同济大学学报（自然科学版）2012，Vol.40Issue(12)：1760-1765,6.DOI:10.3969/j.issn.0253-374x.2012.12.003
预张拉纤维布约束混凝土圆柱预应力损失试验
Experimental Research on Pre-stress Loss of Concrete Circular Columns Confined with Post-tensioned FRP
摘要
Abstract
A new self-locking anchor (SLA) is proposed in order to apply the lateral pre-stress to the concrete columns. By using this device, the lateral fiber reinforced polymer (FRP) sheets can be post-tensioned effectively so that the core concrete can be actively confined. Then the strength and ductility of concrete columns can be highly enhanced and strengthened with lateral pre-stressed FRP sheets, and the strength of FRP can be fully used. According to the construction process of SLA, the major reason for the lateral pre-stress loss is analyzed. Based on the experimental research and theory analysis, including the friction loss, carbon fiber reinforced polymer (CFRP) relaxation loss, concrete creep loss and other factors, various discipline and related relationship are found. Finally, proposals to reduce the lateral pre-stress loss are put forward.关键词
预应力损失/预张拉纤维布/混凝土墩柱/自锁式锚具/主动约束Key words
pre-stress loss/pre-tensioned fiber reinforced polymer/concrete column/self-locking anchor system (SLA)/active confinement分类
建筑与水利引用本文复制引用
周长东,李季,吕西林..预张拉纤维布约束混凝土圆柱预应力损失试验[J].同济大学学报（自然科学版）,2012,40(12):1760-1765,6.基金项目
国家自然科学基金面上项目(50978021) （50978021）
同济大学土木工程防灾国家重点实验室开放基金(SLDRCE08-MB-01) （SLDRCE08-MB-01）
中央高校基本科研业务费专项基金(2011JBM080) （2011JBM080）
