The Study Of Force Analysis Of Large-Span Self-Anchored Suspension Bridge In Construction Stages

With the increase of bridge span of the anchor suspension bridge, the axial stress of the beams increase and the characteristics of system transformation is more difficult, and has become the design key points of control, the construction of a long-span self-anchored suspension bridge will face greater challenges. Therefore, improve the material strength, increase spanning capacity, reduce the constant load, research and development of new materials, as well as convenient system transformation and speed up the construction progress and so on, is the important topic in the future research. This article has carried on stress analysis of the construction stage of the anchor suspension bridge and the application research of stress free state laws in the anchor s uspension bridge construction stage, research work and conclusions are as follows:①Discusses the three calculation theory of anchor suspension bridge calculation method: Theory of elasticity, the deflection theory, the finite displacement t heory. Due to the finite element analysis calculation easier, the accuracy also is very good. This paper adopts finite element analysis method study.②Using large-scale finite element software MIDAS established the finite element model of anchor suspension bridge in jilin songyuan tianhe, this paper discusses the principle of the unit to select and the process of modeling.③Under the action of self-respect and moving loads, by using the theory of finite element calculation and large finite element software, has carried on the stress analysis of the large span spatial cable anchor suspension bridge in construction stage, obtain parameter change rule of various typical location, inc luding the internal force, reaction force, bending moment and displacement of the suspension bridges, etc..④By applying the method of no stress state research the load effect of anchor suspension Bridges, discusses the application of the method of no stress state in the anchor suspension bridge construction stage, indicates that the feasibility of application of the method of no stress state in anchor suspension bridges.⑤Articles research the boom tensioning of anchor suspension bridge in the anchor suspension bridge construction stage, which simplified the construction procedure, and this method can accelerate the process of construction.Case is special used in this paper, since it is a large span space cable anchor suspension bridge, and the structure characteristics of the large span space cable anchor suspension bridges are new compared to the structural characteristics of anchor suspension bridges which is novel.Article also put forward to solve the anchor engineering practical problems by using new thoughts and new methods of suspension bridges. O n the one hand, there can be from another angle on the anchor suspension bridge construction control, after the no stress concept of construction method be introduced; O n the another hand, combining of the method of sling tensioning order and no cable saddle adjustment, in the process of the anchor suspension bridge construction provides a new thought.