Flexural Behavior of Precast Geopolymer Concrete Sandwich Panels Enabled with FRP Connectors

Junqi Huang, Jian-Guo Dai

Research output: Unpublished conference presentation (presented paper, abstract, poster)Conference presentation (not published in journal/proceeding/book)Academic research

Abstract

In this paper, geopolymer concrete was used as the alternative to replace ordinary Portland cement (OPC) concrete in precast concrete sandwich panels. Four precast geopolymer concrete sandwich panel (PGCSP) specimens were fabricated and their flexural behavior was evaluated through four- points bending loading test. Glass fiber-reinforced polymer (FRP) shear connectors were used to realize the composite action of the two wythes. The geometrical dimensions, concrete strength and FRP shear connector distribution of the four specimens remained the same. The parameters investigated included the reinforcement type (steel and basalt fiber reinforced polymer (BFRP) rebar) and reinforcement ratio (0.7% and 1.0% for each concrete wythe). The load-deflection relationships and failure modes of the four specimens were studied and compared in details. Besides, two-dimensional finite element (FE) analysis was conducted to reproduce the test results. It was indicated that, the failure mode of all PGCSP specimens was governed by the connector failure; compared to the steel-reinforced specimens, the BFRP rebar-reinforced ones had a lower load-carrying capacity and post-cracking stiffness; the proposed FE model could accurately predict the flexural responses of all PGCSP specimens.
Original languageEnglish
Publication statusPublished - 2017
EventYRGS2017, The 8th Young Researchers and Graduates Symposium in Structural Engineering and Construction - Tokyo, Japan
Duration: 8 Dec 20178 Dec 2017
http://www.nagai.iis.u-tokyo.ac.jp/YRGS/index.htm

Forum/Symposium

Forum/SymposiumYRGS2017, The 8th Young Researchers and Graduates Symposium in Structural Engineering and Construction
Abbreviated titleYRGS2017
Country/TerritoryJapan
CityTokyo
Period8/12/178/12/17
Internet address

Cite this