Structural Behavior of Axially Loaded Geopolymer Concrete Sandwich Wall Panel Reinforced with BFRP Grids

Sushil Kumar, Binqi Chen, Yuye Xu, Jian Guo Dai

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


A new type of precast concrete sandwich wall panel, consisting of two basalt fiber reinforced polymer (FRP) reinforced geopolymer concrete wythes and an insulation layer, which are connected with hollow tubular glass FRP connectors, is studied in this paper. Ten sandwich wall panels were prefabricated and subjected to concentric axial loading. The primary test variables included slenderness ratio of the wall panel, longitudinal spacing of connectors, and the ratio of the wythe thickness to the insulation layer thickness. The load-deflection relationships, failure modes, and load-strain relationships were carefully investigated. All the wall panels failed by crushing of concrete. The spacing of FRP connectors was found to have a marginal impact on the axial load capacity because of the existence of capping beams at the end of panels. A theoretical second-order analysis was performed to predict the ultimate axial load of equivalently assumed solid wall panels. The effective slenderness ratio of the sandwich wall panel was deduced from the comparison of the theoretically predicted results with the experimental ones.

Original languageEnglish
Title of host publication10th International Conference on FRP Composites in Civil Engineering - Proceedings of CICE 2020/2021
EditorsAlper Ilki, Medine Ispir, Pinar Inci
PublisherSpringer Science and Business Media Deutschland GmbH
Number of pages13
ISBN (Print)9783030881658
Publication statusPublished - 2022
Event10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2021 - Virtual, Online
Duration: 8 Dec 202110 Dec 2021

Publication series

NameLecture Notes in Civil Engineering
Volume198 LNCE
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565


Conference10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2021
CityVirtual, Online


  • Axial loading
  • BFRP reinforcement
  • FRP connector
  • Geopolymer concrete
  • Precast sandwich panel

ASJC Scopus subject areas

  • Civil and Structural Engineering

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