A method for linear response analysis of long bridges under multi-support seismic excitation

Parvanehro, P.; Shiravand, M.R.; Safi, Mohammad

doi:10.1007/s10518-022-01517-6

Cited by 3 publications

(4 citation statements)

References 36 publications

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“…The spatially varying ground motion phenomenon is well recognized in regions with natural seismicity [12][13][14], but, to the best of the authors' knowledge, it is rarely referred to in the context of mining-induced tremors [15][16][17]. Also, most studies of bridges and other multiple-supports structures focus on their responses to spatiotemporal variation in ground motion resulting from natural earthquakes [18][19][20][21][22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

“…Studies by Parvanehro et al, Papadopoulos et al, Kumar, and Bakhshizadeh et al [18][19][20][21] illustrate various approaches used to estimate the responses of bridges to spatially varying kinematic excitation. The authors explored the main phenomena contributing to the nonuniformity of ground motion, such as the wave passage effect, coherency loss, and the site effect.…”

Section: Introductionmentioning

confidence: 99%

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On the Susceptibility of Reinforced Concrete Beam and Rigid-Frame Bridges Subjected to Spatially Varying Mining-Induced Seismic Excitation

Boroń,

Drygała,

Dulińska

et al. 2024

Materials

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This paper aims to identify the optimal reinforced concrete bridge construction for regions at risk of mining-induced seismic shocks. This study compares the performances of two common bridge types made of the same structural tissue, i.e., a reinforced concrete beam bridge and rigid-frame bridge under real mining-induced tremors using uniform and spatially varying ground motion models. This study investigates the dynamic responses of the bridges depending on wave velocity and assesses their susceptibility to mining-triggered tremors based on the contribution of quasi-static and dynamic effects in the global dynamic responses of the bridges. This study revealed significant changes in dynamic response under spatially varying ground excitation for both bridge types. It was observed that rigid-frame bridges show higher susceptibility to quasi-static effects due to their stiffness, whereas beam bridges are more susceptible to dynamic stresses. This study recommends that in regions with mining tremors, the choice between bridge types should consider the possibility of limiting individual components of stress. A solution may involve the reduction in quasi-static components through structural reinforcement or decreasing dynamic components by using vibration absorbers. It was found that beam bridges are more cost-effective and practical in mining-affected areas, especially when founded on weak grounds.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On the Susceptibility of Reinforced Concrete Beam and Rigid-Frame Bridges Subjected to Spatially Varying Mining-Induced Seismic Excitation

Boroń,

Drygała,

Dulińska

et al. 2024

Materials

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“…A large number of studies have been carried out on the influence of ground vibration field effects on the seismic response of bridge structures [5][6][7][8][9][10][11][12]. For example, Bonganoff [5] firstly noted the effect of ground transfer time on the response of long structures in 1965.…”

Section: Introductionmentioning

confidence: 99%

“…A comprehensive analysis was conducted to assess the sensitivity of curved beam bridges to the spatial variability of earthquake ground motion (SVEGM) by considering different apparent wave velocities, site conditions, and coherence types. Parvanehro P. et al [7] recommended an alternative combination rule for bridge response estimation under multi-point excitation, and used random vibration analysis to calculate the correlation coefficient between the two responses. The longitudinal and transverse simplified mathematical models of the bridge were established.…”

Section: Introductionmentioning

confidence: 99%

Shaking Tables Test on Seismic Responses of a Long-Span Rigid-Framed Bridge Considering Traveling Wave Effect and Soil–Structure Interaction

Yan,

Cao,

Zhao

2024

Buildings

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The traveling wave effect and soil–structure interaction have significant influence on the seismic response of large-span bridges with complex site conditions. In this paper, a 1/10 scaled-down large-span rigid-framed bridge model was designed and fabricated, and a shaking tables test considering the traveling wave effect and soil–structure interaction was carried out on a large-scale continuous rigid bridge model by a real-time substructure hybrid test technique. Influences of the traveling wave effect and soil–structure interaction on the seismic responses of the rigid-framed bridge specimen were systematically analyzed with experimental data. The test results showed that when the apparent wave speed was small, the traveling wave effect increased the seismic responses of the rigid-framed bridge. With the increase in apparent wave speed, the structural response under traveling wave excitation and uniform excitation was basically the same. The SSI effect lead to a great change in the seismic input peaks and spectral characters at the bottom of the pier, and increased the seismic responses of the rigid-framed bridge. When both traveling wave and the SSI effect were considered, there was a phase difference in the seismic excitation. The dynamic responses of a continuous rigid-framed bridge could not be simply obtained by superposition of the separate traveling wave effect or SSI effect. Meanwhile, the real-time substructure test method in this paper solved the problems that the traditional soil box experiment cannot be applied to the test of a large-scale model, the soil and bridge structure find it difficult to meet the unified similarity ratio, and the boundary conditions are difficult to simulate accurately.

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Research progress and prospects on pier-type submerged floating tunnels

Lu,

Liu,

2024

Ocean Engineering

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A method for linear response analysis of long bridges under multi-support seismic excitation

Cited by 3 publications

References 36 publications

On the Susceptibility of Reinforced Concrete Beam and Rigid-Frame Bridges Subjected to Spatially Varying Mining-Induced Seismic Excitation

On the Susceptibility of Reinforced Concrete Beam and Rigid-Frame Bridges Subjected to Spatially Varying Mining-Induced Seismic Excitation

Shaking Tables Test on Seismic Responses of a Long-Span Rigid-Framed Bridge Considering Traveling Wave Effect and Soil–Structure Interaction

Research progress and prospects on pier-type submerged floating tunnels

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