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湖北鄂黄长江公路大桥主桥为 55+2 0 0 +480 +2 0 0 +55m的五跨连续预应力混凝土斜拉桥 ,采用双塔双索面全漂浮体系。虽然桥位处抗震设防烈度不高 ,但该桥是跨越长江的特大型桥梁 ,其抗震性能尤为重要。本文结合鄂黄大桥的抗震设计 ,从场址地震安全性评价、地震荷载计算、斜拉桥支撑体系选择、抗震措施等方面研究斜拉桥的抗震性能。
A five-span continuous prestressed concrete cable-stayed bridge with a main span of 55 + 200 + 480 + 200 + 55m is adopted for the main bridge of the Hubei-Hubei Yellow River Highway Bridge, and a twin-tower double-cable plane floating system is adopted. Although the intensity of seismic fortification at the bridge is not high, the bridge is an extra large bridge across the Yangtze River and its seismic performance is particularly important. In this paper, considering the seismic design of E Huang Bridge, the seismic performance of cable-stayed bridges is studied from the aspects of site seismic safety evaluation, seismic load calculation, selection of supporting system of cable-stayed bridge and seismic measures.