阅读说明：本技术 一种斜拉桥用高韧性混凝土塑性铰构造墩柱 (High-toughness concrete plastic hinge structure pier column for cable-stayed bridge ) 是由 张强 刘旭锴 谢斌 孙东利 董礼 于 2021-07-13 设计创作，主要内容包括：本发明公开了一种斜拉桥用高韧性混凝土塑性铰构造墩柱,包括墩柱,所述墩柱顶底两侧为箱型墩柱,箱型墩柱之间固定设置有塑性铰；所述塑性铰包括锚固连接段、渐变段和标准段,锚固连接段、渐变段和标准段均为箱型结构且由高韧性混凝土构成；所述锚固连接段与箱型墩柱相固定,锚固连接段与箱型墩柱的壁厚相同；所述标准段位于塑性铰的中部,标准段的壁厚小于锚固连接段；所述渐变段位于标准段的两端并固定于锚固连接段与标准段之间,渐变段的壁厚由锚固连接段一侧向标准段一侧降低。本发明旨在提供一种弯曲性能高,能降低建造成本,适用于斜拉桥中的塑性铰构造墩柱。(The invention discloses a high-toughness concrete plastic hinge structure pier column for a cable-stayed bridge, which comprises box-shaped pier columns, wherein box-shaped pier columns are arranged on two sides of the top and the bottom of each pier column, and plastic hinges are fixedly arranged between the box-shaped pier columns; the plastic hinge comprises an anchoring connecting section, a gradual change section and a standard section, wherein the anchoring connecting section, the gradual change section and the standard section are all box-shaped structures and are made of high-toughness concrete; the anchoring connecting section is fixed with the box-type pier stud, and the wall thickness of the anchoring connecting section is the same as that of the box-type pier stud; the standard section is positioned in the middle of the plastic hinge, and the wall thickness of the standard section is smaller than that of the anchoring connecting section; the gradual change section is located the both ends of standard section and is fixed in between anchor linkage segment and the standard section, and the wall thickness of gradual change section reduces to standard section one side by anchor linkage segment one side. The invention aims to provide a plastic hinge structure pier stud which has high bending performance, can reduce the construction cost and is suitable for a cable-stayed bridge.)

1. The utility model provides a cable-stay bridge constructs pier stud with high tenacity concrete plasticity hinge, includes pier stud, its characterized in that: box-type pier columns are arranged on two sides of the top and the bottom of each pier column, and plastic hinges are fixedly arranged between the box-type pier columns; the plastic hinge comprises an anchoring connecting section, a gradual change section and a standard section, wherein the anchoring connecting section, the gradual change section and the standard section are all box-shaped structures and are made of high-toughness concrete; the anchoring connecting section is fixed with the box-type pier stud, and the wall thickness of the anchoring connecting section is the same as that of the box-type pier stud; the standard section is positioned in the middle of the plastic hinge, and the wall thickness of the standard section is smaller than that of the anchoring connecting section; the gradual change section is located the both ends of standard section and is fixed in between anchor linkage segment and the standard section, and the wall thickness of gradual change section reduces to standard section one side by anchor linkage segment one side.

2. The pier column with the high-toughness concrete plastic hinge structure for the cable-stayed bridge as claimed in claim 1, wherein: the length of the anchoring connecting section is more than 25 times of the diameter of the stressed main rib of the pier stud.

3. The pier column with the high-toughness concrete plastic hinge structure for the cable-stayed bridge as claimed in claim 1, wherein: the length of the standard section is 2/3 with the side length of the box-type pier stud.

4. The pier column with the high-toughness concrete plastic hinge structure for the cable-stayed bridge as claimed in claim 1, wherein: the length of the gradual change section is 4 times of the difference value between the wall thickness of the anchoring connection section and the wall thickness of the standard section.

5. The pier column with the high-toughness concrete plastic hinge structure for the cable-stayed bridge as claimed in claim 1, wherein: the box-type pier stud is made of reinforced concrete.

Technical Field

The invention relates to the technical field of bridge earthquake resistance, in particular to a high-toughness concrete plastic hinge structure pier column for a cable-stayed bridge.

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 cable-stayed bridge is generally positioned at a position where the terrain fluctuation of crossing rivers, valleys and the like is large and the required height of a bridge deck is high, and the transition pier and the auxiliary pier are often high. The bridge with higher pier height is not suitable for a seismic isolation and reduction system due to lower relative rigidity, and a common ductility seismic system needs to be provided with a plastic hinge at a proper position of a pier column. The common plastic hinge is of a reinforced concrete structure, can generate structural damage after entering plastic deformation, and has lower bending performance and high construction cost. Therefore, a plastic hinge structure pier column with high bending performance and low construction cost, which is suitable for a cable-stayed bridge, is needed.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a plastic hinge structure pier stud which has high bending performance, can reduce the construction cost and is suitable for a cable-stayed bridge.

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

a pier column with a high-toughness concrete plastic hinge structure for a cable-stayed bridge comprises pier columns, wherein box-shaped pier columns are arranged on two sides of the top and the bottom of each pier column, and plastic hinges are fixedly arranged between the box-shaped pier columns; the plastic hinge comprises an anchoring connecting section, a gradual change section and a standard section, wherein the anchoring connecting section, the gradual change section and the standard section are all box-shaped structures and are made of high-toughness concrete; the anchoring connecting section is fixed with the box-type pier stud, and the wall thickness of the anchoring connecting section is the same as that of the box-type pier stud; the standard section is positioned in the middle of the plastic hinge, and the wall thickness of the standard section is smaller than that of the anchoring connecting section; the gradual change section is located the both ends of standard section and is fixed in between anchor linkage segment and the standard section, and the wall thickness of gradual change section reduces to standard section one side by anchor linkage segment one side.

Furthermore, the length of the anchoring connecting section is more than 25 times of the diameter of the stressed main rib of the pier column.

Further, the length of the standard section is 2/3 which is the side length of the box-type pier stud.

Further, the length of the gradual change section is 4 times of the difference value between the wall thickness of the anchoring connection section and the wall thickness of the standard section.

Further, the box-type pier is made of reinforced concrete.

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

the invention can reduce the use of reinforced concrete structures in the plastic hinges, reduce the construction cost and the weight of the plastic hinges, replace reinforced concrete with high-toughness concrete, fully utilize the compression performance of the concrete, improve the deformation capacity and the yield performance of the plastic hinges through the high-toughness plastic hinges, and improve the anti-seismic effect of the cable-stayed bridge.

Drawings

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

FIG. 2 is a schematic cross-sectional view of a box pier in accordance with the present invention;

FIG. 3 is a schematic cross-sectional view of the anchor connecting segment according to the present invention;

FIG. 4 is a schematic cross-sectional view of a standard segment according to the present invention.

Reference numerals:

1-box type pier stud, 2-anchoring connecting section, 3-gradual change section and 4-standard section.

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 to 4, the pier column constructed by the high-toughness concrete plastic hinge for the cable-stayed bridge comprises pier columns, box-shaped pier columns 1 are arranged on two sides of the top and the bottom of each pier column, and the plastic hinge is fixedly arranged between the box-shaped pier columns 1; the plastic hinge comprises an anchoring connecting section 2, a gradual change section 3 and a standard section 4, wherein the anchoring connecting section 2, the gradual change section 3 and the standard section 4 are all box-shaped structures and are made of high-toughness concrete; the anchoring connecting section 2 is fixed with the box-type pier stud 1, and the wall thickness of the anchoring connecting section 2 is the same as that of the box-type pier stud 1; the standard section 4 is positioned in the middle of the plastic hinge, and the wall thickness of the standard section 4 is smaller than that of the anchoring connecting section 2; the gradual change section 3 is positioned at two ends of the standard section 4 and is fixed between the anchoring connection section 2 and the standard section 4, and the wall thickness of the gradual change section 3 is reduced from one side of the anchoring connection section 2 to one side of the standard section 4; the box-type pier 1 is made of reinforced concrete.

The length of the anchoring connecting section 2 is more than 25 times of the diameter of a main stress rib of the pier column, so that the anchoring length of concrete combination of the steel bar and the anchoring connecting section 2 in the box-type pier column 1 is met, and the structural strength is ensured. The length of the standard section 4 is 2/3 of the side length of the box-type pier stud 1, so that the requirement of the standard in the highway bridge anti-seismic design standard is met, and the length of the plastic hinge can ensure that the plastic hinge can normally play a role. The length of the gradual change section 3 is 4 times of the difference value between the wall thickness of the anchoring connection section 2 and the wall thickness of the standard section 4, so that the wall thickness of the gradual change section 3 can be slowly changed between the anchoring connection section 2 and the standard section 4, and the wall thickness is prevented from suddenly changing so as to avoid force transmission suddenly changing.

The invention can reduce the use of reinforced concrete structures in the plastic hinges, reduce the construction cost and the weight of the plastic hinges, replace reinforced concrete with high-toughness concrete, fully utilize the compression performance of the concrete, improve the deformation capacity and the yield performance of the plastic hinges through the high-toughness plastic hinges, and improve the anti-seismic effect of the cable-stayed bridge.

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.