Seismic response study on a multi-span cable-stayed bridge scale model under multi-support excitations. Part II: numerical analysis

Zhou, Rui; Zong, Zhouhong; Huang, Xingyi; Xia, Zhanghua

doi:10.1631/jzus.a1300340

Cited by 18 publications

(6 citation statements)

References 16 publications

(14 reference statements)

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“…Therefore, specialised analyses based on advanced numerical methods are needed for performance evaluation and collapse simulation of these bridges. There are some studies on the collapse progress simulation of long‐span cable‐stayed bridges 5,8,15–17 . Lin et al 5 adopted multi‐layered shell elements to account for the failure process of the beam‐column conjunction of a bridge pylon.…”

Section: Introductionmentioning

confidence: 99%

“…Duan et al 15 adopted the vector form intrinsic FE (VFIFE) method and simulated the collapse process of a 2D cable‐stayed bridge modelled with planar fibre beam‐column elements and truss elements. Zhou et al 16 compared the failure process of a multi‐span cable‐stayed bridge under two different ground motions using LS‐DYNA. Domaneschi et al 17 built the FE model of a cable‐stayed bridge with a main span of 260 m and simulated the disproportionate collapse of the bridge based on the applied element method.…”

Section: Introductionmentioning

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%

Section: Introductionmentioning

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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“…They stated that seismic demand of the large‐scale bridge structures should be determined under spatially varying ground motion rather than under uniform earthquake excitation. Zong et al 5 and Zhou et al 6 performed two detailed studies directly related to each other. They depicted that traveling wave effects (wave passage) mainly affected seismic performance of the main girder and tower elements through a shake table test of a scaled three‐tower cable‐stayed bridge.…”

Section: Introductionmentioning

confidence: 99%

Hanger replacement influence on seismic response of suspension bridges: Implementation to the Bosphorus Bridge subjected to multi‐support excitation

Baş

Dong

Apaydın³

et al. 2020

Earthq Engng Struct Dyn

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The effects of hanger replacement from inclined to vertical configuration on seismic response of long-span suspension bridges are investigated considering multi-support earthquake excitation. The Bosphorus Bridge is investigated due to its recent comprehensive rehabilitation, mainly involving hanger replacement. The finite-fault stochastic simulation method (FINSIM) is utilized for multi-point earthquake time-history generation. The developed finite element (FE) model both for the inclined and vertical hanger arrangement are verified through the structural health monitoring (SHM) data. Based on the comparative analysis, the tension force of vertical hangers is found to be lower than that of inclined hangers, whereas the tension force of the main and back-stay cables remains the same. The compressive axial force of the deck decreases relatively in the case of the vertical hanger arrangement, whereas the crosssectional forces at the tower base section increase. The approach viaducts are not affected by the vertical hanger arrangement. According to the demand/capacity ratios for damage estimation under the max. earthquake (2475 years return period), structural damage on the tower base section may be expected for both hanger arrangements, while these sections perform well under design scenario earthquake. The expansion joint of the bridge with inclined hangers is also estimated to be damaged; however, this displacement is lower in the case of the vertical hanger arrangement due to the viscous dampers. The findings also reveal that a change in hanger form of a suspension bridge can necessitate other structural retrofit, such as using viscous dampers to limit longitudinal displacements of the deck and retrofitting the bridge towers.

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“…This study provided a foundation for seismic damage prediction and anticollapse seismic design for cable-stayed bridges. Zong et al [29] and Zhou et al [30] in order to study the seismic characteristics of cable-stayed bridge with single tower show that a 1 : 30 scaled model of a semifloating composite cable-stayed bridge was designed and tested on the shaking tables under multisupport excitations with different strong earthquake waves. An implicit integration finite element model and an explicit integration finite element model were established to simulate the seismic responses and failure modes of a cable-stayed bridge model with single tower in shaking table tests.…”

Section: Introductionmentioning

confidence: 99%

Research on Collapse Process of Cable-Stayed Bridges under Strong Seismic Excitations

Wang¹,

Zhu²,

Cui³

2017

Shock and Vibration

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In order to present the collapse process and failure mechanism of long-span cable-stayed bridges under strong seismic excitations, a rail-cum-road steel truss cable-stayed bridge was selected as engineering background, the collapse failure numerical model of the cable-stayed bridge was established based on the explicit dynamic finite element method (FEM), and the whole collapse process of the cable-stayed bridge was analyzed and studied with three different seismic waves acted in the horizontal longitudinal direction, respectively. It can be found from the numerical simulation analysis that the whole collapse failure process and failure modes of the cable-stayed bridge under three different seismic waves are similar. Furthermore, the piers and the main pylons are critical components contributing to the collapse of the cable-stayed bridge structure. However, the cables and the main girder are damaged owing to the failure of piers and main pylons during the whole structure collapse process, so the failure of cable and main girder components is not the main reason for the collapse of cable-stayed bridge. The analysis results can provide theoretical basis for collapse resistance design and the determination of critical damage components of long-span highway and railway cable-stayed bridges in the research of seismic vulnerability analysis.

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Seismic response study on a multi-span cable-stayed bridge scale model under multi-support excitations. Part II: numerical analysis

Cited by 18 publications

References 16 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

Hanger replacement influence on seismic response of suspension bridges: Implementation to the Bosphorus Bridge subjected to multi‐support excitation

Research on Collapse Process of Cable-Stayed Bridges under Strong Seismic Excitations

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