玻璃纤维复材筋拉伸性能温度效应试验研究

发布时间：2018-05-30 10:50

  本文选题：GFRP筋 + 温度效应　； 参考：《工业建筑》2017年11期

【摘要】：玻璃纤维复材(GFRP)筋拉伸性能的温度效应十分明显,特别是高温环境下其性能变化规律在工程应用中需要重点关注。以GFRP筋直径、温度值高低、温度升高方式和恒温时间等为变化因素,通过试验研究温度效应下GFRP筋拉伸力学性能的变化规律。研究结果表明:随着温度升高,GFRP筋极限抗拉强度和极限应变下降较明显,而高温作用对GFRP筋的弹性模量影响较小。高温下直径16 mm的GFRP筋的极限抗拉强度和弹性模量比直径22,25 mm的高。温度低于240℃的情况下,经恒高温作用后筋体的极限抗拉强度比未经恒高温作用的同温度下的筋材略有增加,高于240℃后两种筋材的极限抗拉强度无明显差异。当恒高温作用时间不超过1 h时,GFRP筋力学性能较为稳定。
[Abstract]:The temperature effect of tensile properties of glass fiber composite steel bars is very obvious, especially in the high temperature environment. The variation law of tensile mechanical properties of GFRP tendons under temperature effect was studied by taking the diameter of GFRP bars, temperature value, the way of temperature rise and the time of constant temperature as the variable factors. The results show that the ultimate tensile strength and ultimate strain of GFRP tendons decrease obviously with the increase of temperature, but the effect of high temperature on the elastic modulus of GFRP tendons is small. The ultimate tensile strength and elastic modulus of 16mm diameter GFRP tendons at high temperature are higher than those of 2225mm diameter bars. When the temperature is lower than 240 鈩，

本文编号：1955031