桥梁减隔震设计与新型减隔震装置

结构减隔震设计通过在结构的适当位置布置减隔震装置,达到延长结构自振周期和耗散地震能量的目的。此时,主要的结构构件在罕遇地震作用下仍工作在弹性范围内。因此,结构减隔震设计方法可同时具备安全、经济、适用、易维护等多重优点,是最理想的抗震设计方法。以减隔震设计理论为技术支撑,多种新型抗震装置被开发出来,如高阻尼橡胶支座、滞后型阻尼器、液压阻尼器、电磁阻尼器等。文章论述了各种减隔震装置的基本理论及使用案例,有助于工程师进行抗震设计及减隔震产品的选择。

Seismic isolation design of bridge and new seismic isolation device

The design of seismic isolation is to locate seismic isolation devices on proper location in order to extend its natural vibration period and dissipate the earthquake energy.At this moment,the main structure is elastic under the condition of strong earthquake.Therefore,this method is safe,economic,proper and easy maintaining,it is the best way of seismic design.On the basis of this design theory,many types of new seismic devices are developed,such as： high damping rubber bearing,hysteresis damper,hydraulic damper,electromagnetic damper,etc..This paper elaborates the basic theory and use cases of various seismic isolation device,it is good for engineers to choose proper design method and proper seismic isolation products.