世界桥梁
世界橋樑
세계교량
WORLD BRIDGE
2014年
6期
46-49,54
,共5页
城市桥梁%连续梁桥%摩擦摆支座%力学参数%复位能力%减震性能%有限元法
城市橋樑%連續樑橋%摩抆襬支座%力學參數%複位能力%減震性能%有限元法
성시교량%련속량교%마찰파지좌%역학삼수%복위능력%감진성능%유한원법
urban bridge%continuous girder bridge%friction pendulum bearing%mechanical parameter%reset ability%seismic mitigation performance%finite element method
为研究摩擦摆支座在提高城市大跨连续梁桥抗震性能上的适用性，以位于8度区的（90＋170＋90） m某城市大跨连续梁桥为研究对象，对该桥摩擦摆支座进行设计，并采用非线性时程反应分析法研究摩擦摆支座的减震效果。结果表明：摩擦摆支座对城市大跨连续梁桥下部结构的纵、横向内力减震效果显著；从自复位能力的角度，摩擦摆支座的摩擦系数取值不宜过大，应根据非线性时程反应分析获得的支座最大位移量验算摩擦摆支座的自复位能力；由于该桥上部结构恒载较大，摩擦摆固定支座的静摩擦力远大于全桥的制动力，因此在不设置剪力键的条件下，也能满足桥梁的正常使用功能。
為研究摩抆襬支座在提高城市大跨連續樑橋抗震性能上的適用性，以位于8度區的（90＋170＋90） m某城市大跨連續樑橋為研究對象，對該橋摩抆襬支座進行設計，併採用非線性時程反應分析法研究摩抆襬支座的減震效果。結果錶明：摩抆襬支座對城市大跨連續樑橋下部結構的縱、橫嚮內力減震效果顯著；從自複位能力的角度，摩抆襬支座的摩抆繫數取值不宜過大，應根據非線性時程反應分析穫得的支座最大位移量驗算摩抆襬支座的自複位能力；由于該橋上部結構恆載較大，摩抆襬固定支座的靜摩抆力遠大于全橋的製動力，因此在不設置剪力鍵的條件下，也能滿足橋樑的正常使用功能。
위연구마찰파지좌재제고성시대과련속량교항진성능상적괄용성，이위우8도구적（90＋170＋90） m모성시대과련속량교위연구대상，대해교마찰파지좌진행설계，병채용비선성시정반응분석법연구마찰파지좌적감진효과。결과표명：마찰파지좌대성시대과련속량교하부결구적종、횡향내력감진효과현저；종자복위능력적각도，마찰파지좌적마찰계수취치불의과대，응근거비선성시정반응분석획득적지좌최대위이량험산마찰파지좌적자복위능력；유우해교상부결구항재교대，마찰파고정지좌적정마찰력원대우전교적제동력，인차재불설치전력건적조건하，야능만족교량적정상사용공능。
To study the applicability of friction pendulum bearings in enhancing the seismic performance of urban long‐span continuous girder bridge ,a bridge with span arrangement of (90+170+90) m in the area of 8 degree seismic intensity is taken as the study background .De‐signs were undertaken to the friction pendulum bearings of the bridge ,and the non‐linear time‐history response analysis method was used to study the seismic mitigation effect of the friction pendulum bearings .The results of the analysis indicate that friction pendulum bearings exhibit remarkable seismic mitigation effect on the longitudinal and transverse internal force of the sub‐structures of the urban long‐span continuous girder bridges .From the perspective of self‐reset a‐bility ,the values of friction coefficient of the friction pendulum bearings should not be very great , and the self‐reset ability of the friction pendulum bearings should be checked according to the maximum displacement amount of the bearings gained by the non‐linear time‐history response a‐nalysis .Because the dead load of the superstructure of the bridge is great ,the static friction force of the fixed friction pendulum bearings is far greater than the braking force of the whole bridge , which is able to satisfy the requirements of the normal operation of the bridge in the context that no shear stud connectors are installed .
