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RESEARCH ON SHEAR PROPERTIES AND SELF-RECOVERY CHARACTERISTICS OF SHAPE MEMORY ALLOY PSEUDO-RUBBER BEARINGS
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摘要: 对两类工艺(Ⅰ、Ⅱ类)制备的自复位形状记忆合金橡胶支座进行循环剪切试验,系统研究其在不同加载频率、加载幅值、加工工艺及预加压缩荷载工况下的剪切性能,并对产生残余应变的形状记忆合金橡胶支座进行升温自恢复及力学性能试验。研究结果表明:两类形状记忆合金橡胶隔震支座的剪切性能稳定,等效阻尼比随剪切幅值的增大而提高;通过预加压缩荷载可以大幅提高形状记忆合金橡胶隔震支座的剪切刚度和耗能能力。两类试件都能通过升温消除残余应变,其中Ⅱ类试件与升温前的力学性能稳定,具备很好的重复性。
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关键词:
- 形状记忆合金橡胶隔震支座 /
- 剪切性能 /
- 升温自恢复 /
- 预加压缩荷载
Abstract: Based on the shear test of two types(Ⅰ and Ⅱ) of shape memory alloy pseudo-rubber(SMAPR) bearings, the effects of loading frequency, loading amplitude, processing technology and pre-compression stress on its shear properties of its non-forming direction were studied. In addition, the self-recovery through temperature-rising and subsequent mechanical properties were investigated for the SMAPR specimen with residual deformation. The results showed that the shear properties of type Ⅰ and Ⅱ SMAPR bearings were stable, and the equivalent damping ratio increased with the increment of shear amplitudes. The shear stiffness and energy dissipation capacity of SMAPR isolators could be greatly improved by applying pre-compression loads. The residual strain of the two types of specimens could both be eliminated through temperature-rising, and the mechanical properties of type Ⅰ specimens were consistent with those before temperature-rising, which had good repeatability. -
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1. 黎大玮，夏修身，张永强，马健行，罗辉. 金属橡胶桥梁支座剪切屈服后刚度研究. 地震工程学报. 2023(02): 355-361 . 
百度学术2. 邵晓宙，郝晓华，张东，康文凯，温毅. 核电工程基础隔震中应用金属橡胶的探讨. 工业建筑. 2023(S1): 585-587+584 . 本站查看3. 孟亮，马洪伟. 负刚度-惯容阻尼器对隔震结构减震性能提升研究. 噪声与振动控制. 2023(06): 275-281 . 百度学术4. 智友海，史向平. 超弹性NiTi合金夹芯体的冲击性能分析. 兵器材料科学与工程. 2023(06): 99-106 . 百度学术其他类型引用(3)
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