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混凝土斜张桥的抗风稳定性、活载引起的挠度、耐久性或经济性等,这些同钢斜张桥相比都具有有利的方面。但是,同钢斜张桥相比,其建成的桥还是较少。这是因为混凝土斜张桥是混凝土构件和钢构件的组合结构,由混凝土的徐变而引起结构体系各部较大的截面内力变化是难以对付的,如何对其评价和控制是设计上的重要问题,也是混凝土大跨度桥梁中的共同问题。本文还介绍了组合结构、徐变、PC拉索、设计和施工的关联等问题的研究现状,提出我国需要研究的问题,这些都是设计和施工中需要解决而又十分麻烦的问题。
Wind-resistant stability of concrete diagonal bridge, deflection caused by live load, durability or economy, etc., which have advantages compared with steel oblique bridge. However, compared with steel oblique bridge, the bridge built or less. This is because concrete slanting bridge is a combination structure of concrete members and steel members. It is difficult to cope with the large cross-sectional internal force changes caused by the creep of concrete. How to evaluate and control them is an important design issue , Is also a common problem in concrete long-span bridges. This paper also introduces the research status quo of the combination structure, creep, PC cable, the design and construction of the relationship between the issues that China needs to be studied, these are the design and construction needs to be solved and very troublesome problems.