Simulation test device and method for waterway of cable-stayed bridge inhaul cable

Abstract

The invention relates to a simulation test device and a method for a waterway of a cable-stayed bridge inhaul cable. The device is characterized in that two ends of a test stayed cable are respectively connected to upper and lower borders of a quadrangular steel frame through upper and lower two suspension springs; an arch-shaped strain type sensor is serially connected in the lower suspension spring; the two ends of the stayed cable are provided with acceleration meters and are fixedly connected to connecting rods of dampers; the dampers are fixed on the side frame of the steel frame; one corner on the lower part of the steel frame is hinged with a turntable; a jack is arranged between the lower border of the steel frame and the turntable; a water injection device is arranged above the suspension cable; and a camera is arranged above the side frame of the steel frame. The device can be used for accurately testing the waterway of the cable-stayed bridge inhaul cable, is high in testing precision and has simple structure, thereby supplying reliable and objective accordance for studying the raining vibration phenomenon of the cable-stayed bridge and supplying reliable guarantee to the design and construction of the cable-stayed bridge.

Description

technical field [0001] The invention relates to a rain vibration test device for cable-stayed bridge cables, in particular to a simulation test device and method for cable-stayed waterways of cable-stayed bridges. Background technique [0002] Cable-stayed bridges are an important structural form of modern long-span bridges, especially when erecting super-large bridges with long spans across canyons, bays, large rivers, and large rivers where piers are not easy to build, suspension bridges or cable-stayed bridges are often selected. The cable-stayed bridge is composed of cable-stayed cables, cable towers, main girders, and bridge deck. The key component of the force. [0003] The study found that the cable-stayed bridge has the phenomenon of rain vibration: that is, within a certain wind speed range, the large-amplitude vibration of the cable-stayed bridge (cable-stayed cable) in a certain attitude is caused by the combined effect of wind and rain. Long-term large-scale vi...

AI Technical Summary

Problems solved by technology

Its disadvantages are: in order to obtain accurate and reliable data, this method requires a large number of high-precision detectors, the test cost is high, and too many detectors on the cable surface will affect the aerodynamic characteristics of the stay cable, resulting in large errors in test results ; The limited number of detectors cannot guarantee that the water flow at every point will flow through the probe of the detector, which will affect the test accuracy

This method has the following problems: the ultrasonic detector needs to move along with the waterway inside the stay cable, and it is difficult to implement; the ultrasonic wave is reflected multiple times by the stay cable through the filling material, cable, cable sleeve, waterway, etc., and there will be waves during this period. Diffraction, interference, etc., lead to large errors in the data received by the ultrasonic detector, and the final received waterway signal is weak, and the reducibility is poor

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