摘要
预应力锚索结构广泛应用于边坡与基坑工程，其弹性模量的测定对工程安全性起着至关重要的作用。结合预应力锚索的施工工艺，探讨多束钢绞线在预应力锚索施工过程中的工程等效弹性模量。利用微机静载锚固试验系统，通过室内试验，进行了不同束数（2～6束）钢绞线应力应变关系的测定分析，结果表明：不预张拉下钢绞线的弹性模量一般低于预张拉下的弹性模量；随着钢绞线束数的增加，其弹性模量呈线性衰减规律。研究成果对预应力锚索设计及验收均有较强的理论与工程指导意义。
The prestressed anchor structure is widely used in the excavation and slope engineering,and its elastic modulus plays a very important role in engineering safety.Combined with the construction technology of prestressed anchor,the engineering equivalent elastic modulus of multi-beam steel strand is investigated.The stress-strain relationship of different bundle strands （2~6 bundle）is measured and analyzed using test system of static load an-chorage in laboratory.The results show that the elastic modulus of steel strand under the condition of non-preten-tion is lower than that after pretention and the law of linear attenuation is followed with the increase of the number of bundle.It will provide a great guiding significance for anchorage cable design and acceptance.
出处
《昆明理工大学学报（自然科学版）》
CAS
北大核心
2014年第2期34-38,共5页
Journal of Kunming University of Science and Technology(Natural Science)
基金
国家自然科学基金青年基金(51108217)
云南省应用基础研究计划项目(KKSY201006009)
云南省自然科学基金项目资助(2008ZC027M)
云南省城市地下空间工程专业科研及实验平台建设(KKSY201006009)
关键词
钢绞线
预应力锚索
等效弹性模量
预张拉
试验
steel strand
prestressed anchor
equivalent elastic modulus
pretention
experiment
