锈蚀钢筋混凝土框架柱滞回性能的数值模拟研究  

Numerical simulation research on hysteresis performance of corroded reinforced concrete frame columns

作　　者：赵桂峰[1] 李瑶亮[1] 张猛[1] 李大望[2] 申家玉 

机构地区：[1]郑州大学土木工程学院,河南郑州450001 [2]广东省滨海土木工程耐久性重点实验室,深圳大学,广东深圳518060

出　　处：《世界地震工程》2014年第2期71-79,共9页World Earthquake Engineering

基　　金：国家自然科学基金项目(51278303);广东省滨海土木工程耐久性重点实验室开放基金项目(GDDCE12-06);河南省教育厅科学技术研究重点项目(13A560672)

摘　　要：以某钢筋混凝土框架柱为例,采用非线性有限元分析软件ABAQUS研究了框架柱在4种不同锈蚀程度(未锈蚀、轻微锈蚀、中等锈蚀和严重锈蚀)下的滞回性能,并与文献中描述的试验结果和框架柱的实际震害进行了对比。研究表明:钢筋锈蚀将导致框架柱的滞回承载力大幅度降低,而且随着锈蚀率的增大,这种承载力降低效应逐渐增强,其中锈蚀引起的钢筋与混凝土之间的粘结性能退化在这种滞回承载力削弱过程中起着重要的作用。就滞回曲线的特点来看,随着钢筋锈蚀程度的增大,框架柱滞回环的饱满程度降低、内缩增加,滞回曲线由弓形逐渐变成反S形,滞回环的包络面积变小,说明框架柱抗震耗能能力降低。A study on the hysteresis performance of reinforced concrete frame columns was carried out. Using-ABAQUS software to establish the nonlinear finite element model, the hysteresis bearing capacities of columns withfour different degree of corrosion （no corrosion,slight corrosion,moderate corrosion and severe corrosion） were com-puted and compared with test results described in literature and actual damage. The results show that, steel corro-sion will lead to a significant reduction in hysteresis bearing capacity of the frame columns, the larger the corrosionrate, the more reduction the hysteresis bearing capacity. In which, the degradation of the bond between steel andconcrete plays an important role on the reduction of the hysteresis bearing capacity of the corroded columns. Thestudy shows also that, there is a gradual change of the hysteresis curves from a bow - shape to an anti - S - shapewith the increase of the corrosion rate, andshows the seismic performance deterioration

关 键 词：锈蚀 钢筋混凝土框架柱 滞回曲线 数值模拟1 

分 类 号：P315[天文地球—地震学] TU375.3[天文地球—固体地球物理学]