首页|形状记忆合金自复位耗能装置滞回性能及简化分析模型

形状记忆合金自复位耗能装置滞回性能及简化分析模型

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将形状记忆合金(SMA)应用于耗能装置,可限制耗能装置在强震作用下的残余变形,提升装置自复位能力和结构抗震韧性.采用软钢和SMA材料,设计研发一种由内环和外环核心元件组装而成的新型自复位耗能装置.通过建立自复位耗能装置的精细化有限元分析模型和简化分析模型,分析该新型装置在不同内环和外环核心元件参数下的承载能力、耗能能力、自复位能力等滞回性能变化规律,并通过已有试验结果验证精细化有限元分析模型的有效性,进而通过该模型验证简化分析模型的准确性.设计研发的新型装置内环和外环元件可近似为独立工作,自复位耗能机制明确.当内环和外环元件均采用软钢材料时,装置的耗能能力较强,但残余位移极大;当内环元件采用SMA材料、外环元件采用软钢材料时,装置的耗能能力下降较为明显,但残余位移变化不大;当内环元件采用软钢材料、外环元件采用SMA材料时,装置耗能能力下降明显,但残余位移极小.对于内环元件采用软钢材料、外环元件采用SMA材料的装置,内环和外环元件的厚度增大均可显著提升装置的抗侧刚度、承载能力和耗能能力,残余位移会随着内环元件厚度减小或外环厚度增大而减小.在抗震设计时,可根据结构抗震需求,选取元件设计厚度.
Hysteretic Performance and Simplified Analysis Model of Shape Memory Alloy Self-centering and Energy-dissipating Device
The application of shape memory alloy (SMA) in the energy dissipating device can limit the residual deformation of energy dissipating device under strong earthquake.It can improve the self-centering ability of device and the seismic resilience of structure.The new device with self-centering and energy-dissipating capacity was designed and developed.The mild steel and SMA were used as the main components of inner and outer rings.The refined finite element analysis model and simplified analysis model for device were established to analyze the hysteresis performance of new device with different parameters of inner and outer ring components,e.g.,carrying capacity,energy-dissipating capacity and self-centering capacity.In addition,the validity of refined finite element analysis model was verified with existing test result.Then,the accuracy of simplified analysis model was verified by using refined finite element analysis model.The inner and outer ring of new device work independently and the mechanism of self-centering and energy-dissipating is clear.When both the inner ring and outer ring are made of mild steel,the energy-dissipating capacity of device is strong,but the residual displacement is large.When the inner ring is made of SMA,and the outer ring is made of mild steel,the energy-dissipating capacity of device decreases obviously,but the residual displacement changes little.When the inner ring is made of mild steel,and the outer ring is made of SMA,the energy-dissipating capacity of device decreases obviously,but the residual displacement is very small.For the devices with inner ring of mild steel and outer ring of SMA,the lateral stiffness,load-carrying capacity and energy-dissipating capacity of device can be significantly improved with the thickness increase of inner and outer ring.The residual displacement decreases with the decrease of thickness of inner ring or outer ring.In the seismic design,the design thickness of ring can be selected according to the seismic requirements of structures.

bridge engineeringhysteretic performancesimplified analysis modelself-centering and energy-dissipating deviceshape memory alloy (SMA)

和海芳、周雨龙、程寿山、周海、费执轩

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交通运输部公路科学研究院,桥梁结构安全技术国家工程实验室,北京 100088

长沙理工大学 桥梁工程安全控制教育部重点实验室,湖南 长沙 410114

重庆市公路事务中心,重庆 401120

桥梁工程 滞回性能 简化分析模型 自复位耗能装置 形状记忆合金

中央级公益性科研院所基本科研业务费专项资金项目桥梁结构安全技术国家工程实验室(北京)开放课题

2021-90522020-GJKFKT-8

2024

10.3969/j.issn.1002-0268.2024.07.010

公路交通科技
交通运输部公路科学研究院

公路交通科技

CSTPCD北大核心
影响因子：1.007
ISSN：1002-0268
年,卷(期)：2024.41(7)
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