桥梁建设
橋樑建設
교량건설
BRIDGE CONSTRUCTION
2015年
4期
39-45
,共7页
夏修身%崔靓波%陈兴冲%李建中
夏脩身%崔靚波%陳興遲%李建中
하수신%최정파%진흥충%리건중
连续梁桥%长联%大跨度桥%摩擦摆支座%粘滞阻尼器%减震%隔震
連續樑橋%長聯%大跨度橋%摩抆襬支座%粘滯阻尼器%減震%隔震
련속량교%장련%대과도교%마찰파지좌%점체조니기%감진%격진
continuous beam bridge%super long unit%long span bridge%friction pendulum bearing%viscous damper%seismic mitigation%seismic isolation
为从有利于各墩协同抗震的角度探讨适用于长联大跨连续梁桥的减、隔震技术，以内蒙刘召黄河大桥主桥其中一联（55＋10×100＋55） m的预应力混凝土连续梁桥为背景，开展摩擦摆支座隔震、粘滞阻尼器减震及盆式橡胶支座抗震研究。建立全桥有限元计算模型，采用双线性滞回模型模拟摩擦摆支座、M ax w ell模型模拟粘滞阻尼器，输入50年超越概率2％的3条地震波进行非线性时程反应分析。结果表明，长周期长联大跨连续梁桥的隔震机理为通过减弱制动墩对主梁的约束来减小作用于制动墩顶的有效主梁质量、改制动墩单独抗震为各墩协同抗震；摩擦摆支座隔震可有效地提高其抗震性能。
為從有利于各墩協同抗震的角度探討適用于長聯大跨連續樑橋的減、隔震技術，以內矇劉召黃河大橋主橋其中一聯（55＋10×100＋55） m的預應力混凝土連續樑橋為揹景，開展摩抆襬支座隔震、粘滯阻尼器減震及盆式橡膠支座抗震研究。建立全橋有限元計算模型，採用雙線性滯迴模型模擬摩抆襬支座、M ax w ell模型模擬粘滯阻尼器，輸入50年超越概率2％的3條地震波進行非線性時程反應分析。結果錶明，長週期長聯大跨連續樑橋的隔震機理為通過減弱製動墩對主樑的約束來減小作用于製動墩頂的有效主樑質量、改製動墩單獨抗震為各墩協同抗震；摩抆襬支座隔震可有效地提高其抗震性能。
위종유리우각돈협동항진적각도탐토괄용우장련대과련속량교적감、격진기술，이내몽류소황하대교주교기중일련（55＋10×100＋55） m적예응력혼응토련속량교위배경，개전마찰파지좌격진、점체조니기감진급분식상효지좌항진연구。건립전교유한원계산모형，채용쌍선성체회모형모의마찰파지좌、M ax w ell모형모의점체조니기，수입50년초월개솔2％적3조지진파진행비선성시정반응분석。결과표명，장주기장련대과련속량교적격진궤리위통과감약제동돈대주량적약속래감소작용우제동돈정적유효주량질량、개제동돈단독항진위각돈협동항진；마찰파지좌격진가유효지제고기항진성능。
To study the seismic mitigation and isolation techniques suitable for long span and super long unit continuous beam bridge from the angle of facilitating the collaborated seismic re‐sistance of all piers of the bridge ,one of the continuous unit of the (55+10 × 100+55) m pres‐tressed concrete continuous beam bridge of the main bridge of Liuzhao Huanghe River Bridge in In‐ner Mongolia was cited as an example and the seismic isolation of friction pendulum bearings ,seis‐mic mitigation of viscous dampers and seismic resistance of rubber pot bearings were investigated . The finite element calculation model for the whole bridge of the example bridge was established , the bilinear hysteretic model was used to simulate the friction pendulum bearings ,the Maxwell model was used to simulate the viscous dampers and by way of inputting 3 seismic waves of 2% of the 50‐year exceedance probability ,the nonlinear time‐history response analysis was carried out . T he results of the analysis demonstrate that the seismic isolation mechanism of the long period , long span and super long unit continuous beam bridge is to reduce the effective main beam mass acting on the braking pier tops by weakening the restraint of the braking piers to the main beam and is to change the independent seismic resistance of the piers into the collaborated seismic resist‐ance of all piers .The application of the seismic isolation of friction pendulum bearings can effec‐tively improve the seismic performance of the bridge .
