Seismic responses of a highway viaduct considering vehicles of design live load as dynamic system during moderate earthquakes

Kim, C. W.; Kawatani, Mitsuo; Konaka, Shimpei; Kitaura, R.

doi:10.1080/15732479.2010.493339

Cited by 31 publications

(26 citation statements)

References 17 publications

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“…On the contrary, the seismic response of the bridge was amplified when the vehicles were treated as additional vertical masses. The conclusions of the more recent similar study of He et al , are in agreement with those of . Tanabe et al , studied numerically the behavior of the Shinkansen trains and railway bridges during earthquakes and checked experimentally part of their results.…”

Section: Introductionsupporting

confidence: 77%

“…That study also stressed the importance of the vertical ground motion component on the stability of the vehicle. Kim et al studied the seismic response of interacting vehicle–bridge systems under moderate earthquakes, for steel monorail bridges , and for highway viaducts . They showed that it is not realistic to treat the train vehicle merely as additional mass, as suggested by most seismic codes worldwide, for example, .…”

Section: Introductionmentioning

confidence: 99%

“…They showed that it is not realistic to treat the train vehicle merely as additional mass, as suggested by most seismic codes worldwide, for example, . The seismic response of the bridge was reduced when the dynamics of the vehicles were properly simulated. On the contrary, the seismic response of the bridge was amplified when the vehicles were treated as additional vertical masses.…”

Section: Introductionmentioning

confidence: 99%

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Seismic response analysis of an interacting curved bridge–train system under frequent earthquakes

Zeng

Dimitrakopoulos

2016

Earthq Engng Struct Dyn

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Summary This paper establishes a scheme for the seismic analysis of interacting vehicle–bridge systems. The focus is on (horizontally) curved continuous railway bridges and frequent earthquakes. Main features of the proposed scheme are (i) the treatment of the dynamics in all three dimensions (3D), employing an additional rotating system of reference to describe the dynamics of the vehicles and a realistic 3D bridge model; (ii) the simulation of the creep interaction forces generated by the rolling contact between the wheel and the rail; and (iii) the integration of the proposed scheme with powerful commercial finite element software, during the pre‐processing and post‐processing phases of the analysis. The study brings forward the dynamics of a realistic vehicle–bridge (interacting) system during seismic shaking. For the (vehicle–bridge) case examined, the results verify the favorable damping effect the running vehicles have on the vibration of the deck. By contrast, the study stresses the adverse influence of the earthquake‐induced bridge vibration on the riding comfort but, more importantly, on the safety of the running vehicles. In this context, the paper unveils also a vehicle–bridge–earthquake timing problem, behind the most critical vehicle response, and underlines the need for a probabilistic treatment. Among the 20 sets of historic records examined, the most crucial for the safety of the vehicles are near‐fault ground motions. Finally, the study shows that even frequent earthquakes, of moderate intensity, can threaten the safety of vehicles running on bridges during the ground motion excitation, in accordance with recorded accidents. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Introductionsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Seismic response analysis of an interacting curved bridge–train system under frequent earthquakes

Zeng

Dimitrakopoulos

2016

Earthq Engng Struct Dyn

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“…Several studies (Kim and Kawatani 2006;Kim et al 2011;He et al 2011) verified that the seismic response of the bridge is reduced when the dynamics of the vehicles are properly simulated, whereas it is amplified when the vehicles are treated as additional vertical masses. Yang and Wu (2002) investigated the stability of train vehicles, stationary or moving, on bridges shaken by earthquakes.…”

Section: Introductionmentioning

confidence: 96%

Dynamic vehicle–bridge interaction under simultaneous vertical earthquake excitation

Paraskeva

Dimitrakopoulos

Zeng

2016

Bull Earthquake Eng

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Traditionally, the seismic response analysis of a bridge does not account for the concurrent vehicle-bridge dynamic interaction. However, the behavior of a seismically excited bridge can jeopardize the safety of the vehicles running on it, even if the bridge itself remains undamaged. This study examines the seismic response of a vehicle-bridge interacting (VBI) system under vertical earthquake excitation, modelling the truck vehicles as rigid body assemblies. An application of the proposed scheme to a realistic case of (highway) bridge-(truck) vehicles shows that the earthquake ground motion and the road surface conditions are the main sources of excitation. The results show that the road surface conditions influence strongly the dynamics of the VBI system, even when the vertical component of the earthquake excitation is significant. Also, the study brings forward the influence of traffic parameters (namely the speed, the number and the distance between the running vehicles) and underlines the need to consider different positions of the vehicle/s (on the deck) during the earthquake shaking. Finally, it examines the tendency of the wheels of a truck vehicle to detach (jump) from the deck during the seismic response of the VBI system. Detachment tends to be more frequent as the road surface conditions deteriorate and/or the peak ground acceleration increases. However, detachment is a complicated phenomenon which depends also on many other ground motion and VBI system parameters and deserves further study.

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“…The observations from the numerical analysis demonstrated that heavy vehicles, acting as dynamic system, can reduce the seismic response of bridges under a ground motion with low frequency characteristics, but the vehicles have the opposite effect and slightly amplify the seismic response of the bridge under high frequency ground motion. A recent study on the effects of live load on a highway bridge under a moderate earthquake in the horizontal and vertical directions is reported by Kim et al [2011]. The study concluded that the seismic response of the bridge is amplified when the vehicle is considered as merely additional gravity load or mass and the amplification is dependent on the relationship between the fundamental frequency of the bridge and the response spectrum of the ground motion.…”

Section: Introductionmentioning

confidence: 99%

Seismic Behavior of Steel Monorail Bridges Under Train Load During Strong Earthquakes

Kim

Kawatani

Kanbara³

et al. 2013

J. Earthquake and Tsunami

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This paper investigated dynamic responses of steel monorail bridges incorporating train-bridge interaction under strong earthquakes. Two types of steel monorail bridges were considered in the study: a conventional type with steel track-girder; an advanced type with composite track-girder and simplified lateral bracing system. During strong earthquakes, monorail train was assumed standing on the track-girder of monorail bridges. Observations through the analytical study showed that considering the monorail train as additional mass rather than a dynamic system in numerical modeling overestimated effect of the train load on seismic performance of monorail bridges. Earlier plastic deformations at the end bracing of the girder system absorbed seismic energy and reduced the stress at the pier base.

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Seismic responses of a highway viaduct considering vehicles of design live load as dynamic system during moderate earthquakes

Cited by 31 publications

References 17 publications

Seismic response analysis of an interacting curved bridge–train system under frequent earthquakes

Seismic response analysis of an interacting curved bridge–train system under frequent earthquakes

Dynamic vehicle–bridge interaction under simultaneous vertical earthquake excitation

Seismic Behavior of Steel Monorail Bridges Under Train Load During Strong Earthquakes

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