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An inclined bridge seismic damper and its parameter optimization method

An optimization method and damper technology, applied in bridges, bridge parts, bridge construction, etc., can solve the problems of difficulty in the structural design of horizontal wind-resistant bearings and large lateral seismic force of tower columns

Active Publication Date: 2018-09-07
CHINA RAILWAY BRIDGE SCI RES INST LTD +2
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Problems solved by technology

When an earthquake occurs, the viscous damper will constrain the longitudinal displacement of the main girder of the bridge; however, the lateral seismic force of the tower column will be relatively large, and the transverse wind-resistant bearing needs to adapt to the longitudinal displacement of the main girder, so that the lateral anti-wind The structural design of the wind support has certain difficulties

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  • An inclined bridge seismic damper and its parameter optimization method
  • An inclined bridge seismic damper and its parameter optimization method
  • An inclined bridge seismic damper and its parameter optimization method

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Embodiment Construction

[0042] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0043] see figure 1 As shown, the parameter optimization method of the inclined bridge seismic damper in the embodiment of the present invention includes the following steps:

[0044] S1: Establish a dynamic finite element model of the bridge, calculate the transverse seismic dynamic response results and longitudinal seismic dynamic response results of the bridge according to the bridge dynamic finite element model, and turn to S2.

[0045] The horizontal seismic dynamic response result in S1 is the dynamic response result of the bridge under horizontal + vertical seismic action, and the longitudinal seismic dynamic response result is the dynamic response result of the bridge under vertical + vertical seismic action.

[0046] S2: According to the results of lateral seismic dynamic response, the lateral equivalent damping coefficient C of an o...

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Abstract

The invention discloses an oblique type bridge anti-seismic damper and a parameter optimization method thereof, and relates to the technical field of bridge seismic resistance. The parameter optimization method comprises the following steps: establishing a bridge dynamic finite element model, calculating and obtaining a horizontal seismic dynamic response result and a longitudinal seismic dynamic response result of a bridge; optimizing a horizontal equivalent damping coefficient Ct, a longitudinal equivalent damping coefficient C1 and a speed index alpha of the oblique type bridge anti-seismic damper; calculating an oblique included angle beta and a damping parameter C of the oblique type bridge anti-seismic damper; and outputting the equivalent damping coefficient Ct, the longitudinal equivalent damping coefficient C1, the speed index alpha, the damping parameter C and the oblique included angle beta which satisfy the practical bridge design requirement. According to the oblique type bridge anti-seismic damper and the parameter optimization method thereof provided by the invention, when the bridge has a horizontal seismic action and a longitudinal seismic action, the oblique type bridge anti-seismic damper can play a role in damping energy dissipation, so that an effect of using only one set of oblique type bridge anti-seismic damper to control the longitudinal and horizontal seismic actions synchronously can be achieved.

Description

technical field [0001] The invention relates to the field of bridge anti-seismic technology, in particular to an obliquely placed bridge anti-seismic damper and a parameter optimization method thereof. Background technique [0002] With the development of my country's bridge design and construction technology and the needs of economic development, a large number of long-span bridges have been built; cable-stayed bridges are one of the preferred options for long-span bridges. In order to extend the period of bridge structures and reduce the impact of tower columns under earthquake Internal force, full floating system cable-stayed bridges are more and more widely used. However, due to the less constraints of the fully floating system cable-stayed bridge, the longitudinal and transverse displacements of the main girder of the cable-stayed bridge under the earthquake are relatively large, so it is necessary to take corresponding measures to control the displacement of the main gi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50E01D19/00
CPCE01D19/00G06F30/23
Inventor 汪正兴王波叶翔黄志贤柴小鹏荆国强马长飞高阳李东超刘鹏飞王翔蔡欣
Owner CHINA RAILWAY BRIDGE SCI RES INST LTD
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