Research On Key Technology Of Curved Rigid Tower Cable-stayed Bridge With Curved Rigid Frame System

The low tower cable-stayed bridge is a new bridge type developed on the basis of continuous girder bridge and cable-stayed bridge.The bridge also has the advantages of continuous beam bridge and cable-stayed bridge.In recent years,the low tower cable-stayed bridge has been widely used in practice,especially in the span of 100 m to 300 m between the very competitive.At present,the low-tower cable-stayed bridge is a new type of bridge,and the construction is mostly large,but mostly straight-line low-tower cable-stayed bridge.The curve-shaped low-tower cable-stayed bridge has only one Longjing River bridge in China.In order to solve the key technical problems encountered in the design of Longjing River Bridge,this paper discusses the key technical problems in the design of Longjing River Bridge.In this paper,the key technical problems encountered in the design of Longjing River Bridge are discussed.On the basis of previous studies,the Longjing River Bridge is based on the research work carried out,the specific contents are as follows:(0),0 °,10 °,20 °,30 °,40 °,50 ° finite element model were established by using the bridge analysis software Midas civil in the Longjing River Bridge,Guizhou Province.The influence of the center angle of the main beam on the tower,the beam,the pier and the stay cable of the low tower cable-stayed bridge is studied,and the larger the center angle of the main beam is obtained.Effect and torque of the greater impact of the conclusion.(2)By simulating the imbalance force on both sides of the stay cable in the real bridge,the micro-motion of the unilateral bidirectional interchangeable anti-slip anchoring device under unbalanced force is studied,and the reliability of the device is verified.1.25 times the design load to meet the design requirements of anti-skid,with a reliable anti-skid performance.(3)By simulating the single cable-changing process of the cable strut in the operation phase of the bridge,it is ensured that the cable-stayed system can realize the single cable for the cable stayed in the bridge operation stage.(4)The stress analysis of the anchorage zone of a cable with the largest force of the roof of the Longjing River Bridge is carried out by means of finite element software.The actual working state and stress distribution of the structure are obtained,and the low tower cable Stress Distribution Law of Anchorage Zone in Tower.