摘要
低回缩预应力钢绞线体系是一种新型预应力体系.为了研究新型二次张拉低回缩预应力锚具的锚下构造,设计了采用二次张拉单孔预应力钢绞线锚具的预应力矩形梁试验,将理论计算结果分别与传统夹片式锚具锚下应力场、新型二次张拉低回缩预应力锚具锚下应力场进行对比,发现在张拉过程中三者锚下应力场的变化规律一致.当采用相同型号的锚下垫板时,各截面应力峰值相差很小,且均未超过试验混凝土的强度.因此,二次张拉单孔预应力钢绞线锚具锚下构造可与传统夹片式锚具完全相同.
Low retracting pre-stressing anchorage system （LRPAS） is a new type of post-tensioned pre stressing system. An experimental study was carried out to investigate the structural behavior under the new LRPAS. A scaled test specimen using low retracting pre-stress stranded single anchorage was constructed and tested. Based on the strain measurements, the stress field under the traditional anchorage and the new LRPAS were obtained, and the test results were consistent with the theoretical calculation ones. When the same type of steel plate under the anchorage was used, the maximum stress of the cross-section was similar, and did not exceed the strength of concrete. Therefore, compared with the traditional anchorage, the low retracting pre-stress stranded single anchorage has the same construction under the anchor.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第2期1-5,共5页
Journal of Hunan University:Natural Sciences
基金
广东省交通厅科技项目(2008-15)
关键词
矩形板试验
应力分析
低回缩预应力锚具
锚下构造
峰值应力
test specimens
stress analyses
low retracting pre-stressing anchorage system
construction under anchorage
maximums stress
