Dynamic mechanical analysis of Norsorex/acrylonitrile butadiene rubber blends and their application in vibration control of steel frames:

摘要

The damping properties of acrylonitrile butadiene rubber/Norsorex? blends were investigated by dynamic mechanical analysis. The effects of Norsorex on the damping properties of acrylonitrile butadiene rubber/Norsorex blends were also studied. The results showed that 30-phr Norsorex could dramatically improve the damping of 70-phr acrylonitrile butadiene rubber. Compared with acrylonitrile butadiene rubber, the LA value of acrylonitrile butadiene rubber/Norsorex?=?70/30 increased to 7.3?×?108 from 3.0?×?108?Pa?K and the TA value increased from 26.6 to 28.4?K. To test the new high-damping-performance blends, shaking table tests on a four-story steel frame with viscoelastic damping wall were designed and the simulations were provided for verification. The experimental results indicated that the viscoelastic damping wall controlled the inter-story displacement well under apg?=?7?m/s2, which exceeded the specified limit under uncontrolled conditions. The viscoelastic damping wall showed a better control effect...