Tilt Single Tower Cable-stayed Bridge Main Tower Arch Angle Design Research

The Cable-stayed bridge is a kind of economic,reasonable,beautiful bridge.With the use of high-tech materials,the structural analysis method of progress,cable-stayed bridge got rapid development in the 1990 s.Yet for this kind of one of the key issues of the configuration,the Leaning Tower of Pisa tilt Angle problem of the current study is not thorough,so for this problem are studied in this paper.This paper first reviews the general situation of the development of single tower cable-stayed bridge,and briefly analyzed the structure characteristics and research status of single tower cable-stayed bridge,summarizes and compares the cable-stayed bridge reasonable into completed bridge method.This article USES the MidasCivil software landscape of the bridge model is established,the influence matrix method is adopted to bridge into a completed bridge calculation.Using,control the function of the unknown load factor in the use of force and displacement,internal force is zero and the minimum maximum as constraint conditions,and the minimum error can satisfy the constraint conditions within the scope of the best load coefficient,and then,according to the unknown load coefficient of cable,cable is calculated based on the influence matrix method at the beginning of the pulling force.With MIDAS/CIVIL finite element software for the platform,with 5° respectively set up bridge tower for differential Angle 60 °,65 °,70 °,75°,80°,85°,90°MIDAS/CIVIL model,analyses the landscape bridge,extraction displacement calculation,and the key section for example,in the midspan cross beam at the top of the column location,location,in the short-term load combination and long-term load under the combination of displacement is analyzed and compared.The following conclusions are drawn,for example,in the case of beam,in the midspan cross to temperature change,vertical wind load and horizontal wind load sensitive;And for tower,temperature load has a little influence on displacement of the top of the tower.Displacement of the composite beam and tower,bridge tower Angle is 75° of cable-stayed bridge,main beam deflection is small,the deformation is small.Beam consolidation point,remain the state of bending,cable-stayed bridge pylon Angle is 75° its mechanical performance is good,bridge tower cable-stayed bridge is 60° from the Angle of its poor mechanical properties;In general,the closer the bridge tower Angle 75°,its mechanical performance is better.