弹塑性钢减震支座结构受力分析

Force Analysis of Elasto-plastic Steel Damping Bearing

地震对桥梁的危害是巨大的,基于桥梁抗震设计的结构控制技术,已在我国桥梁工程界得到日益重视,并逐步开展了桥梁减隔震设计研究工作。利用弹塑性钢塑性变形来耗能的金属阻尼支座是目前桥梁减隔震支座的一个重要分支。对一个常见的弹塑性钢减震支座结构进行了滞回分析、连接销和本体的计算分析。结果表明,该支座滞回曲线饱满,耗能效果好,基于能力保护构件设计的连接销和本体处于较低的弹性应力状态,满足了支座结构的受力要求。

Earthquake can lead to great damage to bridges,and based on structure control technology of bridge seismic design,great attention has been paid in bridge engineering,and research on bridge seismic isolation design had been gradually carried out.Nowadays metal damping bearing with elasticplastic steel＇s plastic deformation to dissipate energy is one important branch of bridge seismic isolation bearing.In the paper the hysteresis behavior,connecting pin and body structure of elasto-plastic steel damping bearing are analyzed which show that bearing Hysteresis curve is full and effectively dissipate energy,bearing connecting pin and body structure based on ability-protect product design is in low elastic stress state,which meet force requirements of bearing.