【摘要】 大连跨海大桥主通航孔方案为主跨800 m的自锚式斜拉-悬索协作体系桥,对该桥进行了动力特性分析并按照三水准抗震设防目标的要求,用反应谱方法对该桥进行了地震反应分析。为了保证计算精度,取前120阶振型进行叠加计算,在反应谱计算中采用了CQC方法,得到的一些结论可为该类桥梁的初步设计与施工提供参考。更多还原

【Abstract】 The main bridge of Dalian Gulf Bridge is a kind of self-anchored cable-stayed suspension bridge with 800m main span.The dynamic characteristics of this bridge is analyzed,and the seismic response is analyzed with response spectrum method based on the three level earthquake fortification in Chinese seismic design code.In order to ensure the computing precision,the first 120 mode of vibration are gradually summed up.The CQC method is applied to the response spectrum computation.Finally,some conclusions are drawn which will be helpful to the preliminary design and construction of the similar bridge.更多还原