CN108005251B - Assembled corner support bearing energy dissipation support and construction method thereof - Google Patents
Assembled corner support bearing energy dissipation support and construction method thereof Download PDFInfo
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- CN108005251B CN108005251B CN201810078981.XA CN201810078981A CN108005251B CN 108005251 B CN108005251 B CN 108005251B CN 201810078981 A CN201810078981 A CN 201810078981A CN 108005251 B CN108005251 B CN 108005251B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/027—Preventive constructional measures against earthquake damage in existing buildings
Abstract
The utility model provides an assembled corner brace bears power consumption and supports and construction method thereof, bear power consumption and support and include power consumption and support connection steel assembly board, power consumption strip steel sheet and face external restraint steel sheet cover, power consumption support connection steel assembly includes diaphragm and division board, the upper end and the horizontal part of power consumption strip steel sheet are fixed, the lower extreme and the vertical part of power consumption strip steel sheet are fixed, the middle part of face external restraint steel sheet cover is provided with the cavity space, power consumption strip steel sheet inserts in this cavity space, face external restraint steel sheet cover and power consumption support connection steel assembly remain the power consumption displacement clearance. The invention consumes energy on one hand and prevents the beam from falling off on the other hand, and when the prestress rib in the beam fails, the shearing force transmitted from the beam can be borne by the shearing support plate, so that a second defense line is provided for the structure. One support or a plurality of supports can be used at one beam column node, and the plurality of supports can be regarded as a parallel system when working together. The support is convenient and rapid to replace after earthquake, and good post-earthquake recoverability is provided.
Description
Technical Field
The invention belongs to the technical field of structural engineering damping, and particularly relates to a damping device for dissipating vibration energy by utilizing metal yielding and a construction method thereof.
Background
With the development of the age, people pay more and more attention to earthquakes. The method of designing the shock absorbing structure has been rapidly developed in recent years. The structure often employs mechanical means to dissipate the energy introduced by the seismic action so that the primary load bearing members are not unacceptably damaged. Damping devices used in the current structure can be mainly divided into passive control, semi-active control, active control and hybrid control. The passive control technology is widely applied to engineering construction or is used for improving the earthquake resistance or wind resistance of the existing old buildings due to simple and reliable structure, stable energy consumption performance, low price and convenient maintenance. The passive energy-dissipation and shock-absorption technology of the structure refers to that energy-dissipation devices, such as dampers, are arranged at certain positions of the structure, and energy in the earthquake input structure is dissipated or absorbed through friction, bending and elastoplastic hysteresis deformation generated by the energy-dissipation devices, so that earthquake reaction of the main structure is reduced, and therefore main structural members of the structure are prevented from being damaged, the structure is prevented from collapsing, and the purpose of shock absorption control is achieved. The passive energy consumption damping device adopted in the current structural system mainly comprises: viscous dampers, metal dampers, viscoelastic dampers, and friction dampers.
The metal damper is popular among people because of simple mechanical properties, convenient rigidity design, changeable finished product form and simple processing requirements, the extremely high initial rigidity ensures that the structure has enough rigidity to limit the deformation of the structure under the action of small shock and wind load, and the smaller yield displacement ensures that the metal damper can be well popularized in cast-in-situ or precast reinforced concrete structures. In the last century, china has carried out an assembled structure, and the beams and columns of the structure are connected by prestress tendons. However, the prestress rib assembled structure has low energy consumption capability under the action of earthquake, only small earthquake energy can be consumed through the deformation of the structure, and the structure has low capability of bearing the earthquake without larger damage. Meanwhile, the plastic hinge is easy to appear at the beam end under the action of earthquake due to the small contact surface, so that the concrete at the beam end is crushed prematurely, and the concrete is in danger of falling after being crushed, thereby causing economic loss and casualties. The adoption of the damper for anti-seismic reinforcement is an advanced idea, but the traditional damper is oversized, occupies building space and is particularly unfavorable for the reconstruction of old buildings.
Disclosure of Invention
The invention aims to provide an assembled corner brace bearing energy dissipation support and a construction method thereof, which aim to solve the technical problems that the existing metal damper is oversized, occupies a building space and is particularly unfavorable for the reconstruction of old buildings.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the assembled corner brace bearing energy dissipation brace is fixedly connected at the armpit of a connecting node of a structural column and a structural beam, and comprises an energy dissipation brace connecting steel component which is arranged along the width direction of the structural beam or the structural column in a centering way, wherein the energy dissipation brace connecting component comprises a transverse part and a vertical part, the transverse part is connected with the lower side surface of the structural beam, the vertical part is connected with the inner side surface of the structural column,
the fabricated corner brace bearing energy dissipation brace also comprises an energy dissipation strip steel plate and an out-of-plane constraint steel plate sleeve,
the energy dissipation strip steel plate is obliquely arranged at the armpit of the connecting node and is perpendicular to the plane where the connecting node is located, the upper end face of the energy dissipation strip steel plate is fixedly connected to the lower side surface of the transverse part, the lower end of the energy dissipation strip steel plate is fixedly connected to the inner side surface of the vertical part,
the energy consumption strip steel plate is provided with energy consumption sections with two sides of which the sizes are relatively contracted inwards, the middle parts of the energy consumption sections are horizontally protruded outwards to form a limit bulge, the height of the limit bulge is smaller than the outer edge of the original size,
the middle part of the out-of-plane constraint steel plate sleeve is provided with a cavity space for accommodating the energy consumption strip steel plate along the oblique setting direction of the energy consumption strip steel plate, the energy consumption strip steel plate is inserted into the cavity space, the size of the cavity space is used for ensuring that gaps are reserved between four side surfaces of the energy consumption strip steel plate and four side surfaces of the cavity space,
the longitudinal side section of the out-of-plane constraint steel plate sleeve is trapezoid, the longitudinal dimension of the out-of-plane constraint steel plate sleeve is smaller than the longitudinal dimension of the energy dissipation strip steel plate, the bottom end face of the out-of-plane constraint steel plate sleeve is parallel to the vertical part, an energy dissipation displacement gap is reserved between the bottom end face and the vertical part, the top end face of the out-of-plane constraint steel plate sleeve is parallel to the transverse part, an energy dissipation displacement gap is reserved between the top end face and the transverse part,
the limiting device is characterized in that a limiter fixedly connected with the inner wall of the out-of-plane constraint steel plate sleeve is arranged at the position corresponding to the limiting protrusion in the cavity space, the limiter and the energy consumption strip steel plate are located on the same plane, the thickness of the limiter is equal to that of the cavity space, a concave part matched with the limiting protrusion is arranged on the side wall of the limiter, and the concave part is tightly propped against the limiting protrusion.
The energy dissipation support connection steel component comprises a shear steel plate and a support connection steel plate,
the shear steel plate comprises a shear transverse plate and a shear vertical plate, the upper side surface of the shear transverse plate is clung to the lower side surface of the structural beam, and the outer side end part of the shear transverse plate is fixedly connected with the structural beam through a shear steel plate structure connecting bolt; the outer side surface of the shearing-resistant vertical plate is clung to the inner side surface of the structural column, the bottom end part of the shearing-resistant vertical plate is fixedly connected with the structural column through a shearing-resistant steel plate structure connecting bolt,
the supporting connection steel plate comprises a connection transverse plate and a connection vertical plate, the upper side surface of the connection transverse plate is clung to the lower side surface of the shearing-resistant transverse plate, and the connection transverse plate is fixedly connected with the shearing-resistant transverse plate through a connecting bolt between plates; the outer side surface of the connecting vertical plate is clung to the inner side surface of the shearing-resistant vertical plate, the connecting vertical plate is fixedly connected with the shearing-resistant vertical plate through a connecting bolt between the plates,
the transverse part consists of a shearing-resistant transverse plate and a connecting transverse plate, and the vertical part consists of a shearing-resistant vertical plate and a connecting vertical plate.
And two end surfaces of the energy consumption strip steel plate are welded with the connecting transverse plate and the connecting vertical plate respectively.
The shear steel plate is two straight-line plates or integrally formed angle plates, the support connecting steel plates are two straight-line plates, the inter-plate connecting bolts are uniformly distributed on the support connecting steel plates, and the shear steel plate structure connecting bolts are distributed on two longitudinal edges of the shear steel plate and two sides of the inter-plate connecting bolts.
The out-of-plane constraint steel plate sleeve is formed by buckling a lower constraint groove plate and an upper constraint cover plate which are matched for use, a cavity space is formed between the lower constraint groove plate and the upper constraint cover plate, the lower constraint groove plate comprises a groove side plate and a groove bottom plate, two edge parts of the upper constraint cover plate are fixedly connected with the groove side plate through constraint plate connecting bolts, the lower constraint groove plate and the upper constraint cover plate are oppositely clamped at two sides of the energy consumption strip steel plate,
the upper end face and the lower end face of the lower constraint groove plate are lower constraint groove plate inclined end faces, the upper end face and the lower end face of the upper constraint cover plate are upper constraint cover plate inclined end faces, and the lower constraint groove plate inclined end faces on the same side are flush with the upper constraint cover plate inclined end faces.
The groove side plate is characterized in that groove side plate inner side wall positioning screws are arranged on the inner side wall of the groove side plate, groove bottom plate upper side positioning screws are arranged on the upper side of the groove bottom plate, cover plate lower side positioning screws are arranged on the lower side of the upper constraint cover plate, the groove side plate inner side wall positioning screws, the groove bottom plate upper side positioning screws and the cover plate lower side positioning screws are respectively propped against the two longitudinal sides, the lower side and the upper side of the energy consumption strip steel plate, and therefore the energy consumption strip steel plate is guaranteed to reserve a gap for deformation of the energy consumption strip steel plate at the geometric center of the cavity space.
The stopper is strip integrated into one piece's steel slab, including two spacing fender protruding of one side outside of main part and main part, form the concave part between two spacing fender protruding, the tip that is located two main parts of spacing fender protruding outsides is respectively through stopper connecting bolt and groove side wall fixed connection of assisting the board.
The energy consumption strip steel plate is integrally in dog-bone shape, is in transverse and longitudinal bilateral axisymmetry, is obliquely arranged at the armpit of a connecting node at 45 degrees, and comprises an energy consumption section in the middle, elastic connecting sections at two ends, a constraint transition section with the size of concave arc smooth transition for connecting the energy consumption section and the elastic connecting sections from small to large, and a limit bulge protruding outwards from the middle of the energy consumption section.
The ultimate displacement of the fabricated corner support bearing energy dissipation support is not greater than the allowable maximum displacement of the energy dissipation displacement gap.
The construction method of the assembled corner support bearing energy dissipation support comprises the following construction steps:
step one, designing the size of an assembled corner brace bearing energy dissipation support to be arranged at the armpit of a connecting node according to calculation;
step two, processing the energy consumption support connection steel component, the energy consumption strip steel plate, the out-of-plane constraint steel plate sleeve and the limiter in a factory;
step three, assembling the limiter into the out-of-plane constraint steel plate sleeve, also loading the energy consumption strip steel plate into the out-of-plane constraint steel plate sleeve, inserting the energy consumption strip steel plate into the cavity space, installing the concave part and the limiting bulge in alignment, and then assembling the out-of-plane constraint steel plate sleeve to enable the energy consumption strip steel plate to be sleeved outside the energy consumption strip steel plate;
welding the top end surface of the energy consumption strip steel plate with the lower side of the transverse part, welding the bottom end surface of the energy consumption strip steel plate with the inner side of the vertical part, and respectively exposing energy consumption displacement gaps from top to bottom by the out-of-plane constraint steel plate sleeve and the energy consumption support connection steel assembly;
step five, conveying the fabricated corner brace bearing energy consumption support to a construction site;
and step six, fixedly connecting the transverse part to the bottom of the structural beam, and fixedly connecting the vertical part to the inner side part of the structural column.
In the third step, the out-of-plane constraint steel plate sleeve comprises a lower constraint groove plate (2) and an upper constraint cover plate (3) which are connected, a limiter is fixedly connected with the lower constraint groove plate through a limiter connecting bolt, then an energy consumption strip steel plate is placed in the lower constraint groove steel plate, a limiting bulge is inserted into a concave part, then the upper constraint cover plate is covered, and finally the lower constraint groove plate and the upper constraint cover plate are screwed and fixed through the constraint plate connecting bolt.
Compared with the prior art, the invention has the following characteristics and beneficial effects:
the invention discloses an assembled corner brace bearing energy consumption support, which utilizes the bearing capacity to bear vertical shearing force on one hand to form a second defense line for bearing vertical load; on the other hand, when the earthquake comes, the support enters an energy consumption state, and a large amount of earthquake energy can be dissipated, so that the structure earthquake response has a good control effect. Meanwhile, in order to avoid interference to building space, the device is additionally arranged at the armpit between the beams and the columns, so that an effective plastic hinge area with full energy consumption is formed, the calculation can be performed by adopting the existing design specification and design software when the structural design is performed, and the popularization is convenient. According to the invention, the earthquake energy of the building structure is consumed through the energy consumption support, the earthquake stress borne by the main structure is reduced, the damage of the whole structure is avoided, meanwhile, the damage of the concrete member of the main structure is reduced, the whole earthquake resistance of the structure is improved, the earthquake resistance can be conveniently replaced after earthquake, and even after small earthquake, the support does not enter plasticity and can be replaced, so that the building structure can quickly recover the function after earthquake, and the economic loss is reduced.
The energy-consuming brace adopts a metal structure, has simple mechanical characteristics, convenient design, changeable finished product form and simpler processing requirement, and extremely high initial rigidity ensures that the structure has enough rigidity to limit the deformation of the structure under the action of small shock and wind load, and smaller yield displacement ensures that the structure can be well popularized in cast-in-situ or prefabricated reinforced concrete structures. The device is small in size, light in weight and convenient to construct. The device is also suitable for earthquake-proof reinforcement of the prestress assembly type structural system.
The invention can be designed and installed in a structure as a building component; but also for seismic reinforcement of already built structures. The device utilizes beam-end corner, makes the power consumption support take place deformation, and the power consumption board produces the counter-force opposite with the direction of motion, carries out the power consumption, and then reduces the displacement of structure under the seismic action, reduces the damage of structure. A steel plate is additionally arranged on the outer side of the energy consumption plate to be used as out-of-plane constraint, so that the energy consumption plate can still stably consume energy when being pressed.
The elastic connecting section of the energy-dissipating strip steel plate is wider in section and slightly higher in rigidity, so that the energy-dissipating strip steel plate is reliably connected with the energy-dissipating support connecting steel component, and the energy-dissipating section is an energy-dissipating main body of the energy-dissipating support. The middle part of the energy consumption strip steel plate is also provided with a limiting bulge, a limiter is propped on the outer side of the limiting bulge, the limiting bulge is clamped by the limiter when the energy consumption support is deformed greatly, the energy consumption strip steel plate is divided into two sections by taking the limiting bulge as a boundary, and the energy consumption sections consume energy respectively at two sides of the limiting bulge.
The out-of-plane constraint steel plate sleeve is designed into the groove side plate and the groove bottom plate to facilitate the installation of the limiter, and the out-of-plane constraint steel plate sleeve is internally provided with the set screw to ensure the installation position of the energy consumption strip steel plate. The energy-consumption supporting connection steel component for the energy consumption of the invention provides connection of energy-consumption strip steel plates on one hand and shear bearing capacity of the beam on the other hand, and can bear shearing force transmitted from the beam when the prestressed tendons in the beam fail, thereby providing a second defense line for the structure. Because of the adoption of the fully assembled structure, the support is convenient and rapid to replace after earthquake, and good after-earthquake recoverability is provided.
The ultimate displacement of the support of the present invention should not exceed the allowable maximum displacement of the dissipative displacement gap, and the stiffness of all supports used in a layer of a building can be considered as a parallel version of the stiffness of a single support. The support is in elasticity during small earthquake, and only provides the elastic mechanical properties of the support beam and the beam column joint. During medium and large earthquakes, the support should deform and enter yield to consume energy, so as to protect the main structure.
The invention is suitable for an assembled prestress structure, can conveniently strengthen and reform the original structure, and needs to calculate the length, the number and the size of the anchor bolts required by the anchor holes to bear the required shearing force.
Drawings
The invention is described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of a shear steel plate.
FIG. 3 is a schematic view of the structure of section A-A in FIG. 2.
Fig. 4 is a schematic view of the structure of the section B-B in fig. 2.
Fig. 5 is a schematic view of a partial side cross-section of an outer face constraint steel plate sleeve at the armpit of a connection node, the side cross-section being located at a void.
FIG. 6 is a schematic side sectional view of an out-of-plane constraining steel sheath at the underarm of a connecting node, the side sectional position being at the ledge.
Fig. 7 is a schematic view of the structure of the section D-D in fig. 5.
Fig. 8 is a schematic view of the structure of the section E-E in fig. 5.
Fig. 9 is a schematic structural view of the steel plate of fig. 5 or 6 to which only the energy dissipating strip is connected.
FIG. 10 is a schematic view of the F-F longitudinal section of the energy dissipating strip steel sheet of FIG. 9.
Fig. 11 is a schematic structural view of the section C-C in fig. 1, namely, a schematic structural view of the energy dissipating strip steel plate and the out-of-plane constraint steel plate sleeve.
Fig. 12 is a schematic top view of the lower restraint channel panel.
Fig. 13 is a schematic view of the bottom structure of the upper constraining trough plate.
Fig. 14 is a schematic view of the G-G cross-sectional structure of fig. 12.
Fig. 15 is a schematic structural view of the stopper.
Fig. 16 is a schematic side view of fig. 15.
Fig. 17 is a schematic view of the structure of the assembled stopper of fig. 14.
Fig. 18 is a schematic top view of the assembled stopper and energy dissipating strap steel of fig. 12.
Reference numerals: 1-energy consumption strip steel plates, 11-elastic connecting sections, 12-constraint transition sections, 13-energy consumption sections, 14-limit protrusions, 2-lower constraint groove plates, 21-groove side plates, 22-groove bottom plates, 3-upper constraint cover plates, 4-cavity spaces, 5-support connecting steel plates, 51-connecting transverse plates, 52-connecting vertical plates, 6-inter-plate connecting bolts, 7-energy consumption displacement gaps, 8-shearing resistant steel plates, 81-shearing resistant transverse plates, 82-shearing resistant vertical plates, 9-shearing resistant steel plate structure connecting bolts, 10-structural columns, 15-structural beams, 16-groove side wall positioning screws, 17-constraint plate connecting bolts, 18-limiter connecting bolts, 19-groove bottom plate upper side positioning screws, 20-lower constraint groove plate inclined end faces, 23-limiters, 231-main bodies, 232-limit stop protrusions, 233-concave parts, 24-upper constraint cover plate inclined end faces, 25-prestressing tendons, 26-inter-plate connecting first bolt holes, 27-inter-plate connecting second bolt holes and 28-cover plate lower side positioning screws.
Detailed Description
Referring to fig. 1, an embodiment of the present invention is shown, in which a beam-column connection structure is provided, in which a beam-column is connected by a tendon 25, and an assembled corner brace is used to carry an energy dissipation brace, and the assembled corner brace is fixedly connected to an underarm of a connection node between a structural column 10 and a structural beam 15, and includes an energy dissipation brace connection steel assembly centrally disposed along a width direction of the structural beam 15 or the structural column 10, and the energy dissipation brace connection assembly includes a transverse portion and a vertical portion, where the transverse portion is connected to an underside surface of the structural beam 15, and the vertical portion is connected to an inner side surface of the structural column 10.
Referring to fig. 1, the dissipative brace connection steel assembly includes a shear steel plate 8 and a brace connection steel plate 5.
Referring to fig. 1-4, the shear steel plate 8 comprises a shear transverse plate 81 and a shear vertical plate 82, the upper side surface of the shear transverse plate 81 is clung to the lower side surface of the structural beam 15, and the outer side end part of the shear transverse plate 81 is fixedly connected with the structural beam 15 through a shear steel plate structure connecting bolt 9; the outer side surface of the shearing resistant vertical plate 82 is clung to the inner side surface of the structural column 10, and the bottom end part of the shearing resistant vertical plate 82 is fixedly connected with the structural column 10 through the shearing resistant steel plate structure connecting bolt 9.
Referring to fig. 1-9, the supporting connection steel plate 5 comprises a connection transverse plate 51 and a connection vertical plate 52, the upper side surface of the connection transverse plate 51 is clung to the lower side surface of the shearing resistant transverse plate 81, and the connection transverse plate 51 is fixedly connected with the shearing resistant transverse plate 81 through an inter-plate connection bolt 6; the outer side surface of the connecting riser 52 is clung to the inner side surface of the shearing resistant riser 82, and the connecting riser 52 is fixedly connected with the shearing resistant riser 82 through the inter-plate connecting bolt 6. The shear cross plate 81 and the shear vertical plate 82 are respectively provided with an inter-plate connection first bolt hole 26 for the inter-plate connection bolt 6 to pass through, and the connection cross plate 51 and the connection vertical plate 52 are respectively provided with an inter-plate connection second bolt hole 27 for the inter-plate connection bolt 6 to pass through.
The transverse portion is composed of a shear transverse plate 81 and a connecting transverse plate 51, and the vertical portion is composed of a shear vertical plate 82 and a connecting vertical plate 52.
Referring to fig. 2-4, the shear steel plate 8 is two rectangular plates or integrally formed corner plates, and in this embodiment, the shear steel plate 8 may be an integrally formed corner plate, or two rectangular plates may be adopted according to practical situations. Compared with the prior art, the angle plate can be used as a support, and the function of supporting the beam end is continuously generated when the beam end is damaged.
Referring to fig. 1 and 5-9, the supporting connection steel plates 5 are two straight plates, the inter-plate connection bolts 6 are uniformly distributed on the supporting connection steel plates, and the shearing steel plate structure connection bolts 9 are distributed on two longitudinal edges of the shearing steel plates 8 and on two sides of the inter-plate connection bolts 6.
Referring to fig. 5-9, the fabricated corner brace load-bearing energy dissipating brace further includes an energy dissipating strap steel sheet 1 and an out-of-plane constraining steel sheet sleeve.
Referring to fig. 9, the energy dissipation strip steel plate 1 is obliquely arranged at the armpit of the connecting node and is perpendicular to the plane where the connecting node is located, the upper end face of the energy dissipation strip steel plate 1 is fixedly connected to the lower side surface of the transverse part, and the lower end of the energy dissipation strip steel plate 1 is fixedly connected to the inner side surface of the vertical part. The two end surfaces of the energy consumption strip steel plate 1 are welded with the connecting transverse plate 51 and the connecting vertical plate 52 respectively.
Referring to fig. 10, the energy dissipation strip steel plate 1 is integrally dog-bone-shaped and is axially symmetrical in both transverse and longitudinal directions, and has a rectangular cross section. The device is obliquely arranged at the armpit of the connecting node at 45 degrees and comprises an energy consumption section 13 with two sides of the middle part relatively shrinking in size, an elastic connecting section 11 at two ends, a constraint transition section 12 with the size of being changed from small to large and connecting the energy consumption section 13 with the elastic connecting section 11 in a concave arc smooth transition mode, and a limit bulge 14 with the middle part of the energy consumption section 13 protruding outwards horizontally. The height of the limit projection 14 is smaller than the outer edge of the elastic connection section 11.
Referring to fig. 11, the middle part of the out-of-plane constraint steel plate sleeve is provided with a cavity space 4 for accommodating the energy consumption strip steel plate along the oblique setting direction of the energy consumption strip steel plate 1, the energy consumption strip steel plate 1 is inserted into the cavity space 4, and the size of the cavity space 4 is determined by reserving gaps between four side surfaces of the energy consumption strip steel plate 1 and four side surfaces of the cavity space 4. According to the stress direction, the gaps on the upper side and the lower side are relatively narrow, and the gaps on the left side and the right side are relatively wide.
Referring to fig. 6, the longitudinal side section of the out-of-plane constraint steel plate sleeve is trapezoid, the longitudinal dimension of the out-of-plane constraint steel plate sleeve is smaller than that of the energy dissipation strip steel plate, the bottom end face of the out-of-plane constraint steel plate sleeve is parallel to the vertical part, an energy dissipation displacement gap 7 is reserved between the bottom end face and the vertical part, the top end face of the out-of-plane constraint steel plate sleeve is parallel to the transverse part, and an energy dissipation displacement gap 7 is reserved between the top end face and the transverse part. The ultimate displacement of the fabricated corner support bearing energy dissipation support is not greater than the allowable maximum displacement of the energy dissipation displacement gap. The maximum displacement, namely the rotation of the beam end when the frame structure is damaged, is allowed to generate deformation, and the setting size of the gap is based on the condition that the beam cannot touch the fabricated corner support bearing energy consumption support after deformation.
Referring to fig. 6 and 11, the out-of-plane constraint steel plate sleeve is formed by buckling a lower constraint groove plate 2 and an upper constraint cover plate 3 which are matched, a cavity space 4 is formed between the lower constraint groove plate 2 and the upper constraint cover plate 3, the lower constraint groove plate 2 comprises a groove side plate 21 and a groove bottom plate 22, two edge parts of the upper constraint cover plate 3 and the groove side plate 21 are fixedly connected through constraint plate connecting bolts 17, and the lower constraint groove plate 2 and the upper constraint cover plate 3 are oppositely clamped on two sides of the energy consumption strip steel plate 1.
Referring to fig. 11-12, the upper and lower end surfaces of the lower constraint groove plate 2 are lower constraint groove plate inclined end surfaces 20. Referring to fig. 13, the upper and lower end surfaces of the upper constraint cover plate 3 are upper constraint cover plate inclined end surfaces 24, and the lower constraint groove plate inclined end surfaces 20 on the same side are flush with the upper constraint cover plate inclined end surfaces 24.
Referring to fig. 12 and 14, the inner side wall of the side plate 21 is provided with a side plate inner side wall set screw 16, and the upper side of the bottom plate 22 is provided with a bottom plate upper side set screw 19; referring to fig. 13, the lower side of the upper constraint cover plate 3 is provided with a cover plate lower side set screw 28, and the set screws 16 on the inner side wall of the ledge plate, the set screws 19 on the upper side of the ledge plate and the set screws 28 on the lower side of the cover plate are respectively propped against the two longitudinal sides, the lower side and the upper side of the energy consumption strip steel plate 1, so as to ensure that the energy consumption strip steel plate 1 reserves a gap for deformation of the energy consumption strip steel plate at the geometric center of the cavity space 4.
All the set screws are arranged according to the shape of the energy dissipation strip steel plate. For example, four inner side wall positioning screws 16 are arranged in total, and two of the inner side wall positioning screws are positioned on two sides of the elastic connecting section for limiting in the horizontal direction. Six positioning screws 19 are arranged on the upper side of the groove bottom plate, two elastic connecting sections are arranged on the back of each elastic connecting section, two energy consumption sections are arranged on the back of each elastic connecting section, and vertical limiting of the back of the energy consumption strip steel plate is carried out. Four positioning screws are arranged on the lower side of the cover plate, two elastic connecting sections are arranged on the upper portion of each elastic connecting section, and vertical limiting of the upper portion of the energy consumption strip steel plate is conducted.
Referring to fig. 15-16, the limiter 23 is a strip-shaped integrally formed flat steel block, and includes a main body 231 and two limiting stop protrusions 232 protruding outwards from one side of the main body 231, a concave portion 233 is formed between the two limiting stop protrusions 232, and as shown in fig. 17, the ends of the two main bodies 231 located outside the limiting stop protrusions 232 are fixedly connected with the side walls of the groove side plates 21 through limiter connecting bolts 18 respectively.
Referring to fig. 17-18, a limiter 23 fixedly connected with the inner wall of the out-of-plane constraint steel plate sleeve is arranged in the cavity space 4 and corresponds to the limiting protrusion 14, the limiter 23 and the energy dissipation strip steel plate 1 are located in the same plane, the thickness of the limiter 23 is equal to that of the cavity space 4, a concave portion 233 which is suitable for the limiting protrusion 14 is arranged on the side wall of the limiter 23, and the concave portion 233 is tightly propped against the limiting protrusion.
The construction method of the fabricated corner support bearing energy dissipation support comprises the following construction steps:
step one, designing the size of the assembled corner brace bearing energy dissipation support to be arranged at the armpit of the connecting node according to calculation.
And step two, processing the energy dissipation support connection steel assembly, the energy dissipation strip steel plate 1, the out-of-plane constraint steel plate sleeve and the limiter 23 in a factory.
Step three, the limiter 23 is assembled into the out-of-plane constraint steel plate sleeve, the energy consumption strip steel plate 1 is also assembled into the out-of-plane constraint steel plate sleeve and inserted into the cavity space 4, the concave part 233 is aligned with the limiting protrusion 14, and then the out-of-plane constraint steel plate sleeve is assembled so as to be sleeved outside the energy consumption strip steel plate 1.
And fourthly, welding the top end surface of the energy dissipation strip steel plate 1 with the lower side of the transverse part, welding the bottom end surface of the energy dissipation strip steel plate 1 with the inner side of the vertical part, and respectively exposing the energy dissipation displacement gap 7 from top to bottom by the out-of-plane constraint steel plate sleeve and the energy dissipation support connection steel assembly.
And fifthly, conveying the manufactured fabricated corner brace bearing energy dissipation support to a construction site.
Step six, the transverse part is fixedly connected to the bottom of the structural beam 15, and the vertical part is fixedly connected to the inner side part of the structural column 10.
In the third step, the out-of-plane constraint steel plate sleeve comprises a lower constraint groove plate 2 and an upper constraint cover plate 3 which are connected, a limiter is fixedly connected with the lower constraint groove plate 2 through a limiter connecting bolt, then an energy consumption strip steel plate is placed into the lower constraint groove steel plate 2, a limiting protrusion 14 is inserted into a concave part 233, then the upper constraint cover plate 3 is covered, and finally the lower constraint groove plate 2 and the upper constraint cover plate 3 are screwed and fixed through a constraint plate connecting bolt 17.
Claims (5)
1. The utility model provides an assembled knee brace bears energy dissipation brace, fixed connection is in the connected node armpit department of structural column (10) and structure roof beam (15), its characterized in that: comprises an energy consumption support connecting steel component which is arranged along the width direction of a structural beam (15) or a structural column (10) in a centering way, wherein the energy consumption support connecting component comprises a transverse part and a vertical part, the transverse part is connected with the lower side surface of the structural beam (15), the vertical part is connected with the inner side surface of the structural column (10),
the assembled corner brace bearing energy dissipation brace also comprises an energy dissipation strip steel plate (1) and an out-of-plane constraint steel plate sleeve,
the energy consumption strip steel plate (1) is obliquely arranged at the armpit of the connecting node and is perpendicular to the plane where the connecting node is located, the upper end face of the energy consumption strip steel plate (1) is fixedly connected to the lower side surface of the transverse part, the lower end of the energy consumption strip steel plate (1) is fixedly connected to the inner side surface of the vertical part,
the energy consumption strip steel plate (1) is provided with energy consumption sections (13) with two sides of which the sizes are relatively contracted, the middle parts of the energy consumption sections (13) are horizontally and externally protruded to form a limit bulge (14), the height of the limit bulge (14) is smaller than the outer edge of the original size,
the middle part of the out-of-plane constraint steel plate sleeve is provided with a cavity space (4) for accommodating the energy consumption strip steel plate along the oblique setting direction of the energy consumption strip steel plate (1), the energy consumption strip steel plate (1) is inserted into the cavity space (4), the size of the cavity space (4) is in order to ensure that gaps are reserved between four side surfaces of the energy consumption strip steel plate (1) and four side surfaces of the cavity space (4),
the longitudinal side section of the out-of-plane constraint steel plate sleeve is trapezoid, the longitudinal dimension of the out-of-plane constraint steel plate sleeve is smaller than the longitudinal dimension of the energy dissipation strip steel plate, the bottom end face of the out-of-plane constraint steel plate sleeve is parallel to the vertical part, an energy dissipation displacement gap (7) is reserved between the bottom end face and the vertical part, the top end face of the out-of-plane constraint steel plate sleeve is parallel to the horizontal part, an energy dissipation displacement gap (7) is reserved between the top end face and the horizontal part,
a limiter (23) fixedly connected with the inner wall of the out-of-plane constraint steel plate sleeve is arranged in the cavity space (4) and corresponds to the limiting bulge (14), the limiter (23) and the energy consumption strip steel plate (1) are positioned in the same plane, the thickness of the limiter (23) is equal to that of the cavity space (4), a concave part (233) which is suitable for the limiting bulge (14) is arranged on the side wall of the limiter (23), and the concave part (233) is tightly propped against the limiting bulge;
the energy consumption support connection steel component comprises a shear steel plate (8) and a support connection steel plate (5),
the shear steel plate (8) comprises a shear transverse plate (81) and a shear vertical plate (82), the upper side surface of the shear transverse plate (81) is clung to the lower side surface of the structural beam (15), and the outer side end part of the shear transverse plate (81) is fixedly connected with the structural beam (15) through a shear steel plate structure connecting bolt (9); the outer side surface of the shearing resistant vertical plate (82) is tightly attached to the inner side surface of the structural column (10), the bottom end part of the shearing resistant vertical plate (82) is fixedly connected with the structural column (10) through a shearing resistant steel plate structure connecting bolt (9),
the supporting connection steel plate (5) comprises a connection transverse plate (51) and a connection vertical plate (52), the upper side surface of the connection transverse plate (51) is clung to the lower side surface of the shearing-resistant transverse plate (81), and the connection transverse plate (51) is fixedly connected with the shearing-resistant transverse plate (81) through an inter-plate connection bolt (6); the outer side surface of the connecting vertical plate (52) is tightly attached to the inner side surface of the shearing resistant vertical plate (82), the connecting vertical plate (52) is fixedly connected with the shearing resistant vertical plate (82) through the connecting bolt (6) between the plates,
two end faces of the energy consumption strip steel plate (1) are respectively welded with a connecting transverse plate (51) and a connecting vertical plate (52),
the transverse part consists of a shearing-resistant transverse plate (81) and a connecting transverse plate (51), and the vertical part consists of a shearing-resistant vertical plate (82) and a connecting vertical plate (52);
the shearing resistant steel plate (8) is an integrally formed angle plate,
the support connecting steel plates (5) are two straight plates, the inter-plate connecting bolts (6) are uniformly distributed on the support connecting steel plates, and the shear steel plate structure connecting bolts (9) are distributed on two longitudinal edge parts of the shear steel plates (8) and on two sides of the inter-plate connecting bolts (6);
the out-of-plane constraint steel plate sleeve is formed by buckling a lower constraint groove plate (2) and an upper constraint cover plate (3) which are matched for use, a cavity space (4) is formed between the lower constraint groove plate (2) and the upper constraint cover plate (3), the lower constraint groove plate (2) comprises a groove side plate (21) and a groove bottom plate (22), two edge parts of the upper constraint cover plate (3) are fixedly connected with the groove side plate (21) through constraint plate connecting bolts (17), the lower constraint groove plate (2) and the upper constraint cover plate (3) are oppositely clamped on two sides of the energy consumption strip steel plate (1),
the upper end face and the lower end face of the lower constraint groove plate (2) are lower constraint groove plate inclined end faces (20), the upper end face and the lower end face of the upper constraint cover plate (3) are upper constraint cover plate inclined end faces (24), and the lower constraint groove plate inclined end faces (20) and the upper constraint cover plate inclined end faces (24) on the same side are flush;
the upper side of the tank bottom plate (22) is provided with a tank bottom plate upper side set screw (19), the lower side of the upper constraint cover plate (3) is provided with a cover plate lower side set screw (28), the tank side plate inner side wall set screw (16), the tank bottom plate upper side set screw (19) and the cover plate lower side set screw (28) are respectively propped against the two longitudinal sides, the lower side and the upper side of the energy consumption strip steel plate (1) so as to ensure that the energy consumption strip steel plate (1) reserves a gap for deformation of the energy consumption strip steel plate at the geometric center of the cavity space (4);
the limiter (23) is a strip-shaped integrally formed steel flat block and comprises a main body (231) and two limiting stop protrusions (232) protruding outwards from one side of the main body (231), a concave part (233) is formed between the two limiting stop protrusions (232), and the end parts of the two main bodies (231) positioned outside the limiting stop protrusions (232) are fixedly connected with the side wall of the ledge plate (21) through limiter connecting bolts (18) respectively;
the energy consumption strip steel plate (1) comprises an energy consumption section (13) at the middle part, elastic connecting sections (11) at two ends, a constraint transition section (12) with the size of concave arc smooth transition from small to large for connecting the energy consumption section (13) and the elastic connecting sections (11), and a limit bulge (14) protruding outwards at the middle part of the energy consumption section (13).
2. The fabricated corner brace load-bearing energy dissipating brace of claim 1, wherein: the whole energy dissipation strip steel plate (1) is dog-bone-shaped and is in transverse and longitudinal bilateral axisymmetry, and is obliquely arranged at the armpit of the connecting node at 45 degrees.
3. The fabricated corner brace load-bearing energy dissipating brace of claim 1, wherein: the ultimate displacement of the fabricated corner support bearing energy dissipation support is not greater than the allowable maximum displacement of the energy dissipation displacement gap.
4. A method of constructing an assembled corner brace load-bearing energy dissipating brace according to any of claims 1-3, comprising the steps of:
step one, designing the size of an assembled corner brace bearing energy dissipation support to be arranged at the armpit of a connecting node according to calculation;
step two, processing the energy consumption support connection steel component, the energy consumption strip steel plate (1), the out-of-plane constraint steel plate sleeve and the limiter (23) in a factory;
step three, assembling the limiter (23) and the energy consumption strip steel plate (1) into an out-of-plane constraint steel plate sleeve, wherein the concave part (233) is aligned with the limiting bulge (14);
welding the top end surface of the energy consumption strip steel plate (1) with the lower side of the transverse part, welding the bottom end surface of the energy consumption strip steel plate (1) with the inner side of the vertical part, and respectively exposing energy consumption displacement gaps (7) from top to bottom of the out-of-plane constraint steel plate sleeve and the energy consumption support connection steel assembly;
step five, conveying the fabricated corner brace bearing energy consumption support to a construction site;
and step six, fixedly connecting the transverse part to the bottom of the structural beam (15), and fixedly connecting the vertical part to the inner side part of the structural column (10).
5. The method of constructing fabricated corner brace load-bearing energy dissipating braces according to claim 4, wherein: in the third step, the out-of-plane constraint steel plate sleeve comprises a lower constraint groove plate (2) and an upper constraint cover plate (3) which are connected, a limiter is fixedly connected with the lower constraint groove plate (2) through a limiter connecting bolt, then an energy consumption strip steel plate is placed in the lower constraint groove plate (2), a limiting bulge (14) is inserted into a concave part (233), then the upper constraint cover plate (3) is covered, and finally the lower constraint groove plate (2) and the upper constraint cover plate (3) are screwed and fixed through a constraint plate connecting bolt (17).
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| CN108756409B (en) * | 2018-05-28 | 2020-01-10 | 昆明理工大学 | Anti-seismic structure for improving lateral movement rigidity and energy consumption of reinforced concrete frame |
| CN112922210B (en) * | 2021-01-27 | 2022-01-25 | 江苏海洋大学 | Connecting device for self-resetting anti-side frame and floor slab |
| CN116657770B (en) * | 2023-07-31 | 2023-12-05 | 中建安装集团有限公司 | Assembly building connecting device with damping function and application method thereof |
| CN116657759B (en) * | 2023-07-31 | 2023-12-12 | 中建安装集团有限公司 | Assembled building steel structure connecting member and use method thereof |
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