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文章以黑瞎子岛乌苏斜拉桥为工程背景,基于非线性理论和稳定分析理论,通过建立有限元模型,研究了在结构自重、二期恒载(桥铺、防撞护栏等)、斜拉索张拉力以及汽车荷载作用下桥梁的稳定性。结果表明:乌苏斜拉桥发生屈曲失稳破坏是以主塔横桥向失稳为最早发生的;第一类稳定分析的安全系数均大于按照第二类稳定分析结果,偏于保守和安全考虑前提下,实际应用中可将按照第一类稳定分析的安全系数作为上限值;该桥成桥运营阶段的稳定性良好,安全储备较大。
Based on the Black Uzbek Island Wusu cable-stayed bridge as an engineering background, based on the nonlinear theory and the stability analysis theory, the finite element model is used to study the structural characteristics of the cable- Tension of cable and the stability of bridge under the load of automobile. The results show that the buckling failure of Wusu cable-stayed bridge is the earliest occurrence of buckling of the main tower due to transverse bridge instability. The safety coefficients of the first type of stability analysis are all greater than those of the second type of stability analysis, Considering the premise, in practical applications, the safety factor of the first type of stability analysis may be taken as the upper limit value. The stability of the bridge into a bridge operation phase is good and the safety reserve is relatively large.