功能分离式桥梁减震支座

Integrated isolation bearing of bridge

针对普通桥梁减震支座存在肥大和振动问题,提出一种滑板橡胶支座+高阻尼橡胶阻尼器功能分离式减震支座。运用理论推导和试验的方法,得到了功能分离式减震支座的激励频率、剪应变幅值表达的等价刚度和等价阻尼比的计算分析式。采用专用的桥梁非线性动力计算程序,对一座四跨连梁在不同支座支承、不同设计条件下的地震动力反应进行计算比较。结果表明,功能分离式减震支座的应用,可以使桥梁的减震效果提高30%以上。

Aimed at the problems of fat and vibration that faced with common isolation bearings, this paper puts forward an integrated isolation bearing that is polysaccharides sliding rubber bearing+high damping rubber damper. Theory deduction and test are adopted to bring forward the equivalent stiffness and equivalent damping gene’s calculation formula that is dispicted by frequency and shearing amplitude. A 4-span continuous beam bridge is also analyzed with a special Nonlinear Dynamic Analysis Program under 4 various bearings and 4 various design conditions. The results indicate that the integrated isolation bearing can improve the isolation effect by more than 30%.