新老混凝土粘结试件的受力数值模拟及分析  

Numerical Analysis of Mechanical Performance for Bonding Properties of Fresh and old Concretes

作　　者：谢占宇[1] 胥新伟[2] 

机构地区：[1]包头铁道职业技术学院,内蒙古包头014060 [2]河北工业大学土木工程学院,天津300401

出　　处：《大连交通大学学报》2015年第1期64-67,共4页Journal of Dalian Jiaotong University

摘　　要：基于有限元数值模拟综合对比分析了劈拉极限状态下整体混凝土试块、传统的新老混凝土试块和采用钢筋机械连接的新老混凝土试块的粘结性能,结果表明:在相同条件下,采用钢筋机械连接新老混凝土粘结时,其劈拉强度比传统的不加连接件的新老混凝土粘结试块提高了约20%,而且采用钢筋机械连接件具有显著地抑制劈裂面的裂缝扩展,混凝土中不同位置的劈拉应力的增长与该处到钢筋轴心的距离基本呈线性关系.Based on numerical analysis of Finite element method, comprehensively comparative analysis are carried out to investigate the bonding properties of fresh and old concretes by traditional methods and mechani- cal joint element. The results show that the splitting strength of the fresh and old concretes is enhanced signifi- cantly and increased over 20% than traditional bonding method. Moreover, the mechanical joint element such as steel bars have the function to curb the crack developing. The splitting stresses in the concrete samples is tend to be the linear relations with the distance between axes of steel and location.

关 键 词：粘结性能 新老混凝土粘结 钢筋 有限元 

分 类 号：TU37[建筑科学—结构工程]