Impact on Railway Bridges
Author: Charles Thomas George Looney
Publisher:
Published: 1944
Total Pages: 140
ISBN-13:
DOWNLOAD EBOOKRead and Download eBook Full
Author: Charles Thomas George Looney
Publisher:
Published: 1944
Total Pages: 140
ISBN-13:
DOWNLOAD EBOOKAuthor: Charles Thomas George Looney
Publisher:
Published: 1944
Total Pages: 136
ISBN-13:
DOWNLOAD EBOOKAuthor: Yeong-Bin Yang
Publisher: World Scientific
Published: 2004
Total Pages: 565
ISBN-13: 9812388478
DOWNLOAD EBOOKThe commercial operation of the bullet train in 1964 in Japan marked the beginning of a new era for high-speed railways. Because of the huge amount of kinetic energy carried at high speeds, a train may interact significantly with the bridge and even resonate with it under certain circumstances. Equally important is the riding comfort of the train cars, which relates closely to the maneuverability of the train during its passage over the bridge at high speeds.This book is unique in that it is devoted entirely to the interaction between the supporting bridges and moving trains, the so-called vehicle-bridge interaction (VBI). Finite element procedures have been developed to treat interaction problems of various complexities, while the analytical solutions established for some typical problems are helpful for identifying the key parameters involved. Besides, some field tests were conducted to verify the theories established.This book provides an up-to-date coverage of research conducted on various aspects of the VBI problems. Using the series of VBI elements derived, the authors study a number of frontier problems, including the impact response of bridges with elastic bearings, the dynamic response of curved beam to moving centrifugal forces, the stability and derailment of trains moving over bridges shaken by earthquakes, the impact response of two trains crossing on a bridge, the steady-state response of trains moving over elevated bridges, and so on.
Author: George Erle Beggs
Publisher:
Published: 1916
Total Pages: 156
ISBN-13:
DOWNLOAD EBOOKAuthor: J. Graham
Publisher:
Published: 1903
Total Pages: 12
ISBN-13:
DOWNLOAD EBOOKAuthor: Great Britain. Ministry of Transport. Advisory Committee
Publisher:
Published: 1921
Total Pages: 116
ISBN-13:
DOWNLOAD EBOOKAuthor: Ladislav Frýba
Publisher: Thomas Telford Publishing
Published: 1996
Total Pages: 340
ISBN-13:
DOWNLOAD EBOOKProvides a survey of the dynamic stresses in railway bridges under moving vehicles. This book investigates both bridge and moving railway vehicles and describes the effect of parameters, such as the speed of vehicles, track irregularities, on the dynamic behaviour of bridges, and is useful for civil and railway engineers and researchers.
Author: Mehrdad Bisadi
Publisher:
Published: 2019
Total Pages: 384
ISBN-13:
DOWNLOAD EBOOKThe Dynamic Impact Factor (DIF) is widely employed to account for the dynamic amplification effect of moving trains on railway bridges. An accurate DIF provides a safe yet economical basis for new railway bridges and improves the safety rating assessment for existing railway bridges. This thesis investigates the accuracy, reliability and the underlying influence factors for DIF relationships currently used for short span steel railway bridges. Full-scale field monitoring exercises are conducted to measure the dynamic responses of two railway bridges during various train passages. The monitoring results indicate that both railway bridges satisfy the live load deflection limits recommended for railway bridges subjected to low-speed trains. Three-dimensional Finite Element (FE) models are developed for the each of railway bridges. The models are verified against the monitoring results. The verification results show that the models accurately predict the actual dynamic response of the railway bridges. A series of sensitivity analysis is performed using the verified FE models. The analyses investigate the effects of variation in New Zealand train and bridge dynamic characteristics on the mid-span DIFs of the monitored railway bridges. The trains are simulated as moving constant forces. The analysis results show that the train speeds have the largest influence on the DIFs of the railway bridges. Numbers and axle distances of carriages have some effects on the DIFs which these effects depend on corresponding locomotive axle distances. Bridge damping ratios have some influences, and the train axle loads have no effect on the DIFs. Over 100 different train arrangements corresponding to combinations possible in New Zealand are simulated and applied to the each of the FE modes. The mid-span DIFs are evaluated numerically as the simulated train passes over the bridges with different speeds. It is found that the DIF formulas in New Zealand railway bridge guidelines overestimate the dynamic effects of moving trains on the railway bridges. This overestimation approaches 4.2 times the bridge evaluated DIFs. Data mining techniques are employed to generate predictive models which estimate the medians of the simulated DIFs. These predictive models provide users with a reliable prediction of the DIFs for designing or assessing the short span steel railway bridges subjected to train passages with speeds up to 150 km/h.
Author: Yeong-Bin Yang
Publisher: World Scientific
Published: 2004
Total Pages: 565
ISBN-13: 9812567178
DOWNLOAD EBOOKThe commercial operation of the bullet train in 1964 in Japan markedthe beginning of a new era for high-speed railways. Because of thehuge amount of kinetic energy carried at high speeds, a train mayinteract significantly with the bridge and even resonate with it undercertain circumstances. Equally important is the riding comfort of thetrain cars, which relates closely to the maneuverability of the trainduring its passage over the bridge at high speeds.
Author: He Xia
Publisher: Springer
Published: 2017-10-27
Total Pages: 590
ISBN-13: 3662548712
DOWNLOAD EBOOKThis book presents both the fundamental theory and numerical calculations and field experiments used in a range of practical engineering projects. It not only provides theoretical formulations and various solutions, but also offers concrete methods to extend the life of existing bridge structures and presents a guide to the rational design of new bridges, such as high-speed railway bridges and long-span bridges. Further, it offers a reference resource for solving vehicle–structure dynamic interaction problems in the research on and design of all types of highways, railways and other transport structures.