高速荷载作用下双线连续整体铁路桥梁动力影响因素研究

IF 0.8 Q4 ENGINEERING, CIVIL

Electronic Journal of Structural Engineering Pub Date : 2023-07-25 DOI:10.56748/ejse.234203

Anand M. Gharad, Ranjan S. Sonparote

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引用次数: 0

摘要

本研究对一座四跨非棱柱形连续等效整体铁路桥在高速移动列车荷载作用下的冲击系数（IF）进行了评估。对全尺寸三维有限元桥梁模型进行了临界分析，以研究双线铁路桥梁在不同荷载条件下所有跨度的IFs的差异。提出了一种简化的方法来识别动态IF值。结果表明，对于连续桥，随着桥上荷载的增加，IF系数从0.195降低到0.102。然而，对于整体桥和考虑的荷载条件，获得了几乎相似的IF系数（0.100）。对于中间跨度，与等效连续桥相比，整体桥的共振现象在较低的速度下实现。

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Study of dynamic impact factors of two-track continuous and integral railway bridge subjected to high-speed loads

The impact factor (IF) assessment of a four-span non-prismatic continuous and an equivalent integral railway bridge under the action of high-speed moving train loads is conducted in this study. Critical analysis of the full-scale three-dimensional finite element (FE) bridge models is done to investigate the differences in the IFs of all the spans of the two-track railway bridge under various loading conditions. A simplified approach is proposed to identify the dynamic IF values. The results show that for a continuous bridge, with the increase in the load on the bridge, IF coefficients reduce from 0.195 to 0.102. However, for the integral bridge, and considered loading conditions, almost similar IF coefficients (0.100) are obtained. For the intermediate spans, the resonance phenomenon for the integral bridge is achieved at lower speeds compared to the equivalent continuous bridge.

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来源期刊

Electronic Journal of Structural Engineering Engineering-Civil and Structural Engineering

CiteScore

1.10

自引率

16.70%

发文量

期刊介绍： The Electronic Journal of Structural Engineering (EJSE) is an international forum for the dissemination and discussion of leading edge research and practical applications in Structural Engineering. It comprises peer-reviewed technical papers, discussions and comments, and also news about conferences, workshops etc. in Structural Engineering. Original papers are invited from individuals involved in the field of structural engineering and construction. The areas of special interests include the following, but are not limited to: Analytical and design methods Bridges and High-rise Buildings Case studies and failure investigation Innovations in design and new technology New Construction Materials Performance of Structures Prefabrication Technology Repairs, Strengthening, and Maintenance Stability and Scaffolding Engineering Soil-structure interaction Standards and Codes of Practice Structural and solid mechanics Structural Safety and Reliability Testing Technologies Vibration, impact and structural dynamics Wind and earthquake engineering. EJSE is seeking original papers (research or state-of the art reviews) of the highest quality for consideration for publication. The papers will be published within 3 to 6 months. The papers are expected to make a significant contribution to the research and development activities of the academic and professional engineering community.