Integral Bridge for High-Speed Railway

Rodríguez, Javier; Martínez, Francisco; Marti, Joaquin

doi:10.2749/101686611x13049248219881

Cited by 7 publications

(4 citation statements)

References 6 publications

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“…Continuous bridges offer a lower vibration response and therefore a better dynamic performance than simply supported bridges (Goicolea, 2008). Integral bridges are found to be suitable for spans of up to 60 m for HSR (Rodriguez et al, 2011). The continuity of the rail over joints is often ignored for dynamic analysis due to the relatively low rail stiffness compared to the bridge (Majka and Hartnett, 2009).…”

Section: Longitudinal Continuity and Articulationmentioning

confidence: 99%

Modelling traffic action in high-speed railway bridges

Pring

Ruiz-Teran

2020

Proceedings of the Institution of Civil Engineers - Bridge Engi

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There are a significant variety of approaches taken by researchers when considering the response due to traffic in high speed railway (HSR) bridges. This paper will focus on the comparison between methods employed by different authors for the structural models developed for the bridge, the load models for the high-speed trains, and the interaction between the train vehicles and the bridge. The structural bridge models range from simple beam models to complex 3D solid models, with important implications in terms of the ability of the models to predict realistic responses, as well as in terms of the appropriateness for design purposes considering the computational requirements. The load models vary from simple moving loads to a full vehicle moving system (with its own masses, stiffness, dampers, and contacts). For the latter approach, the interaction between the vehicle and the bridge becomes important. The major models in literature are identified and compared herein. The aim of this paper is to compile these different approaches and compare the different available methods, in order to enable a clearer judgement when setting the corresponding models for design purposes, as well as to provide a deeper understanding about some of the key definitions within the HSR bridge models.

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Section: Longitudinal Continuity and Articulationmentioning

confidence: 99%

Modelling traffic action in high-speed railway bridges

Pring

Ruiz-Teran

2020

Proceedings of the Institution of Civil Engineers - Bridge Engi

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“…Concretely, a real steel–concrete composite integral footbridge has been considered to conduct the parameter identification of the dynamic Winkler model. The selection of this structural type is based on the high influence of the SSI phenomenon on the dynamic behaviour of integral bridges (Rodriguez et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Parameter identification of the dynamic Winkler soil–structure interaction model using a hybrid unscented Kalman filter–multi-objective harmony search algorithm

Naranjo-Pérez

Jiménez‐Alonso

Sáez

2020

Advances in Structural Engineering

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Soil–structure interaction is a key aspect to take into account when simulating the response of civil engineering structures subjected to dynamic actions. To this end, and due to its simplicity and ease of implementation, the dynamic Winkler model has been widely used in practical engineering applications. In this model, soil–structure interaction is simulated by means of spring–damper elements. A crucial point to guarantee the adequate performance of the approach is to accurately estimate the constitutive parameters of these elements. To this aim, this article proposes the application of a recently developed parameter identification method to address such problem. In essence, the parameter identification problem is transformed into an optimization problem, so that the parameters of the dynamic Winkler model are estimated by minimizing the relative differences between the numerical and experimental modal properties of the overall soil–structure system. A recent and efficient hybrid algorithm, based on the combination of the unscented Kalman filter and multi-objective harmony search algorithms, is satisfactorily implemented to solve the optimization problem. The performance of this proposal is then validated via its implementation in a real case-study involving an integral footbridge.

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“…Rodriguez, et al (2011) made a conclusion that integral bridges display a very good response during earthquakes, particularly in the longitudinal direction. Plastic yielding and other non linearities tend to reduce progressively the effects of any differences caused by pre-existing displacements.…”

Section: Background Of Researchmentioning

confidence: 99%

“…Behaviour of integral bridges under earthquake loading has already been studied by many scholars. Rodriguez, et al (2011) stated that for an earthquake in the transverse direction, the central piers of an integral bridge tend to carry greater portions of the global load, but the fact remains that all piers and the two abutments contribute to transmitting the inertial load to the ground, avoiding the hard points and stress concentrations of conventional bridges.…”

Section: Background Of Researchmentioning

confidence: 99%

Behaviour of integral bridges under vertical and horizontal earthquake ground motion

Masrilayanti¹,

Weekes²

2014

Bridge Maintenance, Safety, Management and Life Extension

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Integral bridges are monolithic and are known to possess good earthquake resistance when founded on a stable soil. One important consideration is the relative displacements which can occur at the support points on structures where there is significant spacing between, i.e. bridges. Factors such as soil, foundation types etc. can all influence the dynamic response, and the stiffness of the bridge can influence how relative displacements affect the internal force actions within the structure. In this study, the effect of earthquakes on integral bridges built on several different soil types is examined, through computer simulation of an integral abutment bridge. The study is made based on Eurocode 8 recommendations, which provides data for different types of soil to be used for earthquake analysis. A symmetrical medium length integral bridge obtained from an existing structure is used for the analysis. Artificial EC8 spectrum compatible time histories (with a 0.35 g peak ground acceleration) are applied to the structure for a range of soil stiffnesses. In conjunction with this, both static and dynamic relative displacement studies are carried out to develop insight as to the significance or dominance of either dynamic or relative displacement effects.The final aim of this study is to propose a simplified approach for design/appraisal which can allow predictions of dynamic response based on the results of static relative displacement studies coupled with simple computer models, without having to resort to full nonlinear integration time-history analysis. Synthetic time histories for 5 different types of soil were created using Mathcad. The synthetic acceleration time history was validated using Seismospect (by Seismosoft). The time histories were then used to carry our full integration time history analyses in ANSYS (engineering simulation software) to simulate the dynamic response of the bridge.The results show that relative displacements play an important role in overall structural response of the integral bridge, compared to the pure dynamic response. The results also confirm that lower stiffness soils suffer a more detrimental effect of the earthquake compared to a soil of higher stiffness.

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Integral Bridge for High-Speed Railway

Cited by 7 publications

References 6 publications

Modelling traffic action in high-speed railway bridges

Modelling traffic action in high-speed railway bridges

Parameter identification of the dynamic Winkler soil–structure interaction model using a hybrid unscented Kalman filter–multi-objective harmony search algorithm

Behaviour of integral bridges under vertical and horizontal earthquake ground motion

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