本文選題：GFRP-混凝土組合梁 + 混凝土收縮徐變��； 參考：《復(fù)合材料學(xué)報(bào)》2016年05期

【摘要】：玻璃纖維增強(qiáng)樹(shù)脂(GFRP)-混凝土組合梁由上部混凝土板和下部GFRP型材以及連接二者的抗剪連接件組成。開(kāi)展了2根GFRP-混凝土組合梁(非預(yù)應(yīng)力及施加體外預(yù)應(yīng)力組合梁各1根)在1年持續(xù)載荷下行為的試驗(yàn)研究�？紤]混凝土收縮徐變及GFRP型材蠕變耦合的影響,開(kāi)展了50年的24根GFRP-混凝土組合梁時(shí)隨有限元參數(shù)分析。結(jié)果表明:在1年持續(xù)載荷下,非預(yù)應(yīng)力與施加體外預(yù)應(yīng)力組合梁長(zhǎng)期撓度分別為其初始撓度的1.42倍及2.91倍;非預(yù)應(yīng)力與預(yù)應(yīng)力組合梁中連接件的長(zhǎng)期滑移分別為0.230mm及0.164mm,相比初始滑移2種組合梁的最終滑移分別增加了53.3%和58.2%;50年后,非預(yù)應(yīng)力組合梁長(zhǎng)期撓度與初始撓度的比值在1.50~1.56之間;而施加體外預(yù)應(yīng)力組合梁長(zhǎng)期撓度與初始撓度的比值在3.03~6.08之間�；谝陨涎芯刻岢隽薌FRP-混凝土組合梁長(zhǎng)期撓度的計(jì)算建議。
[Abstract]:Glass fiber reinforced resin (GFRP)-concrete composite beams are composed of upper concrete slabs, GFRP profiles and shear connectors. The behavior of two GFRP- concrete composite beams (1 unprestressed beam and 1 externally prestressed composite beam) under continuous load for one year was studied. Considering the effect of shrinkage and creep of concrete and creep coupling of GFRP profile, 24 GFRP- concrete composite beams were analyzed with finite element method. The results show that the long-term deflection of unprestressed and externally prestressed composite beams is 1.42 and 2.91 times of its initial deflection respectively under one year continuous load. The long-term slippage of joints in unprestressed and prestressed composite beams is 0.230mm and 0.164mm respectively, which is 53.3% and 58.2% higher than that of initial slippage respectively, and the ratio of long-term deflection to initial deflection of unprestressed composite beams is between 1.50 and 1.56 after 50 years. The ratio of long-term deflection to initial deflection of externally prestressed composite beam is between 3.03 and 6.08. Based on the above research, the calculation suggestion of long-term deflection of GFRP-concrete composite beam is put forward.
【作者單位】： 同濟(jì)大學(xué)建筑工程系;
【基金】：國(guó)家“973”計(jì)劃(2012CB026200)
【分類號(hào)】：TU398.9

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