Structural behavior of FRP grid reinforced geopolymer concrete sandwich wall panels subjected to concentric axial loading
Structural behavior of FRP grid reinforced geopolymer concrete sandwich wall panels subjected to concentric axial loading
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同心轴向荷载作用下FRP网格增强地聚合物混凝土夹芯墙板的结构性能
DOI：
10.1016/j.compstruct.2021.114117
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发表时间：
2021-08
影响因子：
6.3
通讯作者：
Dai Jian-Guo
中科院分区：
文献类型：
--
作者：
Kumar Sushil;Chen Binqi;Xu Yuye;Dai Jian-Guo
研究了一种新型预制混凝土夹芯墙板，该墙板由玄武岩纤维增强聚合物（FRP）增强的地聚合物混凝土夹层和保温层组成，通过中空玻璃管FRP连接件连接。预制了10块夹层墙板，并承受同心轴向载荷。主要测试变量包括墙板的细长比（即，有效高度与总截面厚度之比）、连接器的纵向间距以及壁板的夹层厚度与绝缘层厚度之比。仔细研究了载荷-挠度关系、失效模式和载荷-应变关系。所有的墙板都因混凝土压碎而损坏。连接器承受轴向力、横向剪切和弯曲，以允许两个翼片一起变形。当长细比从8变化到17时，墙板的轴向承载力降低了26%。FRP连接件的间距被发现有边际的轴向承载力的影响，因为在面板的端部的盖梁的存在。在绝热层厚度的增加，同时保持厚度恒定导致在一个显着的上升的情况下，具有较高的细长比的面板的极限轴向载荷。对等效实心墙板的轴向极限荷载进行了二阶理论分析，并与试验结果进行了比较。
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 (i.e., the effective height to total sectional thickness ratio), longitudinal spacing of connectors, and the ratio of the wythe thickness to the insulation layer thickness of the wall panel. The load–deflection relationships, failure modes, and load–strain relationships were carefully investigated. All the wall panels failed by crushing of concrete. The connectors were subjected to axial force, transverse shear and bending in order to allow two wythes to deform together. The axial load capacity of the wall panel was reduced by 26% as the slenderness ratio varied from 8 to 17. 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. An increase in the insulation thickness while keeping the wythe thickness constant resulted in a significant rise in the ultimate axial load in the case of panels having a higher slenderness ratio. A theoretical second-order analysis was performed to predict the ultimate axial load of equivalently assumed solid wall panels, and the predicted results were compared with the experimental ones.
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影响因子：
4.6
作者：
D. Tomlinson;N. Teixeira;A. Fam
通讯作者：
D. Tomlinson;N. Teixeira;A. Fam
影响因子：
1.1
作者：
B. Frankl;G. Lucier;T. Hassan;S. Rizkalla
通讯作者：
B. Frankl;G. Lucier;T. Hassan;S. Rizkalla
影响因子：
7.4
作者：
Amran, Y. H. Mugahed;Ali, A. A. Abang;Safiee, Nor Azizi
通讯作者：
Safiee, Nor Azizi
DOI：
10.14359/8051
发表时间：
1961-02
期刊：
--
影响因子：
--
作者：
A. Mattock;L. Kriz;E. Hognestad
通讯作者：
A. Mattock;L. Kriz;E. Hognestad
影响因子：
1.1
作者：
A. Jawdhari;A. Fam
通讯作者：
A. Jawdhari;A. Fam