SMA-负刚度双曲面隔震装置的减震性能研究

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摘要

虽然SMA减隔震支座可以提高桥梁的自复位能力，但与普通减隔震支座相比，会增大下部结构的内力响应。为解决这一问题，拟提出一种新型SMA负刚度双曲面隔震装置。该装置由SMA索提供恢复力，由两个曲面反向的摩擦摆支座提供负刚度，由滑块和上、下钢板间的摩擦提供耗能能力。理论推导及有限元分析结果表明，该减震装置既可为桥梁提供自复位能力，又可在减小桥梁位移响应的前提下，部分减小SMA隔震桥梁结构体系的内力响应。

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	杨大余1
	常化慧2
	曹飒飒2

关键词 ：桥梁, 隔震装置, 负刚度, 反双曲面, 形状记忆合金

Abstract：

Compared with traditional isolation bearings, superelastic shape memory alloy (SMA)-based isolation bearings can improve the re-centering capability of bridges, but they result in higher forces in the substructures.A novel SMA-based negative stiffness isolation bearing was proposed to reduce the forces.It was composed of SMA-cable, providing the re-centering capability, and a friction pendulum bearing with inverted surfaces, providing negative stiffness to reduce the transmitted forces.The theoretical and finite element analyses of the bearing were conducted.It turns out that the novel isolation bearing can not only provide re-centering capability, but also reduce the internal force response of bridges when they are subjected to earthquakes.

Key words： bridge isolation bearing negative stiffness double inverted surfaces superelastic shape memory alloy

收稿日期: 2020-07-08 出版日期: 2021-05-28

引用本文:

杨大余1，常化慧2，曹飒飒2. SMA-负刚度双曲面隔震装置的减震性能研究[J]. 振动与冲击, 2021, 40(10): 123-132.
YANG Dayu1，CHANG Huahui2，CAO Sasa2. Aseismic performance of SMA-based negative stiffness isolation bearings. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(10): 123-132.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2021/V40/I10/123

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