GFRP拉挤成型构件徐变性能的试验研究  

Experimental Study on Creep Behavior of Pultruded GFRP Members

作　　者：章伟[1,2] 张明义[1,2] 王传鹏[1,2] 

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]青岛理工大学蓝色经济区工程建设与安全协同创新中心,山东青岛266033

出　　处：《建筑科学》2016年第7期74-77,共4页Building Science

基　　金："十一五"国家科技支撑计划项目资助(2008BAJ06B03-2)

摘　　要：为评价一种新型拉挤型双腹板工字型玻璃纤维复合材料(Glass Fiber Reinforced Polymer,简称GFRP)构件工程徐变特性,利用弹簧反力装置对GFRP构件进行了60d弯曲徐变试验研究。试验研究结果表明,GFRP构件在约为60%材料拉伸强度的应力水平下,徐变速度随时间降低;在持荷15 d内,GFRP构件徐变快速增长,跨中挠度增加了3.5%;至60 d,徐变速度降低到0,跨中挠度增加了5.6%。To evaluate the long-term deformation of a new type of GFRP（ Glass Fibre Reinforced Polymer） beam with pultruded I-section and double webs,the large-tonnage creep behaviors of the GFRP member are tested and studied by using a spring counterforce device. The results show that： under the stress level of 60% of the material tensile strength,the creep rates of the GFRP member decrease with time; during the first 15 days,the creep rates of GFRP member grow rapidly,and the mid-span deflection increases by 3. 5%; at the end of the test,up to 60 days,the creep rates diminish to zero,and the mid-span deflection increases by 5. 6%.

关 键 词：拉挤成型 GFRP 大吨位 徐变特性 稳定状态 

分 类 号：TU317[建筑科学—结构工程]