摘要
为了研究CFRP-PCPs复合筋的延性,根据CFRP-PCPs复合筋混凝土梁中各组成材料的力学性能,推出了CFRP-PCPs复合筋混凝土梁曲率延性系数的计算方法。通过5根CFRP-PCPs复合筋混凝土梁在低周反复荷载作用下的抗弯试验得出曲率延性系数计算公式,曲率延性系数计算值和实测值比值的平均值为0.97,计算误差在5%以内,结果显示有良好的适用性。试件PB3的延性系数7.46大于试件PB4的5.97和试件PB6的延性系数7.34表明,张拉控制应力的提高和加大CFRP-PCPs复合筋的截面尺寸对CFRP-PCPs复合筋混凝土梁的延性性能有不利影响。
In order to study the ductility of CFRP-PCPs composite tendons,according to the mechanical properties of materials use in the concrete beams reinforced by CFRP-PCPs composite tendons,a method to calculate the curvature ductility of the concrete beams was derived.Five concrete beams reinforced by CFRP-PCPs composite tendons were subjected to cyclic loading in bending tests.The test results show that the increase of pre-stressed level and sectional dimension of the CFRP-PCPs composite tendons has an adverse effect on the ductility of the specimens,and the average ratio of the calculated and experimental ductility is 0.97,with a calculation error of less than5%.Ductility coefficient of Specimen PB3 7.46 is larger than that of Specimen PB4,5.97 and that of PB6 7.34.
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2015年第1期36-42,共7页
Journal of Guangxi University（Natural Science Edition）
基金
国家自然科学基金资助项目(51168006
51108099)
广西自然科学基金青年项目(2012GXNSFBA053159)
