独塔斜拉桥钢塔竖转施工计算分析

竖转施工方法可降低索塔结构高空拼装难度,便于结构尺寸精度控制,提高焊接质量和工效,被广泛应用于斜拉桥施工。为分析独塔斜拉桥钢塔竖转施工过程中的受力状态,运用ANSYS软件模拟独塔斜拉桥竖转施工过程,计算钢塔在不同阶段的应力、变形和稳定性。结果表明,转体启动阶段和结束阶段钢塔受力状态最不利,应重点监测。在启动阶段,钢塔的变形较大,应作为主要控制监测指标。

Calculation and Analysis on Vertical Rotation Construction of Steel Pylon for Single-pylon Cable-stayed Bridge

The vertical rotation construction method can reduce the difficulty to assemble the cable and pylon structure in high altitude,which is easy to control the dimensional accuracy of structure,to improve the welding quality and work efficiency,and is widely applied in the construction of cable-stayed bridge.In order to analyze the stress state during the vertical rotation construction of steel pylon of single-pylon cable-stayed bridge,the ANSYS software is used to simulate the vertical rotation construction process of single-pylon cable-stayed bridge and to calculate the stresses,deformations and stabilities of steel pylon at the different stages.The results show that the stress states of the steel pylon is the most unfavorable in the starting and ending stages of the rotating body,which should be specially monitored.The deformation of steel pylon is larger during the starting stage,and should be taken as the main control and monitoring index.