自密实混凝土与老混凝土粘结滑移关系的有限元分析  

Finite element analysis of bonding-slip relationship between old concrete and freshly cured self-compacting concrete

作　　者：陈峰[1] 郑建岚[2] 

机构地区：[1]福建江夏学院工程学院,福建福州350108 [2]福州大学土木工程学院,福建福州350108

出　　处：《武汉大学学报（工学版）》2014年第6期774-778,共5页Engineering Journal of Wuhan University

基　　金：国家自然科学基金项目(编号:51278124)

摘　　要：在自密实混凝土与老混凝土粘结滑移试验研究的基础上,采用弹簧单元模拟新老混凝土的粘结面,通过有限元软件ABAQUS进行了新老混凝土考虑粘结滑移的推出试件有限元分析.通过与试验结果的比较,验证了有限元模型的可行性.计算结果表明,加载端的应力最大,是个薄弱环节;加载端处应变最大而自由端处应变最小,其分布规律符合粘结滑移的扩散机理;粘结应力从自由端到加载端是不断增大的,且大部分区段内增长平稳,而在加载端附近则应力变化较为明显;粘结应力在整个粘结长度上的分布接近于指数分布.研究成果可为自密实混凝土加固工程的受力分析提供参考.The bonding-slip behavior of freshly cured self-compacting concrete to old concrete is analyzed with the finite element program ABAQUS,in which the spring element is used to simulate the bonding surface.Compared with the test results,the finite element model is proved to be effective.It is indicated that load side is a weak position in which the stress is maximum.The strain is also maximum in the load side and minimum in the free side,which has conformed to the bonding-slip diffusion mechanism.And the bonding stress grew placidly in most segments but changed obviously near the load side.Distribution of bonding stress on the entire bonding length is close to exponential function.The results can provide a reference for engineering application.

关 键 词：自密实混凝土 粘结滑移 老混凝土 有限元 应力分布 

分 类 号：TU528.1[建筑科学—建筑技术科学]