CN103233525A - Channel steel assembling type steel structure prestress anti-bending support - Google Patents

Abstract

The utility model relates to a prestressed anti-buckling support of a channel steel assembled steel structure, which belongs to the technical field of building construction. Including internal energy-dissipating chips (2), peripheral frame constraining components (3), and prestressed cables (4); internal energy-dissipating chips (2) are inserted into the middle gap of peripheral frame constraining components (3); internal energy-dissipating chips (2 ) are arranged with transverse stiffeners (7) along the length direction, and the prestressed cables (4) are symmetrically arranged on both sides of the internal energy-dissipating chip (2), passing through the transverse stiffeners (7); the internal energy-dissipating chip (2) Axial deformation energy dissipation, the length of the internal energy dissipation chip (2) is longer than the peripheral frame constraining member (3); the two ends of the internal energy dissipating chip (2) protrude from the surrounding frame constraining member (3). When the horizontal force acts on the structure, the horizontal force component of the I-shaped fabricated steel structure prestressed anti-buckling support reduces or even offsets the horizontal force acting on the structure, so that the interstory displacement of the structure is a small value, which meets the specification requirements.

Description

Prestressed anti-buckling bracing of channel steel fabricated steel structure

technical field

The invention relates to a novel supporting structure form, in particular to a channel steel assembled steel structure prestressed anti-buckling support used in the construction field. the

Background technique

Due to its high stiffness, the traditional support usually yields when the tensile stress exceeds the elastic limit under strong earthquakes, resulting in irrecoverable residual deformation; when it is under compression, it is prone to compressive buckling. Under the repeated action of earthquakes, its energy dissipation effect is not great, and it is difficult to better protect the main structure from damage. the

Buckling-resistant bracing members, as lateral-force energy-dissipating devices used in multi-story and high-rise structures, dissipate energy through the elastic-plastic properties of steel, and produce large residual deformations after major earthquakes. Excessive lateral deformation and residual deformation of structures caused by strong earthquakes are the direct cause of structural damage and collapse. In addition, traditional buckling-resistant braces also have many problems such as difficulty in controlling machining accuracy and heavy wet work workload caused by concrete peripheral restraint members. the

Most of the existing supports and the main structure are connected by shear bolts, which cannot give full play to the mechanical properties of the bolts. The number of bolts is large, the site construction is inconvenient, and the structural cost is high. the

In recent years, scholars at home and abroad have done little research on prestressed anti-buckling braces for steel structures, and have not really realized the industrialized rapid and integrated production of prestressed anti-buckling braces for steel structures. the

Contents of the invention

The purpose of the present invention is to overcome the existing above-mentioned defects, and provide a novel prestressed anti-buckling support of channel steel assembled steel structure, which can realize the rapid and reasonable installation of the main steel structure and supporting components. And it has a strong bearing capacity under small earthquakes. By increasing its initial tensile bearing capacity, it reduces or even eliminates its residual deformation under large earthquakes, and has a strong energy dissipation capacity. the

In order to achieve the above object, the present invention adopts following technical scheme:

The prestressed anti-buckling bracing of channel steel assembled steel structure includes three parts: internal energy dissipation chips, peripheral frame restraint members, and prestressed cables. the

It is characterized in that: the internal energy-dissipating chip is a straight single-piece steel plate. In order to make the energy dissipation chip easy to enter into the plastic energy dissipation, the middle part of the chip board is weakened and has an arc shape. The end of the energy-consuming chip is connected side by side with two vertical connection boards: an upper connection board and a lower connection board. The upper connecting plate has bolt holes, and is connected with the frame by bolts. There is a cavity with the same size as the cross-sectional size of the energy dissipation chip in the surface of the lower connecting plate. Pass the energy dissipation chip through the lower connection board, press against the upper connection board, and solder the three together. The upper and lower connecting plates are welded together by the stiffeners of the upper and lower connecting plates. The stiffeners of the upper and lower connecting plates are perpendicular to both plates. Both ends of the energy-consuming chip have exactly the same structure directly. The number of stiffeners on the upper and lower connecting plates and the spacing are determined by calculation. the

The outer frame constraining member has an I-shaped cross section, two upper and lower flange plates, and two middle webs are channel steel. The channel steels of the webs are placed with their backs facing each other, and the width of an energy-dissipating chip is left between the webs of the two channel steels. The peripheral frame restraint members are arranged with transverse stiffeners along the entire length from the upper end. The spacing of transverse stiffeners is determined by calculation. The transverse stiffeners are welded to the web channel steel. The flange channel steel and the web channel steel flange are welded or bolted. the

The prestressed cables pass through the transverse stiffeners, and the two ends are connected with the lower connection plates at the two ends of the internal energy dissipation chips. The prestress size and the number of prestress cables are determined by calculation. the

In the factory, the internal energy dissipation chip, the peripheral frame restraint member and the prestressed cable are assembled and connected together. The prestressed anti-buckling support of the channel steel assembled steel structure is connected with the frame by bolts on site. When the horizontal force acts on the structure, the horizontal force component of the prestressed anti-buckling support of the channel steel assembled steel structure reduces or even offsets the horizontal force acting on the structure, so that the interstory displacement of the structure is a small value, which meets the specification requirements Require. the

Beneficial effect

The invention adopts a channel steel assembled steel structure prestressed anti-buckling support that can realize rapid assembly and effectively resist horizontal lateral displacement during the construction stage. This form of support can not only effectively realize the industrialization of the processing of steel structural components, but also greatly increase the construction speed and greatly reduce the amount of steel used. the

The prestressed anti-buckling support of the channel steel assembled steel structure is connected with the main structure by tension bolts, which can give full play to the mechanical properties of the bolts and reduce the structural cost. the

The prestressing technology is introduced into the steel structure support. Under the action of small earthquake, the prestressed anti-buckling support member has great lateral stiffness; under the action of moderate earthquake or large earthquake, the prestressed anti-buckling support member It can realize the full yield of the whole section without the overall or local buckling failure of the supporting member, and reduce or eliminate the residual deformation of the energy-dissipating chip, so that the original energy-dissipating mode through the plastic hinge at the beam end of the main structure can be changed to only in the anti-corrosion Concentrate energy dissipation on the buckling support components, thereby better protecting the main structure. the

The prestressed anti-buckling support member not only has a strong initial stiffness but also has a good energy dissipation effect. Through its own lateral resistance and energy dissipation, the cross-sectional size of the member can be reduced, and the structural cost can be reduced. the

Description of drawings

Fig. 1 side view of components of the present invention

Fig. 2 component plan view of the present invention

Fig. 3 internal energy consumption chip diagram of the components of the present invention

Fig. 4 external frame restraint component figure of the present invention

Among them, 1-channel-shaped assembled steel structure prestressed anti-buckling support; 2-internal energy dissipation chip; 3-external frame restraint member; 4-prestressed cable; 5-upper connecting plate; 6-lower connecting plate; 7 -Transverse stiffener; 8-Channel steel as the middle web; 9-Channel steel as the upper and lower flanges; 10-Stiffeners for the upper and lower connecting plates

Specific implementation method

The implementation of the structural system will be described in detail below in conjunction with the accompanying drawings. the

As shown in Fig. 1, the present invention is a prestressed anti-buckling brace of a channel steel assembled steel structure, which consists of three parts: an internal energy dissipation chip, a peripheral frame restraint member, and a prestressed cable. The internal energy-dissipating chip is inserted into the middle gap of the peripheral frame constraining member. The prestressed cables are symmetrically arranged on both sides of the energy dissipation chip, passing through the transverse stiffeners, and the number is determined by calculation. In order to dissipate energy through axial deformation of the internal energy-dissipating chip, the internal energy-dissipating chip is longer than the outer frame constraining member by a distance D, and the value of D is determined by calculation. the

As shown in Figure 2: the internal energy-dissipating chip is a straight single-piece steel plate. In order to make the energy dissipation chip easy to enter into the plastic energy dissipation, the middle part of the chip board is weakened and has an arc shape. The end of the energy-consuming chip is connected side by side with two vertical connection boards: an upper connection board and a lower connection board. The upper connecting plate has bolt holes, and is connected with the frame by high-strength bolts. There is a cavity with the same size as the cross-sectional size of the energy dissipation chip in the surface of the lower connecting plate. Pass the energy dissipation chip through the lower connection board, press against the upper connection board, and solder the three together. The upper and lower connecting plates are welded together by double rows of upper and lower connecting plate stiffeners. The stiffeners of the upper and lower connecting plates are perpendicular to both plates. Both ends of the energy-consuming chip have exactly the same structure directly. the

As shown in Figure 3: the section of the peripheral constraint frame is I-shaped, which is formed by splicing or welding four pieces of channel steel with bolts. The channel steel used as the upper and lower flanges, its web and the flange of the channel steel used as the middle web are opened at the opposite position of contact, connected together with bolts, or welded at the opposite position of the connection to form a peripheral constraint frame . The width of an energy-dissipating chip is left between the two webs of the channel steel in the middle web of the peripheral constraining frame, so that the internal energy-dissipating chip can be inserted. The peripheral frame restraint members are arranged with transverse stiffeners along the entire length from the upper end. The spacing of the transverse stiffeners is determined by calculation, and the transverse stiffeners are welded to the web and flange plates of the web channel steel. The bottom of the peripheral frame constraint member is welded to the lower connection plate. The upper and lower connecting plates are vertically welded with stiffeners of the upper and lower connecting plates, and the number and spacing of the stiffening ribs of the upper and lower connecting plates are determined by calculation. the

As shown in Figure 4: one end of the prestressed cable is connected to the lower connecting plate of the internal energy-dissipating chip, and the other end is connected to the transverse stiffener on the lowermost side of the outer frame constraint member. The number of prestressed cables is determined by calculation. the

Claims (4)

1. A prestressed anti-buckling brace of channel steel assembled steel structure, including internal energy dissipation chips (2), peripheral frame restraint members (3), and prestressed cables (4); internal energy dissipation chips (2) are inserted into the peripheral frame In the middle gap of the constraint member (3); transverse stiffeners (7) are arranged on both sides of the internal energy dissipation chip (2) along the length direction, and the prestressed cables (4) are symmetrically arranged on the inner energy dissipation chip (2) Both sides pass through the transverse stiffener (7); the internal energy dissipation chip (2) dissipates energy through axial deformation, and the length of the internal energy dissipation chip (2) is longer than the outer frame constraint member (3); the internal energy dissipation chip (2) The two ends of the frame protrude from the surrounding frame constraint member (3). the 2. A prestressed anti-buckling support for channel-assembled steel structures according to claim 1, characterized in that: the internal energy-dissipating chip (2) is a one-piece steel plate; the internal energy-dissipating The middle part of the chip (2) is weakened, and it is arc-shaped along the length direction; one end of the internal energy dissipation chip (2) is two connecting plates placed in parallel and perpendicular to the length direction of the internal energy dissipation chip (2): two parallel The upper connection board (5) of the energy consumption chip and the lower connection board (6) of the energy consumption chip are placed, and are welded and connected vertically along the length direction of the energy consumption chip; Bolt holes, the bolt holes are used to connect the anti-buckling support and the frame through bolts; the upper connecting plate (5) and the lower connecting plate (6) are welded together by the upper and lower connecting plate stiffeners (6); The stiffeners (6) of the upper and lower connecting plates are perpendicular to the two plates; the two ends of the internal energy dissipation chip (2) have exactly the same structure directly. the 3. The prestressed anti-buckling brace of a channel-assembled steel structure according to claim 1, characterized in that: the cross-section of the peripheral frame restraint member (3) is I-shaped, and is four bolts for channel steel Spliced or welded; the channel steel (9) web as the upper and lower flanges and the channel steel (8) flange as the middle web are opened at the opposite positions in contact and connected together with bolts, or The relative position of the connection is welded to form a peripheral constrained frame member (3); the width of an internal energy dissipation chip (2) is left between the two webs of the channel steel (8) used as the middle web of the peripheral constrained frame member (3) , the internal energy-dissipating chip (2) can be inserted; the peripheral frame restraint member (3) arranges transverse stiffeners (7) along the entire length; the transverse stiffeners (7) and the web of the channel steel (8) as the middle web and flange plates are welded; the bottom of the peripheral frame restraint member (3) is welded to the lower connecting plate (6); the upper and lower connecting plates (10) are used between the upper connecting plate (5) and the lower connecting plate (6) Vertical solder connection. the 4. A prestressed anti-buckling brace of a channel steel assembled steel structure according to claim 1, characterized in that: one end of the prestressed cable (4) is connected to the lower connecting plate at one end of the internal energy dissipation chip (2) (6 ), and the other end is connected to the outermost transverse stiffener (7) of the peripheral frame constraining member (3) at the other end of the internal energy dissipation chip (2). the

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