以某高震区大跨度半漂浮体系斜拉桥为例进行了反应谱分析和时程反应分析,分析结果表明,偶然组合作用下桥塔和主梁满足承载力要求。但受地震效应控制,与同类型同规模斜拉桥相比,本桥尺寸明显偏大。本文的研究成果对高震区大跨度斜拉桥的抗震设计具有借鉴意义。 Taking a long-span semi-floating system cable-stayed bridge in a high earthquake area as an example, the response spectrum analysis and time-history analysis are carried out. The analysis results show that the tower and main girder satisfy the requirements of bearing capacity under the accidental combination. But by the earthquake effect control, compared with the same type of cable-stayed bridge of the same scale, the bridge size is obviously larger. The research results of this paper have reference significance for the seismic design of long-span cable-stayed bridges in high earthquake area.