| SMA负刚度双曲面减震装置的优化及抗震性能研究 |
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| 引用本文： | 鄢生全,邵晨曦,曹飒飒.SMA负刚度双曲面减震装置的优化及抗震性能研究[J].世界地震工程,2023,39(1):100-108. |
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| 作者姓名： | 鄢生全 邵晨曦 曹飒飒 |
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| 作者单位： | 1.保利长大工程有限公司,广东广州511431;2.广州大学土木工程学院,广东广州510006 |
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| 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(2020A1515010231)；;广东省科技计划项目(2020A1414010271)； |
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| 摘 要： | SMA负刚度双曲面隔震装置的试验结果表明：绕支座布置的SMA索在支座转弯处不能自由滑动，导致SMA索的受力与设计目标严重不符。为解决上述问题，拟提出一种优化升级的SMA负刚度双曲面减震装置。基于某一连续梁桥，比较研究了正刚度、零刚度与该负刚度装置的抗震性能。结果表明：该优化装置具有良好的耗能能力、自恢复性能以及强震下的限位能力。与正刚度装置及零刚度装置相比，该装置具有更好的抗震性能。
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| 关 键 词： | 桥梁抗震 负刚度 形状记忆合金 限位能力 数值模拟 |
Optimization and seismic performance of SMA-based negative stiffness isolation device |
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| YAN Shengquan,SHAO Chenxi,CAO Sasa.Optimization and seismic performance of SMA-based negative stiffness isolation device[J].World Information On Earthquake Engineering,2023,39(1):100-108. |
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| Authors: | YAN Shengquan SHAO Chenxi CAO Sasa |
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| Institution: | 1. Poly Changda Engineering CO.,lTD., Guangzhou 511431, China; 2. Civil Engineering Guangzhou University, Guangzhou 510006, China |
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| Abstract: | The experimental results of SMA-based negative stiffness isolator show that the SMA cables arranged around the bearing can not slide freely, cause the serious inconsistency between the stress of SMA cables and the design goal. To solve this issue, an optimized SMA-based negative stiffness isolation device was proposed. Based on a continuous bridge, the seismic performance of positive stiffness, zero stiffness and negative stiffness devices is compared. The results show that the device has good energy dissipation capacity, re-centering capability and displacement-limiting capacity. Compared with other devices, the device has a better seismic performance. |
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| Keywords: | seismic design of bridge negative stiffness shape memory alloy displacement-limiting capacity numerical simulation |
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