The structural performance of concrete walls reinforced with pultruded glass fibre-reinforced polymer (GFRP) ribbed plates on either side has been experimentally investigated. The GFRP plates were used as a stay-in-place (SIP) structural formwork replacing internal steel reinforcement. The pultruded flat plates incorporated 51 mm deep T-shape ribs on one side, spaced at 100 mm, which provided interlocking with concrete. Six 3000 × 616 mm panels, either 150 or 200 mm thick, were tested in bending (M), under axial compression (N) and under combined loads to establish the completed (M-N) failure envelope of the wall. The effect of surface treatment of the GFRP forms was also investigated. It resulted in full composite action with no concrete slip, reaching 30% higher flexural strength than untreated panels. The effect of reinforcement ratio was studied by varying wall thickness. In all panel tests, diagonal concrete shear cracking occurred and propagated into a horizontal delamination above the GFRP ribs. Slenderness effect and secondary moments were accounted for in developing the (M-N) interaction curve. Initially, M increased by 25% as N increased from zero to 17% of pure axial strength. Then, M reduced linearly to zero at pure N as concrete crushing occurred when the GFRP compression plate separated from the ribs and buckled outwards at midspan. A simplified design approach is also presented.

已经通过实验研究了在两侧用拉挤玻璃纤维增​​强聚合物 (GFRP) 肋板加固的混凝土墙的结构性能。GFRP 板被用作替代内部钢筋的原位 (SIP) 结构模板。拉挤平板在一侧包含 51 毫米深的 T 形肋，间距为 100 毫米，提供与混凝土的互锁。六块 3000 × 616 毫米的面板，厚度为 150 或 200 毫米，在弯曲 ( M )、轴向压缩 ( N ) 和组合载荷下进行测试，以建立完整的 ( M - N) 墙的破坏包络线。还研究了 GFRP 形式的表面处理效果。它导致完全复合作用，没有混凝土滑移，弯曲强度比未经处理的面板高 30%。通过改变壁厚来研究配筋率的影响。在所有面板测试中，混凝土斜向剪切开裂发生并扩展到 GFRP 肋上方的水平分层。在开发 ( M - N ) 相互作用曲线时考虑了细长效应和次级力矩。最初，随着N从 0 增加到纯轴向强度的 17% ，M增加了 25% 。然后，M在纯N处线性减少到零当 GFRP 受压板与肋骨分离并在跨中向外屈曲时，就会发生混凝土压碎。还介绍了一种简化的设计方法。