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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。
The main navigable hole scheme of Dalian Cross-sea Bridge is a self-anchored cable-stayed cable suspension system bridge spanning 800 m. The dynamic characteristics of this bridge are analyzed. According to the requirements of three-level seismic fortification target, Bridge seismic response analysis. In order to ensure the accuracy of the calculation, the first 120 orders of vibration modes are superimposed and calculated. The CQC method is adopted in the calculation of response spectrum. Some conclusions obtained can provide references for the preliminary design and construction of such bridges.