混合形状记忆合金和屈曲约束支撑系统自复位抗震研究
发布时间：2018-09-10 08:32
【摘要】：提出混合形状记忆合金(SMA)和屈曲约束支撑(BRB)系统混合自复位装置。在混合自复位装置中,BRB发挥耗能作用,而SMA提供自复位功能以减小结构震后残余变形。据SMA一维宏观唯象本构模型,编制用于ABAQUS有限元分析的用户材料子程序SMA-UMAT;用ABAQUS及子程序SMA-UMAT分别对设置BRB及混合自复位装置钢框架(简称BRBF,SC-BRBF)进行低周反复与动力弹塑性地震反应分析。数值结果表明,虽SC-BRBF峰值层间位移角、峰值基底剪力及峰值楼层加速度较BRBF有一定程度放大,但与BRBF相比,SC-BRBF可减小结构残余位移50%以上。故该混合自复位装置在大跨结构及高烈度抗震设防地区具有一定工程应用前景。
[Abstract]:A hybrid self-reset device for hybrid shape memory alloy (SMA) and buckle-constrained braced (BRB) systems is proposed. BRB plays an energy dissipation role in a hybrid self-reset device, while SMA provides a self-reset function to reduce the residual deformation of the structure after the earthquake. According to SMA's one-dimensional macroscopic phenomenological constitutive model, A user material subroutine SMA-UMAT; for ABAQUS finite element analysis is developed. The low cycle repeated and dynamic elastoplastic seismic response analysis of steel frame with BRB and hybrid self-reset device (BRBF,SC-BRBF) is carried out by ABAQUS and SMA-UMAT respectively. The numerical results show that the residual displacement of the structure can be reduced by more than 50% compared with the BRBF, although the peak displacement angle, the peak basement shear force and the peak floor acceleration of the SC-BRBF are enlarged to some extent than those of the BRBF. Therefore, the hybrid self-reset device has a certain engineering application prospect in large span structure and high intensity seismic fortification area.
【作者单位】： 上海大学土木工程系;
【分类号】：TU352.11;TU313
[Abstract]:A hybrid self-reset device for hybrid shape memory alloy (SMA) and buckle-constrained braced (BRB) systems is proposed. BRB plays an energy dissipation role in a hybrid self-reset device, while SMA provides a self-reset function to reduce the residual deformation of the structure after the earthquake. According to SMA's one-dimensional macroscopic phenomenological constitutive model, A user material subroutine SMA-UMAT; for ABAQUS finite element analysis is developed. The low cycle repeated and dynamic elastoplastic seismic response analysis of steel frame with BRB and hybrid self-reset device (BRBF,SC-BRBF) is carried out by ABAQUS and SMA-UMAT respectively. The numerical results show that the residual displacement of the structure can be reduced by more than 50% compared with the BRBF, although the peak displacement angle, the peak basement shear force and the peak floor acceleration of the SC-BRBF are enlarged to some extent than those of the BRBF. Therefore, the hybrid self-reset device has a certain engineering application prospect in large span structure and high intensity seismic fortification area.
【作者单位】： 上海大学土木工程系;
【分类号】：TU352.11;TU313
【共引文献】
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