阅读说明：本技术 一种适用于桥梁承台基础的型钢减震结构 (Shaped steel shock-absorbing structure suitable for bridge cushion cap basis ) 是由 刘旭锴 张强 谢斌 孙东利 董礼 于 2021-07-13 设计创作，主要内容包括：本发明公开了一种适用于桥梁承台基础的型钢减震结构,包括桥墩,所述桥墩的底部固定浇筑有承台,所述承台底部均布的固定设置有桩基础,所述承台由上承台和下承台构成,上承台与下承台之间设置有减隔震层；所述减隔震层由型钢和填充料构成,所述型钢的两端均深入上承台和下承台内预埋,填充料由填充在上承台与下承台之间的柔性混凝土构成。本发明旨在提供一种减震效果好,能便于融合入桥梁承台基础的型钢减震结构。(The invention discloses a profile steel shock absorption structure suitable for a bridge bearing platform foundation, which comprises a bridge pier, wherein a bearing platform is fixedly poured at the bottom of the bridge pier, pile foundations are uniformly distributed and fixedly arranged at the bottom of the bearing platform, the bearing platform consists of an upper bearing platform and a lower bearing platform, and a shock absorption and isolation layer is arranged between the upper bearing platform and the lower bearing platform; the seismic isolation and reduction layer is composed of profile steel and filler, two ends of the profile steel are embedded into the upper bearing platform and the lower bearing platform, and the filler is composed of flexible concrete filled between the upper bearing platform and the lower bearing platform. The invention aims to provide a profile steel damping structure which is good in damping effect and can be conveniently integrated into a bridge bearing platform foundation.)

1. The utility model provides a shaped steel shock-absorbing structure suitable for bridge cushion cap basis, includes the pier, the bottom fixed pouring of pier has the cushion cap, the fixed pile foundation that is provided with of cushion cap bottom equipartition, its characterized in that: the bearing platform consists of an upper bearing platform and a lower bearing platform, and a shock absorption and isolation layer is arranged between the upper bearing platform and the lower bearing platform; the seismic isolation and reduction layer is composed of profile steel and filler, two ends of the profile steel are embedded into the upper bearing platform and the lower bearing platform, and the filler is composed of flexible concrete filled between the upper bearing platform and the lower bearing platform.

2. The structural steel damping structure suitable for the bridge bearing platform foundation of claim 1, wherein: the embedded lengths of the section steel in the upper bearing platform and the lower bearing platform are both 550mm, the thickness of the filler is 300mm, the bending strength of the filler is greater than 4.5MPa, and the elastic modulus is less than 1500 MPa.

Technical Field

The invention relates to the technical field of building structures, in particular to a profile steel damping structure suitable for a bridge bearing platform foundation.

Background

At present, commonly used bridge earthquake-resistant systems are mainly divided into a ductile earthquake-resistant system and an earthquake-reduction and isolation system. The ductile earthquake-resistant system mainly prolongs the structural period and consumes earthquake energy through the elastic-plastic deformation of the structure and the member, thereby reducing the effect of earthquake action. The seismic isolation and reduction system mainly consumes seismic energy by arranging seismic isolation and reduction components or other energy consumption devices, so that the effect of seismic action is reduced. In the two modes, the elastic-plastic component or the seismic isolation and reduction component cannot be fused with the bridge structure. Therefore, a structural steel damping structure which has a good damping effect and can be conveniently fused into a bridge bearing platform foundation is needed.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a profile steel damping structure which is good in damping effect and can be conveniently integrated into a bridge bearing platform foundation.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a section steel shock absorption structure suitable for a bridge bearing platform foundation comprises a bridge pier, wherein a bearing platform is fixedly poured at the bottom of the bridge pier, pile foundations are uniformly distributed and fixedly arranged at the bottom of the bearing platform, the bearing platform consists of an upper bearing platform and a lower bearing platform, and a shock absorption and isolation layer is arranged between the upper bearing platform and the lower bearing platform; the seismic isolation and reduction layer is composed of profile steel and filler, two ends of the profile steel are embedded into the upper bearing platform and the lower bearing platform, and the filler is composed of flexible concrete filled between the upper bearing platform and the lower bearing platform.

Furthermore, the embedded lengths of the section steel in the upper bearing platform and the lower bearing platform are both 550mm, the thickness of the filler is 300mm, the bending strength of the filler is greater than 4.5MPa, and the elastic modulus is less than 1500 MPa.

Compared with the prior art, the invention has the following beneficial effects:

the seismic isolation and reduction layer is composed of profile steel and filler, can be conveniently fused into a bridge bearing platform foundation, and the filler composed of flexible concrete can be subjected to elastic-plastic deformation, so that the effects of prolonging the structural period of a ductile seismic system and consuming seismic energy are achieved. The structural steel is inserted between the fillers and embedded into the upper bearing platform and the lower bearing platform, so that the effect of the shock absorption and isolation component in the shock absorption and isolation anti-seismic system can be achieved, the structural steel can enable the upper bearing platform and the lower bearing platform to be mutually solidified, the self-vibration characteristic of the bridge is improved, the shock absorption effect of the bridge is achieved, and the bridge pier and the superstructure are protected. The filling material can also protect the section steel, slow down the corrosion speed of the section steel and improve the durability of the section steel.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of the seismic isolation and reduction layer according to the present invention.

Reference numerals:

1-pile foundation, 2-bridge pier, 3-upper bearing platform, 4-lower bearing platform, 5-section steel and 6-filling material.

Detailed Description

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 and 2, the profile steel damping structure suitable for the bridge bearing platform foundation comprises a bridge pier 2, wherein a bearing platform is fixedly poured at the bottom of the bridge pier 2, pile foundations 1 are uniformly distributed and fixedly arranged at the bottom of the bearing platform, the bearing platform consists of an upper bearing platform 3 and a lower bearing platform 4, and a seismic reduction and isolation layer is arranged between the upper bearing platform 3 and the lower bearing platform 4; the seismic isolation and reduction layer is composed of profile steel 5 and filler 6, two ends of the profile steel 5 are embedded into the upper bearing platform 3 and the lower bearing platform 4, and the filler 6 is composed of flexible concrete filled between the upper bearing platform 3 and the lower bearing platform 4; the embedded lengths of the section steel 5 in the upper bearing platform 3 and the lower bearing platform 4 are both 550mm, the thickness of the filler 6 is 300mm, the bending strength of the filler 6 is more than 4.5MPa, and the elastic modulus is less than 1500 MPa.

The invention can consume most of seismic energy through the seismic isolation and reduction layer between bearing platforms, and improve the self-vibration characteristic of the bridge. The seismic isolation and reduction layer is composed of profile steel 5 and filler 6, and can be conveniently fused into a bridge bearing platform foundation, and the filler 6 composed of flexible concrete can be subjected to elastic-plastic deformation, so that the effects of prolonging the structural period of a ductile seismic system and consuming seismic energy are achieved. The section steel 5 which is inserted between the filling materials 6 and embedded in the upper bearing platform 3 and the lower bearing platform 4 can play a role of a shock absorption and isolation component in a shock absorption and isolation anti-seismic system, and the section steel 5 can enable the upper bearing platform 3 and the lower bearing platform 4 to be mutually solidified. The structural steel 5 uniformly distributed between the upper bearing platform 3 and the lower bearing platform 4 can reduce the arrangement scale and the number relative to the seismic isolation and reduction device, and reduce the requirement of the upper structure on seismic resistance construction. And the manufacturing cost of the section steel 5 is lower, the construction cost is reduced, the filler 6 can also protect the section steel 5, slow down the corrosion speed of the section steel 5 and improve the durability of the section steel 5.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.