CN110005131A - Recoverable function support body framework system after a kind of shake of additional anti-side energy-consuming device - Google Patents

Abstract

The invention relates to a post-earthquake recoverable functional frame support system with an additional anti-side energy dissipation device, belonging to the field of structural engineering. The invention applies the design concepts of damage control, replaceable energy dissipation elements, bending moment amplitude modulation, vertical bearing and horizontal anti-side separation, and combines the advantages of the traditional rigid column system and the traditional hinged column system. The shape memory alloy is used as the material of the column base support to improve the stress performance of the node and prolong the service life. Through reasonable design, the bending moment amplitude modulation can be realized, and the bending moment on the column can be reduced to protect it from damage. At the same time, the replaceable anti-side energy dissipation device can undertake the main anti-side work, and the "strong joint" method can prevent damage from occurring at the joint. place. After the earthquake, it is only necessary to replace the anti-side energy dissipation device to restore the function of the anti-bending hinged column foot frame support system.

Description

A post-earthquake recoverable functional frame support system with additional anti-side energy dissipation device

technical field

This patent relates to a post-earthquake recoverable functional frame support system with an additional anti-side energy dissipation device, belonging to the technical field of structural engineering.

Background technique

Industrialized prefabricated steel structure is an inevitable trend in the development of high-rise steel structure housing in the future, and it is the only way for my country to realize the industrialization of construction. Building assembly can standardize all components, the factory is produced in a unified specification, and the bolts are accurately assembled on site to avoid the consumption of building materials due to construction errors, and compared with other structural forms, it can reduce the self-weight and simplify the design to reduce the cost; the project is highly organized , so that mechanized operations can largely replace manual labor and reduce related costs.

At present, there are two forms of connection between the bottom column and the foundation of the steel structure, one is rigid connection and the other is hinged connection, but there are serious problems in both forms. If the bottom column is rigidly connected to the foundation, a huge bending moment will be generated at the column foot under the action of the earthquake, which will cause the column foot to be damaged, and it is extremely difficult to repair or replace after the earthquake; if the bottom column is hinged with the foundation, the column foot will not bear the Although the bending moment can ensure that the column is not damaged by bending, because the column cannot resist the lateral load, the overall rigidity of the structure is seriously insufficient and cannot meet the building requirements.

In order to overcome the above problems, the present invention proposes a post-earthquake recoverable functional frame support system with an additional anti-side energy dissipation device. The form of the column foot of the system separates the original axial force and shear force of the column, so that the column mainly bears the axial force, and the anti-side energy dissipation device mainly resists the lateral load. It can protect the column from being damaged, and the overall lateral resistance is not weaker than that of the traditional rigid column. At the same time, after the earthquake, only the concrete-filled steel tubular members need to be replaced to restore the function of the overall structure, which greatly reduces the difficulty and cost of post-earthquake repair.

The system of the invention adopts common plate parts to realize the repairability of the post-seismic function of the column foot joints through reasonable arrangement, and at the same time introduces the concepts of damage control, replaceable energy dissipation elements, bending moment amplitude modulation, vertical load bearing and horizontal resistance to lateral separation. In the field of column foot joints, the overall structure is ingenious and the force transmission is clear and reasonable. It is especially suitable for steel frame structure houses. While ensuring building safety, it can greatly improve its economy. It can provide technical reference for residential industrialization and building assembly. .

SUMMARY OF THE INVENTION

The invention proposes a post-earthquake recoverable functional frame support system with an additional anti-side energy dissipation device, which aims to solve the disadvantages of large post-earthquake damage to the bottom column and difficulty in post-earthquake repair in the existing assembled steel structure system, and to avoid The steel is wasted, the service life of the joint is prolonged, and the economic benefit is improved. At the same time, it also provides more choices for the prefabricated bottom column and column foot joints.

The innovation of the system lies in the use of a cross-shaped hinge base and a replaceable anti-side energy dissipation device for the column foot. The anti-bending hinged column foot is based on the design concepts of damage control, replaceable energy dissipation elements, bending moment amplitude modulation and horizontal anti-side separation. The proposed method aims to realize the separation of the bearing capacity of each component in the column foot area under large rotation angles, which can not only provide sufficient lateral rigidity, but also concentrate the plastic damage on the replaceable anti-lateral energy dissipation device, so as to achieve post-earthquake resistance. It is only necessary to replace the anti-side energy dissipation device to restore the function of the column foot joint; the bending-resistant hinged column foot avoids the serious plastic damage of the column foot under the large interstory displacement angle of the traditional bending-resistant rigid column foot joint and is not easy to be Replacement, the traditional hinged column foot node can achieve large turning angles but cannot withstand bending moments and other outstanding problems; the cross-shaped hinge base is welded by a cross-shaped short column and an end bottom plate; the bottom of the square steel column is slotted, The width of the notch matches that of the cross-shaped stub, and the depth of the notch is less than the length of the cross-shaped stub; the slot of the square steel column is spliced with the cross-shaped hinge base and then welded at the butt joint. At this time, the square steel column is welded. There is a certain distance between the bottom and the bottom plate of the cross hinge base; the column foot formed by welding the square steel column and the cross hinge base has a high rotation ability, which can be regarded as a hinge column foot; the replaceable anti-side energy dissipation The device is welded by side shear wall, horizontal connecting section, vertical end plate and foundation bottom plate; the anti-side energy dissipation device and the square steel column are connected by high-strength bolts to achieve the purpose of bending moment amplitude modulation and horizontal anti-side separation; foundation The bottom plate is fixed to the foundation, so that the device has the ability to resist the side; following the design concept of "strong connection, weak member", vertical stiffeners are provided on the connectors, and the steel plate of the side shear wall is provided with local weakening. Avoid plastic failure at node connections.

The material of the cross-shaped short column is a shape memory alloy, and the superelasticity of the shape memory alloy can effectively reduce or even eliminate the damage of the seismic force to the cross-shaped hinge base, thereby improving the service life of the structure, in terms of safety and applicability. , The economy has been greatly improved.

The square steel central column with flanges is fixedly connected to the foundation through the cross-shaped hinge base and high-strength bolt group, and the replaceable anti-side energy dissipation device is fixedly connected to the foundation through the foundation bottom plate and high-strength bolts, which can resist the in-plane bending moment , and realizes the bending moment amplitude modulation, which solves the problem of insufficient lateral resistance of the hinged column foot.

The main part of the side shear wall is partially weakened, and the weakening form can be dog bone weakening or opening weakening, so as to prevent plastic damage from occurring at the joints of nodes and realize plastic damage control.

The advantages of this patent are mainly reflected in the following aspects:

(1) Bending moment amplitude modulation and vertical bearing and horizontal anti-side separation. The base of the bottom column and the foundation are connected by a cross-type hinge base, which can be regarded as a hinged column foot. Under the action of the earthquake, the column mainly bears the axial force and releases the bending moment; the main horizontal anti-side work is undertaken by the anti-side energy dissipation device.

(2) Damage control. After the bending moment amplitude modulation and vertical bearing and horizontal anti-side separation are realized, the column foot can be prevented from being damaged by bending; the connection between the anti-side energy dissipation device and the column is reinforced with ribs to protect the joint from premature damage, so as to give full play to the anti-side effect. Shear walls have excellent flexural and shear resistance. Using shape memory alloy as the material of the cross hinge base, its superelasticity can effectively reduce or even eliminate the damage to the cross hinge base caused by seismic force.

(3) Energy-consuming components can be replaced. Due to the realization of internal force separation resistance and damage control, the function of the column after the earthquake is intact and does not need to be replaced. The damaged side shear wall and the column are connected by bolts, which is easy to disassemble. function recovery, complete the post-earthquake recovery work.

(4) The design of the column foot joints combines the advantages of traditional hinged columns and traditional rigidly connected columns. The hinged bottom of the column and the foundation release the bending moment, forming an effective protection for the column. Therefore, the joint design can achieve the effect of traditional rigidly connected columns in practical applications, and no plastic damage occurs in the column base area after the earthquake, and it still has a good bearing capacity. It only needs to replace the lateral shear wall components to restore. Function.

(5) Energy-dissipating elements are arranged at the position of the diagonal braces. When the diagonal braces are stressed, the energy-consuming elements absorb energy through their own internal buckling deformation, so as to increase the bearing capacity of the diagonal braces, prevent instability and damage of the diagonal braces, and improve the bending resistance of the hinged column feet. Frame support system stability.

Description of drawings

Figure 1 is a three-dimensional diagram of a post-earthquake recoverable functional frame support system with an additional anti-side energy dissipation device;

Figure 2 is a disassembled diagram of a post-earthquake recoverable functional frame support system with an additional anti-side energy dissipation device;

3 is a front view of a post-earthquake recoverable functional frame support system with an additional anti-side energy dissipation device;

Figure 4 is a side view of a post-earthquake recoverable functional frame support system with an additional anti-side energy dissipation device;

FIG. 5 is a top view of a post-earthquake recoverable functional frame support system with an additional anti-side energy dissipation device.

Detailed ways

The embodiments of the present patent will be described in detail below with reference to the accompanying drawings 1 to 5 .

As shown in Figures 1 to 5, a post-earthquake recoverable functional frame support system with an additional anti-side energy dissipation device includes the following components:

1——Cross hinge base;

2——Replaceable anti-side energy dissipation device;

3——The center column of square steel pipe with flange plate;

4——The upper column of the square steel pipe with the cantilever beam section;

5 - energy consumption section of diagonal brace;

6 - Intermediate base support;

7 - I-beam section;

8 - the first connecting device;

9—Second connecting device.

As shown in Figure 1-5, a post-earthquake recoverable functional frame support system with additional anti-side energy dissipation devices includes two square steel pipe center columns (3) with flanges, two cross-shaped hinge bases (1) , two replaceable anti-side energy dissipation devices (2), two square steel tube upper columns with cantilever beam sections (4), two diagonal brace energy dissipation sections (5), an intermediate foundation support (6), a The I-beam section (7), two sets of first connecting devices (8) and two sets of second connecting devices (9); the square steel pipe center column (3) with a flange includes a flange and A square steel pipe column, the flange is welded on the upper end of the square steel pipe column; the cross-shaped hinge base (1) is welded by a cross-shaped short column and an end bottom plate; the replaceable anti-side energy dissipation The device (2) consists of a lateral shear wall, a horizontal connecting section, two vertical end plates of the horizontal connecting section, a lateral shear wall foundation bottom plate and an upper end plate. A vertical end plate is welded at both ends of the connection section, the upper end of the side shear wall is welded with the lower side of the upper end plate, and the upper end plate is connected with the lower side of the horizontal connection section with high-strength bolts, and the lower end of the side shear wall is welded with the foundation bottom plate. The base plate of the foundation is fixed to the foundation through high-strength bolts, and the vertical end plate at one end of the horizontal connection section is connected by a group of high-strength bolts and the central column of the square steel pipe with the cantilever beam section (3); The column (4) includes a cantilever beam section and a square steel tube column with the same height as the cantilever beam section, and the two are welded together; the first connection device (8) is a group of high-strength bolts; the group of second connections The device (9) includes two upper flange cover plates, two upper flange backing plates, a lower flange cover plate, two web shearing plates and a group of high-strength bolts.

As shown in Figures 1 and 2, the two diagonal bracing energy dissipation sections (5) are welded on both sides of a middle support, and the unconnected end is welded on the square steel pipe center column (3) and the flanged plate. The connection point of the upper column (4) of the square steel pipe with the cantilever beam section; the upper end of the square steel pipe middle column (3) with the flange is connected to a square steel pipe with the cantilever beam section through a set of first connecting devices (8). The upper column of the steel pipe (4) is connected, and the lower end of the middle column of the square steel pipe is slotted. The width of the slot is the same as the thickness of the veneer of the column body of the cross-shaped short column. 1/300～1/60; the cross-shaped short column in the cross-shaped hinge base (1) is welded with the notch at the lower end of the central column of the square steel pipe; the upper column (4) of the square steel pipe with the cantilever beam section passes through A set of second connecting means (9) and the I-beam segment.

Claims (4)

1. recoverable function support body framework system after a kind of shake of additional anti-side energy-consuming device, it is characterised in that: the system includes The square steel tube center pillar of two flange plates, two cross hinge seats, two replaceable anti-side energy-consuming devices, two band cantilever beams The square steel tube upper prop of section, two diagonal braces energy consumption sections, an intermediate base support, an I-shaped beam section, two group of first attachment device With two group of second attachment device；The square steel tube center pillar of one flange plate includes a ring flange and a square steel tube Column, ring flange are welded on quadrate steel pipe column upper end；One cross hinge seat is by a cross short column and end bottom Plate is welded；The replaceable anti-side energy-consuming device of described one is by an anti-side shear wall, a horizontal connection section, two water Ribbed stiffener is arranged in the vertical end plate of flushconnection section, an anti-side shear wall sole plate and a upper head plate composition, horizontal connection section One piece of vertical end plate is respectively welded at plate, horizontal connection section both ends, welds on the downside of anti-side shear wall upper end and upper head plate, and with high-strength spiral shell Bolt on the downside of upper head plate and horizontal connection section connecting, and anti-side shear wall lower end and sole plate weld, and sole plate passes through high-strength Bolt is affixed with basis, and the vertical end plate of horizontal connection section one end passes through high-strength bolt and the square steel tube center pillar with cantilever beam section Connection；Square steel tube upper prop of described one with cantilever beam section includes a cantilever beam section and one and the contour side of cantilever beam section Steel pipe column, the two are welded to form；Two diagonal braces energy consumption section is welded on the two sides of an intermediate support, diagonal brace energy consumption Duan Wei One end of connection is welded on the square steel tube center pillar of flange plate and the square steel tube upper prop junction with cantilever beam section；Described one The square steel tube center pillar upper end of flange plate is connect by one group of first attachment device with a square steel tube upper prop with cantilever beam section, Square steel tube center pillar lower end fluting, width of rebate is identical as the shaft veneer thickness of cross short column, and depth of rebate is less than cross The length of short column, difference take the 1/300~1/60 of pillar height；Cross short column and square steel tube in the cross hinge seat The welding of center pillar lower end notch；The square steel tube upper prop with cantilever beam section is connected by one group of second attachment device and I-shaped beam section It connects.

2. recoverable function support body framework system after a kind of shake of additional anti-side energy-consuming device according to claim 1, Be characterized in that: first attachment device is high-strength bolt；One group of second attachment device includes two top flanges Cover board, two top flange backing plates, a lower flange cover board, two web shear plates and high-strength bolt.

3. recoverable function support body framework system after a kind of shake of additional anti-side energy-consuming device according to claim 1, It is characterized in that: selecting making material of the marmem as the cross short column part of the cross hinge seat.

4. recoverable function support body framework system after a kind of shake of additional anti-side energy-consuming device according to claim 1, Be characterized in that: the anti-side shear wall in the replaceable anti-side energy-consuming device of described one is using steel plate shear force wall, steel plate concrete One of four kinds of shear wall, reinforced concrete shear wall, concrete filled steel tube forms.