Nonlinear seismic response of a base isolated single pylon cable-stayed bridge

Han, Qiang; Wen, Jianian; Du, Xiuli; Zhong, Zilan; Hao, Hong

doi:10.1016/j.engstruct.2018.08.077

Cited by 19 publications

(6 citation statements)

References 33 publications

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“…Therefore, it is essential to study the nonlinear seismic behaviours, especially potential failure progress and collapse mechanisms, of these long‐span bridges to assist their inspection and maintenance, help them survive strong earthquakes and maintain their functionality. Many existing studies have used the finite element (FE) method to understand seismic behaviours and evaluate the seismic performance of bridge structures 4‐11 . However, long‐span cable‐stayed bridges are usually larger in size and much more complex than conventional bridges, with a large number of connected components and materials.…”

Section: Introductionmentioning

confidence: 99%

“…Many existing studies have used the finite element (FE) method to understand seismic behaviours and evaluate the seismic performance of bridge structures. [4][5][6][7][8][9][10][11] However, long-span cable-stayed bridges are usually larger in size and much more complex than conventional bridges, with a large number of connected components and materials. Owing to the complexity of the structural system, research on earthquake-induced failure progress of a long-span cable-stayed bridge is limited and seldom seen in public literature.…”

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confidence: 99%

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Collapse prognosis of a long‐span cable‐stayed bridge based on shake table test and nonlinear model updating

Lin

et al. 2020

Earthq Engng Struct Dyn

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The collapse of long-span cable-stayed bridges under strong earthquakes will not only result in severe casualties and loss of property but also significantly delay the rehabilitation of the affected area. It is therefore essential to study the failure progress and potential collapse mechanisms of these bridges under strong earthquakes for assisting their inspection and maintenance and helping them survive an earthquake. Collapse simulations in existing studies are commonly conducted with design-document-based finite element (FE) models, which usually neglect the actual damage state of the bridges. The influences of modelling uncertainties on the simulated responses cannot be addressed. This study proposes a nonlinear FE model updating-based collapse prognosis method for long-span cable-stayed bridges, which includes (1) a correlatedupdating-parameter-based nonlinear FE model updating algorithm, (2) a restarted time history analysis-based seismic response prediction method and (3) an elemental deactivation-based collapse simulation algorithm. The shake table test of a scaled Sutong cable-stayed bridge in China is adopted to illustrate the proposed earthquake-induced collapse prognosis method. A refined FE model of the bridge is first established and nonlinearly updated using the measurement data. The collapse prognosis of the bridge under a subsequent strong ground motion is then performed based on the updated model. The predicted structural responses and final failure mechanisms are compared with the measured responses and experimental observations with good agreement, indicating that the proposed method is feasible and accurate for evaluating the seismic performance and failure mechanisms of long-span cable-stayed bridges. K E Y W O R D S collapse prognosis, long-span cable-stayed bridge, nonlinear FE model updating, restarted time history analysis, shake table test 1 | INTRODUCTION With the rapid development of global economy, many long-span bridges have been constructed worldwide over the last few decades. These long-span bridges usually serve as critical infrastructures in urban transportation systems, and many

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Collapse prognosis of a long‐span cable‐stayed bridge based on shake table test and nonlinear model updating

Lin

et al. 2020

Earthq Engng Struct Dyn

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“…e experiment conducted by Wei et al [5] also indicated that fluid-structure interaction had significant effects on the dynamic response of bridge pile foundations submerged in water. In addition to the fluid-structure interaction (FSI), the soil-structure interaction (SSI) can play an important role in the seismic responses of bridges [6][7][8][9][10]. Consequently, it is important to evaluate the seismic responses of cross-sea bridges considering SSI.…”

Section: Introductionmentioning

confidence: 99%

Seismic Fragility Analysis of Bridge Group Pile Foundations considering Fluid-Pile-Soil Interaction

Zhang

Wang

2020

Shock and Vibration

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The cross-sea bridges play an important role to promote the development of regional economy. These bridges located in earthquake-prone areas may be subjected to severe earthquakes during their lifetime. Group pile foundations have been widely used in cross-sea bridges due to their structural efficiency, ease of construction, and low cost. This paper investigates the seismic performance of bridge pile foundation based on the seismic fragility analysis. Based on the analysis platform OpenSees, the three-dimensional finite model of the bridge pile foundation is developed, where the pile-water interaction is replaced by the added mass method, nonlinear p-y, t-z, and q-z elements are used to simulate pile-soil interaction, and the displacement of the surface ground motion due to seismic excitations is applied on all spring supports. The seismic fragility curves of the bridge pile foundation are generated by using the earthquake records recommended by FEMA P695 as input motions. The curvature ductility based fragility curves are obtained using seismic responses for different peak ground accelerations. The effects of pile-water interaction, soil conditions, and different types of ground motions on the bridge pier fragilities are studied and discussed. Seismic fragility of the pier-group pile system shows that Sec C (the bottom section of the pier) is the most vulnerable section in the example fluid-structure-soil interaction (FSSI) system for all four damage LSs. The seismic responses of Sec E (a pile section located at the interface of the soil layer and water layer) are much lower than other sections. The parameter analysis shows that pile-water interaction has slight influence (less than 5%) on the fragility curves of the bridge pier. For the bridge group pile foundations considering the fluid-pile-soil interaction, PNF may induce larger seismic response than far-field (FF) and no-pulse near field (NNF). The bridge pile foundation in stiff soil is most vulnerable to seismic damage than soft condition.

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“…Omrani et al [24] proposed a probabilistic framework to achieve the sensitivity of the seismic performance of a typical reinforced concrete overpass bridge to variations in the parameters of its abutment model. Han et al [25] studied the seismic behavior of a reinforced concrete single-tower cable-stayed bridge equipped with sliding friction bearings under 2-D seismic excitations. Based on the OpenSees platform, a three-dimensional numerical model was established, and the nonlinear seismic response and seismic performance of the single-tower cable-stayed bridge were systematically studied.…”

Section: Introductionmentioning

confidence: 99%

Simulation of the In Situ Spatially Varying Ground Motions and Nonlinear Seismic Response Analysis of the Cable-Stayed Bridge

Jin

Chen

et al. 2020

Shock and Vibration

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To study the nonlinear seismic behavior and seismic resistance of the long-span cable-stayed bridges subjected to earthquakes, the multidimensional and multisupported artificial ground motions are synthesized first based on the in situ site conditions of the bridge considering the coherent and traveling wave effects. Then, considering the material nonlinearity of the cable-stayed bridge, a 3D finite element model is established based on the OpenSees platform, and the nonlinear seismic response analysis of the bridge is carried out under the synthetic artificial ground motions. The nonlinear seismic response of main bridge components such as piers, towers, bearings, and cables is analyzed, and key conclusions and observations are drawn.

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Nonlinear seismic response of a base isolated single pylon cable-stayed bridge

Cited by 19 publications

References 33 publications

Collapse prognosis of a long‐span cable‐stayed bridge based on shake table test and nonlinear model updating

Collapse prognosis of a long‐span cable‐stayed bridge based on shake table test and nonlinear model updating

Seismic Fragility Analysis of Bridge Group Pile Foundations considering Fluid-Pile-Soil Interaction

Simulation of the In Situ Spatially Varying Ground Motions and Nonlinear Seismic Response Analysis of the Cable-Stayed Bridge

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