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超弹性形状记忆合金(SE SMA)是一种特殊的金属材料,能够承受大变形,当外力撤去后能够恢复到施加外力前的形状。为预测其作为钢筋在梁、柱塑性铰区使用时结构的抗震性能,通过试验研究分析SE SMA钢筋混凝土构件的塑性铰长度、裂缝宽度、裂缝间距、粘结～滑移关系及节点剪应力,并检验现有钢筋混凝土构件计算方法的适用性;同时采用有限元法进一步分析结构的性能。结果表明:采用Paulay公式预测塑性铰长度较合适;欧洲规范-2预测的平均裂缝间距和最大裂缝宽度较准确;有限元预测的荷载～位移、弯矩～转角关系和能量耗散能力与试验结果吻合良好。为促进SMA作为混凝土配筋的广泛应用,还需继续开展相关研究工作。
SE SMA is a special metal material that withstands large deformations and recovers to its pre-applied shape when external forces are removed. In order to predict the seismic performance of the structure when the steel bar is used as a hinge in the beam and column hinge region, the plastic hinge length, crack width, crack spacing, bond-slip relationship and node shear stress of SE SMA reinforced concrete members are analyzed through experimental studies. And verify the applicability of the existing calculation methods of reinforced concrete members; meanwhile, the finite element method is used to further analyze the structural performance. The results show that the Paulay formula is suitable for predicting the length of plastic hinge; the average crack spacing and the maximum crack width predicted by the European Norms-2 are more accurate; the load-displacement, moment-angle relationship and energy dissipation capacity predicted by the FEM are consistent with the experimental results Good fit. In order to promote the wide application of SMA as reinforced concrete, research work needs to be continued.