Control system of bridge provided with viscous dampers and control method thereof

Abstract

The invention discloses a control system of a bridge provided with viscous dampers and a control method of the control system. The control method comprises the following steps that 1, the viscous dampers are installed between piers and beam ends of the bridge in advance; the viscous damper comprises a cylinder body and a piston capable of moving in the cylinder body in a reciprocating mode, the piston is provided with a plurality of channels communicated with the two sides of the piston and switch assemblies with the same number as the channels, and each switch assembly comprises a switch piece used for connecting or disconnecting the corresponding channel and a driver connected with the switch piece; 2, current motion parameters of the beam end are collected; and 3, the number of channelsto be cut off is calculated according to preset reference motion parameters and the acquired current motion parameters, and a driving signal is generated to control a driver to drive a switching piece to switch on or switch off the corresponding channel. The invention aims to drive each driver to connect or disconnect each channel according to the motion state of the detection beam end, dynamically adjust the damping force and reduce the longitudinal accumulated displacement of the beam end.

Description

technical field [0001] The invention relates to the technical field of bridge design, in particular to a control system and a control method for a bridge equipped with a viscous damper. Background technique [0002] The girder ends of the stiffened girders of long-span suspension bridges undergo significant longitudinal displacement under the action of vertical live loads, which is a characteristic of the structure itself. Taking the driving of a car on the main girder as an example, unlike wind load or earthquake load, the driving of a car is a daily behavior, so the longitudinal displacement of the beam end is continuous, that is, there is a vehicle running on the suspension bridge, then the main girder of the suspension bridge will be uninterrupted The longitudinal reciprocating movement of the ground also leads to a large cumulative displacement of the beam end of the main beam. [0003] The hazards of frequent longitudinal reciprocating and large movements of the main ...

AI Technical Summary

Problems solved by technology

Taking the driving of a car on the main girder as an example, unlike wind load or earthquake load, the driving of a car is a daily behavior, so the longitudinal displacement of the beam end is continuous, that is, there is a vehicle running on the suspension bridge, then the main girder of the suspension bridge will be uninterrupted The longitudinal reciprocating movement of the ground also leads to a large cumulative displacement of the beam end of the main beam

[0003] The hazards of frequent longitudinal reciprocating and large movements of the main girder are mainly manifested in the substantial deterioration of the bearings, expansion joints, and suspension bridge cables, seriously affecting their durability, reducing the service life of the bearings, expansion joints, and suspension bridge cables, and increasing the operation of the suspension bridge. security risk during

[0004] In the prior art, longitudinal limit devices are mostly installed at both ends of the main beam to reduce the maximum displacement of the beam end. However, these longitudinal limit devices have a limited reduction in the cumulative displacement of the beam end. For example, the patent number is ZL201611992980.7 , the authorized invention patent titled "a bridge equipped with a viscous damper", which solves the technical problem that the abutment structure cannot bear the huge tension under the dynamic load, making the abutment easy to damage and poor in structural stability

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