Single tower cable-stayed bridge model test system based on damage identification

Abstract

The invention relates to a single tower cable-stayed bridge model test system based on damage identification for the field of bridge test science. The test system comprises a single tower cable-stayed bridge model, a lever loading system and a cable tension test system, wherein the single tower cable-stayed bridge model comprises a main bridge, a main tower, a stayed cable, a support, a base and a support upright which are assembled together; the lever loading system comprises a gantry device, a lever device and a lintel device, wherein the gantry is transversely arranged above the main beam of the single tower cable-stayed bridge model, and the lintel device is placed on the main beam of the single tower cable-stayed bridge model; and the cable tension test system comprises an anchoring screw, a leveling block, a pressure ring sensor and an adjusting nut which are mounted in a cable beam anchoring area. According to the invention, model tests for the dynamic and static performance ofthe cable-stayed bridge and experimental studies on the damage identification method of the cable-stayed bridge structure can be performed; and moreover, real-time and quick measurement of the cable tension can be realized without changing the cable rigidity, and thus the problem of difficult measurement of cable tension in the cable-stayed bridge model is solved.

Description

technical field [0001] The invention relates to a model test system of a single-tower cable-stayed bridge based on damage identification, which is suitable for the field of bridge test science. Background technique [0002] Model test research is one of the important means for bridge engineers and bridge science and technology workers to determine and explore the stress state of complex bridge structures. As early as 1755, in order to build a wooden bridge on the Rhine, the German engineer Gleibermann first used experimental methods to verify the reliability of the design. Since the 1950s and 1960s, with the vigorous development of bridge construction, my country has gradually started the model test research of bridge structures. For complex bridge structures, the Academy of Bridge Science and Engineering was the first to conduct test research. As early as the early 1970s , conducted a model test study on my country's first simply supported steel truss bridge with the larges...

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned cable-stayed bridge model test system is to verify the safety of the bridge construction process and the safety and reliability of the bridge after the completion of the bridge, and to test the correctness of the design theoretical parameters and theoretical calculations. The model test of the cable-stayed bridge based on the purpose of damage identification is not available. At the same time, the existing model bridges are all in the form of double towers or multiple towers, the main girder is mostly processed by casting, and the loading system is mostly selected under the main girder. The test is mainly aimed at the static and dynamic characteristics of the cable-stayed bridge structure.

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