多塔悬索桥经济性能估算方法

Estimate Formulas for the Economic Performance of Multi-Tower Suspension Bridges

多塔悬索桥作为一种较为新颖的结构体系,在未来的桥梁工程中具有广阔的应用前景。在工程概念设计阶段,需要对不同方案进行比选,而方案的经济性能在很大程度上决定了比选结果。因此,针对多塔悬索桥经济性能,基于各构件的受力状态和材料的力学性能指标,推导了吊杆、主缆、加劲梁、桥塔、桩基、沉井基础以及锚碇的材料用量公式。并在此基础上,进一步考虑材料价格系数,得到了多塔悬索桥各构件及整体造价的函数。最后,结合某实际工程资料,对公式计算精度进行了验证。

Multi tower suspension bridge as a relatively new structural system,will be applied broadly in the future.In the conceptual design stage,different schemes need to be compared,and the economic performance of the schemes largely determines the results of the comparison.Hence,in this paper,according to the economic performance of multi-tower suspension bridge,based on the stress state and material mechanics index of each component,estimate formulas for the material cost of hangers,main cable,stiffening girder,tower,pile,caisson foundation and anchor were derived.On the basis,the total cost function as well as each component of the multi tower suspension bridge were obtained by further considering the material price coefficient.Finally,combined with a practical engineering data,the accuracy of the formulas was verified.