钢-混凝土组合结构中SMA连接件抗剪试验  

Research on Shear Resistance Test of SMA Connectors in Steel-concrete Composite Structure

作　　者：孙丽[1] 崔朦朦 崔迪[2] 甘博[1] SUN Li CUI Mengmeng CUI Di GAN Bo(School of Civil Engineering, Shenyang Jianzhu University, Shenyang, China, 110168 Civil Technology and Research and Development Center, Dalian University, Dalian, China, 116622)

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

出　　处：《沈阳建筑大学学报（自然科学版）》2017年第3期402-409,共8页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51378085;51578347);辽宁省教育厅科研项目(L2013465;LT2015023);辽宁省百千万人才工程资助项目(2014921045)

摘　　要：目的将形状记忆合金(SMA)制成螺栓型连接件,应用于钢-混凝土组合结构中,研究不同因素对SMA连接件承载能力的影响.方法采用改进的推出试验方法,从水平力、混凝土强度、SMA连接件的直径、配筋情况4个方面来研究SMA作为连接件的抗剪性能.结果在相同的相对滑移下,SP-2比SP-1的荷载极限值约降低了20%;SMA连接件的直径由6 mm增大为8 mm时,其极限荷载增加了90%,屈服荷载增加了110%;SMA连接件的屈服荷载约为极限荷载的60%,屈服滑移为极限滑移的34%.结论水平力的存在会降低SMA连接件的承载能力;SMA连接件直径对其承载能力的影响极为显著;混凝土强度对SMA连接件承载能力的影响较小;混凝土中是否配筋对SMA连接件的承载能力的影响不明显.同时,应用SMA连接件的试件延性较好,可以应用到实际工程中.To study the mechanical properties of SMA （ Shape Memory Alloy） connectors, the SMA was made into bolt-type connectors and used in the steel-concrete composite structure. The influence of 4 factors on the bearing capacity of SMA connectors, including horizontal force, strength of the concrete, the diameter of SMA connectors and whether the concrete was reinforced were studied by applying an improved method of the push-out test. The result showed that compared with SP-1 ,the limit load of SP-2 was reduced by about 20% under the same relative slip,and when the diameter of the SMA connector was increased from 6 mm to 8 mm, the limit load was increased by 90% and the yield load was increased by up to 110%, moreover, the yield load of SMA connector was about 60% of the limit load and the yield slip was 34% of the limit slip. The conclusion was as follows ： firstly, the existence of horizontal force would reduce the bearing capacity of SMA connectors, then, the influence of the diameter of SMA connectors on bearing capacity was quite sig- nificant ,however, the influence of the strength of concrete was subtle, furthermore, the effect of whether the concrete was reinforced on bearing capacity of SMA connectors was not obvious. At the same time, the SMA connectors had good ductility and could be applied to the practical engineering.

关 键 词：SMA连接件 推出试验 极限荷载 屈服荷载 延性 

分 类 号：TU375.4[建筑科学—结构工程]