A new method for fast and precise cable adjustment of cable-supported bridges

Abstract

The invention relates to a new type of fast and precise cable adjustment technology for cable-supported bridges. Taking into account the geometric nonlinear effect of the structure, a certain initial tension is applied to the cables to determine the initial state of the calculation; As the main tuning vector, the finite element calculation is carried out by rotating the main tuning vector successively, and the parameters such as the incremental effect matrix and boundary matrix of the internal force or displacement of the concerned section are determined compared with the initial state of the calculation; the numerical optimization theory is used to establish constraints and target optimization The function solves the optimal cable force that meets the user's requirements. The invention can quickly, efficiently and accurately determine the reasonable cable force value of the target state of the cable-supported bridge, so that the displacement accuracy of the mid-span main girder is within 10mm. This technology provides a new solution for the determination of the cable force in the target state of the cable-supported bridge and the adjustment of the cable force in construction monitoring. Design monitoring.

Description

technical field [0001] The invention relates to a method for determining a reasonable cable force in an arbitrary target state of a cable-supported bridge, including a bridge-completed state, and in particular to a method for fast and precise cable adjustment of a novel cable-supported bridge. Background technique [0002] Cable-supported bridges such as cable-stayed bridges and arch bridges are all high-order statically indeterminate systems, and the geometric nonlinear effect of the structure is significant. Due to the large number of cables, it is difficult to determine a reasonable cable force. At present, there is no effective method to efficiently and accurately determine the reasonable cable force of the target state of the cable-supported bridge. Most engineering designers still use the traditional method of artificially correcting the cable force and substituting it into the finite element software for multiple trial calculations. It is abbreviated as Manual cable a...

AI Technical Summary

Problems solved by technology

[0002] Cable-supported bridges such as cable-stayed bridges and arch bridges are all high-order hyperstatically indeterminate systems, and the geometric nonlinear effect of the structure is significant. Due to the large number of cables, it is difficult to determine a reasonable cable force

At present, there is no effective method to efficiently and accurately determine the reasonable cable force of the target state of the cable-supported bridge. Most engineering designers still use the traditional method of artificially correcting the cable force and substituting it into the finite element software for multiple trial calculations. It is abbreviated as Manual cable adjustment method, the disadvantages of this method: low efficiency, poor precision, and not conducive to the design of super long-span cable-supported bridges

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