CN108222286A - Prefabricated modular buckling restrained brace bolted and welded connection node - Google Patents

Abstract

The invention discloses a prefabricated modular buckling constrained support bolted and welded hybrid connection node, which belongs to the field of energy dissipation and shock absorption of building structures. The hybrid connection node includes prefabricated steel node modules, buckling-restrained braces, connecting high-strength bolts, fixing high-strength bolts and connecting welds. The buckling-restrained braces are arranged along the diagonal direction of the frame structure composed of structural beams and structural columns. The prefabricated steel node module includes the first prefabricated steel node module, the second prefabricated steel node module, the third prefabricated steel node module and the fourth prefabricated steel node module; the present invention has the advantages of short node connection length, large out-of-plane rigidity, simple construction and installation and The advantages of easy replacement after the earthquake. The method of assembling four prefabricated steel node modules with the support connection section greatly reduces the length of the traditional bolt connection, and at the same time, the length of the energy dissipation section can be increased according to the design ratio, and the energy dissipation performance of the buckling restrained support can be improved under the same engineering conditions.

Description

Prefabricated modular buckling-restrained bracing bolted-welded hybrid joints

technical field

The invention relates to a prefabricated modular buckling constrained support bolted and welded hybrid connection node, which belongs to the field of energy dissipation and shock absorption of building structures.

Background technique

Buckling-restrained bracing combines the functions of traditional bracing and metal energy-dissipating dampers, and has the advantages of good tension-compression symmetry and stable hysteresis performance. It can increase the lateral stiffness of the structure in frequent earthquakes, and use the inner core Plastic deformation energy dissipation after yielding. The concept of buckling-restrained braces was first proposed by Japanese scholar Yoshino et al. in 1971, and has been widely used in Japan and the United States since then. In recent years, with the construction of high-rise and super high-rise buildings in China, more and more studies and applications of buckling-restrained braces have been conducted in my country. There are various forms of buckling-constrained supports. The inner core is generally straight and cross-shaped, and the connecting section is mainly designed to be cross-shaped to increase the bending stiffness of the section. In general, buckling-restrained braces are connected to the structure by bolts, welds, and pins. Due to the relatively difficult construction and installation of the pin connection method, it is rarely used in actual engineering. At present, bolted connection and welding connection are mainly used. These two connection methods have the following problems:

(1) The problem that the bolt connection section is too long

The traditional bolted connection uses a spliced plate to connect the buckling-constrained brace and the gusset plate through high-strength bolts, resulting in an excessively long connecting section of the brace and a relatively short energy-dissipating section, which seriously affects the energy-dissipating performance of the brace in earthquakes; at the same time, the connecting section If it is too long, local buckling may occur in an earthquake, affecting the normal use of buckling restrained supports and causing greater damage to the structure.

(2) Construction and installation problems of welding connections and welding process problems

The traditional welding connection needs to weld the gusset plate and the beam-column, and then connect the buckling-constrained support and the gusset plate with a butt weld. It is also necessary to completely fix the support position, which is difficult for construction and installation; welding the gusset plate and beam column is not conducive to the replacement and repair of the support after the earthquake; the entire installation process requires multiple welding, and the support may exist due to the influence of the construction environment and welding process. A certain initial eccentricity is prone to out-of-plane buckling failure under earthquake action, which affects its energy dissipation performance.

Contents of the invention

In order to solve the problems caused by the traditional bolted connection and welded connection on the length of the connecting section of the buckling restraint support, the stability of the node outside the plane, the energy dissipation performance, the replacement after the earthquake, and the construction and installation, a method of reducing the length of the connecting section is proposed. , increase the out-of-plane stiffness of the joints, and make the post-earthquake replacement and construction installation easier and more convenient.

The technical scheme that the present invention solves the problems of the technologies described above is:

The prefabricated modular buckling-constrained brace bolted-welded hybrid connection node includes a prefabricated steel node module, a buckling-constrained brace 3 , connecting high-strength bolts 8 , fixing high-strength bolts 9 and connecting welds 10 .

The buckling restraint support 3 is arranged along the diagonal direction of the frame structure composed of the structural beam 1 and the structural column 2;

The prefabricated steel node modules include the first prefabricated steel node module 4, the second prefabricated steel node module 5, the third prefabricated steel node module 6 and the fourth prefabricated steel node module 7; the first prefabricated steel node module 4, the second prefabricated steel node module Module 5, the third prefabricated steel node module 6 and the fourth prefabricated steel node module 7 have the same structural form; the first prefabricated steel node module 4 and the second prefabricated steel node module 5 are fixed on the structural beam 1 by connecting high-strength bolts 8; The three prefabricated steel node modules 6 and the fourth prefabricated steel node module 7 are fixed on the structural column 2 by connecting high-strength bolts 8 .

A cross-shaped groove is formed between the first prefabricated steel node module 4, the second prefabricated steel node module 5, the third prefabricated steel node module 6 and the fourth prefabricated steel node module 7; plate, the cross-shaped board and the cross-shaped groove are connected by fixing high-strength bolts 9; the connecting weld 10 is arranged at the edge where the cross-shaped board and the cross-shaped groove are connected and matched.

The prefabricated steel node module includes a connecting steel plate 11, a clamping steel plate 12 and a clamping and fixing steel plate 13; several bolt holes are arranged longitudinally on the connecting steel plate 11, and a bolt hole is arranged on the clamping and fixing steel plate 13; the connecting steel plate 11 and the clamping and fixing steel plate 13 is vertically welded on the clamping steel plate 12, and the end of the connecting steel plate 11 is connected with the end of the clamping and fixing steel plate 13 to form a triangular structure.

The cross-shaped plate of the connecting section of the buckling-constrained support 3 is welded by steel plates, and a bolt hole is symmetrically arranged on two of the steel plates.

An installation method of a prefabricated modular buckling-restrained bracing bolted-welded hybrid joint, the method comprising the following steps:

S1 Machining of prefabricated steel node modules and buckling restraint braces 3;

S2 The first prefabricated steel node module 4 and the second prefabricated steel node module 5 are fastened to the structural beam 1 through high-strength bolts 8;

S3 hoisting the buckling restraint support 3, inserting the cross plate of the support connection section into the groove between the first prefabricated steel node module 4 and the second prefabricated steel node module 5;

S4 The third prefabricated steel node module 6 and the fourth prefabricated steel node module 7 are fastened to the structural column 2 through high-strength bolts 8;

S5 installs and fixes the high-strength bolt 9;

S6 is welded at the edge where the cross-shaped board and the cross-shaped groove are connected and matched to form a connecting weld 10 .

The invention has the following beneficial effects: the invention has the advantages of short node connection length, high out-of-plane rigidity, simple construction and installation, and convenient replacement after an earthquake. Advantage of the present invention is embodied in the following aspects:

1. The present invention adopts the method of assembling four prefabricated steel node modules and the supporting connection section, which greatly reduces the length of the traditional bolt connection, and at the same time increases the length of the energy-consuming section according to the design ratio, and improves the buckling restraint support under the same engineering conditions. energy consumption performance.

2. The supporting connection section in the present invention is fixed by four prefabricated steel node modules, and the out-of-plane rigidity is greater than that of ordinary connection forms, which can effectively prevent local buckling damage of the supporting connecting nodes.

3. The prefabricated steel node module in the present invention is processed in the factory, which can ensure the accuracy of each dimension; the prefabricated steel node module is connected with the main body of the beam and column by bolts, which is convenient for the replacement of the buckling restraint support after the earthquake; the support connection section and the prefabricated steel node The module adopts the form of welded connection. Compared with too many bolt connections, the welded connection is not limited by the installation space, and the construction is more convenient; when the support connection section is welded to the prefabricated steel node module, the support position can be fixed by fixed high-strength bolts, reducing Welding is difficult, and at the same time, welding after the support position is fixed can effectively avoid the initial eccentricity of the support.

Description of drawings

Fig. 1 is the overall schematic diagram of the present invention.

Fig. 2 is a partial assembly schematic diagram of the present invention.

Figure 3 is a front view of a partial structure of a buckling restrained brace.

FIG. 4 is a right side view of FIG. 3 .

FIG. 5 is a top view of FIG. 3 .

Fig. 6 is a perspective view of a partial structure of a buckling-constrained support.

Fig. 7 is a front view of the construction of the first prefabricated steel node module.

FIG. 8 is a left side view of FIG. 7 .

FIG. 9 is a top view of FIG. 7 .

Fig. 10 is a perspective view of the first prefabricated steel node module.

Figures 11 to 16 are construction and installation flow charts.

Fig. 17 is a sectional view of A-A in Fig. 16 .

In the figure: 1. Structural beam; 2. Structural column; 3. Buckling restraint support; 4. The first prefabricated steel node module; 5. The second prefabricated steel node module; 6. The third prefabricated steel node module; 7. The fourth Prefabricated steel node module; 8. Connecting high-strength bolts; 9. Fixing high-strength bolts; 10. Connecting welds; 11. Connecting steel plates; 12. Clamping steel plates; 13. Clamping and fixing steel plates.

Detailed ways

Referring to FIG. 2 , the prefabricated modular buckling-constrained brace bolted-welded hybrid connection node in this embodiment includes prefabricated steel node modules, buckling-constrained braces 3 , connecting high-strength bolts 8 , fixed high-strength bolts 9 and connecting welds 10 .

Referring to Figs. 3 to 6, it is illustrated that the cross-shaped plate of the connecting section of the buckling-constrained support 3 is welded by steel plates, and a bolt hole is arranged symmetrically on two of the steel plates.

2 and FIGS. 7 to 10 illustrate that the first prefabricated steel node module 4, the second prefabricated steel node module 5, the third prefabricated steel node module 6 and the fourth prefabricated steel node module 7 all include connecting steel plates 11, clamping Steel plate 12 and clamping and fixing steel plate 13; Some bolt holes are arranged longitudinally on the connecting steel plate 11, and a bolt hole is arranged on the clamping and fixing steel plate 13; The end of the steel plate 11 is connected to the end of the clamping and fixed steel plate 13 to form a triangular structure.

11 to 16 illustrate that prefabricated steel node modules and buckling restraint supports 3 are processed in the factory; the first prefabricated steel node module 4 and the second prefabricated steel node module 5 are fixed to the structural beam 1 by connecting high-strength bolts 8 ; Hoist the buckling-constrained support 3, insert the cross plate of the support connection section into the groove between the first prefabricated steel node module 4 and the second prefabricated steel node module 5; the third prefabricated steel node module 6 and the fourth prefabricated steel node module The node module 7 is fastened to the structural column 2 by connecting high-strength bolts 8; at this time, the cross-shaped plate of the connection section of the buckling restraint support 3 is clamped by the prefabricated steel node module, and the bolt holes for fixing the support are aligned by adjusting the position of the support , use fixed high-strength bolts 9 to assemble the prefabricated steel node module and the buckling-constrained support connection section together to fix the support position. The other end of the support is installed correspondingly, and the installation sequence is the same. Finally, the prefabricated steel node module and the buckling restraint support 3 are fixed through the connecting weld 10 .

Prefabricated steel node modules and buckling restraint supports in the factory can ensure machining accuracy and reduce on-site construction workload; this prefabricated modular buckling restraint support bolted and welded hybrid connection greatly reduces the length of traditional bolted connections; and clamps and fixes steel plates 13 The stiffness of the buckling-restrained bracing connection node is increased; the prefabricated steel node module and the structural beam 1 and structural column 2 are connected by bolts to facilitate the replacement of the buckling-restraining bracing 3 after the earthquake; before welding, the buckling-restraining bracing 3 position has been fixed with high strength The bolt 9 is fixed, which can effectively prevent the eccentricity of the initial test caused by welding; and the use of welded connection can avoid the influence of too many bolts being affected by the construction space limitation, and the construction is more convenient.

Claims (4)

1. prefabricated modular buckling restrained brace bolted and welded connection node, it is characterised in that：The Hybrid connections node includes pre- Steel node module processed, buckling restrained brace (3), connection high-strength bolt (8), fixed high-strength bolt (9) and attachment weld (10)；

The diagonal of frame structure that buckling restrained brace (3) is formed along structural beams (1) and structural column (2) is laid；

Pre-manufactured steel node module includes the first pre-manufactured steel node module (4), the second pre-manufactured steel node module (5), third pre-manufactured steel Node module (6) and the 4th pre-manufactured steel node module (7)；First pre-manufactured steel node module (4), the second pre-manufactured steel node module (5), third pre-manufactured steel node module (6) is identical with the 4th pre-manufactured steel node module (7) structure type；First pre-manufactured steel node mould Block (4) and the second pre-manufactured steel node module (5) are fixed on by connecting high-strength bolt (8) in structural beams (1)；Third pre-manufactured steel section Point module (6) and the 4th pre-manufactured steel node module (7) are fixed on by connecting high-strength bolt (8) on structural column (2)；

First pre-manufactured steel node module (4), the second pre-manufactured steel node module (5), third pre-manufactured steel node module (6) and the 4th are pre- Cross groove is formed between steel node module (7) processed；The linkage section of buckling restrained brace (3) be cross plate, cross Plate is connect with cross groove by fixed high-strength bolt (9)；Attachment weld (10) is arranged on cross plate and cross The edge of groove connection cooperation.

2. prefabricated modular buckling restrained brace bolted and welded connection node according to claim 1, it is characterised in that：In advance Steel node module processed includes junction steel plate (11), clamping steel plate (12) and grips steel plate (13)；Junction steel plate (11) upper edge Several bolts hole are longitudinally arranged, grip one bolt hole of arrangement on steel plate (13)；Junction steel plate (11) and grip steel Plate (13) is vertically welded on clamping steel plate (12), and the end of junction steel plate (11) is connected with the end for gripping steel plate (13) Form triangular structure form.

3. prefabricated modular buckling restrained brace bolted and welded connection node according to claim 1, it is characterised in that：It bends By four blocks of steel plates, sequentially vertical welding is made the cross plate of song constraint support (3), on the steel plate that two of which is arranged symmetrically If there are one bolts hole.

4. the installation method carried out using Hybrid connections node described in claim 1, it is characterised in that：This method includes following step Suddenly,

S1 processes pre-manufactured steel node module and buckling restrained brace (3)；

S2 the first pre-manufactured steel node modules (4) and the second pre-manufactured steel node module (5) by high-strength bolt 8 and structural beams (1) into Row is affixed；

S3 lifting buckling restrained braces (3), will the inserting of support linkage section cross plug board to the first pre-manufactured steel node module (4) and the In groove between two pre-manufactured steel node modules (5)；

S4 third pre-manufactured steel node modules (6) and the 4th pre-manufactured steel node module (7) by high-strength bolt 8 and structural column (2) into Row is affixed；

The fixed high-strength bolt (9) of S5 installations；

The edge that S6 connect with cross groove cooperation in cross plate is welded, and forms attachment weld (10).