca, Flavia De; Mylonakis, George; Karamitros, Dimitris K; Dietz, Martin; Dihoru, Luiza; Lavorato, Davide; Briseghella, Bruno; Isaković, Tatjana; Vrettos, Christos; Gomes, António Topa; Sextos, Anastasios; Nuti, Camillo

doi:10.1002/eqe.3409

Cited by 37 publications

(7 citation statements)

References 74 publications

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“…The specimen of the scaled SDOF structure with pile foundations is shown in Figure 4. The scaled soil with a density, height, and shear wave velocity of 1.1 ton/m 3 , 1.25 m, and 120 m/s was placed in a laminated shear soil box [29][30][31] with a clear size of 2.9 m × 2.0 m × 1.54 m. The time-history curves of the seismic records used in the free field test and SSI test are shown in Figure 5. The acceleration in the center of the surface soil was measured in the free field test, and the acceleration at the top of structure was measured in the SSI test.…”

Section: Validation Of Numerical Modelmentioning

confidence: 99%

Parametric Analysis on the Effect of Dynamic Interaction between Nonlinear Soil and Reinforced Concrete Frame

Wang

Yang

2022

Applied Sciences

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The effect of dynamic soil–structure interaction on the seismic demand of a reinforced concrete frame is of great significance to seismic design, retrofit, and damage evaluation. To investigate the degree of influence of the consideration of the soil–structure interaction on the structural seismic response, an efficient numerical model considering the nonlinearities of both a reinforced concrete frame and soil was developed and validated against a shaking table test. Subsequently, detailed parametric analyses on the dynamic soil–structure interaction effect were conducted, where the influences of the length and diameter of the pile, span number and frequency of the structure, soil property, and natural uncertainty of the seismic record were investigated. The research results indicate that the base shear of the pile-supported reinforced concrete frame generally increases with a larger pile length and pile diameter. The influence of the span number and pile diameter on the soil–structure interaction effect is up to 40% in some cases while that of the pile length is within 10% in general. Consideration of the soil–structure interaction can also considerably increase the structural base shear in certain cases and the growth can be greater than 30%. The dynamic soil–structure interaction effect predominantly depends on the structure frequency, spectral characteristic and peak acceleration of the seismic record, and soil shear wave velocity while the influence of the pile diameter and number of spans cannot be neglected in some cases.

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Section: Validation Of Numerical Modelmentioning

confidence: 99%

Parametric Analysis on the Effect of Dynamic Interaction between Nonlinear Soil and Reinforced Concrete Frame

Wang

Yang

2022

Applied Sciences

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“…These research results provide technical support for the reinforcement backfill treatment engineering practice. Fiorentino et al [18] experimentally investigated the potential benefits of adding compressible inclusions (CIs) between the abutment and the backfill and explored the influence of different types of connection between the abutment and the pile foundation. Results indicate that the CI reduces the acceleration on the bridge deck and the settlements in the backfill.…”

Section: Introductionmentioning

confidence: 99%

Centrifugal Model Test and Simulation of Geogrid Reinforced Backfill and EPS Interlayer on Bridge Abutment

Zheng

Fang

2022

Sustainability

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In this paper, the use of geotechnical centrifuge and numerical modeling techniques to investigate the influence of geogrid reinforcement and EPS interlayer on the lateral earth pressure and the backfill surface settlements behind gravity abutment and pile-supported abutment is reported. According to the principle of equal strain, the abutment back structure, foundation, backfill material, grid and interlayer material were simulated, and the centrifugal model test for two types of abutments was carried out with a model scale of n = 62.5, 40, respectively. The tests showed that the reinforcement of the geogrid could reduce the surface settlement of backfill and the lateral earth pressure of the backfill on the back of abutment. After setting the EPS interlayer, the influence of abutment displacement on earth pressure could be eliminated, and the earth pressure of the backfill material on the abutment back was significantly reduced. The “interlayer + geogrid” structure further reduced the earth pressure of backfill material on the abutment back. The existence of the EPS interlayer adjusted the strain distribution of the reinforced material, significantly increasing the strain of the reinforced material near the abutment, which was conducive to the reinforcement effect. The above research conclusions could provide a basis for the design and practical application of abutment backfill materials.

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“…However, seismic excitation induces higher inertial loads than anticipated passive Earth pressure conditions [32]. Under certain design considerations, abutments also participate in the earthquake-resisting system (ERS) of the bridge [33,34]. Abutment modeling reduces seismic responses and column ductility demands up to 80% [8].…”

Section: Introductionmentioning

confidence: 99%

Influence of Abutment Stiffness and Strength on the Seismic Response of Horizontally Curved RC Bridges in Comparison with Equivalent Straight Bridges at Different Seismic Intensity Levels

Heydarpour

Tehrani

2022

Shock and Vibration

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Seismic design codes have imposed some limitations on the maximum subtended angle of curved bridges and allow engineers to analyze and design them using an equivalent straight bridge. This paper investigates these limitations and evaluates the AASHTO code recommendations regarding the prediction of the seismic responses of curved bridges using an equivalent straight bridge for bridges with different abutment properties at different seismic hazard levels. In this regard, the seismic responses of 21 horizontally curved and straight RC four-span bridges with different abutment types are investigated. In 7 bridge models, soil-abutment-bridge interaction is neglected, while in the rest of the bridge models, the seat-type abutments with the participation of the nonlinear backfill soil, gap, and abutment piles are used in structural modeling. First, nonlinear static (pushover) analyses are carried out to evaluate the overall behavior of the bridges with different abutment configurations in the two perpendicular principal directions. Subsequently, nonlinear time history analyses are performed to predict the seismic response of bridge elements, including column drifts and deck displacements at the place of the abutments in the radial and tangential directions at different seismic intensity levels, including the design basis earthquake (DBE) and maximum credible earthquake (MCE) excitation levels. In addition, the actual maximum displacements of the components of the bridges (i.e., the total absolute displacements) were also predicted and evaluated for different cases. It was found that the abutment properties and boundary conditions had a significant effect on the seismic response assessment of curved bridges compared to straight bridges, while such parameters are not currently considered by the design codes. The results also indicated that by increasing the seismic intensity level, more limitations should be imposed on the use of the equivalent straight bridges.

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Integral abutment bridges: Investigation of seismic soil‐structure interaction effects by shaking table testing

Cited by 37 publications

References 74 publications

Parametric Analysis on the Effect of Dynamic Interaction between Nonlinear Soil and Reinforced Concrete Frame

Parametric Analysis on the Effect of Dynamic Interaction between Nonlinear Soil and Reinforced Concrete Frame

Centrifugal Model Test and Simulation of Geogrid Reinforced Backfill and EPS Interlayer on Bridge Abutment

Influence of Abutment Stiffness and Strength on the Seismic Response of Horizontally Curved RC Bridges in Comparison with Equivalent Straight Bridges at Different Seismic Intensity Levels

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