Study On Construction Control And Structure Performance Of Single Tower Asymmetric Low Pylon Cable-stayed Bridge

Taking the construction of the Changwan Lishui Bridge as the engineering background,this paper calculates the influence of the design parameters such as the length of the cable-free zone and the pylon height on the structure stress.To deal with the problem of large force on the main pier of the the low pylon cable-stayed bridge,dampers are installed in the abutments on both sides.Analyzing the seismic response of the low pylon cable-stayed bridge and the damping effect of the hydraulic damper.The main contents are as follows.This article first briefly introduces the origin,the development status,the structural characteristics,and the current status of construction control of the cable-stayed bridge with a low tower.Taking Changwan Lishui Bridge as the background project,and using the structural finite element software Midas civil 2015 to establish the project’s calculation model.The analysis of the internal forces and deformations of the main girder under the following stages,the maximum twin cantilever and the bridge finished ten years and using phase.The design of the background bridge was proved to be reasonable and the performance of the force was demonstrated to be good.It provides a reference for relevant basis for construction control.Based on the model of the background bridge,this paper changes the supporting conditions between piers and beams,the length of the cable-free end of the beam,the length of the cable-free area of the tower,and the height of the tower without changing other design parameters.By changing the support condition between the piers,the length of the cable-free zone at the end of the beam,the length of the cable-free zone and the pylon height,the internal force and deformation of the structure and the variation of cable tension are analyzed.This paper discusses the reasonable range of length and pylon height of cable-stayed bridge with single tower asymmetric low pylon,The data shows that when the pier beam is fixed,the structural stress is more reasonable.Hydraulic dampers are installed on both sides of the bridge in the low pylon cable-stayed bridges.This paper calculates the seismic response of the Changwan Lishui Bridge under the action of three seismic waves,analyzes the relative parameters of the hydraulic dampers,changes the internal force response and displacement reaction of the low pylon cable-stayed bridge,and discusses a set of damper parameters suitable for the Changwan Lishui Bridge.