嵌入式张拉技术下预应力碳纤维布张拉控制应力研究  

The study of carbon fibre cloth controlled straining stress under the embedding straining technique

作　　者：姚锦文[1,2] 李青松[2] 

机构地区：[1]南京航空航天大学航空宇航学院土木系,江苏南京210016 [2]淮海工学院土木工程学院,江苏连云港222005

出　　处：《四川建筑科学研究》2010年第4期28-30,共3页Sichuan Building Science

基　　金：浙江省交通厅科技计划项目(2008H01)

摘　　要：嵌入式张拉技术是一种全新的先锚固后张拉方法,能对碳纤维布进行可靠的锚固和均匀稳定的高应力水平张拉。结合预应力碳纤维布在嵌入式张拉技术下的受力特点、材料特性、预应力损失情况及加固后构件的延性要求,对嵌入式张拉技术下的碳纤维布张拉控制应力进行了试验研究和分析。结果表明,采用嵌入式张拉技术的碳纤维布张拉控制应力上限值取0.40ftpk,可以保证建立有效应力且张拉过程中不出现破坏,同时,被加固构件截面破坏时,具有充分的延性。Embedding straining technique is a new method of carbon fibre cloth straining,by straining the material embeddingly after it has been anchored,it can provide the carbon fibre cloth dependable anchor,high and steady straining stress.This text has studied the carbon fibre cloth＇s mechanical and materials attribute,the losses of prestress,and the ductile of structures strengthened by carbon fibre clothes and then analyzed the materials＇ control tensile stress.As a result,the carbon fibre cloth can be stained to 40 percent of its strength,which can provide sufficient stress and avoid breaking the material.At the same time,the strengthened structure gets adequate ductility.

关 键 词：碳纤维布 预应力 控制应力 嵌入式张拉 

分 类 号：TU528.582[建筑科学—建筑技术科学]