锈蚀钢筋混凝土梁中钢筋与混凝土间粘结性能退化分析  

Analysis on the Deterioration of Bonding Performance between Concrete and Reinforcement in Corroded Reinforced Concrete Beam

作　　者：杨晓明[1] 孙国君[1] 陈永林[1] 吴天宇[1] 

机构地区：[1]辽宁工程技术大学建筑工程学院,阜新123000

出　　处：《硅酸盐通报》2017年第4期1388-1394,共7页Bulletin of the Chinese Ceramic Society

基　　金：辽宁省教育厅杰出青年学者成长计划(LJQ2013037);辽宁省自然科学基金(20170540414)

摘　　要：钢筋与混凝土之间的粘结强度下降是导致锈蚀钢筋混凝土构件承载力退化的主要原因之一。本文在锈蚀钢筋混凝土梁试验数据的基础上,建立ANSYS有限元模型,其中混凝土采用Solid65单元、钢筋采用Link8单元、钢筋与混凝土之间的粘结作用采用Combin39弹簧单元来模拟。根据试验梁荷载-位移曲线进行模型修正,获得合适的粘结强度退化修正系数,并利用曲线拟合技术得到锈蚀钢筋混凝土梁中钢筋与混凝土粘结强度退化修正公式。该公式能够用于实际锈蚀钢筋混凝土结构承载力的计算以及结构安全评估工作。The deterioration of bonding performance between reinforcement and concrete is one of main reasons for the decrease of load carrying capacity of RC component. Based on the experimental results of corroded RC beam, the finite element models were built by Solid 65, Link8 and Combin39 element in ANSYS and updated according to the curves of load vs. displacement of the test beams. The suitable correction coefficients for deteriorate bonding strength between reinforcement and concrete were obtained from the former work. Finally, the curve fitting on these correction coefficients vs. corrosion ratio was used to obtain the equation for calculating the bonding strength bonding strength in corroded RC beams.The equation can be used to calculate the load carrying capacity of existing concrete structures and their condition assessment.

关 键 词：钢筋锈蚀 钢筋混凝土梁 粘结性能 模型修正 曲线拟合 

分 类 号：TU525[建筑科学—建筑技术科学]