CAJ | 학술논문

针对桥梁结构分析中常将聚四氟乙烯滑板橡胶支座处理成理想活动支座而忽略滑板与梁底钢板间摩擦耗能作用问题，采用双线性模型及摩擦滑动单元分别模拟滑板支座进行非线性时程分析，获得支座及结构反应。分析结果表明，理想的活动支座模型会高估桥梁的地震反应，双线性模型与摩擦滑动单元模型分析结果接近；摩擦滑动单元能考虑支座竖向力变化对摩擦力影响及曲线桥支座负反力情况，更符合实际，适用性更广。
침대교량결구분석중상장취사불을희활판상효지좌처리성이상활동지좌이홀략활판여량저강판간마찰모능작용문제，채용쌍선성모형급마찰활동단원분별모의활판지좌진행비선성시정분석，획득지좌급결구반응。분석결과표명，이상적활동지좌모형회고고교량적지진반응，쌍선성모형여마찰활동단원모형분석결과접근；마찰활동단원능고필지좌수향력변화대마찰력영향급곡선교지좌부반력정황，경부합실제，괄용성경엄。
Teflon slide rubber bearing is often used on bridge.An imaginery expansion bearing element is usually adopted to simulate this rubber bearing in analysis.This imaginary expansion bearing model will ignore the friction between teflon layer and steel surface.A curved continuous girder bridge was taken as an example,bilinear sliding bearing element and friction isolator elements were employed respectively to simulate teflon slide bearings on the bridge. The results of nonlinear dynamic analysis show that seismic responses of bridge on which the slide rubber bearings are modeled as imaginary expansion bearing elements are overestimated.Seismic responses of bridge adopting bilinear sliding bearing model is similar to those of bridge adopting friction isolator model.Friction isolator can consider the varying friction force of bearing,so the use of this model to simulate teflon slide rubber bearing is in coincidence with the actual case.