Fabricated large-span cable-stayed bridge power test system

Abstract

The invention relates to an assembly type large-span cable-stayed bridge power test system, which comprises an assembly type main beam, a plurality of stay cables and an assembly type bridge tower, and is characterized in that the assembly type main beam is suspended on the assembly type bridge tower through the plurality of stay cables to form a space stress system; the assembly type main beam is formed by meshing a plurality of main beam assembly modules and connected into a whole through transverse and longitudinal prestressed cables, and the mass adjusting systems are symmetrically arranged on the two sides of the assembly type main beam. A vertical stand column of the assembly type bridge tower is formed by connecting a fixing part and a plurality of stand column assembly modules in a mortise and tenon mode. Adjustment of the length, the width, the weight and the rigidity of the main beam is achieved by changing the number of main beam assembly modules, the mass of the mass adjusting system and the cable force of the prestress cable; the height and rigidity of the bridge tower are adjusted by changing the number of the stand column assembly modules; the dynamic characteristics of large-span cable-stayed bridges with different spans, different heights and different forms can be accurately simulated.

Description

technical field [0001] The invention relates to a dynamic test system of an assembled long-span cable-stayed bridge, belonging to bridge test devices. Background technique [0002] The cable-stayed bridge is a structural system formed by a combination of towers under pressure, cables under tension, and girders under bending. It has the advantages of light weight, low material consumption, and strong spanning ability, and has become the main form of long-span bridges. Since the 182.6-meter main span steel cable-stayed bridge over the New Sigurum Strait was built in Sweden in 1955, cable-stayed bridges have sprung up all over the world, with new spans. Completed in 2012, the world's longest-span cable-stayed bridge, the Russky Island Bridge, has a main span of 1,104 meters. Thanks to the development of material science and construction technology, cable-stayed bridges are constantly developing in the direction of ultra-long and ultra-flexible. [0003] Long-span cable-stayed...

AI Technical Summary

Problems solved by technology

[0005] In summary, the key parameters that determine the dynamic characteristics of the structure, such as the span, mass, stiffness, and tower height of the existing cable-stayed bridge test device, are fixed, and cannot be used according to different cable-stayed bridges. Adjust the structural parameters of

However, in order to meet the needs of traffic and safety, the structural parameters such as span and height of long-span cable-stayed bridges in actual projects are ever-changing, and the redesign of the cable-stayed bridge test device has disadvantages such as high cost and long period.

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