Pounding Analysis of Isolated Girder Bridge under Nonpulse and Pulse-Like Earthquakes

Sha, Ben; Tao, Tianyou; Xing, Chenxi; Wang, Hao; Li, Aiqun

doi:10.1061/(asce)cf.1943-5509.0001468

Cited by 7 publications

(6 citation statements)

References 23 publications

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“…e interaction between two contact surfaces includes two components of normal contact force and tangential contact force. In this research, the hard contact behavior was set for normal contact behavior [7]. e iterative process is displayed in Figure 4.…”

Section: Explicit Contactmentioning

confidence: 99%

“…e results indicated that the spatially nonuniform ground motions increased the pounding forces [6]. Because a simplified model failed to evaluate the pounding responses, a longitudinal pounding analysis of an isolated continuous beam bridge was carried out under unidirectional ground motions, based on a multiscale simulation scheme [7]. Wei et al and He and Zhao investigated the seismic performance of bridges based on seismic blocks and pins [8,9] and found that the pounding between linear bridge structures should be between rigid body pounding and straight bar coaxial pounding.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Restrainer Piers on the Seismic Performance of Long Bridges with Equal-Height Piers

Luo

et al. 2021

Mathematical Problems in Engineering

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Pounding may occur between the main girders under the action of strong earthquakes, so as between main girders and abutments. This causes excessive longitudinal displacement of the main girder and unseating damage to bridges. Because long bridges in mountainous areas with high intensity are easy to unseat, the authors studied the influence of restrainer piers, expansion joint spacings (EJSs), and the span on the seismic performance of long bridges. The ABAQUS finite element software was used to simulate a bridge dynamic analysis model considering the elastoplasticity of the pounding effect of the pier and the beam. By inputting El-Centro, Northbridge, and Taft seismic waves, the time-history analysis of the seismic response of long bridges was carried out. The results indicated that a reasonable number of restrainer piers, an appropriate EJS, and a span could effectively reduce the maximum relative displacement of pier-beams. This behavior will improve the seismic performance of bridge structures. Moreover, for a 24-span equal-height beam bridge, the optimum seismic effect was obtained when 3 restrainer piers, an EJS of 70 mm, and a 50 m span were used.

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Section: Explicit Contactmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Restrainer Piers on the Seismic Performance of Long Bridges with Equal-Height Piers

Luo

et al. 2021

Mathematical Problems in Engineering

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“…In addition, Hao et al [ 18 ] reviewed the seismic pounding response of bridges, including impact models, numerical simulations, experimental investigations, and pounding mitigation methods. Sha et al [ 19 ] studied the pounding responses of an isolated continuous girder bridge under longitudinal non-pulsed and pulsed ground motions based on the multiscale simulation scheme. Li et al [ 20 ] experimentally studied the adjacent pounding effect of a midspan curved bridge with a longitudinal slope and analyzed the influence of connection parameters, such as gap size and longitudinal slope.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation on seismic pounding damage in a simply-supported steel bridge

Shi,

Wang,

Tong

et al. 2023

Heliyon

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“…The velocity pulse in the ground motion enlarges the elastic spectral acceleration values of structures with moderate to long periods, therefore requiring that structures have a higher ability to resist such responses. 2 Even base-isolated buildings can suffer severe damage when excited by pulse-like ground motions. The main reason is that near-field ground motions with intense and abundant long period velocity pulse components can induce excessive displacement response in the baseisolated structures.…”

Section: Introductionmentioning

confidence: 99%

“…When structures are subjected to this pulse‐type ground motions, most of the seismic energy arrives within a short time at the beginning of the record, which may generate high demands and force the structures to dissipate this input energy with few large displacement excursions. The velocity pulse in the ground motion enlarges the elastic spectral acceleration values of structures with moderate to long periods, therefore requiring that structures have a higher ability to resist such responses 2 . Even base‐isolated buildings can suffer severe damage when excited by pulse‐like ground motions.…”

Section: Introductionmentioning

confidence: 99%

A high performance hybrid passive base‐isolated system

Cao

2021

Structural Contr & Hlth

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This paper proposes a novel high performance hybrid passive base-isolated system integrating the base-isolated system (BIS) with the tuned tandem mass damper inerters (TTMDI), referred to as the BIS+TTMDI. To reveal the interaction between two components and their integrated control performance, the proposed configuration is modeled by a simplified four degree-of-freedom model together taking the dynamic characteristics of the isolation system, TTMDI, and superstructure into inclusion. Employing the optimization criterion defined as minimization of the dimensionless variance of superstructure displacement relative to the ground and by resorting to the particle swarm optimization, the system parameters of TTMDI are tuned to get their best integrated control performance. Evaluations are in turn unfolded on the performance taking into diverse TTMDI inertial properties and different isolation layer characteristics account and robustness, to fully explore the effectiveness of reducing both the displacement and acceleration for the isolation layer and superstructure, the TTMDI's energy dissipation mechanism and capacity, evolution of stiffness and damping, stroke, and structural frequency response. Subsequently, the findings of the BIS+TTMDI in the frequency domain is further tested via the time history analyses using the real records including both near-field with pulse and far-field earthquakes. In two analysis domains, the integrated performance of the proposed BIS+TTMDI is compared not only to the BIS but also to the BIS+TMDI, as well as to the BIS+TTMD and BIS +TMD. Results confirm that the BIS+TTMDI is a high performance system, namely, with high control effectiveness, high robustness, highly smaller stroke, and drastically reduced damping demand.

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Pounding Analysis of Isolated Girder Bridge under Nonpulse and Pulse-Like Earthquakes

Cited by 7 publications

References 23 publications

Influence of Restrainer Piers on the Seismic Performance of Long Bridges with Equal-Height Piers

Influence of Restrainer Piers on the Seismic Performance of Long Bridges with Equal-Height Piers

Numerical simulation on seismic pounding damage in a simply-supported steel bridge

A high performance hybrid passive base‐isolated system

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