GFRP管钢筋混凝土组合构件的徐变性能研究  

Study on Creep Behaviour of GFRP Pipe Reinforced Concrete Flexural Members

作　　者：万江 宋明健 吴耀冬 李萍 温泉 

机构地区：[1]十九冶成都建设有限公司,四川成都610091

出　　处：《水利与建筑工程学报》2015年第6期95-99,共5页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金资助项目(50704012);辽宁省博士启动基金资助项目(20061017)

摘　　要：在长期荷载、温度和混凝土徐变等因素的影响下,GFRP管钢筋混凝土受弯构件会发生内力重分布,改变其受力性能。利用内力平衡,建立GFRP管钢筋混凝土组合截面受压高度、初始应力计算公式及徐变效应影响的计算模型,并编制了GFRP管钢筋混凝土构件的徐变效应计算程序,计算分析了混凝土强度等级、温度、GFRP含量及荷载等主要设计参数对GFRP管钢筋混凝土构件的徐变效应的影响。计算结果表明,GFRP管钢筋混凝土受弯构件的徐变随着含GFRP率的增加而减小,随者弯矩的增加而增大,随着混凝土强度等级的提高而增大,随着温度升高而增加。Under long-term loads and the influence of temperature and concrete creep effect,the GFRP tube reinforced concrete flexural members present a redistribution of stress,and therefore change their mechanical properties. With the theory of internal force equilibrium,the calculation model of GFRP tube reinforced concrete composite section was established considering the influence of compression height,initial stress and creep effect. Then the creep effect calculation procedures of GFRP tube reinforced concrete flexural members were programmed to calculate and analyze the effect of the GFRP content,the concrete strength,load and temperature on the creep effect of the GFRP tube reinforced concrete. The results indicate that the creep of GFRP tube reinforced concrete flexural members decreases with the increase of the GFRP rate,but increases with the increase of the moment,the improvement of the concrete strength and the increase of the temperature.

关 键 词：GFRP管 钢筋混凝土 受弯构件 徐变效应 计算公式 

分 类 号：TU398[建筑科学—结构工程]