缓粘结预应力筋张拉适用期确定方法试验研究  

Determination method for tensioning time limit of retard-bonded prestressed steel strands

作　　者：李佩勋 蒋方新 陈尚志 刘运 李仙花 李梦彦 Li Peixun;Jiang Fangxin;Chen Shangzhi;Liu Yun;Li Xianhua;Li Mengyan(China Academy of Building Research,Beijing 100013,China;China Building Technique Group Co.Ltd,Beijing 100013,China)

机构地区：[1]中国建筑科学研究院有限公司,北京100013 [2]中国建筑技术集团有限公司,北京100013

出　　处：《建筑科学》2022年第1期114-118,共5页Building Science

基　　金：中国建筑科学研究院有限公司基金项目(20181802330730041)。

摘　　要：本文通过对缓粘结预应力筋在其缓凝粘合剂不同稠度下的张拉摩擦损失测定试验,得出了根据缓凝粘合剂稠度确定缓粘结预应力筋张拉适用期的方法,同时得到在张拉适用期内,缓粘结预应力筋摩擦系数与稠度的关系,为工程设计、施工及标准制定提供依据。In this paper, by testing the tension friction loss of retard-bonded prestressed tendons under different consistencies of retarded binder, the method to determine the tension period of Retard-bonded prestressed tendons according to the consistencies of retarded binder is obtained. Meanwhile, the relationship between the friction coefficient and consistencies of retard-bonded prestressed tendons during the tension period is obtained, which provides the basis for engineering design, construction and standard formulation.

关 键 词：缓粘结预应力 缓凝粘合剂 张拉适用期 锥入度 摩擦损失 

分 类 号：TU378[建筑科学—结构工程]