形状记忆合金线材与混凝土的粘结滑移性能试验研究  

Experimental study on bond-slip behavior between shape memory alloy wires and concrete

作　　者：崔迪[1] 武海波 张威 崔朦朦 

机构地区：[1]大连大学土木工程技术研究与开发中心,辽宁大连116622 [2]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《世界地震工程》2017年第3期87-94,共8页World Earthquake Engineering

基　　金：国家自然科学基金项目(51378085;51008040);辽宁省博士科研启动基金(20170520299);辽宁省教育厅科研项目(L2013465)

摘　　要：为了研究SMA线材与混凝土之间的粘结性能,将SMA绞线和光滑SMA丝分别埋入到混凝土立方体中,制成两类SMA线材拉拔试件。采用轴心拉拔试验对两类拉拔试件的力学性能进行测试,分析了两类试件的破坏模式和受力过程,并考虑了混凝土强度对试件粘结性能的影响。此外,还对两类试件的粘结强度和滑移值进行了对比。结果表明:光滑SMA丝拉拔试件的粘结强度非常低,且混凝土强度对该类拉拔试件的粘结性能几乎没有影响。而SMA绞线拉拔试件的粘结强度要远高于光滑SMA丝拉拔试件的粘结强度;随着混凝土强度的增大,此类试件所能承受的拉拔力和滑移值均增大。因此,光滑SMA丝不适合与混凝土共同工作;在混凝土结构中使用SMA线材时,宜采用SMA绞线。The bond behavior between shape memory alloy （SMA） wires and concrete determines whether SMA wires and concrete can work together, thus two kinds of pullout specimens were made by embedding two kinds of SMA wires into concrete cubes--pullout specimens with ordinary SMA wire （specimen SW） and pullout specimens with SMA strands （specimen SS）. The axial pullout test was carried out to test the specimens. The failure modes and the loading process were analyzed. Meanwhile, the influence of concrete strength on bond-slip behavior was considered. Besides, the bond strength and the slip were compared between two kinds of pullout specimens. The results show that, for specimen SW, the bonding strength of them is very low and the concrete strength make little influence on the bond-slip behavior. For specimen SS, the bond-slip behavior is much better than that of specimen SS ; the bond strength and the slip increase with the increasing of concrete strength. Therefore, ordinary SMA wires are not suitable for working with concrete. It will be better if SMA strands are adopted in concrete structure.

关 键 词：形状记忆合金 绞线 混凝土 拉拔试验 粘结滑移性能 

分 类 号：P315.9[天文地球—地震学]