CN205654157U - Eccentric braced frame structure - Google Patents

Abstract

The utility model discloses an eccentrically supported frame structure. The eccentrically supported frame structure comprises a steel frame beam and a frame column. The lower part of the frame beam is provided with 1 to 2 support members supported on the bottom of the upper frame beam; The frame beam between the intersection point of the support member and the frame beam and the frame column, or the intersection point of the support member and the frame beam and the intersection point of another support member and the frame beam in the same span is an energy dissipation beam section, which is characterized in that , the energy-dissipating beam section is a lead core viscoelastic damper connected in series on the frame beam, and the two connecting end plates of the lead core viscoelastic damper are fixedly connected to the frame beam through high-strength bolts respectively, and make The composite viscoelastic layer of the lead core viscoelastic damper is perpendicular to the horizontal plane. The eccentrically supported frame structure of the utility model can effectively dissipate seismic energy during an earthquake, and can quickly and easily repair the energy-dissipating beam section damaged at the epicenter after the earthquake.

Description

An eccentrically braced frame structure

technical field

The utility model relates to a general building structure, in particular to a building structure including elongated bearing parts.

Background technique

The eccentrically braced frame structure is a common structural form in high-rise buildings in the world. According to Article 8.1.6, Clause 4 of the "Code for Seismic Design of Buildings" GB50011-2010, each support of the eccentrically braced frame should have at least one end connected to the frame beam, and should be connected between the intersection of the support and the beam and the column or within the same span. An energy-dissipating beam segment is formed between another support and the beam intersection. The eccentric bracing frame is based on setting a specific weak part in the steel frame. When the structure enters the elastic-plastic working stage, the weak part enters the energy consumption state before other components to ensure that the support will not fail due to buckling. Under the action of medium and small earthquakes, the structure is in the elastic working stage, and the eccentric support structure has a certain lateral stiffness to ensure that the interstory displacement of the structure meets the requirements of the code; The energy consumption of components yields and dissipates a part of the earthquake input energy, thereby reducing the damage to the overall structure, ensuring that the support will not buckle, and effectively prolonging the duration of the structure's seismic energy consumption.

Under the earthquake, the energy-dissipating beam section of the eccentrically braced frame mainly dissipates energy through the shear deformation of the web, and the residual deformation of the web is relatively large, so it needs to be repaired after the earthquake. If the energy-dissipating beam section is replaced as a whole, there will be a lot of waste, and the construction process is complicated and the construction period is long; moreover, there are usually a series of aftershocks after a major earthquake, and whether the energy-dissipating beam section is replaced in time after a major earthquake is related to safety of people's lives and property.

The energy-dissipating beam section of the eccentrically braced frame is prone to damage, because the force mechanism of the energy-dissipating beam section is relatively complex, and it bears the combined effects of tension, bending, and shearing at the same time, and has a large reciprocating plastic deformation during the earthquake, which makes it difficult to replace it after the earthquake. , repair inconvenience, and the cost is higher.

With the development and application of energy dissipation and shock absorption technology, many scholars at home and abroad have installed energy dissipation and shock absorption devices in eccentrically supported frames to replace traditional energy Deformation makes the shock absorbing device produce shear hysteretic deformation to dissipate the energy input by the earthquake into the main structure and protect the safety of the main structure. At present, the damping devices used by scholars at home and abroad are mainly metal shear dampers, but this type of damper is prone to instability and damage when subjected to the combined effects of tension, bending and shear at the same time. There is a certain security risk.

Contents of the invention

The technical problem to be solved by the utility model is to provide an eccentrically supported frame structure, which can effectively dissipate the seismic energy during an earthquake, and can quickly and easily repair the energy-dissipating beams damaged in the epicenter after the earthquake. segment to be repaired.

The technical scheme that the utility model solves the problems of the technologies described above is:

An eccentrically supported frame structure, the eccentrically supported frame structure includes a steel frame beam and a frame column, 1 to 2 support members supported on the bottom of the upper frame beam are arranged below the frame beam; the support member and the frame The frame beam between the intersection point of the beam and the frame column, or the intersection point between the supporting member and the frame beam and the intersection point between another supporting member and the frame beam in the same span is an energy-dissipating beam section, which is characterized in that,

The energy-dissipating beam section is a lead core viscoelastic damper connected in series on the frame beam, and the two connecting end plates of the lead core viscoelastic damper are respectively fixedly connected to the frame beam through high-strength bolts, and the lead The composite viscoelastic layer of the core viscoelastic damper is perpendicular to the horizontal plane.

The eccentric support frame structure described in the utility model, wherein, the number of lead cores of the lead core viscoelastic damper is an even number not less than 2, and is evenly distributed in the horizontal center of the composite viscoelastic layer of the lead core viscoelastic damper both sides of the line.

The utility model has the following beneficial effects:

(1) Since the lead core viscoelastic damper is used as the energy-dissipating beam section to dissipate energy, the main body of the structure has better ductility. Dissipate the energy in the structure, effectively control the deformation of the structure, reduce the lateral movement between layers and the overall structure, and ensure the safety of the main structure.

(2) The utility model utilizes the energy consumption of the shearing and extrusion deformation of the lead core of the viscoelastic damper and the energy consumption of the shear hysteretic deformation of the viscoelastic material at the same time, and the energy consumption efficiency is higher; and, due to the The lead-core viscoelastic damper has the same mechanical properties when subjected to tension-compression deformation and shear deformation, and can simultaneously withstand tensile, bending, and shear composite deformation within the limit of the load-bearing capacity without causing out-of-plane instability and stable performance.

(3) Since the lead core viscoelastic damper is connected to the main structure through high-strength bolts, it is easy to install in actual engineering, does not affect the function of the building, and is easy to repair and replace after the earthquake.

Description of drawings

Figures 1 to 2 are structural schematic diagrams of a specific embodiment of the eccentrically supported frame structure described in the present invention, wherein Figure 1 is a front view, and Figure 2 is an enlarged view of part I in Figure 1 .

Figures 3 to 5 are schematic structural views of the lead core viscoelastic damper in the embodiment shown in Figures 1 to 2, wherein Figure 3 is the main view, Figure 4 is the A-A sectional view of Figure 3, and Figure 5 is the part II in Figure 4 Zoom in on the graph.

6-7 are structural schematic diagrams of another specific embodiment of the eccentrically supported frame structure of the present invention, wherein FIG. 6 is a front view, and FIG. 7 is an enlarged view of part III in FIG. 6 .

detailed description

example 1

Referring to Figures 1 and 2, this example is a K-shaped eccentrically supported steel frame structure. The main body of the structure includes a frame beam 1 composed of H-shaped steel, a frame column 2 and two support members 3 in each span. The two supports The upper part of the component 3 is obliquely supported on the bottom of the upper frame beam 1 near the middle. The frame beam section between the two supporting members 3 and the intersection point of the upper frame beam 1 is disconnected, and a lead core viscoelastic damper 4 is provided at the disconnection as an energy dissipation beam section to connect the disconnected frame beam 1. two parts.

Referring to Figures 3 to 5, the lead core viscoelastic damper 4 includes three overlapping rectangular restraint steel plates 4-2 and two rectangular shear steel plates 4-3, any two adjacent restraint steel plates 4 A shearing steel plate 4-3 is interposed between -2, and a composite viscoelastic layer 4-4 is provided between each shearing steel plate 4-3 and its adjacent constraining steel plate 4-2; the composite viscoelastic layer 4 -4 is formed by vulcanization connection of 5 viscoelastic material layers 4-8 and 4 thin steel plates 4-9 overlapped in sequence; the two sides of the composite viscoelastic layer 4-4 are respectively adjacent to the constrained steel plates 4- 2 or 4-3 sheared steel plates are vulcanized and connected together. The lead core viscoelastic damper 4 also includes two connecting end plates 4-1 and four columnar lead cores 4-6; the restraining steel plate 4-2 and the shearing steel plate 4-3 are respectively connected with two The end plate 4-1 is connected, and the connection between the restraining steel plate 4-2 and the connecting end plate 4-1 connected to the shearing steel plate 4-3 and the shearing steel plate 4-3 and the connecting end plate 4-1 connected to the restraining steel plate 4 A gap of 40mm is provided between the connecting end plates 4-1 on the -2. Bolt holes 4-5 are provided on the two connecting end plates 4-1. The four lead cores 4-6 are evenly distributed on both sides of the horizontal center line of the composite viscoelastic layer 4-4; each lead core 4-6 passes through the restraining steel plate 4-2 vertically, shears The steel plate 4-3 and the composite viscoelastic layer 4-4 are sealed by the cover 4-7 on the outer surface of the outermost restraining steel plate 4-2.

Referring to Figures 1-2, the end of the disconnected part of the frame beam 1 is provided with a connecting plate 1-1 with bolt holes, and the two connecting end plates 4-1 of the lead core viscoelastic damper 4 are respectively connected to the two The connecting plate 1-1 is fixedly connected by high-strength bolts, and makes the composite viscoelastic layer 4-4 of the lead core viscoelastic damper 4 perpendicular to the horizontal plane.

Example 2

Referring to Figures 6-7, this example is a D-shaped eccentrically supported steel frame structure. A support member 3 is provided at the bottom of the frame beam 1 in each span, and the upper end of the support member 3 is supported on the bottom of the upper frame beam 1 close to the frame column. 2 positions. The intersection point of the support member 3 and the frame beam 1 and the frame beam section between the frame column 2 close to the intersection point are disconnected, and a lead core viscoelastic damper 4 is used as an energy dissipation beam section to connect the frame beam 1 and the frame Column 2; the two connecting end plates 4-1 of the lead core viscoelastic damper 4, one is fixedly connected with the connecting plate 1-1 at the end of the disconnected frame beam 1 through high-strength bolts, and the other is connected with the frame The sides of the column 2 are fixedly connected by high-strength bolts.

Embodiments other than the above in this example are the same as Example 1.

Claims (2)

1. an accentric support frame structure, this accentric support frame structure includes Vierendeel girder and the framework of steel Post, the lower section of described Vierendeel girder is provided with 1～2 supporting member being supported in bottom top frame beam；Described Between support component and the intersection point of Vierendeel girder and frame column, or, the intersection point of supporting member and Vierendeel girder and same across Interior Vierendeel girder between another supporting member and intersection point of Vierendeel girder is active beam link, it is characterised in that

Described active beam link is a lead for retractable pencil viscoelastic damper being serially connected on Vierendeel girder, this lead for retractable pencil viscoelasticity Two pieces of connection end plates of antivibrator are connected by high-strength bolt and Vierendeel girder are fixing respectively, and lead for retractable pencil is sticked The compound viscoelasticity layer of elastic damper is perpendicular to horizontal plane.

A kind of accentric support frame structure the most according to claim 1, it is characterised in that described lead The lead for retractable pencil quantity of core viscoelastic damper is the even number not less than 2, and is uniformly distributed in the damping of lead for retractable pencil viscoelasticity The both sides of the compound viscoelasticity layer horizontal center line of device.