A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Dynamic Testing on Railway Bridges
https://orcid.org/http://orcid.org/0000-0001-8624-9904
https://orcid.org/http://orcid.org/0000-0003-2304-6127
https://orcid.org/http://orcid.org/0000-0002-2375-7685
This chapter describes a set of dynamic tests that are frequently performed in railway bridges during their lifecycle, particularly in the construction, reception, and operation phases. Typically, the dynamic testing of railway bridges involves ambient vibration and free vibrations tests, as well as dynamic tests under the passage of traffic loads. In this scope, the typical framework of the dynamic monitoring system is described, particularly in what concerns the sensor types, data acquisition systems (DAQs), communication protocols and data processing. A special emphasis is given to the data processing techniques which are dedicated to each type of dynamic testing. In case of ambient vibration tests a frequency domain method (EFDD—Enhanced Frequency Domain Decomposition) and a time domain method (SSI—Stochastic Subspace Identification) are detailed. In case of free vibration tests the Logarithm Decrement (LD) and Prony methods are described. For the dynamic test under traffic loads some specific features involving Power Spectrum Density (PSD) functions and train dynamic signatures are used. Additionally, the dynamic tests performed in the Cascalheira bridge, located in the northern line of the Portuguese railway network, are presented as a case study.
Dynamic Testing on Railway Bridges
https://orcid.org/http://orcid.org/0000-0001-8624-9904
https://orcid.org/http://orcid.org/0000-0003-2304-6127
https://orcid.org/http://orcid.org/0000-0002-2375-7685
This chapter describes a set of dynamic tests that are frequently performed in railway bridges during their lifecycle, particularly in the construction, reception, and operation phases. Typically, the dynamic testing of railway bridges involves ambient vibration and free vibrations tests, as well as dynamic tests under the passage of traffic loads. In this scope, the typical framework of the dynamic monitoring system is described, particularly in what concerns the sensor types, data acquisition systems (DAQs), communication protocols and data processing. A special emphasis is given to the data processing techniques which are dedicated to each type of dynamic testing. In case of ambient vibration tests a frequency domain method (EFDD—Enhanced Frequency Domain Decomposition) and a time domain method (SSI—Stochastic Subspace Identification) are detailed. In case of free vibration tests the Logarithm Decrement (LD) and Prony methods are described. For the dynamic test under traffic loads some specific features involving Power Spectrum Density (PSD) functions and train dynamic signatures are used. Additionally, the dynamic tests performed in the Cascalheira bridge, located in the northern line of the Portuguese railway network, are presented as a case study.
Dynamic Testing on Railway Bridges
https://orcid.org/http://orcid.org/0000-0001-8624-9904
https://orcid.org/http://orcid.org/0000-0003-2304-6127
https://orcid.org/http://orcid.org/0000-0002-2375-7685
This chapter describes a set of dynamic tests that are frequently performed in railway bridges during their lifecycle, particularly in the construction, reception, and operation phases. Typically, the dynamic testing of railway bridges involves ambient vibration and free vibrations tests, as well as dynamic tests under the passage of traffic loads. In this scope, the typical framework of the dynamic monitoring system is described, particularly in what concerns the sensor types, data acquisition systems (DAQs), communication protocols and data processing. A special emphasis is given to the data processing techniques which are dedicated to each type of dynamic testing. In case of ambient vibration tests a frequency domain method (EFDD—Enhanced Frequency Domain Decomposition) and a time domain method (SSI—Stochastic Subspace Identification) are detailed. In case of free vibration tests the Logarithm Decrement (LD) and Prony methods are described. For the dynamic test under traffic loads some specific features involving Power Spectrum Density (PSD) functions and train dynamic signatures are used. Additionally, the dynamic tests performed in the Cascalheira bridge, located in the northern line of the Portuguese railway network, are presented as a case study.
Dynamic Testing on Railway Bridges
Springer Tracts in Civil Engineering
Chastre, Carlos (editor) / Neves, José (editor) / Ribeiro, Diogo (editor) / Neves, Maria Graça (editor) / Faria, Paulina (editor) / Ribeiro, Diogo (author) / Bragança, Cássio (author) / Silva, Artur (author) / Calçada, Rui (author)
2023-03-29
28 pages
Article/Chapter (Book)
Electronic Resource
English
Dynamic effects in railway bridges
| Engineering Index Backfile | 1933
Dynamic investigations of railway bridges
| British Library Conference Proceedings | 2006
Dynamic Stress Analysis of Railway Bridges
| ASCE | 2021