Variable-stiffness combined support

A technology of variable stiffness and bearings, which is applied to bridge parts, bridges, buildings, etc., can solve the problems that seismic bearings cannot adapt to large earthquakes and have short service life, and achieve the effect of small deformation and improved seismic performance

Pending Publication Date: 2018-10-02
SICHUAN DEPT OF TRANSPORTATION HIGHWAY PLANNING PROSPECTING & DESIGN RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the existing anti-seismic bearings cannot adapt to larger earthquakes and have a shorter service life. To solve the above problems, the present invention provides a variable stiffness composite bearing

Method used

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  • Variable-stiffness combined support
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  • Variable-stiffness combined support

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as Figure 1-3As shown, a variable stiffness composite support includes a support top plate 1 and a support bottom plate 2, and at least one rigid support member 3 and at least one elastic support member 4 are arranged between the support top plate 1 and the support bottom plate 2 The upper and lower surfaces of each elastic supporting member 4 are respectively fixedly connected to the support top plate 1 and the support bottom plate 2 .

[0036] The variable stiffness composite support includes at least one rigid support member 3 and at least one elastic support member 4 arranged between the support top plate 1 and the support bottom plate 2, wherein one of the upper and lower surfaces of the rigid support member 3 is One is fixed connection, one is contact connection (non-fixed connection).

[0037] Each of the above-mentioned elastic supporting members 4 is a structural member of a rubber composite elastic body 41 . The upper and lower surfaces of each rubber ...

Embodiment 2

[0043] Such as Figure 4-5 As shown, the present invention also provides a kind of bridge, comprises several piers 7 of different heights and the main girder 8 that is arranged on the top of the pier 7, and each two ends of the main girder 8 are connected to the bridge pier by variable stiffness combined bearings respectively. 7 are connected to each other, wherein the horizontal stiffness of the elastic supporting member 4 of the bridge pier 7 and the main girder 8 connected to the higher bridge pier 7 is greater, and the elastic support member 4 of the lower bridge pier 7 and the main girder 8 is connected. The horizontal stiffness of the support member 4 is smaller.

[0044] The horizontal stiffness value of the support on each pier 7 is inversely proportional to the distance between the zero point of displacement of the main girder 8. The definition of the zero point of displacement of the main girder 8 is that when the temperature changes, the concrete shrinks and creeps,...

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Abstract

The invention discloses a variable-stiffness combined support. The variable-stiffness combined support comprises a support top plate and a support bottom plate; at least one rigid supporting member and at least one elastic supporting member are arranged between the support top plate and the support bottom plate; and the upper and lower surfaces of each elastic supporting member are fixedly connected to the support top plate and the support bottom plate. According to the variable-stiffness combined support, vertical stiffness is provided by using the rigid supporting member, and the horizontalstiffness of the support is adjusted by using the elastic supporting member. The variable-stiffness combined support can be applied to the existing bridges with seismic requirements, in particular bridges with different pier heights; the composite stiffness of piers and the support can be adjusted so that the integral stiffness of each pier and the support is balanced, the position changing is coordinated and unified, and the anti-seismic property of the bridge is greatly improved; and the variable-stiffness combined support can also be applied to the technical field of other buildings and water conservancy projects.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a variable stiffness composite support. Background technique [0002] Earthquakes can severely damage bridges, buildings and other construction projects, causing huge losses in people's lives and property. Therefore, anti-seismic technology is an important technical field in the construction of bridges, buildings, and water conservancy projects. Generally, the dynamic response of engineering structures under the action of earthquake forces can be obtained in a timely manner by adopting methods such as isolation, shock absorption, and adjustment of structural dynamic characteristics. Effective control to ensure the safety of the structure itself. [0003] The use of anti-seismic bearings is an effective measure to improve the anti-seismic performance of structures. At present, the representative anti-seismic bearings in China include: lead core rubber bearings, high da...

Claims

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Application Information

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IPC IPC(8): E01D19/04
CPCE01D19/041
Inventor牟廷敏伍大同范碧琨李胜赵艺程罗启孙才志康玲梁健
OwnerSICHUAN DEPT OF TRANSPORTATION HIGHWAY PLANNING PROSPECTING & DESIGN RES INST