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玻璃纤维增强塑料(GFRP)筋混凝土梁抗弯性能的研究

, PP. 88-92

Keywords: 桥梁工程,GFRP筋混凝土梁,试验及有限元,抗弯性能,GFRP筋

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Abstract:

通过GFRP筋混凝土梁和普通钢筋混凝土梁的破坏试验,对GFRP筋混凝土梁跨中荷载挠度等受力变形规律进行了试验研究。讨论了GFRP筋混凝土梁有限元建模计算的方法,参照普通钢筋混凝土梁的有限元模型,采用线弹性本构关系模型,对不同配筋率的GFRP筋混凝土抗弯性能进行了计算研究。结果表明,GFRP筋混凝土梁的跨中荷载挠度曲线在混凝土开裂后呈平台状,在配筋率较小的情况下,平台段相对较长;随着配筋率的提高,平台段逐渐缩短;当配筋率增加到一定程度时,平台段完全消失。有限元模型计算得出的荷载-跨中位移曲线和试验梁的相应曲线吻合较好。

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