体外预应力加固的关键技术  

Key Technologies of External Prestessed Strengthening

作　　者：黄民元[1] 

机构地区：[1]中南林业科技大学土木工程与力学学院,湖南长沙410004

出　　处：《工程抗震与加固改造》2011年第4期101-104,共4页Earthquake Resistant Engineering and Retrofitting

基　　金：湖南省教育厅科学研究项目(05C339)

摘　　要：建立Ansys有限元模型,对体外预应力加固的关键技术进行研究,为结构加固提供有利的工程指导,主要结论如下:体外力筋面积参数的合理选取,是增强结构承载能力及延性性能的关键。同时,力筋面积的确定应结合工程的空间条件,保证加固结构在受力效果上呈现均匀性;提出了力筋作用位置"低锚位、高适应"的加固原则。预应力筋的锚固,尽可能靠近结构受拉侧的下缘,并限制在局部上的锚固高度,以获得足够的能量储备等等,并提出了一些具有参考性的建议。ANSYS finite element model is established,the key technologies of the external prestressed strengthening are studied,and the favorable engineering guidance is proposed for structural reinforcement.The main conclusion are as follows： the reasonable selection of external tendon＇s area parameter is the key to enhance carrying capacity and structural ductility;at the same time,the determination of tendon area must combine with construction space condition,which must ensure that the reinforcement structure present uniformity in the stress effect;the ＂low anchor position,high adaptation＂ is proposed about acting location of external tendon,and the anchoring arrangement of tendon in vitro is closing to the structure tension side of lower edge and limit on partial anchor altitude which will obtain enough energy reserves to the structure etc.Some referential suggestions are proposed.

关 键 词：体外预应力加固 力筋面积 锚固布置 低锚位 高适应 能量储备 

分 类 号：TU746.3[建筑科学—建筑技术科学]