Five-freedom-degree earthquake simulation vibrating table for on-bridge railway tracks

Abstract

Provided is a five-freedom-degree earthquake simulation vibrating table for on-bridge railway tracks. The end portion of each bridge body of a bridge is arranged on a side plate of a box type base, and the tracks are installed on the upper surface of the bridge bodies. a horizontal electro-hydraulic servo actuator, a left-side vertical electro-hydraulic servo actuator and a right-side vertical electro-hydraulic servo actuator are hinged to a base plate of the box type base. The actuating end of the horizontal electro-hydraulic servo actuator is sequentially hinged to the side faces of the bridge bodies of the bridge through a vertical connecting rod and a horizontal connecting rod, and the middle of the vertical connecting rod is further hinged to a support block of the box type base. The actuating ends of the left-side vertical electro-hydraulic servo actuator and the right-side vertical electro-hydraulic servo actuator are hinged to the bottoms of the bridge bodies. The five-freedom-degree earthquake simulation vibrating table can achieve five-freedom-degree movements including vertical translation, horizontal translation, rolling, nodding and shaking of the tracks, completely simulate seismic waves of the on-bridge railway tracks and large road distortion deformation caused by an earthquake and further obtain incentive data of the seismic waves, and provides an important test basis for railway train operation safe and structural earthquake-resistant design and safe operation management.

Description

technical field [0001] The invention relates to a five-degree-of-freedom earthquake simulation shaking table for a railway track on a bridge. Background technique [0002] Earthquake is a sudden violent movement of the earth's crust. Many earthquakes of different magnitudes occur every year around the world. Especially in recent years, the earth's crust has been very active. my country's earthquakes have high frequency, high intensity, shallow focus and wide distribution. , is a country severely affected by earthquakes. Since the 20th century, earthquakes of magnitude 7 or above have occurred on average twice every three years. Earthquakes, especially earthquakes with large magnitude and energy, bring serious losses to people's lives, infrastructure and public facilities. For railways, when a large earthquake occurs, the huge energy will cause the road surface to crack, the track to bend, and even cause the train to derail. Especially for trains running on bridges, bridges ...

AI Technical Summary

Problems solved by technology

Especially for trains running on bridges, bridges are more likely to crack and collapse when an earthquake occurs, causing serious accidents; and high-speed railways generally use viaduct structures, and the bridge sections that trains pass through account for a large proportion. In order to ensure the safety of high-speed trains It is very necessary to study the influence of earthquake disaster conditions on the safety of train operation, and carry out experimental research on the safety performance of train operation under earthquake disaster conditions

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