Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Interlayer area damage modeling and damage-based seismic fragility analysis of high-speed railway bridge and track system
Highlights Quantify the seismic damage and failure in a long multilayer structure by an interlayer area damage model. Derive multi-resolution damage measures of the track subsystem in a high-speed railway bridge-track system for different engineering demands. Identify the extension and interconnection behaviors of individual isolated interlayer damage regions along the entire track subsystem. Determine an onset of interlayer overall failure of the track subsystem.
Abstract A novel interlayer damage model is proposed to assess the seismic performance of the track subsystem in a high-speed railway bridge-track system (HSRBTS). The track subsystem can be treated as a long multilayer structure with vertically compact and longitudinally continuous interlayer bonding, leading to a particular damage mode, namely, interlayer separation in a certain area. This differs from the bridge subsystem and moment resisting frame dominating by the failure of sidesway collapse, generally measured by the maximum peak interstory drift. For this specialized structure, a novel framework of the interlayer area damage model (IADM) with a matrix-based damage indicator DI A is developed in a beam-spring finite element model of HSRBTS. Multi-resolution damage measures are derived for the seismic performance evaluation for different engineering demands. This scheme is adopted in a 5-span-simply-supported HSRBTS to carry out the seismic fragility analysis via incremental dynamic analysis. The result indicates that DI A quantitatively describes the distribution and size of interlayer area damage regions along the entire track subsystem, which is important for the evaluation on structural demand and train running safety of HSRBTS. Compared to the traditional damage model, the IADM provides more informative damage states in seismic fragility analysis. At a lower to moderate intensity measure level, sliding layer performs more vulnerable, but it is prevented from longitudinally through interlayer damage as observed in CA mortar layer. A critical damage state is revealed by IADM, facilitating the determination of the onset of interlayer overall failure of the track subsystem.
Interlayer area damage modeling and damage-based seismic fragility analysis of high-speed railway bridge and track system
Highlights Quantify the seismic damage and failure in a long multilayer structure by an interlayer area damage model. Derive multi-resolution damage measures of the track subsystem in a high-speed railway bridge-track system for different engineering demands. Identify the extension and interconnection behaviors of individual isolated interlayer damage regions along the entire track subsystem. Determine an onset of interlayer overall failure of the track subsystem.
Abstract A novel interlayer damage model is proposed to assess the seismic performance of the track subsystem in a high-speed railway bridge-track system (HSRBTS). The track subsystem can be treated as a long multilayer structure with vertically compact and longitudinally continuous interlayer bonding, leading to a particular damage mode, namely, interlayer separation in a certain area. This differs from the bridge subsystem and moment resisting frame dominating by the failure of sidesway collapse, generally measured by the maximum peak interstory drift. For this specialized structure, a novel framework of the interlayer area damage model (IADM) with a matrix-based damage indicator DI A is developed in a beam-spring finite element model of HSRBTS. Multi-resolution damage measures are derived for the seismic performance evaluation for different engineering demands. This scheme is adopted in a 5-span-simply-supported HSRBTS to carry out the seismic fragility analysis via incremental dynamic analysis. The result indicates that DI A quantitatively describes the distribution and size of interlayer area damage regions along the entire track subsystem, which is important for the evaluation on structural demand and train running safety of HSRBTS. Compared to the traditional damage model, the IADM provides more informative damage states in seismic fragility analysis. At a lower to moderate intensity measure level, sliding layer performs more vulnerable, but it is prevented from longitudinally through interlayer damage as observed in CA mortar layer. A critical damage state is revealed by IADM, facilitating the determination of the onset of interlayer overall failure of the track subsystem.
Interlayer area damage modeling and damage-based seismic fragility analysis of high-speed railway bridge and track system
Wen, Tianxing (Autor:in) / Jiang, Lizhong (Autor:in) / Jiang, Liqiang (Autor:in) / Zhou, Wangbao (Autor:in) / Du, Yanliang (Autor:in)
Engineering Structures ; 272
18.09.2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| Taylor & Francis Verlag | 2023