弯曲预应力混凝土箱梁桥的有限元计算分析。

IF 3.9 2区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Shubhi Ojha, Priyaranjan Pal, P K Mehta
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引用次数: 0

摘要

采用有限元方法研究了曲线角变化对单室和双室预应力混凝土箱梁桥性能的影响。总共检查了80个桥梁模型,具有从0到60°的曲线角度范围,每个模型之间的增量为12°(0°,12°,24°,36°,48°和60°)。研究表明,曲线角度为24°或更小的桥梁对力的影响最小,这表明它们可以有效地作为直桥进行分析。研究表明,弯曲角大于24°的桥梁结构响应发生了显著变化,突出了曲率增加对桥梁行为的影响。在各种荷载类型下,包括死荷载、活荷载和预应力荷载,对曲线角度、跨度长度、单元数和跨深比的变化对结构力和挠度的影响进行了综合评估。随着曲线角度的增大,预应力加载条件下的弯矩和竖向挠度相应减小。通过分析,可以合理地得出预应力混凝土箱梁桥最适合于曲线角度较大的应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Computational analysis of curved prestressed concrete box-girder bridges using finite element method.

Computational analysis of curved prestressed concrete box-girder bridges using finite element method.

Computational analysis of curved prestressed concrete box-girder bridges using finite element method.

Computational analysis of curved prestressed concrete box-girder bridges using finite element method.

The study employs finite element method to examine the effects of curve angle variations on the behavior of single and double-cell prestressed concrete box-girder bridges. A total of eighty bridge models were examined, featuring a range of curve angles from 0 to 60°, with increments of 12° between each model (0°, 12°, 24°, 36°, 48°, and 60°). The study revealed that bridges with curve angles of 24° or less exhibit minimal impact on forces, suggesting that they can be effectively treated as straight bridges for analytical purposes. The study revealed a marked change in structural response for bridges with curve angles greater than 24°, highlighting the influence of increased curvature on bridge behavior. A comprehensive evaluation was conducted to investigate the influence of changes in curve angles, span lengths, cell numbers, and span-depth ratios on structural forces and deflections under various load types, including dead, live, and prestressed loads. As the curve angle increases, a corresponding decrease in the flexural moment and vertical deflection is observed under prestressed loading conditions. Based on the analysis, it is reasonable to conclude that prestressed concrete box-girder bridges are best suited for applications involving higher curve angles.

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来源期刊
Scientific Reports
Scientific Reports Natural Science Disciplines-
CiteScore
7.50
自引率
4.30%
发文量
19567
审稿时长
3.9 months
期刊介绍: We publish original research from all areas of the natural sciences, psychology, medicine and engineering. You can learn more about what we publish by browsing our specific scientific subject areas below or explore Scientific Reports by browsing all articles and collections. Scientific Reports has a 2-year impact factor: 4.380 (2021), and is the 6th most-cited journal in the world, with more than 540,000 citations in 2020 (Clarivate Analytics, 2021). •Engineering Engineering covers all aspects of engineering, technology, and applied science. It plays a crucial role in the development of technologies to address some of the world''s biggest challenges, helping to save lives and improve the way we live. •Physical sciences Physical sciences are those academic disciplines that aim to uncover the underlying laws of nature — often written in the language of mathematics. It is a collective term for areas of study including astronomy, chemistry, materials science and physics. •Earth and environmental sciences Earth and environmental sciences cover all aspects of Earth and planetary science and broadly encompass solid Earth processes, surface and atmospheric dynamics, Earth system history, climate and climate change, marine and freshwater systems, and ecology. It also considers the interactions between humans and these systems. •Biological sciences Biological sciences encompass all the divisions of natural sciences examining various aspects of vital processes. The concept includes anatomy, physiology, cell biology, biochemistry and biophysics, and covers all organisms from microorganisms, animals to plants. •Health sciences The health sciences study health, disease and healthcare. This field of study aims to develop knowledge, interventions and technology for use in healthcare to improve the treatment of patients.
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