摘要
为了使隔震结构体系能够同时获得良好的隔震特性及震后自复位能力,本文利用形状记忆合金(SMA)材料在相变伪弹性阶段具有较好阻尼性能这一特点,采用SMA自复位阻尼器与常规叠层橡胶垫组合成自复位隔震装置。根据SMA材料相变伪弹性的本构模型,对SMA自复位阻尼器在反复循环荷载下的力学行为进行了数值模拟,得到了相应的滞回耗能曲线。提出了一种针对SMA自复位阻尼器的分段线性化恢复力模型,并依据剪切型层模型理论,编制了设有SMA自复位阻尼器隔震结构在地震作用下的弹塑性时程分析程序,对设有这种新型隔震装置工程结构进行地震反应分析。分析结果表明,这种隔震装置不仅可以大大减轻地震对上部结构的影响,而且还具有很好的震后复位能力,因此具有较好的工程应用前景。
In this paper a new isolation system, which combines shape memory alloy （SMA） damper and laminated rubber beating, is proposed to obtain preferable isolation characteristics and re-centering capacity. According to the constitution model of SMA at pseudo-elasticity state, the program is compiled to illustrate the feasibility and effectiveness of the proposed system, and to simulate the mechanical behavior of damper and obtain the hysteretic curve. Based on those mentioned above, a linear restoring model for SMA re-centring damper is put forward. In addition , the program based on the theory of story model for shear tape is compiled to conduct elastic-plastic time history analysis of practical structure examples. The results reveal that the seismic response of the structure is significantly reduced, and the full re-centring capacity after earthquake is obtained by this isolation system.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2006年第5期110-117,共8页
Journal of Building Structures
基金
国家自然科学基金项目(59878044)
中国博士后科学基金项目(2005037240)
高等学校博士学科点专项科研基金项目(20050703004)
广东省地震工程重点实验室开放基金项目(kzg-008)资助
关键词
形状记忆合金
自复位阻尼器
叠层橡胶垫
隔震
弹塑性时程分析
SMA
re-centring damper
laminated rubber beating
base isolation
elastic-plastic time history analysis
