大型渡槽隔震体系结构动力特性的试验研究

Test Research on Dynamic Characteristics of Vibration Isolation System for Large-scale Aqueduct

为解决南水北调大型渡槽工程中的抗震问题,进行了模拟地震振动台试验研究,分析了减震支座水平刚度、槽内水体及场地对渡槽结构动力特性的影响。研究结果表明,减震支座的水平刚度越小、槽内水体质量越大,渡槽结构自振周期越长,从而达到减震效果,提高渡槽的抗震能力。此外,场地对减震效果影响显著。

In order to resolve the vibration problems of large-scale aqueduct in South-to-North Water Transfer Project,shaking table model tests of simulating earthquake action have been done,and the effects of horizon rigidity of vibration absorption bearing;waters in the flumes and field on aqueduct dynamic characteristics have been analyzed.The results indicate that the smaller horizon rigidity of vibration absorption bearing is;the bigger mass of waters in the flumes is,the longer natural period of vibration of aqueduct is.And so the effect of vibration absorption is got,and the vibration-resistant performance of aqueduct can be improved.In addition,the field has remarkable influence on the effect of vibration absorption.