Fabricated steel frame beam column substructure capable of comprehensively defending earthquake and progressive collapse

Abstract

The invention belongs to the technical field of structural engineering, and particularly relates to a fabricated steel frame beam column substructure capable of comprehensively defending against earthquakes and progressive collapse. Shearing force and axial tension / pressure generated between the cross beam component and the stand column component are borne through the multifunctional mechanical hinge, the damage degree of the substructure is reduced, and the safety of the substructure is guaranteed; under the action of large earthquakes and giant earthquakes, the multifunctional mechanical hinge rotates and generates plastic deformation to consume energy and consume energy generated by the earthquakes, meanwhile, the pre-tightening suspension component is tensioned, progressive collapse is avoided, and the progressive collapse resistance of the substructure is improved; when the substructure is close to collapse under the action of an earthquake, the pre-tightening suspension component suspends and bears the cross beam component, so that the vertical pulling capacity of the substructure is improved, and the consequence of continuous collapse of the substructure is relieved.

Description

Technical Field

[0001] The invention belongs to the technical field of structural engineering, and in particular relates to an assembled steel frame beam-column substructure capable of comprehensively defending against earthquakes and progressive collapse. Background Art

[0002] In recent years, with the frequent occurrence of various natural disasters, building structures may suffer from the combined effects of multiple accidental disasters during their service life cycle, such as earthquakes, fires, impacts, etc., which may lead to continuous collapse accidents of building structures. The lateral collapse caused by horizontal earthquakes and the continuous collapse caused by vertical loads are both characterized by low probability and high loss. They are the two main collapse modes of building structures at present. The consequences of earthquake collapse and continuous collapse affect each other and cause chain spread, resulting in more serious destructive consequences. Therefore, preventing the collapse of building structures under multiple disasters and comprehensively improving their earthquake resistance and anti-collapse performance have become hot issues in the field of structural engineering.

[0003] In the design of prefabricated steel structures, nodes are the bridges for transmitting forces between beams and columns, and the mechanical behavior of nodes directly affects the safety and reliability of the structure. However, there are significant differences in the stress performance and working mechanism of nodes under different disasters. Under earthquake action, nodes are mainly subjected to the combined action of shear force and bending moment. In order to improve the ductility of nodes and prevent brittle failure, various forms of weakened nodes, strengthened nodes, and self-resetting energy-absorbing nodes are usually used to resist earthquake action and dissipate the energy input by earthquakes. Under progressive collapse conditions, nodes will simultaneously withstand the combined action of shear force, bending moment, and axial force. The potential of the beam mechanism generated by the bending moment effect and the catenary mechanism generated by the axial force effect significantly affects the redistribution of the vertical load of the remaining structure, and ultimately determines the structure's ability to resist progressive collapse.

[0004] However, due to the different mechanisms of earthquake resistance and progressive collapse resistance, there is a contradiction between the earthquake resistance design and the progressive collapse resistance design of the structure. The ductility design in the earthquake resistance design will weaken the structure's ability to resist progressive collapse after losing the frame columns. The progressive collapse resistance of nodes with better earthquake resistance may deteriorate, and vice versa. In order to comprehensively improve the earthquake resistance and progressive collapse resistance of prefabricated steel structures, the present invention proposes a prefabricated steel frame column structure that comprehensively defends against earthquakes and progressive collapse. The new substructure has both good earthquake resistance and progressive collapse resistance. Summary of the invention

[0005] The object of the present invention is to provide an assembled steel frame beam-column substructure with comprehensive earthquake and progressive collapse protection to solve the above-mentioned problems.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] An assembled steel frame beam-column substructure with comprehensive protection against earthquakes and progressive collapse, comprising:

[0008] A vertically arranged column member;

[0009] A horizontally arranged crossbeam member, both ends of which are respectively connected to the column members;

[0010] A multifunctional mechanical hinge is provided at the connection between the cross beam member and the column member, and is used to withstand the shear force and the tension / compression force generated between the column member and the cross beam member during normal use and when a medium or small earthquake occurs;

[0011] A pre-tightening suspension component is inserted into the cross beam component, both ends of the pre-tightening suspension component are connected to the column component, and the pre-tightening suspension component is used to provide a pre-tightening force when a large earthquake or a huge earthquake occurs;

[0012] An earthquake-resistant floor slab installed above the crossbeam member;

[0013] The energy dissipation component is arranged between the earthquake-resistant floor slab and the column member, and is used to dissipate the collision force between the earthquake-resistant floor slab and the column member when an earthquake occurs.

[0014] In the assembled steel frame beam-column substructure for comprehensive earthquake and progressive collapse protection of the present invention, the cross beam member comprises:

[0015] The middle beam section is horizontally arranged, and both ends of the middle beam section are connected to the column member. At least two groups of second through hole groups are opened on the top surface of the middle beam section, and several second through hole groups are symmetrically arranged along the axis of the middle beam section. The second through hole group includes a plurality of second through holes, and the plurality of second through holes are evenly spaced along the length direction of the middle beam section. The second through holes are arranged in an elliptical shape.

[0016] In the assembled steel frame beam-column substructure for comprehensive earthquake and progressive collapse protection of the present invention, the multifunctional mechanical hinge comprises:

[0017] Two hinged plates are arranged in parallel, and the two hinged plates are hinged by a hinge rod. The ends of the two hinged plates away from each other are fixed with ear plates. The two ear plates are respectively connected and fixed with the ends of the column member and the middle beam section by bolts. Both ends of the hinge rod are fixed with a pressing plate, and the two pressing plates are fixed with one of the ear plates.

[0018] Two first energy dissipation structures are arranged on the hinge rod and are respectively located at two ends of the hinge rod, one end of the first energy dissipation structure is fixedly connected to the hinge plate, and the other end of the first energy dissipation structure slides along the length direction of the hinge rod;

[0019] A clamping assembly is arranged on a side of the first energy dissipation structure away from the hinge plate, the clamping assembly is arranged in contact with the first energy dissipation structure and the pressing plate, and the clamping assembly is used to increase the friction force in the first energy dissipation structure and between the first energy dissipation structure and the hinge plate, thereby playing an energy dissipation role;

[0020] The two second energy dissipation structures are respectively arranged at the upper and lower ends of the hinged plate, and the two ends of the second energy dissipation structure are respectively fixedly connected to the two ear plates.

[0021] In the assembled steel frame beam-column substructure for comprehensive earthquake and progressive collapse protection of the present invention, the first energy dissipation structure comprises:

[0022] Two friction discs are coaxially sleeved on the hinge rod, and one side of the friction disc is provided with an energy-absorbing corrugated pattern. The energy-absorbing corrugated patterns on the two friction discs are meshed with each other. One of the friction discs is fixedly connected to the hinge plate, and the other friction disc abuts against the clamping assembly. A slider is fixedly connected to the inner edge of the other friction disc, and the slider is slidably connected in a slide groove. The slide groove is provided on the outer side wall of the hinge rod, and the slide groove is provided along the length direction of the slide groove.

[0023] In the assembled steel frame beam-column substructure for comprehensive earthquake and progressive collapse protection of the present invention, the clamping assembly comprises:

[0024] A plurality of SMA disc springs are arranged between the pressure plate and the friction disk. The SMA disc springs at both ends are respectively in contact with the pressure plate and the friction disk. The plurality of SMA disc springs are all sleeved on the hinge rod.

[0025] In the assembled steel frame beam-column substructure for comprehensive earthquake and progressive collapse protection of the present invention, the second energy dissipation structure comprises:

[0026] Two energy absorbing plates are arranged in parallel. The two energy absorbing plates are respectively arranged at the top and bottom ends of the hinged plate. The two ends of the energy absorbing plates are respectively fixed to the two ear plates. The energy absorbing plates are provided with a plurality of energy absorbing collapse holes.

[0027] In the assembled steel frame beam-column substructure for comprehensive earthquake and progressive collapse protection of the present invention, the pre-tightening suspension member comprises:

[0028] A plurality of prestressed steel strands are passed through the middle beam section. The plurality of prestressed steel strands are respectively arranged on two opposite sides of the middle beam section. The plurality of prestressed steel strands on the same side are arranged at equal intervals from top to bottom. Both ends of the prestressed steel strands are connected to the column components through anchors.

[0029] In the assembled steel frame beam-column substructure for comprehensive earthquake and progressive collapse protection of the present invention, the energy dissipation component comprises:

[0030] An SMA damper, wherein two ends of the SMA damper are fixedly connected to the column member and the seismic resistant floor slab by bolts respectively.

[0031] In an assembled steel frame beam-column structure for comprehensive defense against earthquakes and progressive collapse of the present invention, the material of the seismic slab includes a high-damping rubber material, a plurality of floor slab connecting bolts are pre-embedded in the seismic slab, the plurality of floor slab connecting bolts are arranged in one-to-one correspondence with the plurality of second through holes, the floor slab connecting bolts pass through the seismic slab and are connected to the middle beam section through the second through holes, and the floor slab connecting bolts are movably arranged in the second through holes.

[0032] Compared with the prior art, the present invention has the following advantages and technical effects:

[0033] The steel frame beam-column substructure of the present invention bears the shear force and axial tension / compression generated between the crossbeam components and the column components through the multifunctional mechanical hinges during normal use and when subjected to medium and small earthquakes, thereby reducing the degree of damage to the building structure and ensuring the safety of the building structure; during large and huge earthquakes, the multifunctional mechanical hinges rotate, produce plastic deformation to consume energy, consume the energy generated by the vibration, and at the same time, the pre-tightened suspension components are tightened to avoid continuous collapse, thereby improving the building's ability to resist continuous collapse; when the building is close to collapse under the action of vibration, the pre-tightened suspension components suspend and bear the crossbeam components, thereby increasing the vertical tensioning capacity of the building and reducing the consequences of continuous collapse of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0035] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 It is a front view of the multifunctional mechanical hinge of the present invention;

[0037] Figure 3 It is a schematic diagram of the structure of the multifunctional mechanical hinge in the present invention;

[0038] Figure 4 It is a schematic diagram of the structure of the side column in the present invention;

[0039] Figure 5 It is a schematic diagram of the structure of the failed center column in the present invention;

[0040] Figure 6 It is a schematic diagram of the overall structure of the seismic floor slab in the present invention;

[0041] Figure 7 It is a schematic diagram of the overall structure of the middle beam section in the present invention;

[0042] Figure 8 It is a schematic diagram of the overall structure of the SMA damper in the present invention;

[0043] Fig. 9 It is a schematic diagram of the structure of a single prestressed steel strand in the present invention;

[0044] Among them, 1. side column; 2. side column beam section; 3. seismic slab; 4. failed middle column; 5. multifunctional mechanical hinge; 6. middle beam section; 7. SMA damper; 8. prestressed steel strand; 21. first through hole; 51. ear plate; 52. friction plate; 53. energy dissipation plate; 54. SMA disc spring; 55. hinged rod; 61. second through hole. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] Reference Figures 1 to 9 The present invention discloses an assembled steel frame beam-column substructure for comprehensive protection against earthquakes and progressive collapse, comprising:

[0048] A vertically arranged column member;

[0049] A horizontally arranged crossbeam member, both ends of which are respectively connected to the column members;

[0050] The multifunctional mechanical hinge 5 is arranged at the connection between the cross beam component and the column component. The multifunctional mechanical hinge 5 is used to withstand the shear force and the tension / compression force generated between the column component and the cross beam component during the normal use stage and the action of medium and small earthquakes;

[0051] The pre-tightening suspension component is inserted into the cross beam component, and both ends of the pre-tightening suspension component are connected to the column component. The pre-tightening suspension component is used to provide pre-tightening force during large and huge earthquakes;

[0052] A seismic resistant floor slab 3 is installed above the cross beam member;

[0053] The energy dissipation component is arranged between the earthquake-resistant floor slab 3 and the column components, and is used to dissipate the collision force between the earthquake-resistant floor slab 3 and the column components when an earthquake occurs.

[0054] The steel frame beam-column substructure of the present invention bears the shear force and axial tension / compression generated between the crossbeam components and the column components through the multifunctional mechanical hinge 5 during normal use and when subjected to medium and small earthquakes, thereby reducing the degree of damage to the building structure and ensuring the safety of the building structure; during large and huge earthquakes, the multifunctional mechanical hinge 5 rotates, produces plastic deformation to consume energy, consumes the energy generated by the vibration, and at the same time, the pre-tightened suspension components are tightened to avoid continuous collapse, thereby improving the building's ability to resist continuous collapse; when the building is close to collapse under the action of an earthquake, the pre-tightened suspension components suspend and bear the crossbeam components, thereby increasing the vertical tensioning capacity of the building and reducing the consequences of continuous collapse of the building.

[0055] In one feasible solution, the crossbeam component includes:

[0056] The middle beam section 6 is arranged horizontally, and both ends of the middle beam section 6 are connected to the column components. At least two groups of second through hole groups are opened on the top surface of the middle beam section 6, and the plurality of second through hole groups are symmetrically arranged along the axis of the middle beam section 6. The second through hole group includes a plurality of second through holes 61, and the plurality of second through holes 61 are arranged at equal intervals along the length direction of the middle beam section 6, and the second through holes 61 are arranged in an elliptical shape.

[0057] In one feasible solution, the multifunctional mechanical hinge 5 comprises:

[0058] Two hinged plates are arranged in parallel, and the two hinged plates are hinged by a hinge rod 55. The ends of the two hinged plates away from each other are fixedly connected with ear plates 51. The two ear plates 51 are respectively connected and fixed with the ends of the column components and the middle beam section 6 by bolts. Both ends of the hinge rod 55 are fixedly connected with a pressure plate, and the two pressure plates are fixedly connected with one of the ear plates 51.

[0059] Two first energy dissipation structures are arranged on the hinge rod 55 and are respectively located at two ends of the hinge rod 55, one end of the first energy dissipation structure is fixedly connected to the hinge plate, and the other end of the first energy dissipation structure slides along the length direction of the hinge rod 55;

[0060] A clamping assembly is arranged on a side of the first energy dissipation structure away from the hinge plate, the clamping assembly is arranged in contact with the first energy dissipation structure and the pressing plate, and the clamping assembly is used to increase the friction force in the first energy dissipation structure and between the first energy dissipation structure and the hinge plate, thereby playing an energy dissipation role;

[0061] The two second energy dissipation structures are respectively arranged at the upper and lower ends of the hinged plate, and the two ends of the second energy dissipation structures are respectively fixedly connected to the two ear plates 51 .

[0062] In a feasible solution, the first energy dissipation structure includes:

[0063] Two friction discs 52 are coaxially sleeved on the hinge rod 55. One side of the friction disc 52 is provided with an energy-absorbing corrugated pattern. The energy-absorbing corrugated patterns on the two friction discs 52 are meshed with each other. One of the friction discs 52 is fixedly connected to the hinge plate, and the other friction disc 52 is abutted against the clamping assembly. A slider is fixedly connected to the inner edge of the other friction disc 52. The slider is slidably connected in a slide groove. The slide groove is provided on the outer side wall of the hinge rod 55 and is arranged along the length direction of the slide groove.

[0064] In one feasible solution, the pressing assembly includes:

[0065] A plurality of SMA disc springs 54 are disposed between the pressure plate and the friction plate 52 . The SMA disc springs 54 at both ends are in contact with the pressure plate and the friction plate 52 respectively. The plurality of SMA disc springs 54 are sleeved on the hinge rod 55 .

[0066] In one feasible solution, the second energy dissipation structure includes:

[0067] The two energy absorbing plates 53 are arranged in parallel. The two energy absorbing plates 53 are respectively arranged at the top and bottom ends of the hinged plate. The two ends of the energy absorbing plates 53 are respectively fixed to the two ear plates 51. The energy absorbing plates 53 are provided with a plurality of energy absorbing collapse holes.

[0068] In one feasible solution, the pre-tensioning suspension component includes:

[0069] Multiple prestressed steel strands 8 are passed through the middle beam section 6. The multiple prestressed steel strands 8 are respectively arranged on two opposite sides of the middle beam section 6. The multiple prestressed steel strands 8 on the same side are arranged at equal intervals from top to bottom. Both ends of the prestressed steel strands 8 are connected to the column components through anchors.

[0070] In one feasible solution, the energy consuming components include:

[0071] The SMA damper 7 has two ends fixedly connected to the column member and the seismic resistant floor slab 3 by bolts.

[0072] In a feasible solution, the material of the seismic resistant floor 3 includes a high-damping rubber material, and a plurality of floor connecting bolts are pre-embedded in the seismic resistant floor 3. The plurality of floor connecting bolts are arranged in a one-to-one correspondence with the plurality of second through holes 61. The floor connecting bolts pass through the seismic resistant floor 3 and are connected to the middle beam section 6 through the second through holes 61. The floor connecting bolts can be movably arranged in the second through holes 61.

[0073] One of the experimental examples:

[0074] Reference Figure 1 The column component includes two side columns 1, which are arranged at two ends of the two middle beam sections 6 that are far away from each other, and also includes a failed middle column 4, which is arranged between the two middle beam sections 6. The two middle beam sections 6 are coaxially arranged, and a side column beam section 2 is fixedly connected to one side of the side column 1. A first through hole 21 is opened on the side column beam section 2, and a bolt passes through the first through hole 21 and is fixedly connected to the middle beam section 6. The side column beam section 2 is fixedly connected to a lug plate 51 on one side of the multifunctional mechanical hinge 5 by bolts, and the middle beam section 6 is fixedly connected to a lug plate 51 on the other side of the multifunctional mechanical hinge 5 by bolts. The side column beam section 2 is fixedly connected to both sides of the failed middle column 4, and the side column beam sections 2 are fixedly connected to the two side column beams. Segment 2 is fixedly connected with two middle beam segments 6 by bolts respectively, seismic slab 3 is fixedly connected with middle beam segment 6 by bolts, both ends of seismic slab 3 are fixedly connected with SMA damper 7 by bolts, SMA damper 7 is fixedly connected with side column 1 / failed middle column 4 by bolts, multiple prestressed steel strands 8 are penetrated on opposite sides of middle beam segment 6, multiple prestressed steel strands 8 on the same side are arranged at equal intervals from top to bottom, prestressed steel strands 8 are arranged along the length direction of middle beam segment 6, both ends of prestressed steel strands 8 pass through middle beam segment 6 and are connected with side column 1 / failed middle column 4 by T-shaped anchors;

[0075] When encountering a minor earthquake, the two hinged plates of the multifunctional mechanical hinge 5 will not rotate relative to each other. The material of the energy dissipation plate 53 is shape memory alloy (SMA). The energy dissipation plate 53 bears the axial tension / compression between the side column 1 / failed middle column 4 and the middle beam section 6. The multifunctional mechanical hinge 5 bears the shear force between the side column 1 / failed middle column 4 and the middle beam section 6, ensuring the safety of the connection structure between the side column 1 / failed middle column 4 and the middle beam section 6, and improving the earthquake resistance of the building. At this time, the function of the multifunctional mechanical hinge 5 will not be damaged. At the same time, since the earthquake-resistant floor slab 3 is supported by high-damping rubber material and the end is connected to the side column 1 / failed middle column 4 through the SMA damper 7, and displacement can occur between the earthquake-resistant floor slab 3 and the middle beam section 6, the earthquake-resistant floor slab 3 will not be damaged in the case of a minor earthquake.

[0076] When encountering a larger earthquake, a larger deformation occurs between the side column 1 / failed middle column 4 and the middle beam section 6. At this time, the two hinged plates of the multifunctional mechanical hinge 5 rotate relative to each other. At this time, the energy dissipation plate 53 collapses to consume the earthquake energy. At the same time, the friction disk 52 fixed to the hinged plate and the friction disk 52 slidably connected to the hinge rod 55 move relative to each other. Under the action of the wave pattern on the friction disk 52, the friction disk 52 slidably connected to the hinge rod 55 moves and squeezes the SMA disc spring 54. The SMA disc spring 54 undergoes plastic deformation to consume the earthquake energy.

[0077] When the building is close to the collapse limit under the action of an earthquake, the failed middle column 4 begins to move downward under the action of the gravity load, and the middle beam section 6 undergoes significant bending deformation due to the displacement of the failed middle column 4. The multifunctional mechanical hinge 5 simultaneously bears the combined action of shear force, bending moment and axial force. At this time, the prestressed steel strands 8 are gradually tightened to provide a preload force, thereby avoiding continuous collapse accidents of the building and improving the building's ability to resist continuous collapse. When the building enters the continuous collapse limit state under the action of an earthquake, the prestressed steel strands 8 play a vertical suspension role on the middle beam sections 6 one by one, thereby effectively slowing down the speed of continuous collapse of the building and alleviating the consequences of continuous collapse of the building.

[0078] The steel frame beam-column substructure of the present invention resists earthquake action through the multifunctional mechanical hinge 5 during normal use and under the action of medium and small earthquakes. The multifunctional mechanical hinge 5 does not undergo relative displacement. The substructure bears the shear force and axial tension / compression generated between the side column beam section 2 and the middle beam section 6 through the multifunctional mechanical hinge 5, so that the safety of the substructure is guaranteed; under the action of large and huge earthquakes, the multifunctional mechanical hinge 5 rotates relatively, and energy is consumed and self-reset is performed through the relative displacement of the friction disk 52 welded to the ear plate 51 (so that the SMA disc spring produces a superelastic effect) and the plastic deformation of the energy dissipation plate 53. At the same time, the pre-tightened suspension component is tightened to avoid continuous collapse, thereby improving the substructure's ability to resist continuous collapse; when the substructure approaches the collapse limit state under the action of large and huge earthquakes, the pre-tightened suspension component suspends and bears the load on the crossbeam component, thereby increasing the vertical tensioning capacity of the substructure and reducing the consequences of continuous collapse of the substructure.

[0079] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0080] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An assembled steel frame beam-column structure with comprehensive protection against earthquakes and progressive collapse, characterized in that: include: A vertically arranged column member; A horizontally arranged crossbeam member, both ends of which are respectively connected to the column members; A multifunctional mechanical hinge (5) is arranged at the connection between the cross beam component and the column component, and the multifunctional mechanical hinge (5) is used to withstand the shear force and the tension / compression force generated between the column component and the cross beam component during normal use and when a medium or small earthquake occurs; A pre-tightening suspension component is inserted into the cross beam component, both ends of the pre-tightening suspension component are connected to the column component, and the pre-tightening suspension component is used to provide a pre-tightening force when a large earthquake or a huge earthquake occurs; An earthquake-resistant floor slab (3) installed above the crossbeam member; An energy dissipation component is arranged between the earthquake-resistant floor slab (3) and the column component, and is used to dissipate the collision force between the earthquake-resistant floor slab (3) and the column component when an earthquake occurs.

2. The assembled steel frame beam-column substructure for comprehensive earthquake and progressive collapse protection according to claim 1, characterized in that: The cross beam member comprises: The middle beam section (6) is horizontally arranged, and both ends of the middle beam section (6) are connected to the column components. At least two groups of second through hole groups are opened on the top surface of the middle beam section (6), and the plurality of second through hole groups are symmetrically arranged along the axis of the middle beam section (6). The second through hole group includes a plurality of second through holes (61), and the plurality of second through holes (61) are arranged at equal intervals along the length direction of the middle beam section (6), and the second through holes (61) are arranged in an elliptical shape.

3. The assembled steel frame beam-column substructure for comprehensive earthquake and progressive collapse protection according to claim 2, characterized in that: The multifunctional mechanical hinge (5) comprises: Two hinged plates are arranged in parallel, and the two hinged plates are hingedly connected by a hinge rod (55). The ends of the two hinged plates that are away from each other are fixedly connected with ear plates (51). The two ear plates (51) are respectively connected and fixed to the ends of the column component and the middle beam section (6) by bolts. Both ends of the hinge rod (55) are fixedly connected with pressure plates, and the two pressure plates are fixedly connected to one of the ear plates (51). Two first energy dissipation structures are arranged on the hinge rod (55) and are respectively located at two ends of the hinge rod (55), one end of the first energy dissipation structure is fixedly connected to the hinge plate, and the other end of the first energy dissipation structure slides along the length direction of the hinge rod (55); A clamping assembly is arranged on a side of the first energy dissipation structure away from the hinge plate, the clamping assembly is arranged in contact with the first energy dissipation structure and the pressing plate, and the clamping assembly is used to increase the friction force in the first energy dissipation structure and between the first energy dissipation structure and the hinge plate, thereby playing an energy dissipation role; Two second energy dissipation structures are respectively arranged at the upper and lower ends of the hinged plate, and the two ends of the second energy dissipation structure are respectively fixedly connected to the two ear plates (51).

4. The assembled steel frame beam-column substructure for comprehensive earthquake and progressive collapse protection according to claim 3, characterized in that: The first energy dissipation structure comprises: Two friction discs (52) are coaxially sleeved on the hinge rod (55), and one side of the friction disc (52) is provided with an energy-dissipating corrugation. The energy-dissipating corrugations on the two friction discs (52) are meshed with each other. One of the friction discs (52) is fixedly connected to the hinge plate, and the other friction disc (52) is in contact with the clamping assembly. A slider is fixedly connected to the inner edge of the other friction disc (52), and the slider is slidably connected in a slide groove. The slide groove is provided on the outer side wall of the hinge rod (55), and the slide groove is arranged along the length direction of the slide groove.

5. The assembled steel frame beam-column substructure for comprehensive earthquake and progressive collapse protection according to claim 4, characterized in that: The clamping assembly comprises: A plurality of SMA disc springs (54) are arranged between the pressure plate and the friction plate (52), the SMA disc springs (54) at both ends are respectively in contact with the pressure plate and the friction plate (52), and the plurality of SMA disc springs (54) are all sleeved on the hinge rod (55).

6. The assembled steel frame beam-column substructure for comprehensive earthquake and progressive collapse protection according to claim 3, characterized in that: The second energy dissipation structure comprises: The two energy absorbing plates (53) are arranged in parallel. The two energy absorbing plates (53) are respectively arranged at the top end and the bottom end of the hinged plate. The two ends of the energy absorbing plates (53) are respectively fixed to the two ear plates (51). The energy absorbing plates (53) are provided with a plurality of energy absorbing collapse holes.

7. The assembled steel frame beam-column substructure for comprehensive earthquake and progressive collapse protection according to claim 3, characterized in that: The preloaded suspension component comprises: A plurality of prestressed steel strands (8) are inserted into the middle beam section (6), and the plurality of prestressed steel strands (8) are respectively arranged on two opposite sides of the middle beam section (6). The plurality of prestressed steel strands (8) on the same side are arranged at equal intervals from top to bottom, and both ends of the prestressed steel strands (8) are connected to the column member via anchors.

8. The assembled steel frame beam-column substructure for comprehensive earthquake and progressive collapse protection according to claim 3, characterized in that: The energy consuming components include: An SMA damper (7), wherein two ends of the SMA damper (7) are fixedly connected to the column component and the seismic resistant floor slab (3) respectively by bolts.

9. The assembled steel frame beam-column substructure for comprehensive earthquake and progressive collapse protection according to claim 2, characterized in that: The material of the earthquake-resistant floor (3) includes a high-damping rubber material. A plurality of floor connection bolts are pre-buried in the earthquake-resistant floor (3). The plurality of floor connection bolts are arranged in a one-to-one correspondence with the plurality of second through holes (61). The floor connection bolts pass through the earthquake-resistant floor (3) and are connected to the middle beam section (6) through the second through holes (61). The floor connection bolts are movably arranged in the second through holes (61).

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