论文部分内容阅读
通过对黏弹性阻尼器缩尺试件进行不同应变幅值、加载频率和环境温度下的基本力学性能试验、老化性能试验以及低周、高周疲劳性能试验,研究试件在不同工况下的剪切存储模量、剪切损失模量和损耗因子等力学参数,及其力学性能的变化规律。其中,力学性能试验的应变幅值100%～420%;低周疲劳试验最大应变达300%。试验结果表明:黏弹性阻尼器力学性能与加载频率相关性较小,与温度相关性相对明显,随应变幅值的增加阻尼器表现出软化特征,但其损耗因子始终保持在比较高的水平;阻尼器在小位移和大位移下都有稳定耗能能力,可用于风振控制和地震响应控制;阻尼器表现出良好的变形能力,在200%大应变下仍保持稳定的力学性能,应变420%时仍未破坏。
Through the test of viscoelastic damper scale specimen under different strain amplitudes, loading frequency and ambient temperature, the aging performance test and the low cycle, high cycle fatigue performance test, the test specimens under different conditions Shear storage modulus, shear loss modulus and loss factor and other mechanical parameters, and their mechanical properties of the law of change. Among them, the mechanical properties of the test strain amplitude 100% ~ 420%; low-cycle fatigue test the maximum strain of 300%. The experimental results show that the viscoelastic damper has a little correlation with the loading frequency and a relatively obvious correlation with the temperature. The damper exhibits a softening characteristic with the increase of the strain amplitude, but its loss factor always remains at a relatively high level. The damper has stable energy dissipation capacity under small displacement and large displacement and can be used for wind vibration control and seismic response control. The damper shows good deformation ability and maintains stable mechanical properties under 200% strain. The strain 420 % Still not damaged.