Flexural stiffness characterization of the corrugated steel–concrete composite structure for tunnel projects

IF 8.2 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space Pub Date : 2023-10-01 DOI:10.1016/j.undsp.2023.02.003

Wenqi Ding , Xuanbo Huang , Shuobiao Li , Wentong Liu , Qingzhao Zhang

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引用次数: 1

Abstract

Corrugated steel–concrete (CSC) composite structures are increasingly used in tunnel and culvert projects due to their good mechanical properties. The design of CSC composite structures is often governed by deflection limits in service, hence it becomes crucial to evaluate accurately their flexural stiffness. In this work, the deflection deformation mechanism of CSC composite structure is studied by experimental and numerical methods, and a simplified formula for calculating the flexural stiffness is established. In addition, the deflection results obtained by different methods are compared and analyzed. It is found that: (1) the flexural stiffness of the CSC composite structure is constant only when the load is small, and after the bending moment exceeds a certain value, the flexural stiffness will gradually become smaller as the bending moment increases. (2) The value of the bending moment corresponding to the end of the elastic stage of the bending moment-deflection curve increases with the increase of the axial force in the composite structure. (3) As the axial force of the composite structure increases, the flexural bearing capacity of the structure increases first and then decreases.

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隧道工程波纹钢-混凝土组合结构的抗弯刚度特性

波纹钢-混凝土（CSC）复合结构由于其良好的力学性能，越来越多地应用于隧道和涵洞工程中。CSC复合材料结构的设计通常受到使用中的挠度极限的控制，因此准确评估其抗弯刚度变得至关重要。本文采用实验和数值方法研究了CSC复合材料结构的挠度变形机理，建立了计算弯曲刚度的简化公式。此外，对不同方法得到的挠度结果进行了比较和分析。研究发现：（1）CSC复合材料结构的抗弯刚度只有在荷载较小时才是恒定的，当弯矩超过一定值后，随着弯矩的增加，抗弯刚性会逐渐变小。（2）在复合结构中，与弯矩-挠度曲线的弹性阶段结束相对应的弯矩值随着轴向力的增加而增加。（3）随着复合材料结构轴向力的增大，结构的抗弯承载力先增大后减小。

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

Underground Space ENGINEERING, CIVIL-

CiteScore

10.20

自引率

14.10%

发文量

审稿时长

63 days

期刊介绍： Underground Space is an open access international journal without article processing charges (APC) committed to serving as a scientific forum for researchers and practitioners in the field of underground engineering. The journal welcomes manuscripts that deal with original theories, methods, technologies, and important applications throughout the life-cycle of underground projects, including planning, design, operation and maintenance, disaster prevention, and demolition. The journal is particularly interested in manuscripts related to the latest development of smart underground engineering from the perspectives of resilience, resources saving, environmental friendliness, humanity, and artificial intelligence. The manuscripts are expected to have significant innovation and potential impact in the field of underground engineering, and should have clear association with or application in underground projects.

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