Theory and experimental verification of a resultant response-based method for assessing the critical seismic excitation direction of curved bridges

Feng, Ruiwei; Deng, Tongfa; Lao, Tianpeng; Sextos, Anastasios; Yuan, Wancheng

doi:10.1016/j.engstruct.2020.110713

Cited by 15 publications

(3 citation statements)

References 62 publications

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“…More recently, researchers have focused on the seismic vulnerability assessment of curved bridges [17][18][19][20]. Some researchers recently developed some methods of identifying the critical seismic input angles for curved bridges and compared simulation results with shake table experiments [21,22]. These methods demonstrated good accuracy but took high computational costs.…”

Section: Introductionmentioning

confidence: 99%

A Method to Identify the Critical Seismic Input for Curved Bridges

Tao

Guan

2023

CivilEng

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To address the rapidly growing demands of traffic congestion, more highway bridges have been constructed, especially curved bridges. With more curved bridges designed and constructed, people have conducted a comprehensive analysis of the structural performance. Due to the nature of the structural complexity of curved bridges, dynamic responses of the curve bridges vary dramatically from the standard linear bridges. Although some work has been conducted to investigate the curved bridge dynamic analysis under seismic inputs, the framework for analyzing the curved bridges’ vulnerability under various angles of inputs is still lacking. In this paper, we conducted a series of curved bridge seismic analyses based on different inputs and conducted a parametric study of the bridge performance using finite element models. We conducted time history analyses by applying seismic inputs to investigate the bridge dynamic responses based on different angle inputs and other different structural parameters. We developed an approach identifying the most vulnerable direction of the seismic inputs and the strongest dynamic responses for curved bridges based on time series analysis. This approach was validated with the dynamic analysis of a simplified bridge model. The method developed in this paper will help improve the curved bridge design code and further provide suggestions about mitigating seismic response for device design.

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Section: Introductionmentioning

confidence: 99%

A Method to Identify the Critical Seismic Input for Curved Bridges

Tao

Guan

2023

CivilEng

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“…They found that the responses of the bridge are not sensitive to the directionality of the input wave, and the maximum responses can be evaluated by the responses in longitudianl and transverse directions [15]. Feng et al (2020) developed a method to evaluate the maximum response of a curved bridge for the different seismic incidents. To verify the results, an experimental sample bridge was utilized, and the outcomes indicated that the method has acceptable accuracy in evaluating the input seismic angles [16].…”

Section: Introductionmentioning

confidence: 99%

“…Feng et al (2020) developed a method to evaluate the maximum response of a curved bridge for the different seismic incidents. To verify the results, an experimental sample bridge was utilized, and the outcomes indicated that the method has acceptable accuracy in evaluating the input seismic angles [16]. Ramos-Sepulveda and Cabas, (2021) investigated the effect of site condition on the directionality of ground motions and the corresponding effects on the seismic response of structures.…”

Section: Introductionmentioning

confidence: 99%

Effect of the angle of seismic incidence on the response of a long-span curved bridge under spatially varying ground motions

Hosseinnezhad

Gholizad

2022

NMCE

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The incidence angle of seismic waves affects the maximum response of bridges. Furthermore, long-span structures experience different seismic excitations at supports because of the spatial variability of ground motions. Moreover, for curved bridges, because of the irregular shape and the interaction between bending and torsion, the maximum response of the structure would be correlated to the input angle of the earthquake. In this study, the dynamic response of a longspan reinforced concrete curved bridge under asynchronous input motions for different inclinations of seismic incidence was investigated. For the numerical study, a curved plan bridge from the Caltrans bridges portfolio is selected and analyzed for various load and soil scenarios. The correlated arrays are generated by the method described in the paper and implemented to investigate the bridge. From the outcomes, the directionality effect of ground motions is evident that the responses change corresponding to the input angle of the seismic wave. For the case of multiple support excitations, the maximum response is different from the uniform load pattern. Finally, to find the most unfavorable input angles, an incremental dynamic analysis was performed. The results showed that the maximum response for each column occurs for different angles of earthquake incidence. The results showed that the responses of the structure increased under some angles of incidence. Additionally, responses from multiple-support were more varied in comparison with uniform excitations under different input angles, and in some cases larger than the responses caused by uniform excitations.

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Assessing residual deformation of bridge piers under bidirectional near-fault motions with forward directivity and fling-step

Santra

Roy

2023

Bull Earthquake Eng

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Theory and experimental verification of a resultant response-based method for assessing the critical seismic excitation direction of curved bridges

Cited by 15 publications

References 62 publications

A Method to Identify the Critical Seismic Input for Curved Bridges

A Method to Identify the Critical Seismic Input for Curved Bridges

Effect of the angle of seismic incidence on the response of a long-span curved bridge under spatially varying ground motions

Assessing residual deformation of bridge piers under bidirectional near-fault motions with forward directivity and fling-step

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