渡槽斜面导向自复位减隔震支座设计及其隔震性能分析

为了使渡槽结构具有良好的减隔震性能及震后自复位功能,在球型支座基础上开发了一种斜面导向的自复位减隔震支座。首先介绍了斜面自复位减隔震支座的构造特点及隔震机理,然后对该支座进行足尺试验并与理论模型对比,最后采用ABAQUS有限元软件分析单跨渡槽结构的地震反应及减隔震效果。试验结果表明,该支座具有稳定的减隔震性能,由试验得出的荷载和位移的关系曲线与提出的理论曲线趋势基本一致。数值算例结果显示该新型支座能够显著减小地震反应,支座残余位移0.4mm,具备了很好的自复位效果。

Design and Seismic Isolation Performance of Aqueduct with Bevel Guide Automatic Reset Seismic Isolation Bearing

In order to make the aqueduct structure have good seismic isolation performance and automatic reset function after the earthquake,a beveled guide automatic reset and seismic isolation bearing has been developed based on spherical bearing.The structural characteristics and isolation mechanism of the automatic reset are introduced first.Then the full-scale test of the bearing is carried out and compared with the theoretical model.Finally,the earthquake response and isolation performance of a single-span aqueduct structure are analyzed using the ABAQUS finite element software.The result shows that the new type bearing has stable seismic isolation performance.The relationship between the load and the displacement obtained by the test is basically consistent with the trend of the proposed theoretical curve.The numerical study shows that it can significantly reduce the seismic response,and the residual displacement of the bearing is 0.4 mm,which has a good automatic reset effect.