先张法预应力钢绞线锚固长度试验研究  

Experimental study on anchorage length of pretensioned prestressing steel strand

作　　者：李晓芬[1] 刘立新[2] 张慧鹏[2] 

机构地区：[1]中原工学院建筑工程学院,郑州450007 [2]郑州大学土木工程学院,郑州450001

出　　处：《建筑结构》2015年第15期102-105,92,共5页Building Structure

基　　金：国家自然科学基金资助项目(50578148);河南省交通厅资助项目(2005P338)

摘　　要：为研究疲劳荷载作用下先张法预应力钢绞线的锚固长度,对3根梁式锚固试件进行了疲劳荷载作用下的疲劳试验。根据疲劳后静载试验时钢绞线的应力-应变和粘结应力,分析了钢绞线的粘结锚固机理;对比中国规范、美国规范和欧洲规范中钢绞线锚固长度得出,中国规范中钢铰线的锚固长度具有较大的安全储备,且大于美国规范和欧洲规范中钢绞线的锚固长度。To study the anchorage length of the pretensioned prestressing steel strand under the fatigue load, fatigue tests were carried out on 3 beam-type anchorage specimens. According to the stress-strain and bond stress of the steel obtained in the post-fatigue static load tests, the bonding anchorage mechanism of the steel strand was analyzed. The comparisons of the anchorage length of the steel strand in Chinese, European and American standards were progressed, and results show that the anchorage length of the steel strand in Chinese standards is the longest with large safety reserve.

关 键 词：预应力 锚固 拉拔试验 钢绞线 滑移 

分 类 号：TU378.8[建筑科学—结构工程]