Analysis of the influence of cable position on the structure of prestressed arch pipe truss
In large-span spatial structures,prestressed pipe truss is a commonly used structural form.Due to the introduc-tion of prestressed cables,it can optimize the internal force of the structure to the maximum extent,increase the vertical stiffness of the structure,and reduce the horizontal thrust of the support.The reasonable position of the cable directly af-fects the rationality of the overall stress on the structure and the amount of steel used.This article takes the greenhouse of a prestressed pipe truss yard in Chongqing as an example.By adjusting the position of the cables within a limited range,selecting multiple structural control indicators for comparison,the influence of the calculation results on the overall struc-ture is studied,and a more reasonable cable layout is determined.The analysis results indicate that,based on the reverse bending point,adjusting the position of the cable upwards increases the support reaction force and deflection,the maxi-mum internal force of the rod will also correspondingly increase.In practical engineering,it is recommended to determine the height of the reverse bending point through a single line model according to the structure's shape,and according to the requirements of the process,it is appropriate to be within the range of two nodes above and below this position.
万方数据
维普
