Assembled two-tower cable-stayed bridge damage identification test model system

Abstract

The invention discloses an assembled two-tower cable-stayed bridge damage identification test model system, which consists of a two-tower cable-stayed bridge test model, a moving load system and a data acquiring system, wherein the two-tower cable-stayed bridge test model consists of a girder, cable bent towers, stay cables, a support seat and bases, and the girder is formed by splicing sections with different lengths; the moving load system is a vehicle model controlled by a wireless remote control device, and weights are fixed on the moving load system; and the data acquiring system comprises a cable force testing system, a displacement testing system and an acceleration testing system. According to the system disclosed by the invention, the model experiments of dynamic and static performances of a cable-stayed bridge structure can be completed, and at the same time various damage states of the cable-stayed bridge structure under an actual situation can be conveniently simulated; the arrangement of counter weights can be adjusted according to the test requirement; an unsmooth driving situation of a vehicle on a bridge surface can be simulated; the loading of moving load is realized; and the data acquiring system is comprehensive, simple, convenient, economical, real-time and reliable in precision.

Description

technical field [0001] The invention relates to the field of bridge tests, in particular to a cable-stayed bridge test model system used for verification of damage identification algorithms. Background technique [0002] The cable-stayed bridge structure has the advantages of small self-weight, high rigidity, clear force, and obvious economic advantages. It occupies an important position in modern bridge structures because of its large spanning capacity, good technical and economic indicators, and aesthetic value. [0003] After the cable-stayed bridge is completed, it will continue to be affected by normal loads, environmental loads, material aging, corrosion effects and other factors, which will lead to long-term damage accumulation and resistance attenuation of the structural system. In extreme cases, catastrophic accidents may occur. Therefore, in order to ensure the integrity and safety of the structure, it is of great significance to carry out damage identification on ...

AI Technical Summary

Problems solved by technology

[0009] Most of the cable-stayed bridge models introduced above for the verification of damage identification methods are aimed at single-tower double-span cable-stayed bridges, but rarely involve the most common double-tower and three-span cable-stayed bridges; the damage conditions that can be simulated are single, and cannot Carry out multi-damage verification; most of the main beams of the models do not have counterweights, and the counterweights of the models involving counterweights are not reliably connected to the main beams, and the dynamic response is lagging, so the rationality is open to question; at the same time, the verification of the damage identification method under moving loads has not been done. involved

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