均布荷载作用下碳纤维布加固预应力空心板延性分析  

Ductility analysis of pre-stressed RC hollow core slab strengthened by CFRP under uniform load

作　　者：闫长旺[1,2] 刘曙光[1] 王刚[2] 王猛[1] 王玉清[1] 

机构地区：[1]内蒙古工业大学,内蒙古呼和浩特010062 [2]大连理工大学港口和近海工程国家重点实验室,辽宁大连116024

出　　处：《解放军理工大学学报（自然科学版）》2010年第3期334-338,共5页Journal of PLA University of Science and Technology(Natural Science Edition)

基　　金：教育部创新团队计划资助项目(IRT0518);内蒙古交通厅科技项目(NJ-2006-16)

摘　　要：为了研究碳纤维布加固后预应力空心板延性的变化,进行了7块碳纤维布加固预应力空心板试件在均布荷载作用下的试验,分析了碳纤维布粘贴量和粘贴方式对延性的影响,提出了碳纤维布加固预应力空心板曲率延性系数计算方法。试验结果表明,碳纤维布粘贴量和粘贴方式对位移延性系数影响明显,随着碳纤维布粘贴量的增加,试件位移延性系数减小,单层双幅粘贴方式下,延性系数最大。曲率延性系数计算值与位移延性系数之比在0.82左右,所提出的曲率延性系数计算方法是偏于安全的,具有较高的计算精度。To study the ductility variation of pre-stressed RC hollow core slab strengthened by carbon fiber reinforced plastic（CFRP）,seven specimens were tested under uniformed load.Influences of the bonding forms and the strengthening quantities on the ductility were analyzed,and the calculation analysis method of curvature ductility was presented.Findings suggest that the ductility of pre-stressed RC hollow core slab strengthened by CFRP with different bonding forms and strengthening quantities changes obviously,and that the displacement ductility factor decreases with the increasing of strengthening quantity. Two pieces bonding form of one layer can offer more ductility than the other two bonding forms,and that the ratio of curve ductility factors to the displacement ductility factor is about 0.82,so the calculation values are safe and more accurate.

关 键 词：碳纤维布 预应力空心板 位移延性 曲率延性 计算方法 

分 类 号：TU317[建筑科学—结构工程] TU378.5