Experimental investigation on shear behavior of double-row perforated GFRP rib connectors in FRP-concrete hybrid beams

IF 2.1 4区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Advances in Structural Engineering Pub Date : 2024-09-14 DOI:10.1177/13694332241281549

Weichen Xue, Dawei Yan, Yongsheng Wang, Jiafei Jiang

{"title":"Experimental investigation on shear behavior of double-row perforated GFRP rib connectors in FRP-concrete hybrid beams","authors":"Weichen Xue, Dawei Yan, Yongsheng Wang, Jiafei Jiang","doi":"10.1177/13694332241281549","DOIUrl":null,"url":null,"abstract":"Perforated GFRP rib (PFR) connectors have been used in FRP-concrete hybrid beams due to durability and ease of construction. PFR connectors are parallel FRP plates with predrilled holes positioned in the flange of FRP beams. The optimal plate spacing needs to be determined because it affects the shear performance of PFR connectors. 18 push-out tests were conducted to investigate the effect of plate spacing ( Sl), penetrating GFRP bar diameter ( d), and concrete strength ( fc) on the failure mode, capacity, and shear load-slip (P-S) curves of double-row PFR connectors. Results showed that PFR connectors suffered plate shear failure with the concrete dowel undamaged. Typical P-S curves consisted of micro-slipping and significant-slipping phases. The shear capacity and stiffness of PFR connectors were improved by 33.3% and 45.1%, respectively, by increasing the plate spacing from 1.2 h (where h denotes the plate height) to 3.2 h. The effect of plate spacing on shear capacity and stiffness could be neglected if the ratio ( Sl/ h) was more than 3.2. Specimens with a larger diameter of penetrating bar and higher concrete strength demonstrated higher capacity and stiffness. An empirical equation based on the maximum stress failure criterion was proposed to estimate the capacity of PFR connectors, considering the plate spacing effect, and verified by available data. Additionally, a description of the P-S curve was developed and calibrated by the experimental results.","PeriodicalId":50849,"journal":{"name":"Advances in Structural Engineering","volume":null,"pages":null},"PeriodicalIF":2.1000,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advances in Structural Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1177/13694332241281549","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

Perforated GFRP rib (PFR) connectors have been used in FRP-concrete hybrid beams due to durability and ease of construction. PFR connectors are parallel FRP plates with predrilled holes positioned in the flange of FRP beams. The optimal plate spacing needs to be determined because it affects the shear performance of PFR connectors. 18 push-out tests were conducted to investigate the effect of plate spacing ( Sl), penetrating GFRP bar diameter ( d), and concrete strength ( fc) on the failure mode, capacity, and shear load-slip (P-S) curves of double-row PFR connectors. Results showed that PFR connectors suffered plate shear failure with the concrete dowel undamaged. Typical P-S curves consisted of micro-slipping and significant-slipping phases. The shear capacity and stiffness of PFR connectors were improved by 33.3% and 45.1%, respectively, by increasing the plate spacing from 1.2 h (where h denotes the plate height) to 3.2 h. The effect of plate spacing on shear capacity and stiffness could be neglected if the ratio ( Sl/ h) was more than 3.2. Specimens with a larger diameter of penetrating bar and higher concrete strength demonstrated higher capacity and stiffness. An empirical equation based on the maximum stress failure criterion was proposed to estimate the capacity of PFR connectors, considering the plate spacing effect, and verified by available data. Additionally, a description of the P-S curve was developed and calibrated by the experimental results.

查看原文本刊更多论文

玻璃钢-混凝土混合梁中双排穿孔玻璃纤维增强塑料肋连接器剪切行为的实验研究

穿孔玻璃纤维增强塑料肋 (PFR) 连接器因其耐用性和施工简便性而被用于玻璃纤维增强塑料-混凝土混合梁。PFR 连接器是平行的 FRP 板，在 FRP 梁的翼缘板上有预先钻好的孔。最佳板间距需要确定，因为它会影响 PFR 连接器的剪切性能。为了研究板间距（Sl）、穿透式 GFRP 杆件直径（d）和混凝土强度（fc）对双排 PFR 连接器的破坏模式、承载能力和剪切荷载-滑移（P-S）曲线的影响，进行了 18 次推出试验。结果表明，在混凝土榫头未损坏的情况下，PFR 连接器会发生板剪破坏。典型的 P-S 曲线包括微小滑动和显著滑动阶段。板间距从 1.2 h（h 表示板高）增加到 3.2 h 后，PFR 连接器的抗剪能力和刚度分别提高了 33.3% 和 45.1%。贯穿钢筋直径越大、混凝土强度越高的试样，其承载力和刚度就越大。考虑到板间距效应，提出了一个基于最大应力失效准则的经验方程来估算 PFR 连接器的承载能力，并通过现有数据进行了验证。此外，还对 P-S 曲线进行了描述，并根据实验结果进行了校准。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Advances in Structural Engineering 工程技术-工程：土木

CiteScore

5.00

自引率

11.50%

发文量

230

审稿时长

2.3 months

期刊介绍： Advances in Structural Engineering was established in 1997 and has become one of the major peer-reviewed journals in the field of structural engineering. To better fulfil the mission of the journal, we have recently decided to launch two new features for the journal: (a) invited review papers providing an in-depth exposition of a topic of significant current interest; (b) short papers reporting truly new technologies in structural engineering.