Effect of earthquake-induced transverse poundings on a 32 m span railway bridge isolated by friction pendulum bearings

Meng, Dongliang; Yang, Mei; Yang, Ziqi; Chouw, Nawawi

doi:10.1016/j.engstruct.2021.113538

Cited by 18 publications

(3 citation statements)

References 50 publications

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“…Scholars have conducted experimental studies on the impact of bearing friction on continuous beam bridges under earthquake action. They analyzed the seismic effects of bridges equipped with lead pot bearings, friction pendulum bearings, and self-centering bearing and further discussed the influence of bearing friction on structural seismic effects (Meng et al, 2022;Wei et al, 2024;Zhang et al, 2022). Friction in bridge bearings has a significant impact on vibration characteristics, for instance, natural frequency and structural damping ( Ülker-Kaustell and Karoumi, 2013), and when friction effect dominates in Friction Pendulum System, collisions can cause fluctuations in the Friction Pendulum System displacement time-history curve (Wei et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Nonlinear model of bridge bearings considering friction effect under horizontal seismic action

Yang,

Zhang,

Zheng

et al. 2024

Advances in Structural Engineering

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Bearings are regarded as a crucial element that impacts the overall performance of the seismic analysis of bridges. The assessment of seismic performance in bridges heavily depends on the nonlinear features of bridge bearings. Therefore, it is essential to simulate the nonlinear mechanical behavior of bridge bearings to attain the required accuracy of seismic analysis. This paper examines the friction features of pot bearings using the Bouc-Wen hysteretic model, based on which a nonlinear model of pot bearings is proposed. The proposed model can rapidly and effectively analyze the nonlinear mechanical behaviors of bridge bearings under horizontal earthquakes by adequately simplifying the mechanical properties of these bearings. The accuracy of the model for horizontal seismic effects analysis is validated using a numerical simulation method. The simulation compares the nonlinear model seismic effects of the bearing with a linear-elastic model that ignores the bearing frictional effects under horizontal seismic action. The results demonstrated that in the proposed nonlinear model, the ratio of the composite bending moment and yield bending moment of the pier bottom section (demand capacity ratio) is lower than that of the linear elastic model, leading to a more accurate analysis of horizontal seismic effects and thus preventing overestimation of seismic consequences.

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Section: Introductionmentioning

confidence: 99%

Nonlinear model of bridge bearings considering friction effect under horizontal seismic action

Yang,

Zhang,

Zheng

et al. 2024

Advances in Structural Engineering

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“…Xu et al [9] proposed a new type of shear key for the retrofit of existing highway bridges and further studied their seismic pounding damage under repeated monotonic loading. Meng et al [10] studied the performance of steel keys in seismic pounding events of bridges via shake table experiments and discussed the influence of gap size. These studies further discussed the problem of bridge pounding damage in further detail through refined finite element models and experiments.…”

Section: Introductionmentioning

confidence: 99%

Influence of Lower Lateral Bracing on the Seismic Pounding Damage to Slab-On-Girder Steel Bridges

Shi,

Wang,

Tong

et al. 2023

Applied Sciences

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During strong seismic events, seismic-induced pounding has been observed to cause damage to bridges. Previous studies on seismic-induced bridge pounding responses have generally focused on reinforced concrete bridges. However, the seismic damage between steel and reinforced concrete beams is significantly different, and research on steel beams’ seismic pounding response remains limited. Therefore, this paper adopts the multiscale fine three-dimensional numerical simulation method to study the seismic response of a slab-on-girder steel bridge. The numerical results show that the lower lateral bracing has a significant effect on seismic damage to steel beams. The lower lateral bracing can share about 1/3 of the pounding action and reduce the displacement angle of the steel beam by 40%. Under horizontal two-way seismic action, the lower lateral bracing significantly reduces the stress on the steel beam. In addition, the bracing should have continuous stiffeners to avoid connection failure. Generally, the lower lateral bracing should be considered in the design of the slab-on-girder steel bridge. It significantly improves the lateral seismic performance of the bridge and reduces seismic damage to steel beams.

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“…In bridge structures, usually with a small gap at the expansion joints, an increase of the top displacement means an increase of pounding potential, especially at the interface between the girder and the abutment. Despite the fact that bridges are highly susceptible to pounding damage during earthquakes (Wood and Jennings, 1971; Chouw, 1996; Chouw and Hao, 2012; Li et al, 2012; Kun et al, 2015; Yang et al, 2019a, 2019b; Meng et al, 2022), most studies on the response of bridges with rocking footings ignored the effect of pounding. Only a few studies have considered pounding and rocking footing at the same time.…”

Section: Introductionmentioning

confidence: 99%

Effect of pier height and support flexibility on seismic response of bridges including poundings

Yang

Meng

Chouw

2022

Advances in Structural Engineering

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In conventional seismic design, bridges usually are assumed to be fixed to a rigid support. This assumption, however, does not correspond to the reality of bridges with shallow footings since they can rock in strong earthquakes. It has been recognised that several factors significantly affect the response of bridges with rocking footings, including support flexibility, pier height and pounding. Most studies so far have mainly focused on a single factor. This research aims to narrow the knowledge gap by investigating the combined effect of pier height, support condition and earthquake characteristics on bridges with rocking ability. A series of shake table experiments on a single-frame bridge with different pier heights and support conditions under hard, medium and soft soil excitations were carried out. The influence of support flexibility was examined by comparing the response of rocking bridges on rigid support with that on soil support. The result shows that regardless of the flexibility of the support, in the case of no pounding, it is beneficial to take rocking footing into account because the maximum bending moment at the pier support can be reduced. However, when pounding was considered, the combined effect can generate an even larger maximum bending moment than that of the fixed-base bridge.

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Effect of earthquake-induced transverse poundings on a 32 m span railway bridge isolated by friction pendulum bearings

Cited by 18 publications

References 50 publications

Nonlinear model of bridge bearings considering friction effect under horizontal seismic action

Nonlinear model of bridge bearings considering friction effect under horizontal seismic action

Influence of Lower Lateral Bracing on the Seismic Pounding Damage to Slab-On-Girder Steel Bridges

Effect of pier height and support flexibility on seismic response of bridges including poundings

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