华南理工大学学报(自然科学版) ›› 2024, Vol. 52 ›› Issue (1): 110-118.doi: 10.12141/j.issn.1000-565X.220748

• 交通运输工程 • 上一篇    下一篇

波纹钢形状与拱效应对加固盖板涵承载力的影响

李百建1,2 黄炎1 符锌砂1   

  1. 1.华南理工大学 土木与交通学院, 广东 广州 510640
    2.广州市建筑科学研究院集团有限公司 结构研究一所, 广东 广州 510440
  • 收稿日期:2022-11-15 出版日期:2024-01-25 发布日期:2023-03-30
  • 通信作者: 符锌砂(1955-),男,教授,博士生导师,主要从事道路相关理论研究。 E-mail:fuxinsha@163.com
  • 作者简介:李百建(1987-),男,博士后,讲师,主要从事钢波纹板结构研究。E-mail:bjian_li@163.com
  • 基金资助:
    国家自然科学基金青年科学基金资助项目(52108142)

Influence of Shapes of Corrugated Steel Plate on Load-Carrying Capacity of Reinforced Concrete Slab Culvert and Arch Effect with Lateral Restraint

LI Baijian1,2 HUANG Yan1 FU Xinsha1   

  1. 1.School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China
    2.The 1st Structural Engineering Institute,Guangzhou Institute of Building Science Group Co. ,Ltd. ,Guangzhou 510440,Guangdong,China
  • Received:2022-11-15 Online:2024-01-25 Published:2023-03-30
  • Contact: 符锌砂(1955-),男,教授,博士生导师,主要从事道路相关理论研究。 E-mail:fuxinsha@163.com
  • About author:李百建(1987-),男,博士后,讲师,主要从事钢波纹板结构研究。E-mail:bjian_li@163.com
  • Supported by:
    the National Natural Science Foundation of China for Youths(52108142)

摘要:

为了探索波纹钢形状对加固盖板涵承载力的影响及填充混凝土的拱效应形成机制,采用室内试验与数值分析相结合的研究方法,以一个室内模型试验结果为基准,建立了72个箱形、圆弧及其之间的过渡形状的波纹钢加固盖板涵的数值模型,探明了加固体系承载力随波纹钢形状参数的变化规律;基于合理拱轴的概念,探明了填充混凝土的拱效应形成机理,并采用5个数值模型进行了验证。结果表明:拱腋半径保持不变时,加固体系的承载力随着拱顶、侧墙半径的增加而减小;拱顶、侧墙半径不变时,加固体系的承载力随着拱腋半径的增加而增大;提升加固体系承载力最有效的方式是增加拱腋半径,其次是减小拱顶和侧墙半径;填充混凝土的拱效应与荷载类型有关,当波纹钢的形状能保持拱轴连续并且在素混凝土刚性角以内时,加固体系的承载力最高。在设计波纹钢加固盖板涵结构时,应根据实际工程需要综合考虑波纹钢形状与填充混凝土的拱效应,尽量避免紧贴原盖板涵的加固设计。

关键词: 道路工程, 钢筋混凝土盖板涵, 波纹钢加固, 数值分析, 拱效应判别

Abstract:

To explore the influence of the shape of corrugated steel plate (CSP) on the reinforced concrete (RC) slab culvert rehabilitated with grouted CSP, and the discrimination of arch effect of grout, this paper established 72 numerical models of the rehabilitated system with box, arc and transition shapes of CSPs by combining laboratory test with numerical analysis, based on the laboratory experimental results. The variation law of the load-carrying capacity of the rehabilitated system changed with the shape parameters of CSPs was ascertained. In addition, based on the concept of reasonable arch axis, the formation mechanism of arch effect of grout was also ascertained and verified by five numerical models. The results indicate that, when the radius of the haunch of CSP remained constant, the load-carrying capacity of the rehabilitated system increases upon decreasing of the radius of side walls and crown; when the side walls and crown of CSP remained constant, the load-carrying capacity of the rehabilitated system increases with the increase of the radius of the arch haunches; the most effective way to improve the load-carrying capacity of the rehabilitated system is to increase the radius of the haunches, followed by reducing the radius of the vault and side wall. The arch effect of grout was related to the load types. When the shape of CSP can keep the arch axis continuous and within the rigid angle of grout, the load-carrying capacity of the rehabilitated system is the highest. The structural design of the RC slab culvert rehabilitated with CSP should comprehensively consider the shapes of CSP and the arch effect of grout according to the actual needs of the project, and try to avoid the rehabilitation design close to the original RC slab culvert as far as possible.

Key words: road engineering, reinforced concrete slab culvert, rehabilitation with corrugated steel plate, numerical analysis, discrimination of arch effect

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