预应力筋与沥青基材料的黏结性能研究  

Study on bond properties between prestressing steel and bitumen-based materials

作　　者：周勇政[1] 朱尔玉[1] 潘卫兵[1] 郭占明[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《水利学报》2015年第8期989-998,共10页Journal of Hydraulic Engineering

基　　金：铁道部科技研究开发计划子课题(2012G002-5);高等学校博士学科点专项科研基金(20110009110016)

摘　　要：预应力筋与沥青基材料的黏结性能研究对采用沥青基材料灌浆的后张预应力结构具有重要的意义。以沥青基材料为研究对象,建立计算模型,在沥青基材料黏弹性本构关系的基础上,推导出预应力筋-沥青基材料黏结受力理论解。通过该理论解,得到钢绞线、钢绞线-基体界面以及沥青基材料基体等的应力分布特征。探讨了施加荷载、预应力筋与基体的半径比、沥青基材料温度以及荷载施加时间等因素对预应力筋-沥青基材料之间黏结性能的影响规律。通过与已有成果的对比,验证了本文所推导公式的正确性。本文的研究结果,可为采用沥青基材料灌浆的后张预应力结构的设计计算提供理论依据。The study on bond properties between prestressing steel and bitumen-based materials is of importance for post-tensioning structures grouted with bitumen-based materials. A bond model is established. Formulas for bond properties between prestressing steel and bitumen-based materials are deduced based on the viscoelasticity constitutive relation. The stress distribution characteristics for prestressing strands, strands/matrix, matrix of bitumen-based materials can be obtained by these formulas. The influence of factors including load, strands/matrix radius ratio, temperature and loading time on the bond properties are discussed. The formulas are calibrated by use of the current theory. The research results presented in paper provide theoretical basis for the design and calculation of post-tensioning structures.

关 键 词：预应力结构 沥青基材料 灌浆 黏结性能 

分 类 号：TV332[水利工程—水工结构工程]