槽形面高温下HPFL加固RC偏压柱抗火性能研究  

Fire Resistance of HPFL Strengthening RC Bias Column under Grooved Surface High Temperature

作　　者：汤繁华[1] 蒋隆敏[1] 熊洪波[1] 

机构地区：[1]湖南工业大学土木工程学院,湖南株洲412007

出　　处：《建筑科学》2014年第11期34-39,共6页Building Science

基　　金：湖南省教育厅项目(12C0093);湖南工业大学校级教改项目(2012C13)

摘　　要：对高性能水泥复合砂浆钢筋网薄层(HPFL)加固的钢筋混凝土(RC)偏压柱在槽型面高温和初始荷载共同作用下进行恒载升温、恒载恒温和恒载降温等高温过程试验。试验结果表明:当初始荷载作用在高温侧时,试验柱跨中挠度凸向低温面;当初始荷载作用在低温侧时,大偏压柱跨中挠度凸向高温面,而小偏压柱的跨中挠度凸向低温面;试验柱在高温过程中均无轴向变形;初始荷载和HPFL加固层能显著提高高温后试验柱的剩余承载力;高温后试验柱的延性明显降低。The experiments on high temperature process of HPFL strengthening RC bias column are undertaken with grooved surface heating and initial load, in the conditions of heating-up with constant load, constant temperature with constant load and cooling down with constant load. The experiments show that, the middle span deflection of the experimental column will bulge out over the low temperature surface when initial loading position is at the high temperature surface; the middle span deflection of big bias column will bulge out over the high temperature surface when initial loading position is at the low temperature surface, while the small bias column will bulge out over the low temperature surface; no axial compression deformation happens to the experimental column during the high temperature; the initial load and HPFL strengthening layer can significantly improve the surplus bearing capacity of the experimental column during high temperature. The ductility of the experimental column will dramatically decrease after the high temperature experiment.

关 键 词：HPFL加固RC偏压柱 槽形面高温 初始荷载 变形 剩余承载力 

分 类 号：TU317.1[建筑科学—结构工程]