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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

40卷

期数:

2023年02期

页码:

77-85

栏目:

建筑结构

出版日期:

2023-03-30

文章信息/Info

Title:

Test on shear performance of segmental precast epoxied joint

文章编号:

1673-2049(2023)02-0077-09

作者:

苟文忠¹,陈 浩²,程 高^3,4,王鹏琪³

(1. 陕西路桥集团有限公司,陕西 西安 710075; 2. 中铁第一勘察设计院集团有限公司,陕西 西安 710043; 3. 长安大学 公路学院,陕西 西安 710064; 4. 西藏天路股份有限公司, 西藏 拉萨 850000)

Author(s):

GOU Wenzhong¹, CHEN Hao², CHENG Gao^3,4, WANG Pengqi³

(1. Shaanxi Road & Bridge Group Co., Ltd, Xi'an 710075, Shaanxi, China; 2. China Railway First Survey and Design Institute Group Co., Ltd., Xi'an 710043, Shaanxi, China; 3. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 4. Xizang Tianlu Co, Ltd, Lasa 850000, Xizang, China)

关键词:

节段预制;  胶接缝;  剪力键;  直剪试验

Keywords:

segmental precast;  epoxied joint;  shear key;  direct shear test

分类号:

U441.5

DOI:

10.19815/j.jace.2021.09068

文献标志码:

A

摘要:

为研究混凝土节段预制胶接缝的抗剪性能,考虑接缝形式、环氧树脂胶厚度、剪力键键齿数目进行了胶接缝剪力键足尺直剪试验,分析了试件的破坏形态。根据试件抗剪承载力和竖向相对滑移研究规范化剪应力-竖向相对滑移曲线,比较分析现有胶接缝剪力键抗剪承载力计算公式的误差。结果表明:与平面胶接缝和湿接缝相比,单键齿胶接缝试件的抗剪承载力、规范化剪应力和塑性变形能力均有所提高; 单键齿胶接缝试件的环氧树脂胶厚度越大,则单键齿胶接缝试件抗剪承载力越高,规范化剪应力越大,其塑性变形能力越好; 双键齿胶接缝试件的抗剪承载力比单键齿胶接缝试件的抗剪承载力高,其塑性变形能力比单键齿胶接缝试件的塑性变形能力好; 不宜忽略环氧树脂胶厚度对胶接缝剪力键抗剪承载力的影响。

Abstract:

In order to study the shear performance of the precast epoxied joints of concrete segments, a full-scale direct shear test of the epoxied joint was carried out in consideration of the joint form, the thickness of the epoxy resin and the number of shear keys, and the failure modes of the specimens were analyzed. According to the shear bearing capacity and vertical relative slip, the normalized shear stress-vertical relative slip curve was studied, and the existing shear bearing capacity formulas were compared and analyzed. The results show that compared with flat epoxied joints and wet joints, the shear resistance, normalized shear stress and plastic deformation capacity of the single keyed epoxied joint specimens are improved. The greater the thickness of the epoxy resin of the single key, the higher the shear resistance of the single keyed joint, the greater the normalized shear stress, and the better its plastic deformation ability. The shear bearing capacity of the double keyed epoxied joint specimens is higher than that of the single keyed epoxied joint specimens, and its plastic deformation capacity is better than that of the single keyed epoxied joint specimen. It is not advisable to ignore the influence of the thickness of the epoxy resin on the shear performance of epoxied joint.

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相似文献/References:

[1]王 震,王景全.预应力节段预制拼装桥墩抗震性能研究综述[J].建筑科学与工程学报,2016,33(06):88.
　WANG Zhen,WANG Jing-quan.Review of Seismic Performance of Prestressed Segmental Precast and Assembled Piers[J].Journal of Architecture and Civil Engineering,2016,33(02):88.

备注/Memo

备注/Memo:

收稿日期:2021-09-17
基金项目:中国博士后科学基金项目(2020M673601XB); 陕西省交通运输科技项目(20-35T,19-14K); 陕西省秦创原“科学家+工程师”队伍建设项目(2022KXJ-036)
作者简介:苟文忠(1973-),男,高级工程师,E-mail:15229371880 @ qq.com。
通信作者:程 高(1988-),男,工学博士,高级工程师,博士生导师,E-mail:chengg@chd.edu.cn。

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更新日期/Last Update: 2023-03-20