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GFRP/UHPFRC Composite Girder**

GFRP/UHPFRC 复合梁**

基本信息

批准号：
536399-2018
负责人：
Gauvreau, Paul
金额：
$ 1.82万
依托单位：
University of Toronto
依托单位国家：
加拿大
项目类别：
Engage Grants Program
财政年份：
2018
资助国家：
加拿大
起止时间：
2018-01-01 至 2019-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=651637
关键词：
GFRP UHPFRC Composite Girder

项目摘要

The objective of the proposed research is to establish critical elements of knowledge that will enable the development of a novel composite girder suitable for bridge construction. The girder will be constructed of glass fibre reinforced polymer (GFRP) and ultra high-performance fibre reinforced concrete (UHPFRC). It will have a single-cell box cross-section with top flange extending beyond the webs, and will consist of a lower GFRP component with "U" section and an upper horizontal plate. Construction of a given girder has the following main steps: (1) place a thin layer of UHPFRC in the bottom of the "U" section, thus creating a composite bottom flange, (2) bond the upper plate to the "U" section using adhesive, and (3) place a thin layer of UHPFRC on the upper plate, thus creating a composite top flange. The transfer of shear between GFRP and UHPFRC is critical to the structural performance of the girder. It will be accomplished using a texture formed into the surface of the GRFP components as well as an array of protrusions reinforced with glass fibre. The research focuses on validating the performance of this shear connection under static load and in fatigue. The behaviour will be studied using a scale model girder constructed of the two materials and using the proposed detail for transferring shear. The test program will include static load tests at serviceability limit state, free vibration tests, fatigue tests, and tests of ultimate capacity of the girder in bending and shear.

拟议的研究的目的是建立知识的关键要素，这将使一种新型的组合梁适合桥梁建设的发展。主梁将由玻璃纤维增强聚合物（GFRP）和超高性能纤维增强混凝土（UHPFRC）构成。它将有一个单室箱形截面，顶部翼缘延伸到腹板之外，并将由一个带有“U”形截面的下部GFRP部件和一个上部水平板组成。给定梁的施工具有以下主要步骤：（1）在“U”形截面的底部放置一薄层UHPFRC，从而形成复合底部翼缘，（2）使用粘合剂将上板粘合到“U”形截面，以及（3）在上板上放置一薄层UHPFRC，从而形成复合顶部翼缘。GFRP和UHPFRC之间的剪力传递对梁的结构性能至关重要。这将通过在GRFP组件表面形成纹理以及用玻璃纤维增强的突起阵列来实现。研究的重点是验证这种剪切连接在静载和疲劳下的性能。将使用由两种材料构成的比例模型梁并使用建议的剪力传递详图来研究性能。试验计划将包括正常使用极限状态下的静载荷试验、自由振动试验、疲劳试验以及主梁弯曲和剪切极限承载力试验。