Seismic response of rocking isolated railway bridge piers with sacrificial components

Xia, Xiushen; Wu, Suiwen; Shi, Jun; Jia, Junfeng; Chen, Xingchong; Ma, Huajun

doi:10.1007/s11803-020-0610-x

Cited by 19 publications

(4 citation statements)

References 35 publications

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“…As mentioned in various experiments, 1,2 concrete cracks, even spalling, are usually observed on the rocking interface, and the impact events may further exacerbate the damage. The seismic responses of the rotation point (cross‐section edge point) on the rocking interface were obtained, as shown in Figure 13.…”

Section: Influence Of the Impact Effect On The Seismic Responsementioning

confidence: 96%

“…Free-standing rocking model. 11 quasi-static experiments, the shaking table tests 1,2 presented that impact events on the rocking interface would frequently occur during the rocking process and may cause extra energy loss, higher contact stress, and even unexpected damage. Nazari 3 studied the energy dissipation performance of a single precast concrete rocking wall without a damper during an earthquake.…”

Section: F I G U R Ementioning

confidence: 99%

“…PT and damper can provide the ability of SC and energy dissipation, the reinforced contact segment can reduce or prevent the concrete damage on the rocking interface. Therefore, due to the rocking‐interface‐opening mechanism, comparing with the motion behaviors in the quasi‐static experiments, the shaking table tests 1,2 presented that impact events on the rocking interface would frequently occur during the rocking process and may cause extra energy loss, higher contact stress, and even unexpected damage. Nazari 3 studied the energy dissipation performance of a single precast concrete rocking wall without a damper during an earthquake.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical investigation on the impact effect in dynamic analysis of self‐centering pier system based on the Hertz contact‐pounding model

Zhang

et al. 2023

Earthq Engng Struct Dyn

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The self‐centering (SC) pier system exhibits different mechanical behaviors under an earthquake compared with that in quasi‐static experiments, especially the impact effect on the rocking interface. Published theoretical analysis and experiments had indicated that the impact events significantly affected the rocking motion, including extra energy dissipation, greater contact stress, and even more serious damage. To describe the impact mechanism more clearly and obtain the impact responses more directly, this study investigates a dynamic theoretical model considering the impact effect and its influences on the seismic responses and rocking interface. First, a dynamic theoretical model based on the Hertz contact‐pounding model specific to the SC pier system is proposed, and the impact mechanism is described in detail. Subsequently, dynamic motion equations considering the impact effect are derived. The key parameters of the contact‐pounding element (stiffness KHertz and damping CHertz) that significantly affect the impact process are presented. The accuracy of the proposed theoretical model is verified by test data and a finite element model (FEM). Finally, the influences of the key parameters (KHertz and CHertz) on the impact force are analyzed, and the impact effect on the rocking interface is investigated. The results indicate that the impact effect significantly increases the vertical acceleration and contact stress, particularly under near‐fault earthquakes. This may cause unexpected damage on the rocking interface and should be an important consideration in the optimize design of SC pier system.

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Section: Influence Of the Impact Effect On The Seismic Responsementioning

confidence: 96%

Section: F I G U R Ementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Theoretical investigation on the impact effect in dynamic analysis of self‐centering pier system based on the Hertz contact‐pounding model

Zhang

et al. 2023

Earthq Engng Struct Dyn

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“…Rocking is also a promising seismic response modification technique, both for bridges and buildings, with practical applications in the former USSR and New Zealand. Applications in buildings may comprise a soft-rocking-story mechanism [35][36][37], or a rocking wall [38,39], whereas in bridges, rocking piers [40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56]. Several analytical studies investigated the response of rocking structures combined with external dampers or restraining tendons [57][58][59][60].…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Rocking and Sliding Cylindrical Columns Under Seismic Excitation

Katsamakas¹,

Vassiliou²

2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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This paper presents a finite element (FE) modeling approach for simulating the 3D response of a free-standing cylindrical column. The model is validated against experimental results, which involved testing of the cylindrical steel column under a set of 100 bidirectional ground motions. The specimen was free-standing and allowed to slide and rock in all directions. Both the tested specimen and the shake table platen were stiff enough to be modeled as rigid. The contact surface was modeled using Coulomb friction for the tangential behavior and stiff contact for the normal direction. Two energy dissipation mechanisms were modelled; friction and radiation damping. Since Rayleigh damping is not directly linked to the physical problem, it was set equal to zero. It has been proven that the response of a single column to an individual ground motion is a chaotic and unpredictable problem. Therefore, a statistical approach was utilized to compare the numerical to the experimental results, using the cumulative distribution function (CDF) for the main response quantities (i.e., maximum displacement at the top of the column and residual displacement), demonstrating satisfying agreement. The influence of the friction coefficient was assessed through an extensive sensitivity analysis using non-linear time-history analyses. Results proved that the statistics of the response only smoothly depend on the exact value of the friction coefficient even though the response to an individual ground motion seems chaotic.

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Precast segmental piers: testing, modeling and seismic assessment of an emulative connection based on a grouted central tenon

Liu

Lei

Tong

et al. 2022

Bull Earthquake Eng

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Seismic response of rocking isolated railway bridge piers with sacrificial components

Cited by 19 publications

References 35 publications

Theoretical investigation on the impact effect in dynamic analysis of self‐centering pier system based on the Hertz contact‐pounding model

Theoretical investigation on the impact effect in dynamic analysis of self‐centering pier system based on the Hertz contact‐pounding model

Numerical Modeling of Rocking and Sliding Cylindrical Columns Under Seismic Excitation

Precast segmental piers: testing, modeling and seismic assessment of an emulative connection based on a grouted central tenon

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