【摘要】 单向纵坡斜拉桥在由塔梁临时固结向漂浮体系转换时由于主梁单向纵坡的影响,临时固结处产生不平衡的纵桥向水平冲击力.利用ANSYS程序建立了彭溪河特大桥的平面有限元模型,分析该不平衡力在体系转换中对结构内力和位移的影响程度,在此基础上提出减少其影响的体系转换顺序.更多还原

【Abstract】 When the system of a unidirectional slope cable-stayed bridge transfers from the fixed state into the floating one,there are the balanceless impulsive forces at every fixed spot because of the unidirectional slope.By the finite element analysis model of the main bridge in ANSYS,the effects which the force had taken on the internal forces and the displacements of the structure were analyzed.On the basis of these,the transformation sequence project is put forward to reduce adverse effects.更多还原