The Stress Analysis And Construction Control Of High Piers And Long Span Continuous Steel Bridge On Shanmu River

At present, a lot of high piers of long-span prestressed concrete continuous rigid frame bridges are built in the domestic many regions, especially in the western plateau and many other mountain hilly region, this bridge is more popular. The big spanning capacity superiority of high piers of long span continuous rigid in mountainous highway, railway construction displays incisively and vividly. At the same time, the continuous rigid-framed bridge itself also has the characteristics of complex loading,Construction state changeful,and so on. So it is necessary to analyse the internal force and the stress changes system of mechanical behavior caused by adopting high piers structure form in the design and construction of the bridge, so as to ensure the safety in the construction structure, also make force comply with the design requirements. Combined with these analyses above, with the fir creek bridge as engineering background, this paper mainly studies include:Firstly, this paper briefly introduces the development of long-span continuous rigid frame Bridges and structural features. According to the structure form of various parts of Chinese fir creek bridge, each part of specific construction process characteristics are emphatically discussed.Secondly, this paper expounds the basic characteristics of the finite element analysis method, studies static analysis of finite element method of the bridge structure, analyzes the construction stress in different load conditions by using the large bridge finite element analysis software "Midas/Civil", and compares the internal force of the pier girder changes of the bridge in a different construction stage and different load conditions.Finally, after reviewing the bridge construction control of the main content and the construction control method, combined with the concrete monitoring process of Chinese fir creek bridge, this paper specifically analyzes the structure section stress monitoring of Chinese fir creek bridge, and then evaluates the bridge's actual stress state and provides basis for construction safety.