首页|A discussion about the limitations of the Eurocode's high-speed load model for railway bridges

A discussion about the limitations of the Eurocode's high-speed load model for railway bridges

扫码查看
原文链接
  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
High-speed railway bridges are subjected to normative limitations concerning maximum permissible deck accelerations.For the design of these structures,the European norm EN 1991-2 introduces the high-speed load model(HSLM)—a set of point loads intended to include the effects of existing high-speed trains.Yet,the evolution of current trains and the recent development of new load models motivate a discussion regarding the limits of validity of the HSLM.For this study,a large number of randomly generated load models of articulated,conventional,and regular trains are tested and compared with the envelope of HSLM effects.For each type of train,two sets of 100,000 load models are considered:one abiding by the limits of the EN 1991-2 and another considering wider limits.This comparison is achieved using both a bridge-independent metric(train signatures)and dynamic analyses on a case study bridge(the Canelas bridge of the Portuguese Railway Network).For the latter,a methodology to decrease the computational cost of moving loads analysis is introduced.Results show that some theoretical load models constructed within the stipulated limits of the norm can lead to effects not covered by the HSLM.This is especially noted in conventional trains,where there is a relation with larger distances between centres of adjacent vehicle bogies.

High-speed load modelDynamic analysisHigh-speed railwaysTrain signatureRailway bridgesDeck acceleration

Gon?alo Ferreira、Pedro Montenegro、José Rui Pinto、António Abel Henriques、Rui Cal?ada

展开 >

CONSTRUCT-LESE,Faculty of Engineering,University of Porto,Rua Dr.Roberto Frias,4200-465 Porto,Portugal

CONSTRUCT-LABEST,Faculty of Engineering,University of Porto,Rua Dr.Roberto Frias,4200-465 Porto,Portugal

Portuguese Foundation for Science and Technology(FCT)through the PhD scholarshipof the Base Funding—UIDB/04708/2020 of the CONSTRUCT—Instituto de I&D em Estruturas e Constru??es—funded by national funds throu

PD/BD/143007/2018

2024

10.1007/s40534-023-00321-5

铁道工程科学(英文)
西南交通大学

铁道工程科学(英文)

影响因子：0.403
ISSN：2662-4745
年,卷(期)：2024.32(2)
  • 29