Behavior of FRP connector-enabled sandwich geopolymer concrete wall panels subjected to combined axial and flexural loading

Research output: Unpublished conference presentation (presented paper, abstract, poster)AbstractAcademic research

Abstract

Precast concrete sandwich panels (PCSPs), consisting of two reinforced concrete wythes and an insulation layer sandwiched in between, are widely used as exterior wall to provide functional and aesthetic envelop to the buildings. A new type of innovative cost-effective PCSP, with significantly improved durability, environmental friendliness and energy efficiency, was proposed by author’s group. It consisted of basalt FRP reinforced geopolymer concrete wythes connected with hollow tubular glass FRP connectors. The structural behavior of proposed panel was studied, experimentally, under flexural (8 specimens), axial (10 specimens) and combined axial-flexural (6 specimens) loadings. The load-deflection relationships, crack patterns, failure modes and load-strain relationships were obtained. The proposed connector significantly increased the degree of composite action in terms of both stiffness and strength. Specimens subjected to axial and combined axial-flexural loadings failed by crushing of concrete. The failure mode of flexural-loaded specimens was governed by the connector rupture. Experimental axial load-bending moment interaction (N-M) curves were obtained for short and slender sandwich panels and compared with theoretical ones. The ultimate axial load capacity of proposed PCSPs was found to be 15% to 30% lower as compared to theoretical sectional capacity of assumed fully composite panel. With the increase of the eccentricity, such tendency did not exhibit significant enlargement because of the connector effect.
Original languageEnglish
Publication statusPublished - Aug 2019
EventThe Third International Symposium for Emerging Researchers in Composites for Infrastructure, August 05-06, 2019, Wuhan, China - Wuhan, China
Duration: 5 Aug 20196 Aug 2019

Forum/Symposium

Forum/SymposiumThe Third International Symposium for Emerging Researchers in Composites for Infrastructure, August 05-06, 2019, Wuhan, China
Abbreviated titleISERCI 2019
CountryChina
CityWuhan
Period5/08/196/08/19

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