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由于桥位区复杂建设条件的限制,嘉绍大桥无法采用大刚度索塔形式解决结构刚度问题,在采用弱塔结构的情况下,如何解决好中间塔结构受力和主梁刚度问题,是多塔斜拉桥能否顺利实施的关键。通过分析多塔斜拉桥结构体系响应特点,提出一种新型的多塔斜拉桥结构体系——双排支座体系,同时研究该体系中双排支座间距对结构各力学响应的影响,提出顺桥向双排支座的合理间距。
Due to the limitation of the complex construction conditions in the bridge area, the Jushao Bridge can not solve the structural rigidity problem with the form of a large-stiffness tower. In the case of a weak tower structure, how to solve the stress of the intermediate tower structure and the rigidity of the main beam is more Cable-stayed bridge can be successfully implemented the key. By analyzing the response characteristics of the multi-tower cable-stayed bridge system, a new type of multi-tower cable-stayed bridge structure system - double-row bearing system is proposed. Meanwhile, the influence of double-row bearing spacing on the mechanical response of the system is studied. Proposed to the bridge to the double-row bearing reasonable spacing.