【摘要】 基于随机振动理论为基础,以苏通长江公路大桥为背景,对超大跨度斜拉桥在随机地震荷载作用下的动力响应展开研究。从计算分析的角度,探讨了桩—土—结构动力相互作用对苏通大桥地震动力响应的变化规律。计算结果表明,建立在柔性地基上的大跨度斜拉桥,应当合理考虑基础刚度效应或桩—土—结构动力相互作用的影响,不能把基础直接考虑为固结模式。更多还原

【Abstract】 Based on stochastic vibration theory and combined with Sutong Yangtze River Highway Bridge,the stochastic seismic response of super-long-span cable-stayed bridge is developed.The law which the pile-soil-structure interaction impacts the seismic response of Sutong Yangtze River Highway Bridge is discussed from the perspective of calculation and analysis.The results show that it is important for long-span cable-stayed bridge built on the flexible foundation to consider stiffening effect or pile-soil-structure interaction,that is to say,the consolidation mode can not be used.更多还原