预应力环箍加固烟囱的应用与测试  

Application and Testing Research of Prestressed Hoop Strengthening Chimney

作　　者：易贤仁[1] 刘禹钦[1] 杨绪佐[2] 

机构地区：[1]武汉理工大学理学院,武汉430070 [2]中南电力设计院,武汉430071

出　　处：《武汉理工大学学报》2006年第12期106-108,140,共4页Journal of Wuhan University of Technology

摘　　要：在钢筋混凝土烟囱裂缝加固工程中采用了无粘结钢绞线预应力环箍,对加固过程进行了现场测试,经预应力环箍加固后的烟囱筒壁中建立的环向压应力在环箍处最大,其值约-1.0 MPa,环向压应力衰减较快。在1.5 m处,已降至约-0.2 MPa。这种加固方法能有效地控制已有纵向裂缝的开展并能防止新的裂缝产生。The project of strengthening flawed concrete chimney uses unboundodly prestressed strand hoop. Scene measurement of strengthening process shows the maximum of circumferential compression stress produced by chimney wall＇ s concrete can reach the value of 1.0 MPa, and create an obvious stress gradient, the value is - 0.2 MPa in the area of 1.5 m. This method of strengthening can make an effective control of extending of existing lengthways crack and prevent the creation of new crack.

关 键 词：钢筋混凝土烟囱 加固 预应力环箍 现场测试 环向压应力 

分 类 号：TU973[建筑科学—结构工程]