Bridge structure dynamics testing device

Abstract

The invention discloses a bridge structure dynamics testing device, and relates to the technical field of testing. The bridge structure dynamics testing device comprises a base; the side wall of the upper end of the base is fixedly connected with a connecting piece; the upper end of the connecting piece is rotationally connected with a mounting table; a rotating mechanism is fixedly mounted on theside wall of the mounting table; two supports are fixedly connected to the side wall of the upper end of the mounting table. Through the use of a fixing mechanism, a bridge structure model is fixed on the device, and a driving motor is started to enable a rotating gear to rotate and drive the mounting table to rotate, so that a certain deflection angle is formed between the bridge structure modeland the air flow direction of a wind tunnel to monitor the vibration condition of the structure model in an oblique wind state; meanwhile, in order to enable the monitoring data to be more suitable for the actual situation, the vibration situation of the bridge structure model in the load state is monitored through position movement of a load trolley on the bridge structure model, and the situation that the deviation between the test data and the actual application situation is too large is avoided.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to a bridge structure dynamic testing device. Background technique [0002] With the continuous increase of the span of modern bridges, bridges become softer and more sensitive to wind. The problem of wind resistance has become a key issue in the construction of long-span bridges. Wind resistance design and wind-induced response of bridge structures When checking the calculation, the aerodynamic parameters of the bridge are an important basis, so the accurate measurement of the static aerodynamic parameters is a very important link. Usually, the wind tunnel test equipment is used to measure the aerodynamic parameters of the bridge model, but most of the existing test equipment is fixed and cannot be used. At the same time, due to the limitation of the wind tunnel test conditions, the incoming wind cannot be adjusted. Therefore, when the existing test equipment is used to study the w...

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Problems solved by technology

[0002] With the continuous increase of the span of modern bridges, bridges become softer and more sensitive to wind. The problem of wind resistance has become a key issue in the construction of long-span bridges. Wind resistance design and wind-induced response of bridge structures When checking the calculation, the aerodynamic parameters of the bridge are an important basis, so the accurate measurement of the static aerodynamic parameters is a very important link. Usually, the wind tunnel test equipment is used to measure the aerodynamic parameters of the bridge model, but most of the existing test equipment is fixed and cannot be used. At the same time, due to the limitation of the wind tunnel test conditions, the incoming wind cannot be adjusted. Therefore, when the existing test equipment is used to study the wind-induced vibration of long-span bridges under the action of wind load, it usually only considers the orthogonal wind. In special cases, in fact, the dominant wind at the bridge site often forms a certain deflection angle and attack angle with the direction of the bridge span, and the existing test device is in a no-load state during the test, which is different from the actual bridge use. There are certain differences, so we propose a bridge structure dynamics test device to solve the above problems

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