Side span shape finding method adopting resultant force control in horizontal plane

A horizontal plane and side span technology, applied in data processing applications, instruments, electrical digital data processing, etc., can solve the problem of lateral inclination of bridge towers, tension of girder beams of portal towers, failure to obtain theoretical vertices of loose cable saddles or reasonable transverse direction of anchor points Position and other issues, to achieve the effect of simple design
CN110990913AActive Publication Date: 2020-04-10CHINA MAJOR BRIDGE ENERGINEERING
6 Cites 11 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA MAJOR BRIDGE ENERGINEERING
Publication Date
2020-04-10

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a side span shape finding method adopting resultant force control in a horizontal plane. The method comprises the following steps: taking a vertical component force of a side span main cable at a theoretical vertex as an iterative variable, taking a vertical coordinate of the theoretical vertex or an anchoring point at a splay saddle as an iterative target, adding a new control item, i.e., an included angle between a resultant force in a horizontal plane and a longitudinal axis of a side span end part, and carrying out loop iteration on a side span cable system until aprecision requirement is met. According to the side span shape finding method, it is guaranteed that the longitudinal component force and the transverse component force of the cable force on the towertop are equal, in other words, the resultant force in the horizontal plane is equal, the bridge tower can be completely vertical, the obtained side span line shape and the obtained middle span line shape do not have folded angles on the tower top, and the transverse coordinates of the theoretical vertex or the anchoring point of the splay saddle can be accurately calculated. When the bridge forming state of the space cable suspension bridge is determined, the side span shape finding method controlled by the resultant force in the horizontal plane is successfully applied to the design of a large canyon glass bridge with the main span of 430 m.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of reasonable alignment analysis of bridges in the design of suspension bridges, in particular to a form-finding method for side spans controlled by resultant force in a horizontal plane. Background technique

[0002] The space cable suspension bridge is a three-dimensional cable system composed of the space main cable and the transversely inclined suspension cables. Compared with the planar cable suspension bridge, the space system greatly improves the lateral stiffness and torsional stiffness of the structure, and improves the dynamic stability of the structure. In addition, the space cable suspension bridge has a beautiful appearance and is being popularized and applied in municipal and scenic bridges, such as the Zhangjiajie Grand Canyon Glass Bridge.

[0003] When designing a suspension bridge, the bridge alignment analysis should be carried out first to determine the reasonable bridge alignment. At pre...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More