Seismic assessment of a cable-stayed arch bridge under three-component orthotropic earthquake excitation

Farahmand‐Tabar, Salar; Barghian, Majid

doi:10.1177/1369433220948756

Cited by 22 publications

(8 citation statements)

References 36 publications

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“…9. For further explanation, refer to the comprehensive seismic assessment of the cable-arch bridge investigated by Farahmand-Tabar and Bargian [45].…”

Section: Earthquake Excitationmentioning

confidence: 99%

Formulating the optimum parameters of modified hanger system in the cable-arch bridge to restrain force fluctuation and overstressing problems

Farahmand‐Tabar

Barghian

2020

J Braz. Soc. Mech. Sci. Eng.

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Inclined hangers behave better than vertical ones under lateral loads (i.e., wind or earthquake) despite they are prone to fatigue phenomenon. In some instances, the slackness problem is seen in some inclined hangers, while others may become overstressed. By considering the modified hanger system, the disadvantages of vertical and inclined systems are resolved, while keeping their advantages. The objective of this study is to propose formulations for the optimum application of novel arrangement of hangers in a cable-arch bridge to suppress problems such as overstressing, force fluctuation, and decreasing the probability of fatigue phenomenon in hangers. To define optimum parameters, the modified hanger system was analyzed and compared with vertical and inclined ones considering nonlinear static analysis under dead load as an initial state plus seismic excitation and dynamic impact load of vehicles. Results indicate that the modified hanger system is improved remarkably in comparison with the inclined and vertical hanger systems.

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“…9. For further explanation, refer to the comprehensive seismic assessment of the cable-arch bridge investigated by Farahmand-Tabar and Bargian [45].…”

Section: Earthquake Excitationmentioning

confidence: 99%

Formulating the optimum parameters of modified hanger system in the cable-arch bridge to restrain force fluctuation and overstressing problems

Farahmand‐Tabar

Barghian

2020

J Braz. Soc. Mech. Sci. Eng.

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“…Zhang et al [10] studied the spatial response of long-span deck railway steel truss arch bridge under multidimensional seismic excitation. Farahmand-Tabar and Barghian [11] conducted three-component orthotropic seismic excitation analysis on the hybrid beam of a long-span concrete-flled steel tubular arch bridge and a cable-stayed bridge. Huang et al [12] performed an experimental study on the seismic performance of a concrete-flled steel tubular arch bridge using multiple shaking table excitation.…”

Section: Introductionmentioning

confidence: 99%

Seismic Response Analysis of Multidimensional and Multiangle Long‐Span Top‐Supported CFST Arch Bridge

Wang

Fan

et al. 2022

Advances in Civil Engineering

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Taking a concrete-filled steel tube (CFST) arch bridge with a clear span of 400 m as an example, the in-depth analysis of its natural vibration characteristics is carried out by establishing a finite element model. Then, the three-dimensional El Centro recorded wave after amplitude modulation is taken as the excitation wave; the structural response under three kinds of single dimension and four kinds of multidimensional combined excitation and 0∼90° transformation X(longitudinal) + Y(transverse) orthogonal combined excitation is evaluated. The results show that the structure of long-span top-supported arch bridge extends in the longitudinal and vertical dimensions at the same time, and the mode shape density and mass distribution have multidirection and multiangle coupling. With the increase of excitation dimensions, the value and relative ratio of chord axial force increase. The maximum axial force ratio of X + Y to X and Y is 2.1, the maximum axial force ratio of X + Y + Z (longitudinal) to X + Y, X + Z, and Y + Z is 1.4, 1.8, and 1.8; the displacement in X and Y direction under combined excitation is independent and the displacement in Z direction is its coupling term, but the displacement under X + Y + Z combined excitation is only 10% larger than that under X + Z and Y + Z combined excitation. Under the combined excitation of X + Y with a changing angle of 0°∼90°, the axial force variation of the chord at different positions and on the same section of the arch rib has spatial characteristics. The variation range of upper and lower rod axial force varies from 0.63 to 1.35 and from 0.81 to 1.51, respectively, the change trend of displacement in the X and Y directions is relatively consistent, the change of displacement in the Z direction is asynchronous, and the displacement of vault section increases by one time. The seismic response of this bridge type under multidimensional and multiangle excitation shows obvious superposition.

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“…To prevent such undesirable phenomena, plenty of scholars have made indispensable contributions to cable dynamics. Results show that the flexible cable parametrically resonated by excitations may result in instability or even damage of the bridge [2][3][4][5], which show greater destructiveness than that caused by the primary resonance [6,7]. Dynamic analysis and design of parametrically excited cables are significant in the construction and application of the bridge [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Modal Interaction-Induced Parametric Resonance of Stayed Cable: A Combined Theoretical and Experimental Investigation

Zhang

Cui

Zhi

et al. 2021

Mathematical Problems in Engineering

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The cable-stayed bridge is widely used due to its strong spanning capacity and navigability. However, flexible cables parametrically resonated by external excitation may result in instability or even damage to the bridge. To prevent such undesirable resonance, this paper discusses an in-plane modal interaction-induced parametric resonance of the stayed cable excited by the bridge deck vibration via nonlinear dynamic analysis. Based on the nonlinear distributed model, two modal governing equations of the cable are established via the Galerkin method. A certain working condition, when the external excitation frequency is close to the second-order natural frequency of the stay cable while nearly twice the first-order natural frequency, is theoretically and experimentally investigated. Specifically, the frequency response equations are obtained by the multiscale method, and the stability of solutions is examined through the Routh Hurwitz criterion. Theoretical and experimental results show that bridge deck vibration can induce not only the primary and superharmonic resonance of the cable but also the principal parametric resonance. Parametric resonance-induced bifurcations are also observed in the system. Particularly, the energy exchange from second-order primary resonance to first-order principal parametric resonance is found, which can induce the parametric resonance with the response amplitude one to three times higher than that of the primary resonance. This paper also validates the superiority of the present modal interaction model over the traditional single-mode model in practical engineering applications.

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Seismic assessment of a cable-stayed arch bridge under three-component orthotropic earthquake excitation

Cited by 22 publications

References 36 publications

Formulating the optimum parameters of modified hanger system in the cable-arch bridge to restrain force fluctuation and overstressing problems

Formulating the optimum parameters of modified hanger system in the cable-arch bridge to restrain force fluctuation and overstressing problems

Seismic Response Analysis of Multidimensional and Multiangle Long‐Span Top‐Supported CFST Arch Bridge

Modal Interaction-Induced Parametric Resonance of Stayed Cable: A Combined Theoretical and Experimental Investigation

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