【作者】 许文鹏；

【导师】 上官兴； 徐海燕；

【作者基本信息】 华东交通大学 ， 道路与铁道工程， 2009， 硕士

【摘要】 随着我国公路交通的发展,交通量的不断增多,斜拉桥日益向着更长、更宽的方向发展。当车道数目从四车道增加至八车道后,桥梁横向跨度很大。这样,双索面结构形式必然使得横梁尺寸增大,特别是对于混凝土斜拉桥,横向将会控制设计。如若考虑利用中央分车带的宽度增加一个索面,将会使横向内力和活载效应大大降低。文中分别列举了一座中小跨径双索面混凝土斜拉桥和一座大跨双索面钢斜拉桥,较为详细的讨论了在增加一个索面后对横梁产生的影响。广州珠江黄埔大桥是一座八车道双索面钢箱梁斜拉桥(独塔383+322m=705m),其横向跨度达35m,但由于封闭式钢箱梁抗弯能力好,双索面结构形式横向也能较容易满足受力要求。而当多索面与叠合梁相结合时,才能很好的发挥其各自的效用。因此提出一种与黄埔桥同跨径、同宽度、同荷载标准的四索面叠合梁独塔斜拉桥方案,并对此优化方案进行了经济分析和详细的结构验算。计算结果表明,拟定的方案合理可行。更多还原

【Abstract】 Along with the development of the highway undertaking, the traffic volume is increasing faster and faster. The cable stayed bridge is developing in the direction of long range and more wider.With the lane numbers increasing from four lanes to eight lanes, the landscape’s span length is more wider and wider.And so, cable-stayed bridge with double cable planes will increase the size of the beam. Especially for concrete cable-stayed bridge, the landscape orientation will control design.If increasing a plane of stay cable, the internal force and influence of live load is smaller.taking a concrete cable-stayed bridge and a steel cable-stayed bridge for example in the text,and discussing more influence details because of increasing a plane of stay cable.Huangpu bridge is a steel cable-stayed bridge with double cable planes in Guangzhou(single tower 383+322m=705m).It’s landscape span length of the beam reachs 35m, the resistance to bending of the closed-end steel box girder is large enough,so double cable planes can meet the challenge easily.When multiple cable planes are combined with composite beam,it will play respective action well. A proposal of four planes cable-stayed bridge of composite beam will be made on condition that same span,same width,same load condition with Huangpu bridge.Base on the program I have done the economic analysis and detailed structure analysis.The results show that the alternative is feasible.更多还原