【摘要】 结合某一工程,采用软土粘塑性动力本构模型,在合理模拟深软场地非线性基础上讨论土-结构动力相互作用对斜拉桥被动控制效果的影响。利用软件ABAQUS建立了深软场地-桩基-斜拉桥三维有限元模型,作为对比,建立了深软场地上不考虑土-结构动力相互作用的常规刚性地基模型,通过时程分析法计算斜拉桥地震反应。计算结果表明:深软场地上考虑土-结构动力相互作用后,斜拉桥被动控制效果下降;在刚性地基上取得良好减震效果的被动控制手段若照搬至柔性地基上,可能不仅减震效果不好,还会给桥梁结构增加内力负担。更多还原

【Abstract】 In the light of a specific project,a new viscous plastic model of soil is proposed.An analysis of vibration passive control of cable-stayed bridge considering soil-structure interaction is conducted.Both the cable-stayed bridge analytic models with considering rigid foundation and thick soft site-pile foundation are built up by using software ABAQUS.The seismic responses of the two bridge models are analyzed by using time history analysis.The results show that the passive control effect decreases with considering soil-structure interaction and if the passive control designed for bridges on rigid foundation is used to bridges on soft soil foundation,it can make negative effect on the inner force of the bridge.更多还原