Direct shear tests of glass fiber reinforced polymer connectors for use in precast concrete sandwich panels

2019 ◽  
Vol 207 ◽  
pp. 136-147 ◽  
Author(s):  
Jun-Qi Huang ◽  
Jian-Guo Dai
Keyword(s):  
Glass Fiber ◽  
Precast Concrete ◽  
Sandwich Panels ◽  
Fiber Reinforced Polymer ◽  
Direct Shear ◽  
Glass Fiber Reinforced Polymer ◽  
Shear Tests ◽  
Direct Shear Tests ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced

scholarly journals Experimental Study of Structural Performance of Precast Concrete Insulated Sandwich Panels with Cruciform Cross Section GFRP Connectors

2019 ◽  
Vol 303 ◽  
pp. 01004
Author(s):  
Xiaohong Yang ◽  
Yu Jiang ◽  
Huyue Sun ◽  
Zhenghua Sun
Keyword(s):  
Cross Section ◽  
Precast Concrete ◽  
Sandwich Panels ◽  
Fiber Reinforced Polymer ◽  
Structural Performance ◽  
Shear Tests ◽  
Reinforced Polymer ◽  
Tension Load ◽  
Glass Fiber Reinforced ◽  
Ultimate Tension Load

This study investigated the structural performance of precast concrete insulated sandwich panels with cruciform cross section glass fiber-reinforced polymer (GFRP) connectors, based on tensile and shear tests. 5 tensile specimens and 4 shear specimens were fabricated and tested. The load-displacement relation and failure mode of the specimens were analyzed. The results revealed that the average ultimate tension load of the tested specimens with single GFRP connector was 13.14kN with concrete splitting or concrete partial cone failure. For the shear specimens, the average ultimate shear load was 14.83kN with rupture failure of GFRP connector. Furthermore, durability of sandwich panels was investigated, by fabricating and testing 48 tensile specimens with GFRP connectors immersed in tension load had sufficient safety in different design situations.

Experimental evaluation of precast concrete sandwich wall panels with steel–glass fiber–reinforced polymer shear connectors

2017 ◽  
Vol 20 (10) ◽  
pp. 1476-1492 ◽  
Author(s):  
Qing Zhi ◽  
Zhengxing Guo
Keyword(s):  
Glass Fiber ◽  
Sandwich Panels ◽  
Fiber Reinforced Polymer ◽  
Shear Connector ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced Polymer ◽  
Composite Action ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Steel Truss

A new shear connector is proposed in this article. The shear connector is made of steel–glass fiber–reinforced polymer material. Twelve full-scale precast insulated concrete sandwich panels were tested under flexure to analyze their flexural behavior subjected to pressure. The test program was composed of eight sandwich panels with steel–glass fiber–reinforced polymer connectors and four panels for comparison that were panels using stainless steel truss connectors, pure glass fiber–reinforced polymer pin connectors, and no connectors, respectively. Their load–deflection relationships, load–slip relationships, concrete strain profiles along the wythes cross section, as well as the strains in the steel–glass fiber–reinforced polymer W-shaped connectors were investigated in this article. The panels exhibited a composite action in terms of strength exceeding 85% with steel–glass fiber–reinforced polymer connectors and 40 mm insulation thickness. In addition, the other panels with more than 40 mm insulation layer and different diameter connectors only exhibited 26%–62% composite action. When evaluating the degree of the composite action in terms of stiffness, all sandwich panel values ranged from 6% to 26%. But the compared specimens with pure glass fiber–reinforced polymer connector and smaller diameter steel truss connector had lower level composite action less than 10%. Reasonable design of steel–glass fiber–reinforced polymer W-shaped connectors may provide high composite action for panels and prevent the strength from dropping rapidly due to the steel inner core in the connectors.

Connection development and in-plane response of glass fiber reinforced polymer sandwich panels with reinforced cores

2013 ◽  
Vol 40 (11) ◽  
pp. 1117-1126 ◽  
Author(s):  
Mina Dawood ◽  
Leo Peirick
Keyword(s):  
Glass Fiber ◽  
Sandwich Panels ◽  
Fiber Reinforced Polymer ◽  
Foam Core ◽  
Loading Conditions ◽  
Fiber Reinforced ◽  
Bolted Connections ◽  
Glass Fiber Reinforced Polymer ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced

This paper presents the findings of an experimental research project that was conducted in two phases to study the behavior of glass fiber reinforced polymer (GFRP) sandwich panels with reinforced cores under in-plane loading conditions. The tested panels consisted of two GFRP face skins separated by a polymeric foam core. The foam core was reinforced with different configurations of through-thickness fiber insertions and through-thickness GFRP web skins. In the first phase the performance of three different types of structural connections was tested — namely, bolted, bonded, and so-called enhanced bolted connections. The findings indicate that bolted connections to thinner and more flexible panels exhibited lower strength and a higher degree of nonlinear behavior compared with the bonded connections to the same panels. In contrast, the bolted connections to thicker and stiffer panels were generally stronger and stiffer than their bonded counterparts. The findings further indicate that the ultimate strength of the connections can be increased by up to 26% by bonding a steel reinforcing plate to the face skins of the panel prior to bolting. In the second phase three full-scale sandwich panels (1400 mm × 1400 mm) with different panel configurations were tested under proportional, biaxial, in-plane loading. The applied loads were selected to simulate the in-plane loading conditions in sandwich panels that are subjected primarily to in-plane loads, such as webs of deep beams and shear walls in lightweight structures. The full-field strains and displacements of the panels were measured using a digital image correlation-based (DIC) non-contact measurement system. The findings indicate that the through-thickness core reinforcements effectively prevented localized buckling, debonding, and separation of the panels’ face skins. The findings also demonstrated that slender panels exhibit shear–compression buckling failures, whereas less slender panels exhibit shear–tension rupture failures.

scholarly journals Increasing flexural performance of hybrid sandwich panels by using strain hardening cementitious base composite and glass fiber-reinforced polymer

2018 ◽  
Vol 53 (1) ◽  
pp. 19-31 ◽  
Author(s):  
Hassan Abdolpour ◽  
Julio Garzón-Roca ◽  
Pouya HMH Mameghani
Keyword(s):  
Glass Fiber ◽  
Strain Hardening ◽  
Sandwich Panels ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced Polymer ◽  
Flexural Performance ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Base Composite

The present paper explores different techniques for increasing flexural performance of composite sandwich panels made of hand-layup glass fiber reinforced polymer skins and low density closed cell polyurethane foam core. An experimental program compares the performance of simple panels face to the use of transversal and longitudinal internal glass fiber reinforced polymer ribs and the installation of a strain hardening cementitious base composite top layer over the panels. Based on the experimental results, finite element models are also developed to simulate the flexural behavior of tested panels and conducted an in depth analysis of the techniques studied. Obtained experimental and numerical results show that the use of internal glass fiber reinforced polymer ribs (especially in longitudinal direction) along with the use of strain hardening cementitious base composite significantly and effectively increases the flexural performance of sandwich panels. The high stiffness to weight ratio capacity of the panels attained by applying the proposed method enables its use in rehabilitation of historical places. Furthermore, the proposed techniques could be helpful for strengthening available composite sandwich panels.

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