自恢复大行程形状记忆合金限位装置研究

胡付龙; 曹飒飒

doi:10.6052/j.issn.1000-4750.2021.05.S039

自恢复大行程形状记忆合金限位装置研究

doi: 10.6052/j.issn.1000-4750.2021.05.S039

胡付龙,
曹飒飒^,

广州大学土木工程学院，广州 510006

基金项目: 国家自然科学基金项目 (52178124，51608136，51278134)；广东省自然科学基金项目(2020A1515010231)；广东省科技计划项目 (2020A1414010271)；中国地震局工程力学研究所基本科研业务费专项项目(2019D19)

详细信息

作者简介:
胡付龙(1993−)，男，广东人，硕士生，主要从事桥梁抗震研究(E-mail: 1915349636@qq.com)

通讯作者:
曹飒飒(1982−)，男，河南人，讲师，博士，主要从事桥梁抗震研究(E-mail: cao@gzhu.edu.cn)

中图分类号: U442.5+5
计量
- 文章访问数: 58
- HTML全文浏览量: 17
- PDF下载量: 29
- 被引次数: 0
出版历程
- 收稿日期: 2021-05-29
- 修回日期: 2022-01-22
- 网络出版日期: 2022-03-08
- 刊出日期: 2022-06-06

EXPERIMENTAL STUDY ON MECHANICAL PERFORMANCE OF LONG-STROKE SMA RESTRAINER

HU Fu-long,
CAO Sa-sa^,

Department of Civil Engineering, Guangzhou University, Guangzhou 510006, China

摘要

摘要: 普通限位装置极限位移小，极有可能被破坏。为解决这一问题，拟提出一种新型自恢复大行程SMA限位装置。该装置由SMA内芯提供恢复力及耗能能力，由外钢管及砂浆提供抗屈曲能力。理论推导及有限元分析结果表明：该限位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，消耗地震能量。
- 桥梁抗震 /
- 大行程 /
- 拉压试验 /
- 形状记忆合金 /
- Abaqus
Abstract: With small limit displacement, the common restrainers are likely to be damaged. In order to solve this problem, a new self-centering long-stroke SMA restrainer is proposed. The re-centering force and energy dissipation capacity are provided by the inner SMA bar, and the buckling resistance is provided by the outer steel tube and grout. The results of tests and finite element analysis show that the restrainer can not only provide the bridge with self-centering ability, but also dissipate seismic energy on the premise of reducing the displacement response of the bridge.
- seismic protection of bridges /
- long-stroke /
- tension and compression test /
- shape memory alloy /
- Abaqus

HTML全文

图 1 LSR基本构造

Figure 1. Basic structure of LSR

下载: 全尺寸图片幻灯片

图 2 LSR屈曲机制与抗屈曲体系

Figure 2. Buckling and anti-buckling system

下载: 全尺寸图片幻灯片

图 3 SMA棒临界状态受力分析

Figure 3. Force analysis of critical state of LRB

下载: 全尺寸图片幻灯片

图 4 SMA棒的Von-Mises应力代表性轮廓图

Figure 4. Von-mises contour of SMA bar

下载: 全尺寸图片幻灯片

图 5 SMA试件试验与数值模拟结果比较

Figure 5. Comparison of experimental and simulation results of SMA bars

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图 6 3种试件屈曲试验与数值模拟结果

Figure 6. Buckling analyses of 3 SMA bars

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图 7 LSR的Abaqus数值模型

Figure 7. FE model of LSR in Abaqus

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图 8 LSR循环拉压试验和模拟结果

Figure 8. Experimental and simulation results of LSR under cyclic tension and compression

下载: 全尺寸图片幻灯片

表 1 SMA试件参数表

Table 1. Parameters of SMA bars

长细比$ \mathrm{\lambda } $ 直径/mm 无支承长度/mm

25 12 75
45 12 135
95 12 258

下载: 导出CSV

参考文献(14)

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