轨道轴线曲率和支撑线倾角对混凝土预埋钢梁铁路桥梁上部结构的同时影响

IF 0.1 Q4 ENGINEERING, CIVIL Romanian Journal of Transport Infrastructure Pub Date : 2018-12-01 DOI:10.2478/rjti-2018-0013
Stănescu Răzvan Marian, Stan Oana Mihaela
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引用次数: 0

摘要

摘要对于新建的小跨径(L≤35.00 m)铁路桥,推荐采用混凝土预埋钢梁的上部结构,这种结构在不受速度影响的情况下,能保证强度尤其是刚度的要求。在迄今为止所使用的钢筋混凝土预埋上部结构的设计规程中,甚至在技术文献中,很少有关于支撑线倾角和轨道轴曲率在这类结构的设计和计算中的影响的信息和数据。在设计规范中,如果满足与上层建筑几何形状有关的某些条件(斜度,曲率),则计算是简化的,对甲板的单个隔离纵梁进行计算;否则,如果不满足条件,建议采用有限元程序分析。本文旨在研究不符合设计规范要求的情况。
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Simultaneous Influence of the Track Axis Curvature and the Support Line Obliquity at Railway Bridge Superstructures with Steel Beams Embedded in Concrete
Abstract For new railway bridges with small spans (L ≤ 35.00 m) superstructures with steel beams embedded in concrete are recommended and used, which can ensure the requirements of strength and especially stiffness, regardless of velocity. In all the design prescriptions used so far for superstructures with steel beams embedded in concrete, and even in the technical literature, there is little information and data on the influence of the support line obliquity and the track axis curvature in the design and calculation of these types of structures. In the design code, if certain conditions related to the geometry of the superstructure are met (obliquity, curvature) the calculation is a simplified one, made on a single isolated longitudinal beam of the deck; otherwise, if the conditions are not met, finite element program analysis is recommended. The article aims to study the situations in which the requirements of the design prescriptions are not met.
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