期刊论文

中文

建筑结构学报

1000-6869

2022

43

6

275-283

10.14006/j.jzjgxb.2020.0577

国家自然科学基金项目（51551801）；

本校为第一机构

为研究氯盐环境与荷载耦合作用下钢筋混凝土柱的徐变效应,在持荷与氯盐腐蚀环境下,对18根早龄期与标准龄期钢筋混凝土柱进行了 202 d的长期试验,钢筋锈蚀率分别为0％、10％、20％,测试了早龄期混凝土柱在轴压、小偏压、大偏压三种受力状态下的徐变行为,并与相同条件下标准龄期混凝土柱的徐变行为进行了对比.结果表明:钢筋锈蚀率为10％时,锈蚀RC柱的徐变系数略低于未锈蚀RC柱的;钢筋锈蚀率为20％时,锈蚀RC柱的早期徐变系数偏低,而后期徐变系数出现较快且持续的增长;受混凝土黏性流动和钢筋锈蚀影响,早龄期RC柱的徐变系数低于理论值.根据钢筋实际锈蚀状况,拟合了钢筋锈蚀率分布函数,并通过黏结退化...

Long-term tests of 202 days were performed on 18 early-age or standard-age reinforced concrete columns to investigate the creep effect of reinforced concrete columns under the coupled action of chloride environment and load. The percentage of corrosion of reinforcing bars are 0%, 10%, and 20%, respectively. In addition, the creep of early-age concrete columns under axial, small, and large eccentric compression was tested, and the measured data are compared to that of standard-age concrete columns. The results show that the creep coefficients of...