大跨度钢混组合桥梁结构地震响应分析 - 中国土木科技网.pdfVIP

200 8 29 5 王孝军, 杜令俊, 马山明 ( , 2500 13) : 某在建的公铁两用斜拉桥为双塔三索面漂浮体系, 建立了该桥的动力计算模型, 并 得了此桥的动力特 性在求得了该桥的等效阻尼比, 并对反应谱进行了长周期段和阻尼影响修正的前提下, 进行了该漂浮体系钢- 混凝 土组合结构斜拉桥的地震反应谱响应分析分析结果表明, 对于钢- 混凝土组合结构, 必须求出其整体结构的等效阻 尼比, 以此阻尼比为依据, 对反应谱进行阻尼影响的修正, 同时应考虑反应谱长周期段取值对长周期结构地震反应谱 响应的影响 : 钢混组合桥梁结构; 地震响应; 等效阻尼比; 长周期反应谱 Seismic Response Analysis of Large- span Bridge with the Composite Structure of Steel-reinforced Concrete WA N G X iao-j un , D U L ing-j un , M A Shan- ming ( Shandong Yellow River Eng ineering Group Corpora ion L d, J inan 2500 13, China) Abstract: T he building hig hw ay- railw ay cable s ayed bridge is a floa sys em w i h w in ow ers and hree cable plane, and he dynamic calcula ion model w as es ablished for ge ing he dy namic proper y of he bridg e. In he premise of g e ing he bridg e. s equivalen modal damping ra ios and modifying he long per iod sec or and he damping eff ec of he spec r um , a seismic spec rum r esponse analysis w as done. A ll he r esul s show ha , o he composi e s ruc ure of s ee-l reinforced con- cre e, i is necessary o calcula e he equivalen damping ra io of he ov erall s ruc ure and modify he damping eff ec of he spec rum . Simul aneou sly , he long per iod response spec rum value for he eff ec of he seismic spec rum response of he long per iod s ruc ure should be considered . Key words: s ee-l reinfor ced concre e composi e bridge s ruc ure; seismic response; equivalen mo dal damping ra io; long per iod respo nse spec rum , , 5% , , 150 m 0 ~ 5 s , , 5% 1 [ 1] , , 1 092 m, 98 m + 196 m + 504 m +