【摘要】 研究了黏结式锚具的改进方案,对改进后的锚具进行了静载张拉试验,阐述改进型CFRP筋黏结式锚具静载试验方案和主要步骤.长度为180 mm的改进式锚具可锚固单根8 mm CFRP筋,极限拉力为115 k N;长度为280 mm的直筒式锚具可锚固单根8 mm CFRP筋,极限拉力为119 k N.改进型CFRP筋黏结式锚具静载试验表明:改进方案是有效可行的.并对黏结应力的测试方法和计算方法进行了探讨,以筋材轴力为指标,对黏结应力测试数据进行检算,当应变片间距适当时,直接在CFRP筋表面黏贴应变片,通过测点应变分析黏结应力分布的方法是可行的.在此基础上得到的试验数据经公式计算,在加载过程中误差较大,最大误差为7.20%;在极限荷载下无误差.更多还原

【Abstract】 The improved program of bonded anchor was investigated,and the static tension test with anchor was conducted. The main steps and programs of the static tension test were introduced. The improved anchors with length of 180 mm could anchor 8 mm CFRP tendon effectively with corresponding ultimate tensile stress of 115 k N. The straight type anchors with length of 280 mm could anchor 8 mm CFRP tendon effectively with corresponding ultimate tensile stress of 119 k N. The static experimental results show that the improved scheme is feasible and effective. The testing and calculation methods of bond stress were introduced. The checking results show that the bond stress distribution curve is consistent with experimental result. Pasting strain gauge on the surface of CFRP tendon directly with suitable distance,the method of analyzing the distribution of bond stress by measuring points strain is feasible to calculate the corresponding experimental data by formula. In the loading process,the error is obvious with the maximum error of 7. 20%,while without error under ultimate load.更多还原