Journal
VEHICLE SYSTEM DYNAMICS
Volume 59, Issue 6, Pages 949-973Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00423114.2020.1739316
Keywords
Light rail vehicles; vehicle-bridge interaction system; near-fault; vertical ground motions; dynamic substructuring method; running safety
Categories
Funding
- National Key RD Program [2018YFC1504306]
- Open Foundation of MOE Key Laboratory of Engineering Structures of Heavy Haul Railway (Central South University) [2019JZZ01]
- Hunan Innovative Provincial Construction Project [2019RS3009]
- Special Fund of Strategic Leader in Central South University [2016CSU001]
- Open Foundation of the National Engineering Laboratory for Construction Technology of High-Speed Rail (Central South University)
- National Science Foundation of China [51778630, 51578478, 51878589, 51708485, 51708484]
- China Postdoctoral Science Foundation [2015M581702, 2016M592695]
- Science and Technology Project of Jiangsu Province Construction System in 2018 [2018ZD039]
- 2018 Jiangsu Provincial Government Scholarship Program [228]
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This paper focuses on rapid elastoplastic analyses of light rail vehicle (LRV) benchmark viaduct system under different seismic scenarios using the dynamic substructuring method (DSM). A new framework of train-track system space dynamics is constructed by combining the energy-variational principle with the vehicle-bridge interaction (VBI) system. Results indicate that large vertical ground motions (VGMs) greatly impact the seismic response of the LRV running safety in the low-frequency band compared to non-pulse-like near-fault ground motions (NFGMs) and far-field ground motions (FFGMs), emphasizing the importance of distinguishing velocity pulses when selecting NFGMs for assessing the nonlinear dynamic response of the VBI system.
This paper focuses on the rapid elastoplastic analyses of light rail vehicle (LRV)- benchmark viaduct system to different seismic scenarios considering the dynamic substructuring method (DSM). Combining the energy-variational principle with the vehicle-bridge interaction (VBI) system, a new framework of train-track system space dynamics is constructed. The present study has established the train-track-bridge coupled system (TTBCS) model, calculated the elastic-plastic seismic responses of the light rail transit bridge (LRTB) subjected to the combined effect of vertical and horizontal earthquakes. Considering three ground motion ensembles, i.e. pulse-like near-fault ground motions (NFGMs), non-pulse-like NFGMs, and far-field ground motions (FFGMs). Results indicate that the large vertical ground motions (VGMs) type NFGMs greatly impact the seismic response of the running safety of the LRV in the low-frequency band compared to the non-pulse-like NFGMs and FFGMs. The results underscore the significance of distinguishing velocity pulses of different types when selecting NFGMs for assessing the nonlinear dynamic response of the VBI system.
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