Seismic response of horizontally curved bridges in combination with skewed abutments

Gupta, Tanmay; Sandhu, Dikshit

doi:10.1016/j.istruc.2021.12.068

Cited by 9 publications

(3 citation statements)

References 36 publications

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“…Brinissat M et al [22] applied the response spectrum method to evaluate the seismic responses of a prestressed reinforced concrete girder. Gupta T et al [23] used the response spectrum method to calculate a numerical model of a three-span bridge with different inclination and curvature angle combinations, and the seismic behavior of a curved bridge under various combinations was discussed. Chen et al [24] applied the response spectrum method to a long-span cablestayed bridge and studied the influence of seawater depth on the seismic characteristics and seismic response of bridges near the sea.…”

Section: Introductionmentioning

confidence: 99%

Response Characteristics of Irregular Continuous Rigid Frame Bridges with Long-Span and High-Rise Piers under Ground Motion Excitations with Different Fault Distances

Huang,

Yu,

Shan

2024

Sustainability

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An innovative seismic performance evaluation strategy for irregular rigid frame bridges with a long-span and high-rise piers under the action of ground motions with different fault distances is presented in this paper. A total of 129 mainshock records taken during the Wenchuan earthquake, from national seismic stations with different fault distances, were analyzed using statistical methods, to determine the attenuation characteristics of the intensity index of the Wenchuan earthquake records from the perspective of aseismic engineering, and the attenuation of the acceleration response spectrum is discussed. The Miaoziping Bridge on the Dujiangyan–Wenchuan Expressway, which was damaged in the Wenchuan earthquake, is taken as the analysis background; two sets of samples for long-span continuous rigid frame bridges with different pier heights are constructed, to discuss the seismic response characteristics of continuous long-span rigid frame bridges; and representative values for the natural periods of these two bridge structural groups are subsequently compared and analyzed. After the peak responses for various bridges with various pier heights are determined through a response spectrum analysis under the action of ground motions with different fault distances, and the surfaces for the obtained peak responses are fitted and the response characteristics for different fault distances are discussed. It is shown in the results that the seismic response characteristics of the continuous rigid frame bridges with long-span and high-rise piers were significantly different under the action of the ground motions with different fault distances, and the seismic responses of these two bridge groups were distinctly larger under the action of near-fault ground motions. Furthermore, based on the above research, suggestions for the pier arrangement and bridge site selection for continuous rigid frame bridges with long-span and high-rise piers are also discussed. The results of this paper also provide some theoretical guidance for the sustainable development of bridges with long-span and high-rise piers, from the perspective of bridge seismic response characteristics.

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Section: Introductionmentioning

confidence: 99%

Response Characteristics of Irregular Continuous Rigid Frame Bridges with Long-Span and High-Rise Piers under Ground Motion Excitations with Different Fault Distances

Huang,

Yu,

Shan

2024

Sustainability

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“…Sometimes it is not possible to keep the bridge deck straight due to the numerous highway requirements for the efficient flow of traffic; in those instances, curved bridges are the alternative. Bridges that have a configuration that is curved are at risk of suffering serious damage as a result of the rotation of the superstructure if the seismically induced displacements are excessively large [1]- [2]. Isolation bearings have been installed on several bridges as part of the seismic modernisation process made possible by the use of contemporary seismic protection technologies.…”

Section: Introductionmentioning

confidence: 99%

Effect of radius of curvature on the seismic response of curved bridges

Agrawal,

Gupta

2024

IOP Conf. Ser.: Earth Environ. Sci.

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Curved bridges have seen widespread application in complex transportation networks, including interchanges and river crossings. If the displacements caused by an earthquake are too large, curved bridges have a greater risk of suffering serious damage due to the rotation of the superstructure. Since curved bridges are more susceptible to damage during earthquakes due to the effect of curvature, this factor also significantly influences the seismic behaviour of curved bridges. The present investigation has ascertained the impact of the radius of curvature on the seismic response of a bridge. The effect of ground motion characteristics and levels of shaking on the performance of bearings has also been studied. It has also been investigated how the bridge responds to seismic activity for both unidirectional and bidirectional effects. To determine the effect of the radius of curvature on the seismic response of the bridges, a non-isolated and isolated curved bridge with high damping rubber bearings has been considered. Bridges with varying radius of curvature (R= ∞, 315m, 157m, and 105m) have been modelled in the finite element-based software SAP 2000, and their response to three different ground motions has been observed. Isolation bearings in a bridge have been found to be more effective against seismic loads. The performance of an isolated bridge is superior to that of a non-isolated bridge when isolation bearings are installed in all of the piers and abutments. It is observed that a lower radius of curvature increases the deck displacement. It is also observed that bidirectional loading increases the seismic response of the curved bridge significantly relative to unidirectional loading.

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“…They found that the complex combination of twisting and bending of members under static or dynamic loads may produce a 33% increase in seismic demand for pier ductility. In this line, Gupta and Sandhu [24] evaluated the seismic response of a three-span continuous Reinforced Concrete (RC) skew-curved concrete box-girder bridge under different vibration situations. The results showed that in-plane moments in the longitudinal and transverse directions are considerably affected by including bridge skewness and curvature.…”

Section: Introductionmentioning

confidence: 99%

Seismic Resilience Assessment of Curved Reinforced Concrete Bridge Piers through Seismic Fragility Curves Considering Short- and Long-Period Earthquakes

Uenaga,

Omidian,

George

et al. 2023

Sustainability

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Curved bridges are commonly used for logistics and emergencies in urban areas such as highway interchange bridges. These types of bridges have complicated dynamic behaviors and also are vulnerable to earthquakes, so their functionality is a critical parameter for decision makers. For this purpose, this study aims to evaluate the bridge seismic resilience under the effects of changes in deck radius (50, 100, 150 m, and infinity), pier height irregularity (Regular and Irregular), and incident seismic wave angle (0°, 45°, and 90°) under short- and long-period records. In the first step, fragility curves are calculated based on the incremental dynamic analysis and probabilistic seismic demand models. Finally, seismic resilience curves/surfaces are constructed and their interpolated values of the log-normal distribution function presented for assessing system resilience. It is found that when long-period records are applied in one given direction, the angle of incidence has the most significant effect on seismic resilience, and bridges are most vulnerable when the angle of incidence tends to 0°. The effect of deck radius on seismic resilience became more remarkable as the angle of incidence increased. Additionally, results indicate that the bridge vulnerability in long-period records is more significant than that under short-period records.

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Seismic response of horizontally curved bridges in combination with skewed abutments

Cited by 9 publications

References 36 publications

Response Characteristics of Irregular Continuous Rigid Frame Bridges with Long-Span and High-Rise Piers under Ground Motion Excitations with Different Fault Distances

Response Characteristics of Irregular Continuous Rigid Frame Bridges with Long-Span and High-Rise Piers under Ground Motion Excitations with Different Fault Distances

Effect of radius of curvature on the seismic response of curved bridges

Seismic Resilience Assessment of Curved Reinforced Concrete Bridge Piers through Seismic Fragility Curves Considering Short- and Long-Period Earthquakes

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