新型无格室钢-UHPC结合段受力性能及参数分析

doi:10.3969/j.issn.1674-0696.2023.01.05

重庆交通大学学报（自然科学版） ›› 2023, Vol. 42 ›› Issue (1): 27-35.DOI: 10.3969/j.issn.1674-0696.2023.01.05

新型无格室钢-UHPC结合段受力性能及参数分析

赵华1，卢珂宇1，孙韬1，刘榕2，卢立志2

(1. 湖南大学土木工程学院风工程与桥梁工程湖南省重点实验室，湖南长沙 410082； 2. 湖南省交通规划勘察设计院有限公司，湖南长沙 410008)

收稿日期:2022-03-24 修回日期:2022-12-19 出版日期:2023-02-28 发布日期:2023-03-14
作者简介:赵华（1975—），男，湖北松滋人，教授，博士，主要从事新型桥梁结构、既有桥梁的评定及维护，及桥梁动态称重系统研究。E-mail：zhaohua@hnu.edu.cn 通信作者：卢珂宇（1997—），女，河南南阳人，硕士研究生，主要从事新型桥梁结构研究。E-mail：lukeyu@hnu.edu.cn
基金资助:
国家自然科学基金面上项目（51978256）

Mechanical Performance and Parametric Analysis of Novel Steel-UHPC Joints without Cell

ZHAO Hua1, LU Keyu1, SUN Tao1, LIU Rong2, LU Lizhi2

(1. Key Laboratory for Wind and Bridge Engineering of Hunan Province, School of Civil Engineering, Hunan University, Changsha 410082, Hunan, China; 2. Hunan Provincial Communications Planning, Survey & Design Institute Co. Ltd., Changsha 410082, Hunan, China)

Received:2022-03-24 Revised:2022-12-19 Online:2023-02-28 Published:2023-03-14

摘要/Abstract

摘要： 为研究新型无格室钢-UHPC结合段的受力性能和传力机理，以主跨240 m的沅水特大桥主桥为研究背景，采用有限元分析方法建立了钢-UHPC结合段局部模型，分析了结构受力以及影响结构传力的构造参数。结果表明：在最不利正弯矩工况下，结构传力平顺，各部分应力基本满足要求；栓钉连接件剪力大小基本呈马鞍状分布，综合剪力最大达29.7 kN，具有一定的安全储备；承压板承担轴向荷载比例为82.34%，承担比例随着承压板厚度的增大有所提高；混凝土强度增大和UHPC顶/底板厚度增大均可减小栓钉连接件剪力；UHPC结合段能有效减小栓钉连接件滑移；结合段长度增大的同时不能有效发挥中间栓钉连接件抗剪作用。

关键词: 桥梁工程, 无格室钢-UHPC结合段, 承压板, 栓钉连接件, 有限元分析

Abstract: To investigate the mechanical performance and the force transfer mechanism of the novel steel-UHPC joints without cell, the main bridge of Yuanshui Grand Bridge with a main span of 240 m was cited as the research background. The local model of steel-UHPC joints was established by FEM, and the structural forces and the structural parameters affecting the structural force transmission were analyzed. The results show that: the structure has smooth structural force transmission and the stresses in each part basically meet the requirements even under the most unfavorable positive bending moment condition; the shear force of studs is basically distributed in saddle shape, and the maximum comprehensive shear force is up to 29.7kN, with a certain safety reserve; the proportion of axial load borne by the pressure bearing plate is about 82.34%, and the proportion of axial load borne by the pressure bearing plate increases as its thickness increases; the increase of the concrete strength and the thicknesses of the UHPC top and bottom plates can reduce the shear force of studs; the UHPC joints can effectively reduce the slip of the studs; when the length of the joints increases, the shear resistance of the middle studs cannot be effectively exerted.

Key words: bridge engineering, steel-UHPC joints without cell, pressure bearing plate, studs, FEM

中图分类号:

U448.27

赵华, 卢珂宇, 孙韬, 刘榕, 卢立志. 新型无格室钢-UHPC结合段受力性能及参数分析[J]. 重庆交通大学学报（自然科学版）, 2023, 42(1): 27-35.

ZHAO Hua, LU Keyu, SUN Tao, LIU Rong, LU Lizhi. Mechanical Performance and Parametric Analysis of Novel Steel-UHPC Joints without Cell[J]. Journal of Chongqing Jiaotong University(Natural Science), 2023, 42(1): 27-35.

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新型无格室钢-UHPC结合段受力性能及参数分析

Mechanical Performance and Parametric Analysis of Novel Steel-UHPC Joints without Cell

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