潘盛山?覮,乐锐,惠华星,朱禹熹.NiTiNb-SMA丝主动加固RC圆柱抗震性能试验[J].湖南大学学报:自然科学版,2020,(7):93~101
NiTiNb-SMA丝主动加固RC圆柱抗震性能试验
Experimental Study on Seismic Performance of Active Confined RC Piers with NiTiNb-SMA Wires
  
DOI:
中文关键词:  桥墩抗震  NiTiNb-SMA加固  主动约束  被动约束  拟静力试验
英文关键词:seismic pier  NiTiNb-SMA retrofitting  active confinement  passive confinement  pseudo-static experiment
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作者单位
潘盛山?覮,乐锐,惠华星,朱禹熹 (大连理工大学 土木工程学院辽宁 大连 116024) 
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中文摘要:
      为研究国产镍钛铌形状记忆合金(NiTiNb-SMA)丝主动约束加固钢筋混凝土墩柱的抗震性能,完成了3个墩柱试件的拟静力试验. 基于试验现象和水平力-位移曲线,对比分析了各试件的骨架曲线、承载力和延性、强度退化、累计耗能、残余位移等性能指标. 结果表明:热激励NiTiNb-SMA丝能有效地为墩柱提供主动约束应力,减轻墩柱的损伤,并提高墩柱的延性和耗能能力,对比原试件,NiTiNb-SMA丝对试件主动加固后的位移延性系数和累计耗能分别提高了27.8%和10.4%;有效减缓了墩柱的强度衰减,减小了墩柱的残余位移.
英文摘要:
      To investigate the seismic performance of reinforced concrete (RC) piers retrofitted by active confinement of domestic NiTiNb-SMA wires, a pseudo-static test of three column specimens was carried out. Based on the experimental phenomena and lateral force-displacement curves, the skeleton curves, bearing capacity and ductility, strength degradation, cumulative energy dissipation and residual displacement of the specimens were analyzed. The results show that thermal excited NiTiNb-SMA wires can effectively provide active confinement stress for the pier, which reduced the damage and improved the ductility and energy dissipation capacity of piers. Compared with the control specimens, thermal excited SMA wires increased the displacement ductility coefficient and cumulative energy dissipation of the specimen by 27.8% and 10.4%, respectively. What′s more, it effectively reduced the strength degradation and improved the ability of restoring the residual displacement of piers.
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