本文選題：GFRP筋 + 溫度效應(yīng)��； 參考：《工業(yè)建筑》2017年11期

【摘要】：玻璃纖維復(fù)材(GFRP)筋拉伸性能的溫度效應(yīng)十分明顯,特別是高溫環(huán)境下其性能變化規(guī)律在工程應(yīng)用中需要重點關(guān)注。以GFRP筋直徑、溫度值高低、溫度升高方式和恒溫時間等為變化因素,通過試驗研究溫度效應(yīng)下GFRP筋拉伸力學(xué)性能的變化規(guī)律。研究結(jié)果表明:隨著溫度升高,GFRP筋極限抗拉強度和極限應(yīng)變下降較明顯,而高溫作用對GFRP筋的彈性模量影響較小。高溫下直徑16 mm的GFRP筋的極限抗拉強度和彈性模量比直徑22,25 mm的高。溫度低于240℃的情況下,經(jīng)恒高溫作用后筋體的極限抗拉強度比未經(jīng)恒高溫作用的同溫度下的筋材略有增加,高于240℃后兩種筋材的極限抗拉強度無明顯差異。當(dāng)恒高溫作用時間不超過1 h時,GFRP筋力學(xué)性能較為穩(wěn)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，

本文編號：1955031