CN106049671B - Replaceable assembled steel frame and steel plate shear wall structure after one kind shake - Google Patents

Abstract

The invention discloses a post-earthquake replaceable assembled steel frame and steel plate shear wall structure, including frame steel columns, main steel beams, post-earthquake replaceable energy-consuming nodes, and post-earthquake replaceable embedded steel plates and columns of frame steel columns The webs of the body are connected by a first end plate. The second end plate of the main steel beam is fixedly arranged at both ends of the beam body. The third end plate of the replaceable energy dissipation node after the earthquake is fixedly arranged at both ends of the beam section, and the third end plate is respectively connected with the second end plate of the beam body and the inner flange of the column by bolts. The post-earthquake replaceable embedded steel plate is connected with the inner flange of the column and the beam body with bolts. There are long slots at the contact points between the four corners of the post-earthquake replaceable embedded steel plate and the post-earthquake replaceable energy-dissipating nodes. The invention can effectively transmit internal force, ensure the full play of the structural integrity and mechanical performance; and actively control the structural damage and failure mechanism to ensure that the main structure maintains an elastic state, and the plastic energy consumption and damage occur at a designated local position, which is convenient for replacement after the earthquake and repair to reduce economic losses.

Description

A post-earthquake replaceable fabricated steel frame and steel plate shear wall structure

technical field

The invention relates to the technical field of lateral force resistant structures, in particular to a replaceable assembled steel frame and steel plate shear wall structure after an earthquake.

Background technique

Based on the urgent need for the construction of high-rise and super high-rise buildings and the current situation of frequent strong earthquakes, steel frame and steel plate shear wall structures have developed rapidly in recent years as a structural system with excellent lateral resistance. Compared with the traditional steel frame system, it has larger initial lateral stiffness and higher post-buckling shear capacity; compared with the traditional steel frame and concrete shear wall system, its material is consistent, the deformation is easy to coordinate, and the ductility It is easy to match, easy to connect and construct, and it can avoid the rapid decrease of the bearing capacity of the steel frame as the second line of defense after the failure of the reinforced concrete shear wall, resulting in brittle failure of the structure. Therefore, steel frame and steel plate shear wall is a structural form with broad application prospects.

Under the action of strong earthquakes, the failure mode of the steel frame and steel plate shear wall structure is that the embedded steel plates have obvious out-of-plane buckling deformation, forming two-way tension bands, plastic hinges appear at the frame beam ends and frame column feet, and steel columns and steel beams Other parts maintain elastic overall deformation and failure. The traditional wall panel connection form is the welded connection between the wall panel and the fishplate, and the fishplate is welded to the frame beam and frame column. This welding connection means that after a strong earthquake, although the steel column and the main steel beam can still maintain elasticity, However, the damaged beam end nodes, embedded steel plates, and connectors cannot be replaced, resulting in huge economic losses, and cannot meet the urgent need for rapid repair of lifeline projects. Therefore, a steel frame and steel plates that can replace the damaged position after the earthquake are proposed. The shear wall structure system is very necessary.

In order to achieve the above goals, the replaceable parts of the steel frame and steel plate shear wall structures need to be prefabricated components, which are convenient for replacement and construction. With the needs of the development of industrial automation in our country, it is imminent to improve construction quality, shorten construction period, and reduce on-site labor intensity. Prefabricated assembly structures have received widespread attention. Therefore, the combination of prefabricated and post-earthquake replaceable concepts provides a solution for the realization of replaceable steel frame and steel plate shear wall structural systems after earthquakes, and realizes the full use of the seismic advantages of steel frame and steel plate shear wall structures Target.

Contents of the invention

The technical problem to be solved by the present invention is to provide a replaceable assembled steel frame and steel plate shear wall structure after an earthquake, to ensure the structural integrity and the full play of the mechanical performance; and to actively control the structural damage and failure mechanism to ensure the main structure Maintain the elastic state, the damage occurs in the designated local position, and as a replaceable component, it is convenient for replacement and repair after the earthquake.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

A post-earthquake replaceable assembled steel frame and steel plate shear wall structure, including frame steel columns, main steel beams, post-earthquake replaceable energy-consuming nodes and post-earthquake replaceable embedded steel plates. Spliced and assembled with high-strength bolts.

The frame steel column includes a column body, a first end plate, a cover plate and a column angle steel, the web of the column body is connected by the first end plate, the outer flange of the column body is connected by a cover plate, the The inner flanges of the columns are connected by column angle steel. The frame steel columns are spliced at the position where the bending moment is small, and the column angle steel plays the dual role of the cover plate and the replaceable embedded steel plate connector after the earthquake. The above connection method can effectively transmit the axial force and bending moment, ensuring the structural integrity And the full play of the mechanical performance.

The main steel beam includes a beam body, a second end plate and a beam angle steel, and the second end plate is fixedly arranged at both ends of the beam body.

The post-earthquake replaceable energy dissipation node includes a beam section and a third end plate, the third end plate is fixedly arranged at both ends of the beam section, the third end plate at one end of the beam section is connected to the second end of the beam body The plate is connected by bolts, and the third end plate at the other end of the beam section is connected with the inner flange of the column by bolts. The above prefabricated connection forms can effectively transmit the corresponding internal force and ensure the full play of structural integrity and mechanical performance.

The left side and right side of the post-earthquake replaceable embedded steel plate are respectively connected to the inner flange bolts of the column body through the column angle steel, and the upper side and the lower side of the post-earthquake replaceable embedded steel plate are respectively connected through the beam body angle steel Connected with beam body bolts, long grooves are opened at the four corners of the post-earthquake replaceable embedded steel plate and the post-earthquake replaceable energy-dissipating nodes. After the earthquake, the replaceable embedded steel plate is connected with the frame steel column and the main steel beam with replaceable column angle steel and beam body angle steel and high-strength bolts. The post-earthquake replaceable embedded steel plate has long grooves at the four corners, which are not connected to the post-earthquake replaceable energy-dissipating nodes, so as to reduce the adverse effect of the steel plate tension band on the formation position of the plastic hinge at the beam end, and effectively improve the structural ductility. The replaceable embedded steel plate after the earthquake is connected with the frame steel column and the main steel beam by replaceable angle steel connectors and high-strength bolts. Angle connections ensure a more even transfer of steel tension bands to the frame members.

Preferably, the first end plate is arranged at a height of 1/3-2/5 of the column body from the column bottom. The column height is the position where the bending moment of the frame steel column is small.

Preferably, the column is fixedly provided with node domain stiffeners.

Preferably, end plate stiffeners are fixedly provided on the third end plate.

Preferably, the length of the post-earthquake replaceable energy dissipation node is 1.5 to 2.0 times the height of the beam body.

Preferably, the beam section of the post-earthquake replaceable energy-dissipating node is weakened in the form of a dog-bone flange or a hole in the web, or the web is made of steel with a low yield point. A variety of local weakening forms of the beam section, actively control the plastic energy consumption and damage to the specified local position, ensure that the main steel beam remains elastic after the earthquake, without replacement, and realize the design concept of combining load-bearing components and energy-dissipating components, which can be replaced after the earthquake Energy-dissipating nodes are connected with frame steel columns and main steel beams with end plates and high-strength bolts.

Preferably, the post-earthquake replaceable embedded steel plate is a non-stiffened steel plate.

Preferably, the post-earthquake replaceable embedded steel plate is a stiffened steel plate, and the post-earthquake replaceable embedded steel plate is provided with steel plate stiffeners.

Preferably, the post-earthquake replaceable embedded steel plate is a perforated steel plate, and the post-earthquake replaceable embedded steel plate is provided with a round hole in the steel plate.

Preferably, the post-earthquake replaceable embedded steel plate is a steel plate with vertical seams, and the post-earthquake replaceable embedded steel plate is provided with steel plate vertical seams. After the earthquake, the replaceable embedded steel plate adopts the above forms, which can fully dissipate the seismic energy, so that the structure meets the design principles of "strong frame, weak plate wall", "strong column and weak beam", and "strong connection and weak member".

The beneficial effects of the present invention are as follows:

The post-earthquake replaceable assembled steel frame and steel plate shear wall structure of the present invention adopts the above technical scheme, and organically combines the prefabricated structure with the post-earthquake replaceable concept. Assembled by bolts, fully guarantee the construction quality, reduce labor intensity, improve the speed of structure construction; it is beneficial to realize building energy saving. Through reasonable design of replaceable energy-dissipating nodes after earthquakes and replaceable embedded steel plate connection forms after earthquakes, internal forces can be effectively transmitted under earthquake action, ensuring the full play of structural integrity and mechanical performance; and active control of structural damage and failure The mechanism ensures that the main structure maintains an elastic state, and the plastic energy dissipation and damage occur at a designated local location, and it is used as a replaceable component, which is convenient for replacement and repair after an earthquake, reduces repair time, and reduces economic losses.

Description of drawings

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Fig. 1 shows a structural schematic diagram of a post-earthquake replaceable assembled steel frame and steel plate shear wall structure of the present invention.

Fig. 2 shows the A-A sectional view of the frame steel column, the post-earthquake replaceable energy dissipation node and the main steel beam connection in Fig. 1 .

Fig. 3 shows the C-C cross-sectional view of the connection between the replaceable embedded steel plate and the main steel beam after the moderate earthquake in Fig. 2 .

Fig. 4 shows a B-B sectional view of the frame steel column connection in Fig. 1 .

Fig. 5 shows a D-D sectional view of the steel column connection of the frame in Fig. 4 .

Figure 6 shows the E-E sectional view of the steel column connection of the frame in Figure 4 .

Fig. 7 shows a schematic structural diagram of a post-earthquake replaceable energy-dissipating node with holes in the web of the present invention.

Fig. 8 shows a schematic diagram of the post-earthquake replaceable energy-dissipating node of the dog-bone flange of the present invention.

Fig. 9 shows a schematic diagram of the post-earthquake replaceable energy-dissipating node structure in which the web is made of steel with a low yield point according to the present invention.

Fig. 10 shows the F-F sectional view of the replaceable energy dissipation node after the earthquake in Fig. 7, Fig. 8 and Fig. 9 .

Fig. 11 shows the G-G sectional view of the replaceable energy dissipation node after the earthquake in Fig. 7, Fig. 8 and Fig. 9 .

Fig. 12 shows a structural schematic view of the cross-shaped stiffener with replaceable embedded steel plate after an earthquake according to the present invention.

Fig. 13 shows a schematic structural view of the oblique stiffeners embedded with replaceable steel plates after an earthquake according to the present invention.

Fig. 14 shows a structural schematic diagram of the vertical stiffener with replaceable embedded steel plate after an earthquake according to the present invention.

Fig. 15 shows a schematic structural view of the transversal stiffeners embedded with replaceable steel plates after an earthquake according to the present invention.

Fig. 16 shows a schematic structural view of the perforated steel plate with replaceable embedded steel plate after an earthquake according to the present invention.

Fig. 17 shows a schematic structural view of a vertically seamed steel plate with a replaceable embedded steel plate after an earthquake according to the present invention.

Detailed ways

In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

As shown in Figures 1-17, a post-earthquake replaceable assembled steel frame and steel plate shear wall structure, including frame steel columns 1, main steel beams 2, post-seismic replaceable energy-consuming nodes 3 and post-earthquake replaceable Embedded steel plate 4.

The frame steel column 1 includes a column body 11 , a first end plate 12 , a cover plate 7 and a column angle steel 6 , and the node domain stiffeners 13 are fixed on the column body 11 . The web of the column 11 is connected by the first end plate 12 , the outer flange of the column 11 is connected by the cover plate 7 , and the inner flange of the column 11 is connected by the column angle steel 6 . The first end plate 12 is arranged at a height of 1/3-2/5 of the column body 11 from the column bottom.

The main steel beam 2 includes a beam body 21 , a second end plate 22 and a beam angle steel 5 , and the second end plate 22 is fixedly arranged at both ends of the beam body 21 .

The post-earthquake replaceable energy dissipation node 3 includes a beam section 31 and a third end plate 32, the third end plate 32 is fixedly arranged on both ends of the beam section 31, and the third end plate 32 is fixedly provided with end plate stiffener 33 . The third end plate 32 at one end of the beam section 31 is bolted to the second end plate 22 of the beam body 21 , and the third end plate 32 at the other end of the beam section 31 is bolted to the inner flange of the column body 11 . The length of the post-earthquake replaceable energy dissipation node 3 is 1.5 to 2.0 times the height of the beam body 21 . The weakening method of the beam section 31 of the post-earthquake replaceable energy dissipation node 3 is a dog-bone flange as shown in Figure 8, or a web opening as shown in Figure 7, or a web opening as shown in Figure 9. The plates are low yield point steel.

The left and right sides of the post-earthquake replaceable embedded steel plate 4 are respectively connected to the inner flange bolts of the column body 11 through the column angle steel 6, and the upper side and the lower side of the post-earthquake replaceable embedded steel plate 4 are respectively The beam body angle steel 5 is bolted to the beam body 21, and the four corners of the post-earthquake replaceable embedded steel plate 4 and the post-earthquake replaceable energy-dissipating nodes 3 are in contact with long slots.

The post-earthquake replaceable embedded steel plate 4 can adopt various forms, for example, the post-earthquake replaceable embedded steel plate 4 is a non-stiffened steel plate. The post-earthquake replaceable embedded steel plate 4 can also be a stiffened steel plate. The post-earthquake replaceable embedded steel plate 4 is provided with a steel plate stiffener 41, as shown in FIG. There are cross-shaped steel plate stiffeners 41, as shown in Figure 13, the replaceable embedded steel plate 4 after the earthquake is provided with oblique steel plate stiffeners 41, as shown in Figure 14, the replaceable embedded steel plate 4 after the earthquake is provided with vertical To the steel plate stiffener 41, as shown in Figure 15, the replaceable embedded steel plate 4 after the earthquake is provided with a transverse steel plate stiffener 41. The steel plate stiffeners 41 include plate-like stiffeners and shaped steel stiffeners. The post-earthquake replaceable embedded steel plate 4 can also be a perforated steel plate. As shown in FIG. The post-earthquake replaceable embedded steel plate 4 can also be a steel plate with vertical seams. As shown in FIG. 17 , the post-earthquake replaceable embedded steel plate 4 is provided with steel plate vertical seams 43 .

The material that the patent of the present invention adopts is as follows:

The frame steel column 1 and the main steel beam 2 can use Q345 steel or high-strength steel; Use Q235, Q345 or low yield point steel; the post-earthquake replaceable embedded steel plate 4 can use Q235, Q345 or low yield point steel; the beam angle 5 and column angle 6 can use Q345 or high strength steel.

The specific construction process is as follows:

In the factory, first, the column body 11, the first end plate 12 and the node domain stiffener 13 are welded into a prefabricated frame steel column 1; the beam body 21 and the second end plate 22 are welded into a prefabricated main steel beam 2; the beam section 31. The third end plate 32 and the end plate stiffener 33 are welded into a prefabricated replaceable energy-dissipating node 3 after an earthquake, and at the same time select an appropriate weakening form as required (dog-bone flange or web opening or web with low yield point steel); after the earthquake, the replaceable embedded steel plate 4 has long slots in the four corners, and at the same time selects an appropriate structure (non-stiffened steel plate, stiffened steel plate, holed steel plate or vertical seam steel plate) according to the needs; all required on-site bolts The parts to be connected are pre-punched.

On site, firstly, after the frame steel column 1 is installed in place, high-strength bolts are used to connect the web at the splicing position of the column 11, and the cover plate 7 is used to connect the outer flange of the column 11; The beam 2 is connected to the post-earthquake replaceable energy-dissipating node 3 through the second end plate 22 and the third end plate 32 with high-strength bolts, and through the third end plate 32 to the inner flange of the column 11 with high-strength bolts to form an integral steel Frame; finally, through the beam body angle steel 5 and the column body angle steel 6, the post-earthquake replaceable embedded steel plate 4 is connected with the frame steel column 1 and the main steel beam 2 with high-strength bolts to form a post-earthquake replaceable assembled steel frame and steel plate Shear wall structure.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those of ordinary skill in the art can also make It is not possible to exhaustively list all the embodiments here, and any obvious changes or changes derived from the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims (10)

1. A post-earthquake replaceable assembled steel frame and steel plate shear wall structure, characterized in that it includes frame steel columns (1), main steel beams (2), post-earthquake replaceable energy-consuming nodes (3) and seismic The embedded steel plate (4) can be replaced afterwards; The frame steel column (1) includes a column (11), a first end plate (12), a cover plate (7) and a column angle steel (6), and the web of the column (11) passes through the first end The plates (12) are connected, the outer flanges of the cylinders (11) are connected by cover plates (7), and the inner flanges of the cylinders (11) are connected by cylinder angle steels (6); The main body steel beam (2) includes a beam body (21), a second end plate (22) and a beam body angle steel (5), and the second end plate (22) is fixedly arranged at both ends of the beam body (21) ; The post-earthquake replaceable energy dissipation node (3) includes a beam section (31) and a third end plate (32), the third end plate (32) is fixedly arranged at both ends of the beam section (31), and the The third end plate (32) at one end of the beam section (31) is bolted to the second end plate (22) of the beam body (21), and the third end plate (32) at the other end of the beam section (31) is connected to the column The inner flange bolt connection of body (11); The left side and the right side of the post-earthquake replaceable embedded steel plate (4) are respectively connected with the inner flange bolts of the column body (11) through the column angle steel (6), and the post-earthquake replaceable embedded steel plate (4) ) are respectively connected to the beam body (21) by bolts on the beam body angle steel (5) and the four corners of the post-earthquake replaceable embedded steel plate (4) are connected to the post-seismic replaceable energy-dissipating nodes ( 3) There is a long groove at the contact point. 2. A post-earthquake replaceable assembled steel frame and steel plate shear wall structure according to claim 1, characterized in that: the first end plate (12) is set at the distance between the column body (11) and the column bottom 1/3～2/5 height. 3. A post-earthquake replaceable assembled steel frame and steel plate shear wall structure according to claim 2, characterized in that: the column (11) is fixed with node domain stiffeners (13). 4. A post-earthquake replaceable assembled steel frame and steel plate shear wall structure according to claim 1, characterized in that: the third end plate (32) is fixed with an end plate stiffener (33) . 5. A post-earthquake replaceable assembled steel frame and steel plate shear wall structure according to claim 1, characterized in that: the post-earthquake replaceable energy-consuming node (3) has a length of beam body (21) 1.5 to 2.0 times the height. 6. A post-earthquake replaceable assembled steel frame and steel plate shear wall structure according to claim 1, characterized in that: the weakening of the beam section (31) of the post-earthquake replaceable energy-dissipating node (3) The method is dog-bone flange or web opening or web is low yield point steel. 7. A post-earthquake replaceable assembled steel frame and steel plate shear wall structure according to claim 1, characterized in that: the post-earthquake replaceable embedded steel plate (4) is a non-stiffened steel plate. 8. A post-earthquake replaceable assembled steel frame and steel plate shear wall structure according to claim 1, characterized in that: the post-earthquake replaceable embedded steel plate (4) is a stiffened steel plate, and the post-seismic Steel plate stiffeners (41) are arranged on the replaceable embedded steel plate (4). 9. A post-earthquake replaceable assembled steel frame and steel plate shear wall structure according to claim 1, characterized in that: the post-earthquake replaceable embedded steel plate (4) is a steel plate with holes, and the post-seismic The rear replaceable embedded steel plate (4) is provided with a steel plate round hole (42). 10. A post-earthquake replaceable assembled steel frame and steel plate shear wall structure according to claim 1, characterized in that: the post-earthquake replaceable embedded steel plate (4) is a steel plate with vertical seams, and the After the earthquake, the replaceable embedded steel plate (4) is provided with a steel plate vertical seam (43).