Stress checklist of box girder structure based on spatial grid analysis method

IF 2.9 4区工程技术 Q2 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Computers and Concrete Pub Date : 2021-05-01 DOI:10.12989/CAC.2021.27.5.407

Ying-sheng Ni, Ming Li, Donghui Xu

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引用次数: 1

Abstract

The checking stresses in the Chinese codes for reinforced concrete (RC) or prestressed concrete (PC) bridges are aimed for the thin-web beam, which cannot reflect the actual behavior of the modern structures. The incompleteness of the checking stresses could give rise to the deficiency in the design and calculation, and unable to reveal the reason of some common cracks in the structure. In this paper, the complete stress checklist for RC or PC girder bridges are listed, as well as the corresponding crack shapes. The expression of the complete checking stresses is proposed in details. Spatial Grid Model can reflect all the concerned stresses in the structure. Through the comparison of the calculation results from the spatial grid model and the solid model, it is seen that the spatial grid model can reflect load effects such as shear lag effect, thin-wall effect and local effect. The stresses obtained from the spatial grid model could help engineers to have a good understanding of the structural behavior. Meanwhile, the stress checklist provides the information for analyzing and solving the deficiency in the structure.

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基于空间网格分析法的箱梁结构应力检查表

我国现行钢筋混凝土或预应力混凝土桥梁规范中规定的校核应力是针对薄腹板梁的，不能反映现代结构的实际性能。验算应力的不完整会导致设计计算的不足，无法揭示结构中一些常见裂缝的产生原因。本文列出了RC或PC梁桥的完整应力表，以及相应的裂缝形态。给出了完整校核应力的具体表达式。空间网格模型可以反映结构中所有相关的应力。通过空间网格模型与实体模型计算结果的对比，可以看出空间网格模型能够反映剪力滞效应、薄壁效应和局部效应等荷载效应。从空间网格模型中得到的应力可以帮助工程师更好地理解结构的性能。同时，应力检查表为分析和解决结构缺陷提供了依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Computers and Concrete 工程技术-材料科学：表征与测试

CiteScore

8.60

自引率

7.30%

发文量

审稿时长

13.5 months

期刊介绍： Computers and Concrete is An International Journal that focuses on the computer applications in be considered suitable for publication in the journal. The journal covers the topics related to computational mechanics of concrete and modeling of concrete structures including plasticity fracture mechanics creep thermo-mechanics dynamic effects reliability and safety concepts automated design procedures stochastic mechanics performance under extreme conditions.