GFRP抗浮锚杆在基础底板中的锚固性能现场试验研究  

Field test on anchorage performance of GFRP anti-floating anchors in foundation slab

作　　者：朱磊[1] 张明义[1,2] 白晓宇[1,2] 王永洪[1] 赵天杨[1] 

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]青岛理工大学蓝色经济区工程建设与安全协同创新中心,山东青岛266033

出　　处：《土木建筑与环境工程》2017年第2期107-114,共8页Journal of Civil,Architectural & Environment Engineering

基　　金：国家自然科学基金(51278261);山东省自然科学基金(ZR2016EEQ08);山东省高等学校科技计划(J16LG02);青岛市应用基础研究计划(16-5-1-39-jch)~~

摘　　要：通过现场拉拔破坏性试验,测得不同直径的GFRP抗浮锚杆在基础底板内的极限承载力和滑移量,并与实际工程中不同形式的钢筋抗浮锚杆作比较,分析其承载性能和粘结特性。研究表明,在相同的混凝土强度与养护条件下,相同直径的GFRP抗浮锚杆的极限承载力、平均粘结强度与钢筋抗浮锚杆相比较高,且GFRP抗浮锚杆的变形能够满足实际工程需求,充分验证了GFRP材料用作抗浮锚杆的先进性与合理性。基于试验结果与理论分析,给出了GFRP抗浮锚杆与基础底板的最佳锚固面积,并提出了计算公式。Through spot pull-out destructive test, ultimate bearing capacity and slippage in the foundation slab of GFRP anti-floating anchors with different diameter were monitored. Compared with some kinds of steel anti-floating anchors in the actual engineering, their bearing performance and bond behavior were analyzed. The results showed that under the same strength and curing condition of the concrete, ultimate bearing capacity of GFRP anti-floating anchor was larger than steel anti-floating anchor with same diameter, the average bond strength between GFRP anti-floating anchor and foundation slab was higher than the steel anti-floating anchor, moreover the deformation of GFRP anti-floating anchor can meet the engineering requirements, all of those fully verify that GFRP material as an anti-floating anchor was advanced and reasonable. Based on the experimental results and theoretical analysis, the best anchoringarea between GFRP anchor and foundation slab was determined, the computational formula was proposed.

关 键 词：GFRP抗浮锚杆 承载力 锚固性能 最佳锚固面积 平均粘结强度 

分 类 号：TU470[建筑科学—结构工程]