地震激励下形状记忆合金阻尼器在结构被动控制中的应用
|
摘要
在阻尼器中应用不同的形状记忆合金材料,使结构具有有效的耗能及恢复能力。采用不同方法,将4个阻尼系统应用到抗震结构系统当中。利用改进的破坏指示器对结构系统性能进行评测对比。结构损伤、非结构性损伤和系统中其他部件的永久变形在不同的地面加速度时程中都予以考虑。结果表明,甚至在剧烈地面运动之后,SMA阻尼器在减少残余变形方面仍然非常有效。
Different crystallographic phases of shape memory alloy (SMA) materials were used in a damper in order to produce an effective behavior device capable of dissipating energy, while containing the recentering capability. Different methodologies were applied in the four proposed damper systems in order to optimize their implementation into the earthquake resistant structural systems. To compare the structural system performance by using the different devices, the idea of damage indicator was utilized with certain modifications. The structural damage, non-structural damage, and the damage to the contents of different systems with the permanent deformations of the systems were considered at different ground acceleration histories. The comparisons were made with the buckling restrained steel bracing system. The effectiveness of the implementation of SMA dampers in reduction of the residual deformations on the structure is presented even after very high ground motions.
Different crystallographic phases of shape memory alloy (SMA) materials were used in a damper in order to produce an effective behavior device capable of dissipating energy, while containing the recentering capability. Different methodologies were applied in the four proposed damper systems in order to optimize their implementation into the earthquake resistant structural systems. To compare the structural system performance by using the different devices, the idea of damage indicator was utilized with certain modifications. The structural damage, non-structural damage, and the damage to the contents of different systems with the permanent deformations of the systems were considered at different ground acceleration histories. The comparisons were made with the buckling restrained steel bracing system. The effectiveness of the implementation of SMA dampers in reduction of the residual deformations on the structure is presented even after very high ground motions.
引文
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心