辽宁工程技术大学学报（自然科学版）2017，Vol.36Issue(6)：619-623,5.DOI:10.11956/j.issn.1008-0562.2017.06.011
缓粘结剂固化前后预应力筋应力损失及粘结性能
Stress loss and adhesive properties of retard-bonded PC tendons before and after retard-bonded adhesive cure
摘要
Abstract
To investigate stress loss and adhesive properties of retard-bonded PC tendons before and after retard-bonded adhesive cure,retard-bonded PC tendons' tensile experiments and PC beams' vertical loading experiments were carried out respectively.In the PC tendons' tensile experiments,two PC beams with three straight pre-stressed retard-bonded tendons were tensile and tendon's stress loss were measured.In the PC beams' loading experiment,two PC beams as described above were made and bending capacity of beam and adhesive properties were measured.The experimental result shows that the tensile friction stress loss is small because of weak adhesive properties before retard-bonded adhesive's cure,so it is fit for tensile operation.When it's loading,the stress ofpre-stressed tendons' ends increase by 600Mpa.Because the concrete and tendons can't work together,the bearing capability and ductility are poor.And the tensile friction stress loss is large because of strong adhesive properties after retard-bonded adhesive cure,so it is not fit for tensile operation.When it's loading,the stress of pre-stressed tendons' ends increase by not more than 20Mpa.Because the concrete and tendons work together well,the bearing capability and ductility is significantly improved.关键词
缓粘结剂/固化程度/预应力筋/应力损失/粘结性能/承载能力Key words
retard-bonded agent/adhesive cure/PC steel strand/stress loss/adhesive properties/bearing capability分类
建筑与水利引用本文复制引用
王占飞,胡正伟,曹少朋,马玥..缓粘结剂固化前后预应力筋应力损失及粘结性能[J].辽宁工程技术大学学报（自然科学版）,2017,36(6):619-623,5.基金项目
辽宁省高等学校杰出青年学者成长计划(LJQ2014060) （LJQ2014060）
