三塔自锚式悬索桥经济性能研究

在统计国内外部分已建成的自锚式悬索桥材料用量的基础上,基于银川滨河黄河大桥,研究三塔自锚式悬索桥的经济性能,建立各构件材料用量与结构参数、受力的关系,并以此为基础分析加劲梁材料、矢跨比和边中跨比等参数对造价的影响。研究得出:改变加劲梁的材料,对三塔自锚式悬索桥造价的影响较大;矢跨比的增加可以大幅减少主缆的造价;当桥梁总长一定时,边中跨比合理的范围内应选取较大值。

Economic performance study of three-tower self-anchored Suspension bridge

Taking a three-tower self-anchored suspension bridge as the research object, based on the data of Three-tower Self-anchored Suspension Bridges built at home and abroad, the Economic performance of the Three-tower Self-anchored Suspension Bridge is studied, the conception of materials consumption with structural parameters and mechanical property is established. And the effects of the material of girder, rise-span ratio, side to center span ratio for the total cost are studied. Come to the conclusion that changing the material of girder has much impact on the cost of three-tower self-anchored suspension bridge; Increasing the rise-span ratio can reduce the cost of main cable significantly; The side to center span ratio should be the largest value in the reasonable scope when the total length of a bridge has been defined.