CN113789862A - Function-recoverable assembly type multi-limb square column and assembly method thereof - Google Patents

Abstract

The invention provides an assembly type multi-limb square column capable of recovering functions and an assembly method thereof, wherein the assembly type multi-limb square column comprises a holding type steel structure, a damper and a plurality of limb columns which are arranged in a rectangular shape, two adjacent limb columns are rigidly connected, the holding type steel structure is positioned between the limb columns, a steel bracket of the holding type steel structure is positioned at the upper end of the bracket, holding rubber transmits load to the bracket through the steel bracket, the holding rubber has certain elasticity, the holding rubber can deform under pressure near the bracket area, the holding rubber can enable a core column to have a larger displacement trend, the multi-limb square column can automatically restore in small or middle earthquakes, and after a large earthquake, the structural functions of the multi-limb square column can be quickly recovered only by replacing the damper and readjusting the positions of all parts.

Description

Function-recoverable assembly type multi-limb square column and assembly method thereof

Technical Field

The invention relates to the technical field of structures, in particular to an assembly type multi-limb square column capable of recovering functions and an assembly method thereof.

Background

The structural column is an important component for bearing a building structure, bears main vertical force in an earthquake, and if the structural column is damaged by a large earthquake action in the earthquake, the structural column needs to be maintained and reinforced lightly, and the building loses safety capability heavily. The restorable function is a novel structural function form, and the structure with the restorable function can be simply restored after a small earthquake and can be replaced in time after a large earthquake to quickly restore the structural function.

The technical scheme includes that the restorable function of the structural square column can be achieved through the steps of installing the core column, attaching the side columns to the core column, then installing the steel beam and the inclined web member, filling plain concrete and fixedly connecting the replaceable components. However, in the technical scheme, the variable cross-section parts of the side columns are more, the arc-shaped area parts exist, and the concrete material has higher brittleness, so that the construction difficulty of the side columns in the technical scheme is high, and the core column and the side columns are easily mutually extruded in the earthquake process to cause the crushing of partial areas, thereby causing the damage of members.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides the assembly type multi-limb square column with the restorable function and the assembly method thereof, the assembly type multi-limb square column has the restorable function and is easy to construct, and the crushing and damage phenomena among members can not occur.

The invention is realized by the following technical scheme:

an assembly type multi-limb square column capable of recovering functions comprises a force-bearing section steel structure, a force-bearing plate, a damper and a plurality of limb columns which are arranged in a rectangular shape, wherein two adjacent limb columns are rigidly connected, the force-bearing section steel structure is positioned between the four limb columns, and the force-bearing plate is positioned below the force-bearing section steel structure and is connected with the limb columns;

hold power shaped steel structure and include the square steel pipe, the outside cladding of square steel pipe has holds power rubber, and the equipartition has a plurality of horizontally steel corbels on the lateral wall of square steel pipe, and a plurality of steel corbels are buried in holding power rubber, hold power rubber and the corbel of a plurality of limb posts and be connected, are provided with the stem in the square steel pipe, and the lower extreme of stem passes to hold the lower extreme of power board and damper and is connected, and the upper end of damper is connected with the bottom of holding the power board.

Preferably, the holding rubber is positioned on top of the corbel, and the end of the steel corbel is positioned above the corbel.

Preferably, the plurality of steel corbels are arranged in a cross shape, and the axes of the coaxial steel corbels are parallel to the diagonal lines of the two diagonal limb columns.

Preferably, the same height of two adjacent lateral walls of limb post all is provided with the bracket, and the top of two brackets all sets up a steel bracket, two steel bracket parallel arrangement.

Preferably, at least one end of the square steel tube is provided with a variable cross-section steel tube, and the variable cross-section steel tube is connected with the core column and used for preventing the core column and the square steel tube from generating relative displacement;

the variable cross-section steel pipe is of a horn-shaped structure, one end of the variable cross-section steel pipe, which is small in diameter, is connected with the end of the square steel pipe, the other end of the variable cross-section steel pipe extends along the axial direction, and the included angle between the inclined edges of the upper side and the lower side of the variable cross-section steel pipe and the vertical direction is smaller than a friction angle.

Preferably, the steel corbel is I-steel, the lower flange of the I-steel is parallel to the horizontal plane, the upper flange of the I-steel forms a certain included angle with the horizontal plane, and the cross-sectional area of the web of the I-steel at one end far away from the square steel pipe is smaller than that at one end close to the square steel pipe.

Preferably, the number of holding power shaped steel structure is a plurality of, and a plurality of holding power shaped steel structures top-down interval sets up to the stem is overall structure among a plurality of holding power shaped steel structures.

Preferably, the center of the holding plate is provided with a through hole, and the through hole is in clearance fit with the core column.

Preferably, the upper end of the core column is provided with a column head groove used for being connected with the main beam or the secondary beam.

A method for assembling an assembled multi-limb square column capable of recovering functions comprises the following steps:

s1, preparing limb columns and preparing corbels;

s2, arranging steel corbels on the outer walls of the square steel pipes, arranging anti-shearing pieces inside the square steel pipes and the variable cross-section steel pipes, and forming holding rubber on the steel corbels and on the outer sides of the square steel pipes;

s3, arranging preset positions of the three limb columns, installing the brackets at the preset positions of the limb columns, connecting the brackets of two adjacent limb columns through a bracket connecting beam, and installing a connecting steel beam between two adjacent upright columns;

s4, respectively installing the holding rubber and the holding plate on the tops of the bracket and the connecting beam, and fixing the holding rubber and the bracket by adopting detachable weak connection;

s5, mounting the last limb column to a preset position, completing the connection of all the corbel connecting beams and the connecting steel beams, and removing the weak connection;

s6, respectively erecting templates on the upper side and the lower side of the square steel pipe, respectively pouring a core column and a bearing column cap, and embedding an embedded part for connecting with a connecting plate during pouring;

s7, mounting a connecting plate at the lower end of the core column;

s8, applying a vertical upward supporting force to the connecting plate by using mechanical equipment to lift the upper top surface of the core column to a preset elevation;

s9, pouring a beam on the upper top surface of the core column, wherein a part of steel bars, anchoring steel bars and steel bar protective layers are reserved on the upper part of the beam during beam pouring and are not poured;

s10, installing a damper between the connecting plate and the holding plate;

s11, unloading the mechanical equipment in the S8;

s12: and then casting the thicknesses of the steel bars, the anchoring steel bars and the steel bar protective layers reserved at the upper parts of the middle beams in the S9.

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

the invention provides an assembly type multi-limb square column capable of recovering functions, which comprises a square column formed by a plurality of limb columns, wherein a holding type steel structure is arranged in the square column, holding rubber of the holding type steel structure is connected with a bracket of the limb columns, a steel bracket of the holding type steel structure is positioned at the upper end of the bracket, the holding rubber steel bracket transmits load to the bracket, the holding rubber has certain elasticity, the holding rubber can deform under pressure near the bracket area, and the holding rubber can enable a core column to have a larger relative displacement trend.

Furthermore, the supporting plate is in clearance fit with the core column, the supporting plate cannot limit the displacement trend of the core column, the lower part of the core column is connected with a plurality of dampers, when the core column generates the displacement trend relative to the supporting plate, the dampers can generate corresponding energy consumption effects, the effects can help the multi-limb square column to dissipate a large amount of seismic energy, the multi-limb square column can automatically restore in small or middle earthquakes, and the structural function of the multi-limb square column can be quickly restored only by replacing the dampers and readjusting the positions of all parts after a major earthquake.

Drawings

FIG. 1 is a schematic structural diagram of a middle limb column and a bracket of an assembled multi-limb square column with recoverable functions, which is disclosed by the invention;

FIG. 2 is a schematic structural diagram of a holding-force steel structure in an assembled multi-limb square column capable of recovering functions according to the invention;

FIG. 3 is a schematic structural diagram of another holding-force steel structure in the assembled multi-limb square column with recoverable function according to the invention;

FIG. 4 is a front view of the holding steel structure of FIG. 3;

FIG. 5 is a schematic view of the position structure of the bracket and the holding-force steel structure of the present invention;

FIG. 6 is a front view of the position of the structural steel of the holding force type and the bracket of the present invention;

FIG. 7 is a top view of the position of the holding-force steel structure and the bracket of the present invention;

FIG. 8 is a sectional view of the combination of the holding steel structure and the holding rubber of the present invention;

FIG. 9 is a schematic structural diagram of a functionally recoverable assembled multi-limb square post according to the present invention;

FIG. 10 is a front view of a modular multi-limb square post of the invention with recoverable functionality;

FIG. 11 is a partially cut-away schematic view of a functionally recoverable fabricated multi-limb square post of the present invention;

FIG. 12 is a partial cross-sectional view showing the positions of the connecting steel beams, the holding plates and the connecting plates in the assembled multi-limb square column with recoverable functions according to the present invention;

fig. 13 is a schematic structural diagram of the holding plate of the present invention.

In the figure, 1 is a limb column, 2 is a corbel, 21 is a corbel connecting beam, 3 is a holding steel structure, 31 is a square steel pipe, 32 is a shear resistant part, 33 is a steel corbel, 34 is a variable cross-section steel pipe, 4 is holding rubber, 5 is a bearing column head, 51 is a first X-direction groove, 52 is a first Y-direction groove, 6 is a holding plate, 7 is a connecting steel beam, 8 is a damper, 9 is a connecting plate, and 10 is a core column.

Detailed Description

The present invention will now be described in further detail with reference to the attached drawings, which are illustrative, but not limiting, of the present invention.

Referring to fig. 1-13, an assembled multi-limb square column capable of recovering functions comprises a holding-force steel structure 3, a damper and a plurality of limb columns 1 which are arranged in a rectangular shape, wherein two adjacent limb columns 1 are rigidly connected, the holding-force steel structure 3 is positioned between the plurality of limb columns 1, and the damper is positioned at the lower part of a holding plate 6 and is connected with a connecting plate 9 at the bottom of a core column 10.

Hold power shaped steel structure 3 includes square steel pipe 31, and square steel pipe 31's outside cladding has and holds power rubber 4, and the equipartition has a plurality of horizontally steel corbels 33 on square steel pipe 31's the lateral wall, and a plurality of steel corbels 33 are buried in holding power rubber 4, are provided with bracket 2 on two 1 relative lateral walls of limb post, and the shaping is pour to limb post 1 and 2 an organic whole of bracket, hold power rubber 4 and the bracket 2 weak link, be provided with stem 10 in the square steel pipe 31, the lower extreme of stem 10 passes square steel pipe 31 in proper order and holds power board 6 and be connected with connecting plate 9.

The square steel tube 33 is a thin-wall square steel tube, two steel brackets 33 are arranged on each side wall of the square steel tube 33, one end of each steel bracket 33 is fixedly connected with the side wall of the square steel tube 31, and the other end of each steel bracket 33 is located above the weak connection position of the supporting rubber 4 and the corresponding bracket 2.

The shear resistant part 32 is arranged inside the square steel tube 31, one end of the shear resistant part 32 is connected with the square steel tube 31, the other end of the shear resistant part 32 and the core column 10 are cast together, in this embodiment, the core column 10 is a cast-in-place concrete column, and the core column 10 and the holding-force steel structure 3 form a whole through the shear resistant part 32.

In another embodiment, the upper and lower ends of the square steel tube 31 are symmetrically provided with variable cross-section steel tubes 34, and the variable cross-section steel tubes 34 are connected with the core column 10 and used for preventing the core column 10 and the holding force type steel structure 3 from generating relative displacement. The variable cross-section steel pipe 34 is of a horn-shaped structure, one end of the variable cross-section steel pipe 34 with a small diameter is connected with the end of the square steel pipe 31, the other end of the variable cross-section steel pipe 34 extends along the axial direction, the included angle between the inclined edges of the upper side and the lower side of the variable cross-section steel pipe 34 and the column height direction of the limb column 1 is smaller than a friction angle, and the core column 10 is formed by pouring concrete, so that the shape of the core column 10 is the same as the shapes of the variable cross-section steel pipe 34 and the square steel pipe 31 when the holding force type steel structure 3 is inside, the part of the core column 10 outside the holding force type steel structure 3 is the same as the inner interface of the variable cross-section steel pipe 34, the variable cross-section steel pipe 34 and the core column 10 cannot displace mutually, and the stress integrity between the core column 10 and the holding force type steel structure 3 is further improved.

In this embodiment, the upper surface and the lower surface of the holding rubber 4 are flush with the top and the bottom of the two variable cross-section steel pipes 34, respectively, and the core column 10 is anchored to the square steel pipe 31 and the variable cross-section steel pipes 34 through the shear resistant members 32, so that the core column 10 and the holding rubber 4 have good stress integrity and are deformed under stress together.

The bottom flange of steel bracket 33 is parallel with the horizontal plane, and the certain contained angle is personally submitted with the horizontal plane to the top flange, and the web is close to the in-process of square steel pipe 3 from the one side of keeping away from square steel pipe 31 in the steel bracket 33, and the web cross-section crescent.

Referring to fig. 5-10 again, the side walls of two adjacent limb columns 1 are provided with two corbels 2 at the same height, each side wall of the square steel tube 31 is provided with two parallel steel corbels 33, the axial directions of the two steel corbels 33 are parallel to the diagonal lines of the two diagonal limb columns 1, the holding rubber 4 is of a rectangular structure, each vertex angle is provided with a clamping groove matched with the limb column 1, the holding rubber 4 is supported on the corbel 2, the free end of each steel corbel 33 is located above the supporting end, a corbel connecting beam 21 is arranged between the two opposite corbels 2, two ends of each corbel connecting beam 21 are respectively connected with the corbels 2 of the two adjacent limb columns 1, each corbel connecting beam 21 is made of i-steel, and each corbel connecting beam 21 and each corbel 2 are detachably connected through an embedded part.

The number of the holding force type steel structures 3 is multiple, the holding force type steel structures 3 are arranged at intervals from top to bottom, and the core columns 10 of the holding force type steel structures 3 are of an integral structure. For example, in the present embodiment, three holding force type steel structures 3 are included from top to bottom, and the core column 10 connects the three holding force type steel structures 3.

A connecting steel beam 7 is further connected between every two adjacent limb columns 1, the connecting steel beam 7 and the limb columns 1 are detachably connected through embedded parts, the holding plate 6 is located on the top surface of the connecting steel beam 7, the holding plate 6 is a concrete prefabricated plate, the plane structure of the concrete prefabricated plate is the same as that of the holding rubber 4, a right-angle clamping groove matched with the limb columns 1 is formed in the holding plate 6, the holding plate 6 is connected with the connecting steel beam 7 through the embedded parts, a through hole is formed in the center of the holding plate 6, and a small gap is reserved between the core column 10 and the through hole, so that the core column 10 and the holding plate 6 can be displaced relatively; when the variable cross-section steel pipe 34 is arranged at the end part of the square steel pipe 31, the through hole of the holding plate 6 is slightly larger than the cross section surrounded by the maximum outer diameter of the variable cross-section steel pipe 34, and the core column 10 at the corresponding position of the square steel pipe 31 can pass through the through hole of the holding plate 6.

The top of the holding plate 6 is set to have a certain distance from the nearest bracket 2, so that the mounting construction of the holding plate 6 is facilitated when the holding plate 6 and the bracket 2 are not structurally collided, the lower end of the core column 10 is provided with a connecting plate 9, the connecting plate 9 and the core column 10 are connected with an embedded part, a plurality of dampers can be detachably connected onto the connecting plate 9, and the upper ends of the dampers and the lower end of the holding plate 6 can be detachably connected.

The upper end of stem 10 is provided with bears column cap 5, and there is the cross column cap recess that is used for connecting main beam or secondary beam at the top that bears column cap 5, and the column cap recess is including being the first X of cross arrangement to recess 51 and first Y to recess 52, and the horizontal and vertical two central lines that form with four limb posts 1 of cross recess are parallel respectively, be convenient for bear column cap 5 internal pouring with the roof beam in, guarantee that the square post atress of this application multi-limb is even.

The assembling method of the assembled multi-limb square column capable of recovering the function comprises the following steps:

s1: preparing a limb column 1 and a bracket 2, wherein the limb column 1 and the bracket 2 are not assembled after being manufactured;

s2: selecting whether a variable cross-section steel pipe 34 is fixedly connected to the upper end and the lower end of a square steel pipe 31, arranging a steel corbel 33 on the outer wall of the square steel pipe 31, arranging a shear resistant part 32 on the inner parts of the square steel pipe and the variable cross-section steel pipe, supporting a mold at the end part of the steel corbel 33, forming a holding rubber 4 on the steel corbel 33 and the outer side of the square steel pipe 31 in a film pressing forming mode, and embedding a connecting part for connecting with a corbel 2 in the holding rubber 4;

s3: firstly, 3 limb columns 1 are installed, then a bracket connecting beam 21 is connected between two opposite brackets 2, and a connecting steel beam 7 is installed between the limb columns 1 with opposite end surfaces;

s4: arranging the holding rubber 4 and the holding plate 6 at preset positions of the limb column 1, then attaching the limb column 1 to the holding rubber 4 and the holding plate 6, and fixing the limb column 1 by adopting detachable weak connection;

s5: mounting the last limb column 1 at a preset position, completing the connection of all the corbel connecting beams 21 and the connecting steel beams 7, and removing the weak connection;

s6: respectively erecting templates on the upper side and the lower side of the square steel pipe 31, respectively pouring the core column 10 and the bearing column cap 5, and embedding an embedded part for connecting with the connecting plate 9 during pouring;

s7: a connecting plate 9 is arranged at the lower end of the core column 10;

s8: applying a vertical upward supporting force to the connecting plate 9 by adopting mechanical equipment at the lower part thereof, so that the upper top surface of the bearing column head 5 is lifted to a preset elevation;

s9: pouring a beam in the first X-direction groove 51 and the first Y-direction groove 52, and reserving a part of reinforcing steel bars, anchoring reinforcing steel bars and reinforcing steel bar protective layers on the upper part of the beam during pouring of the beam without pouring;

s10: installing a replaceable damper 8;

s11: dismantling the mechanical equipment arranged in the S8;

s12: and the thicknesses of the steel bars, the anchoring steel bars and the steel bar protective layers reserved at the upper part of the middle beam of the post-cast S9 are increased.

Regarding the design and selection of the damper 8, the damper 8 should have a large initial strength, ensuring that the damper 8 undergoes a small change in structural shape at the instant the assembly method S11 is completed, in order to ensure a small change in the elevation of the top of the load bearing stud 5. But the elevation of the top of the poured beam is lowered in the step S9, and the pouring of the beam is completed on the top of the reserved steel bars in the step S9, so that the top of the beam reaches the preset elevation.

The structural designer should note that the error between the amount of variation in the elevation at the top of the bearing stud 5 caused by the completion of S11 and the height of the upper portion of the center sill left unset in S9 should be small.

The following is a detailed description of the force-bearing principle of the assembled multi-limb square column with recoverable function provided by the invention, and the detailed description is as follows:

after each holding power shaped steel structure 3 and holding power rubber 4 shaping, then will hold power rubber 4 and bracket 2 and carry out the weak connection, hold power rubber 4 under this condition and both can rely on the inside steel bracket 33 of holding power rubber 4 to transmit the load to bracket 2 on, hold power rubber 4 simultaneously also has certain elasticity, hold power rubber 4 and can take place the compressive deformation near bracket 2 region, set up a plurality of holding power rubber 4 on the square post of many limbs so and just can make the stem 10 take place great displacement trend. In addition, after the holding plate 6 is a reinforced concrete component and is connected with the connecting steel beam 7, no connection exists between the holding plate 6 and the core column 10, and the holding plate 6 does not limit the displacement trend of the core column 10. The lower part of the core column 10 is also connected with a connecting plate 9 through an embedded part, after the connecting plate 9 and the holding plate 6 are detachably connected with a plurality of replaceable dampers 8, when the core column 10 generates a displacement trend relative to the holding plate 6, the dampers 8 generate corresponding energy consumption effects, the effects are beneficial to dissipating a large amount of seismic energy of the multi-limb square column, and the multi-limb square column can automatically restore in a small earthquake or a middle earthquake, and the structural function of the multi-limb square column can be restored quickly by only replacing the dampers 8 and readjusting the positions of all parts after a big earthquake. When the damper 8 is replaced, mechanical equipment is required to apply upward supporting force to the connecting plate 9, and the damper 8 is replaced when the structural safety is confirmed.

After the holding force type steel structure 3 is combined with the holding force rubber 4, the holding force rubber 4 generates certain elastic compression deformation due to the self weight of the holding force type steel structure 3 because the self weight of the holding force type steel structure 3 is large. In addition, when the core column 10 and the rear bearing column head 5 are poured, the dead weight of the core column 10 can enable the elastic compression deformation of the holding rubber 4 to be larger, so that after the core column 10 and the bearing column head 5 are poured, mechanical equipment is needed to apply supporting force upwards from the lower part of the connecting plate 9, the deformation of the holding rubber 4 is recovered, the upper top surface of the bearing column head 5 is lifted to a preset elevation, and finally the replaceable damper 8 is connected.

The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.

Claims (10)

1. An assembly type multi-limb square column capable of recovering functions is characterized by comprising a holding-force steel structure (3), a holding-force plate (6), a damper and a plurality of limb columns (1) which are arranged in a rectangular shape, wherein two adjacent limb columns are rigidly connected, the holding-force steel structure (3) is positioned among the four limb columns (1), and the holding-force plate (6) is positioned below the holding-force steel structure (3) and is connected with the limb columns (1);

hold power shaped steel structure (3) including square steel pipe (31), the outside cladding of square steel pipe (31) has and holds power rubber (4), the equipartition has a plurality of horizontally steel corbels (33) on the lateral wall of square steel pipe (31), a plurality of steel corbels (33) are buried in holding power rubber (4), hold power rubber (4) and be connected with bracket (2) of a plurality of limb posts (1), be provided with stem (10) in square steel pipe (31), the lower extreme of stem (10) passes and holds the lower extreme of power board (6) and damper and be connected, the upper end of damper with hold the bottom of power board (6) and be connected.

2. A functionally restorable fabricated multi-legged square column according to claim 1, characterized in that the holding rubber (4) is located on top of the corbel (2) and the end of the steel corbel (33) is located above the corbel (2).

3. A functionally restorable assembled multi-limb square column according to claim 1, wherein a plurality of steel corbels (33) are arranged in a cross shape, and the axes of the coaxial steel corbels (33) are parallel to the diagonal of the two diagonal limb columns (1).

4. A recoverable-function assembled multi-limb square column according to claim 3, wherein the two adjacent side walls of the limb column (1) are provided with corbels (2) at the same height, a steel corbel (33) is arranged above each corbel (2), and the two steel corbels (33) are arranged in parallel.

5. The assembled multi-limb square column capable of recovering functions as claimed in claim 1, wherein at least one end of the square steel tube (31) is provided with a variable cross-section steel tube (34), and the variable cross-section steel tube (34) is connected with the core column (10) and is used for preventing the core column (10) and the square steel tube (31) from relative displacement;

the variable cross-section steel pipe (34) is of a horn-shaped structure, one end of the variable cross-section steel pipe (34) with a small diameter is connected with the end of the square steel pipe (31), the other end of the variable cross-section steel pipe extends along the axial direction, and the included angle between the inclined edges of the upper side and the lower side of the variable cross-section steel pipe (34) and the vertical direction is smaller than a friction angle.

6. The assembled multi-limb square column capable of recovering functions as claimed in claim 1, wherein the steel corbel (33) is an I-steel, the lower flange of the I-steel is parallel to the horizontal plane, the upper flange of the I-steel forms a certain included angle with the horizontal plane, and the cross-sectional area of the web of the I-steel from one end far away from the square steel pipe is smaller than that of one end close to the square steel pipe.

7. The assembled multi-limb square column capable of restoring functions as claimed in claim 1, wherein the number of the holding force steel structures (3) is multiple, the holding force steel structures (3) are arranged at intervals from top to bottom, and the core columns (10) in the holding force steel structures (3) are of an integral structure.

8. A functionally restorable fabricated multi-limb square column according to claim 7, wherein the center of the holding plate (6) is provided with a through hole, and the through hole is in clearance fit with the core column (10).

9. A functionally restorable fabricated multi-limb square column according to claim 7, wherein the upper end of the stem (10) is provided with a stud recess for connection with a primary or secondary beam.

10. A method of assembling a functionally restorable assembled multi-limb square post according to any of claims 1 to 9, comprising the steps of:

s1, preparing a limb column (1) and preparing a corbel (2);

s2, arranging a steel corbel (33) on the outer wall of the square steel pipe (31), arranging a shear resistant piece (32) on the inner parts of the square steel pipe and the variable cross-section steel pipe, and forming holding rubber (4) on the steel corbel (33) and on the outer side of the square steel pipe (31);

s3, arranging preset positions of the three limb columns, installing the bracket (2) at the preset position of the limb column (1), connecting the brackets of two adjacent limb columns through a bracket connecting beam (21), and installing a connecting steel beam (7) between two adjacent upright columns;

s4, respectively installing the holding rubber (4) and the holding plate (6) on the tops of the bracket (2) and the connecting beam (7), and fixing the holding rubber (4) and the bracket (2) through detachable weak connection;

s5, mounting the last limb column (1) to a preset position, completing the connection of all the corbel connecting beams (21) and the connecting steel beams (7), and removing the weak connection;

s6, respectively erecting templates on the upper side and the lower side of the square steel pipe (31), respectively pouring a core column (10) and a bearing column cap (5), and embedding an embedded part for connecting with a connecting plate (9) during pouring;

s7, mounting a connecting plate (9) at the lower end of the stem (10);

s8, applying a vertical upward supporting force to the connecting plate (9) by adopting mechanical equipment to lift the upper top surface of the core column (10) to a preset elevation;

s9, pouring a beam on the upper top surface of the core column (10), and reserving a part of steel bars, anchoring steel bars and steel bar protective layers on the upper part of the beam during beam pouring to be not poured;

s10, installing a damper between the connecting plate (9) and the holding plate;

s11, unloading the mechanical equipment in the S8;

s12: and then casting the thicknesses of the steel bars, the anchoring steel bars and the steel bar protective layers reserved at the upper parts of the middle beams in the S9.

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