CN102979170B - Multi-story high-rise assembled steel structure prestressed eccentrically-braced system - Google Patents

Abstract

A prestressed eccentric bracing system of a multi-story fabricated steel structure belongs to the technical field of structural engineering. The multi-story prefabricated steel structure prestressed eccentric support system is composed of a prefabricated floor slab, a prefabricated prestressed eccentric support and a fabricated flange column assembled by bolts; the prefabricated floor includes A board, B board and C board The prefabricated floor slabs are spliced with bolts to form the entire floor slab of the building. The steel structure system of the present invention combines modularization, factoryization and assembly, realizes factory production, on-site quick assembly, improves construction speed, reduces construction period, and reduces project cost. At the same time, the invention completely uses high-strength bolts On-site assembly avoids environmental pollution caused by concrete pouring and steel welding. When structural components are dismantled, they can be recycled efficiently, reducing construction waste, and truly realizing the concept of green environmental protection. It is a green structural system.

Description

A prestressed eccentric bracing system for multi-story prefabricated steel structures

technical field

The invention relates to a multi-high-rise assembled steel structure prestressed eccentric support system, which belongs to the technical field of structural engineering.

Background technique

my country's annual urban and rural housing area is 2 billion square meters, of which more than 80% are high-energy buildings, and the energy consumption per unit building area in my country is more than twice that of developed countries. According to the statistics of the China Iron and Steel Association, my country's steel output exceeded 700 million tons in 2011, ranking first in the world's steel output for 16 consecutive years. Our country is less than 4%. As the country with the largest construction scale and steel output in the world, China's development of housing, including residential steel structures, is seriously lagging behind.

The implementation of my country's "Twelfth Five-Year Plan" has brought the construction industry into the era of energy conservation, emission reduction and green environmental protection. The "Green Building Evaluation Standard" issued by the Ministry of Housing and Urban-Rural Development defines green buildings as: Inside, save resources, land, energy, water, materials, protect the environment and reduce pollution to the greatest extent, provide people with healthy, applicable and efficient use of space, and a building that coexists harmoniously with nature. This concept is an important strategic transformation for changing the mode of economic growth and promoting sustainable development, and it really provides a major opportunity for the innovation and industrialization of the corresponding system of steel structure for housing and residential buildings in my country.

At present, the systematic research on multi-high-rise prefabricated steel structure residences at home and abroad is in its infancy, and the innovation of industrialized prefabricated high-rise steel structure systems is imperative. The construction of traditional steel structure residential buildings uses a lot of site welding, the construction speed is slow, and the pollution to the environment is serious. The most important thing is that the quality of the welds is not suitable for control, and the working environment of the workers is poor, which seriously affects the safety performance of the building.

Traditional steel structure residential buildings have not fully utilized the advantages of steel structure residential buildings. With the continuous development of steel structure building technology in my country, multi-high-rise steel structure systems should adopt design modularization and component standardization to promote industrialization with standardization and promote industrialization with industrialization. However, domestic research on the modularization of industrialized prefabricated steel structures is still in its infancy, and an innovative modular prestressed eccentric support system for prefabricated steel structures is urgently needed.

Contents of the invention

The invention proposes a prestressed eccentric support system of a multi-story assembled steel structure belonging to the technical field of structural engineering. Its purpose is to combine modularization, factoryization, standardization and assembly in the production and construction of the steel structure system, realize factory production, on-site quick assembly, and improve the construction speed on the premise of ensuring the construction quality. The construction period is reduced and the project cost is reduced.

The multi-high-rise assembled steel structure prestressed eccentric support system proposed by the present invention is characterized in that the multi-high-rise assembled steel structure eccentric support system is composed of assembled floor slabs, assembled prestressed eccentric supports and assembled flange columns. Assembled by bolts; the prefabricated floor is spliced by three kinds of prefabricated floors A, B and C.

The prestressed eccentric support system of multi-high-rise assembled steel structure proposed by the present invention is characterized in that the A plate is composed of a short main beam I1, a long main beam I2, a side secondary beam 3, a middle secondary beam 4, a connecting plate I5, a floor plate 6. Column base I7, column base II8, connecting plate IV25 and connecting plate V26; all the components of the A plate are processed and manufactured in the factory, and then the components are assembled into the prefabricated floor by welding and bolt connection a. The short main beam Ⅰ1 and the side secondary beam 3 are placed vertically, and the short main beam Ⅰ1 and the side secondary beam 3 are connected through the column base Ⅰ7 and the connecting plate I5. The upper and lower flange plates Ⅰ14 of the column base Ⅰ7 are respectively connected with the short main beam Ⅰ1 and The upper and lower flanges of the side and secondary beams 3 are flush, and the two sides of the connecting plate I5 are respectively connected with the short main beam I1 and the flanges of the side and secondary beams 3, and the two connecting plates I5 are respectively connected to the upper and lower wings On the edge, all the connection parts are welded; the two short main beams I1 are placed on the same straight line and connected by the column base II8, the upper and lower flange plates I14 of the column base II8 are respectively connected to the upper and lower wings of the two short main beams I1 The edges are flush, and all the connection parts are welded; the middle secondary beam 4 is parallel to the side secondary beam 3, perpendicular to the two short main beams I1, and connected to the two short main beams I1 through the column seat II8 and the connecting plate I5. The upper and lower flange plates I14 of the column seat II8 are respectively flush with the upper and lower flanges of the middle secondary beam 4, and the two sides of the connecting plate I5 are respectively connected with the flanges of the short main beam I1 and the middle secondary beam 4, and the two pieces are connected The plate I5 is connected to the upper flange and the lower flange respectively, and all the connection parts are welded; the long main beam I2 is parallel to the two short main beams I1, perpendicular to the two side beams 3 and the middle beam 4, Connect the two side beams 3 and the middle beam 4 through the connecting plate I5, connecting plate IV25 and connecting plate V26; the connecting plate IV25 is located at the end of the side beam 3, and the upper and lower ends of the connecting plate IV25 are connected The flanges of the beam 3 are connected, and one side is connected with the web of the side secondary beam 3; the connecting plate V26 is a rectangular steel plate, one side of which is connected with the web of the middle secondary beam 4 in parallel, and the other three sides are connected with the long main beam respectively. The flange of the beam I2 is connected to the web; the two sides of the connecting plate I5 connect the flange of the long main beam I2 and the side secondary beam 3, and the flange connecting the long main beam I2 and the middle secondary beam 4, the connecting plate I5 is respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the floor 6 is placed on the plane surrounded by each beam, and the floor 6 is connected to each beam by pegs.

The prestressed eccentric support system of multi-high-rise assembled steel structure proposed by the present invention is characterized in that the B plate is composed of long main beam I2, side secondary beam 3, middle secondary beam 4, connecting plate I5, floor slab 6, short main beam II11, connecting plate IV25 and connecting plate V26; all the components of the B plate are processed and manufactured in the factory, and then the components are assembled into the prefabricated floor B by welding and bolt connection. The short main beam II11 and the side and secondary beams 3 are vertically placed, and the short main beam II11 and the side and secondary beams 3 are connected through the connecting plate I5 and the connecting plate IV25. The connecting plate IV25 is located at the end of the side and secondary beams 3, and the connecting plate The upper and lower ends of IV25 are connected to the flange of the side and secondary beam 3, and one side is connected to the web of the side and secondary beam 3, and the two sides of the connecting plate I5 are respectively connected to the flange of the short main beam II11 and the side and secondary beam 3 The two connecting plates I5 are respectively connected to the upper flange and the lower flange, and all the connecting parts are welded; the two short main beams II11 are placed on the same straight line without direct connection; the middle secondary beam 4 and The side secondary beam 3 is parallel to and perpendicular to the two short main beams II11, and connected to the two short main beams II11 through the connection plate I5 and the connection plate IV25. The upper and lower ends of the connection plate IV25 are connected to the flange of the beam, and one side is connected to the web of the beam; the two sides of the connection plate I5 are respectively connected to the flange of the short main beam II11 and the middle secondary beam 4, The connection plate I5 is connected to the upper flange and the lower flange respectively, and all the connection parts are welded; the long main beam I2 is parallel to the two short main beams II11, perpendicular to the two side beams 3 and the middle beam 4, Connect the two side beams 3 and the middle beam 4 through the connecting plate I5, connecting plate IV25 and connecting plate V26, the connecting plate IV25 is located at the end of the side beam 3, the upper and lower ends of the connecting plate IV25 are connected to the The flanges of the beam 3 are connected, and one side is connected with the web of the side secondary beam 3; the connecting plate V26 is a rectangular steel plate, one side of which is connected with the web of the middle secondary beam 4 in parallel, and the other three sides are connected with the long main beam respectively. The flange of the beam I2 is connected to the web; the two sides of the connecting plate I5 connect the flange of the long main beam I2 and the side secondary beam 3, and the flange connecting the long main beam I2 and the middle secondary beam 4, the connecting plate I5 is respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the floor 6 is placed on the plane surrounded by each beam, and the floor 6 is connected to each beam by pegs.

The prestressed eccentric support system of multi-high-rise assembled steel structure proposed by the present invention is characterized in that the C plate is composed of side secondary beams 3, middle secondary beams 4, connecting plates I5, floor slabs 6, column bases III9, column bases IV10, The short main beam II11, the long main beam II12, the connecting plate IV25 and the connecting plate V26; all the components of the C plate are processed and manufactured in the factory, and then the components are assembled into the prefabricated floor by welding and bolt connection c. The short main beam II11 and the side secondary beam 3 are vertically placed, and the short main beam II11 and the side secondary beam 3 are connected through the column base III9 and the connecting plate I5, and the upper and lower flange plates I14 of the column base III9 are respectively connected with the short main beam II11 and the The upper and lower flanges of the side and secondary beams 3 are flush, and the two sides of the connecting plate I5 are respectively connected with the short main beam II11 and the flanges of the side and secondary beams 3, and the two connecting plates I5 are respectively connected to the upper and lower wings On the edge, all the connection parts are welded; the two short main beams II11 are placed on the same straight line and connected through the column base IV10. The edges are flush, and all the connection parts are welded; the middle secondary beam 4 is parallel to the side secondary beam 3, perpendicular to the two short main beams Ⅱ11, and connected to the two short main beams Ⅱ11 through the column base Ⅳ10 and the connecting plate I5. The upper and lower flange plates I14 of the column base IV10 are respectively flush with the upper and lower flanges of the middle secondary beam 4, and the two sides of the connecting plate I5 are respectively connected with the flanges of the short main beam I1 and the middle secondary beam 4. The plate I5 is connected to the upper flange and the lower flange respectively, and all the connection parts are welded; the long main beam II12 is parallel to the two short main beams II11, perpendicular to the two side beams 3 and the middle beam 4, Connect the two side beams 3 and the middle beam 4 through the connecting plate I5, connecting plate IV25 and connecting plate V26, the connecting plate IV25 is located at the end of the side beam 3, the upper and lower ends of the connecting plate IV25 are connected to the The flanges of the beam 3 are connected, and one side is connected with the web of the side secondary beam 3; the connecting plate V26 is a rectangular steel plate, one of which is connected to the web of the middle secondary beam 4, and the other three sides are respectively connected with the long main beam The flange of II12 is connected to the web; the two sides of the connecting plate I5 connect the flange of the long main beam II12 and the side secondary beam 3, and the flange connecting the long main beam II12 and the middle secondary beam 4, the connecting plate I5 They are respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the floor 6 is placed on the plane surrounded by each beam, and the floor 6 is connected to each beam by studs.

The multi-story prefabricated steel structure prestressed eccentric support system proposed by the present invention is characterized in that the column base includes four types of column bases, namely column base I7, column base II8, column base III9 and column base IV10; The column base V13 is composed of two flange plates I14 and a square steel pipe I15, and the two flange plates I14 are respectively located on the two ends of the square steel tube I15, and all connections are welded; the column base I7 is formed by the column base V13 Composed of two connecting plates II16, the two connecting plates II16 are respectively located on the central axis of the two outer surfaces adjacent to the column base V13, and connected with the flange plate I14 and the square steel pipe I15; the connecting plate II16 is a rectangular steel plate , the two faces parallel to the flange plate I14 are respectively connected with the upper and lower flange plates I14, the two parallel faces perpendicular to the flange plate I14, one is connected with the square steel pipe I15, and the other is flush with the outer edge of the flange plate I14 All connections are welded. The column base II8 is composed of a column base V13 and three connecting plates II16, and the three connecting plates II16 are respectively located on the central axes of the three outer surfaces of the column base V13, and are connected with the flange plate I14 and the square steel pipe I15; The connection plate II16 is a rectangular steel plate, the two faces parallel to the flange plate I14 are respectively connected with the upper and lower flange plates I14, and the two parallel faces perpendicular to the flange plate I14, one is connected with the square steel pipe I15, and the other is connected with the flange plate I15. The outer edge of the blue plate I14 is flush, and all connections are welded. The column base III9 is composed of a column base V13, two connecting plates II16 and three connecting plates III17, the connecting plates II16 and connecting plates III17 are arranged on three adjacent outer surfaces, and two connecting plates are arranged on the first surface Plate III17 is symmetrically arranged along the central axis of the surface, the second surface is adjacent to the first surface, a connecting plate III17 and a connecting plate II16 are arranged on the second surface, and the connecting plate is arranged on the side close to the first surface III17, the connecting plate II16 is arranged at the central axis of the surface, the third surface is adjacent to the second surface, and a connecting plate II16 is arranged on the third surface, located at the central axis of the surface. The connecting plate II16 is a rectangular steel plate, the two faces parallel to the flange plate I14 are respectively connected with the upper and lower flange plates I14, the two parallel faces perpendicular to the flange plate I14, one is connected with the square steel pipe I15, and the other is connected with the square steel pipe I15. It is flush with the outer edge of the flange plate I14, and all connections are welded. The connecting plate III17 is an angle steel or channel steel, the upper and lower sections are respectively connected with the upper and lower flange plates I14, the outer surface is flush with the outer edge of the flange plate I14, and all connections are welded. The column base IV10 is composed of a column base V13, three connecting plates II16 and four connecting plates III17, the connecting plates II16 and connecting plates III17 are respectively arranged on four surfaces, and two connecting plates III17 are arranged on the first surface, Arranged symmetrically along the central axis of the surface, the second surface is adjacent to the first surface, a connecting plate III17 and a connecting plate II16 are arranged on the second surface, and the connecting plate III17 is arranged on the side close to the first surface. The connecting plate II16 is arranged at the central axis of the surface, the third surface is adjacent to the second surface, and a connecting plate II16 is arranged on the third surface, which is located at the central axis of the surface. The fourth surface is connected to the third surface and The first surface is adjacent, and a connecting plate III17 and a connecting plate II16 are arranged on the fourth surface. The connecting plate III17 is arranged on the side close to the first surface, and the connecting plate II16 is arranged on the central axis of the surface. The connecting plate II16 is a rectangular steel plate, the two faces parallel to the flange plate I14 are respectively connected with the upper and lower flange plates I14, the two parallel faces perpendicular to the flange plate I14, one is connected with the square steel pipe I15, and the other is connected with the square steel pipe I15. It is flush with the outer edge of the flange plate I14, and all connections are welded. The connecting plate III17 is an angle steel or channel steel, the upper and lower sections are respectively connected with the upper and lower flange plates I14, the outer surface is flush with the outer edge of the flange plate I14, and all connections are welded.

The prestressed eccentric support system of multi-story assembled steel structure proposed by the present invention is characterized in that the assembled flange column includes three types of assembled flange columns, namely flange column I20, flange column II22 and Flange column III24; the flange column I20 is composed of a square steel pipe II18 and two flange plates II19, and the two flange plates II19 are respectively located on the two ends of the square steel pipe II18, and all connections are welded; The flange plate II19 includes a bolt hole in the middle and bolt holes in the extensions on two adjacent sides, and the bolt hole in the middle corresponds to the bolt hole in the flange plate I14. The flange column II22 is composed of a square steel pipe II18 and two flange plates III21, the two flange plates III21 are respectively located on the two ends of the square steel pipe II18, and all connections are welded; the flange plate III21 The section form of the flange can be diversified, including the bolt holes in the middle and the bolt holes in the three-side extensions. The bolt holes in the middle correspond to the bolt holes in the flange plate I14. The flange column III24 is composed of a square steel pipe II18 and two flange plates IV23, and the two flange plates IV23 are respectively located on the two ends of the square steel pipe II18, and all connections are welded; the flange plate IV23 The cross-sectional form of the flange can be diversified, including the bolt holes in the middle and the bolt holes in the four side extensions. The bolt holes in the middle correspond to the bolt holes in the flange plate I14. The flange plate Ⅱ19, flange plate Ⅲ21 and flange plate Ⅳ23 include the bolt holes in the middle part and the bolt holes in the overhang part. The role of the beam is to connect it to the beam by using bolts, so that the beam-column joint can achieve the effect of rigid connection, and at the same time, the end plate of the overhang also plays the role of supporting the upper floor. The flange column I20 is connected with the column base I7 and adjacent beams in the assembled floor system after splicing, and all connections are connected by bolts; the flange column II22 is connected in the assembled floor system after splicing , to connect with column base Ⅱ8, column base Ⅲ9 and adjacent beams, and all connections are bolted; the flange column Ⅲ24 is connected with column base Ⅳ10 and adjacent beams in the prefabricated floor system after splicing All connections are bolted.

The prestressed eccentric support system of the multi-story prefabricated steel structure proposed by the present invention is characterized in that the prefabricated floor slab A and the prefabricated floor slab B are spliced, and the splicing method is to combine the long main beam I2 of the A slab and the The long main girder I2 of plate B is spliced, and the splicing position is at least the end of the long main girder I2 of plate A and the long main girder I2 of plate B, and the middle quarter. The prefabricated floor board B is spliced with the prefabricated floor board C. One splicing method is to connect the side beam 3, the middle beam 4 and the short main beam II11 of the B board with the column seat III9 and the column base of the C board. Seat IV10 and short main beam II11 are spliced, the splicing position is at least the side beam 3 of plate B and the column base III9 of plate C, the middle secondary beam 4 of plate B is spliced with the column base IV10 of plate C, and the short beam of plate B is spliced The main beam Ⅱ11 is spliced with the column base Ⅲ9 and column base Ⅳ10 of the C slab, the short main beam Ⅱ11 of the B slab and the short main beam Ⅱ11 of the C slab are spliced at the end and middle of the short main beam Ⅱ11, and all the splicing uses The bolts are spliced on site; the prefabricated floor plate B is spliced with the prefabricated floor plate C, and another splicing method is to splice the long main beam II12 of C plate and the long main beam I2 of B plate, and the splicing position At least at the end of the long main beam II12 of the C plate and the long main beam I2 of the B plate, and the middle quarter, all the splicing shall be spliced on site with bolts. The C-slab of the prefabricated floor is spliced with the A-slab of the prefabricated floor. The splicing method is to splice the long main beam II12 of the C-slab and the long main beam I2 of the A-slab, and the splicing position is at least the long main beam of the C-slab At the end of the long main beam I2 of Ⅱ12 and plate A, and at the middle quarter, all the splicing shall be spliced on site with bolts.

The multi-story prefabricated steel structure prestressed eccentric support system proposed by the present invention is characterized in that the basic components of the prefabricated floor system are A board, B board and C board, and the two ends of the prefabricated floor system are A boards unit, the middle part is the alternate splicing unit of board B and board C.

The multi-story prefabricated steel structure prestressed eccentric support system proposed by the present invention is characterized in that the two ends of the prestressed eccentric support 27 are prestressed cable heads, and the middle part adopts prestressed cables or prestressed steel tie rods; The ends of lug plate I28 and lug plate II29 include flange plates, and bolts are used to connect lug plate I28 and lug plate II29 to the joints of beams and columns, or at the flanges of beams, and the prestressed eccentric support 27 passes through the prestressed cable The head is connected with the ear plate I 28 and the ear plate II 29 to form a prestressed eccentric support structure system as a whole.

The multi-high-rise assembled steel structure prestressed eccentric support system proposed by the present invention is an innovative structural system in the assembled high-rise building steel structure system.

Description of drawings

Fig. 1 is the splicing plane layout diagram of the assembled floor slab of the present invention

Fig. 2 is the schematic diagram of prefabricated floor A plate of the present invention

Fig. 3 is the unit exploded view of prefabricated floor A plate of the present invention

Fig. 4 is the schematic diagram of the prefabricated floor B board of the present invention

Fig. 5 is the unit exploded view of the prefabricated floor B board of the present invention

Fig. 6 is the schematic diagram of the prefabricated floor C plate of the present invention

Fig. 7 is the unit exploded view of the prefabricated floor C plate of the present invention

Fig. 8 is an exploded view of unit 1 of the prefabricated floor slab node of the present invention

Fig. 9 is an exploded view of the prefabricated floor node 2 unit of the present invention

Fig. 10 is an exploded view of the prefabricated floor node 3 units of the present invention

Fig. 11 is an exploded view of the assembled floor node 4 units of the present invention

Fig. 12 is an exploded view of unit 5 of the prefabricated floor node of the present invention

Fig. 13 is an exploded view of unit 6 of the fabricated floor node of the present invention

Fig. 14 is an exploded view of unit 7 of the prefabricated floor slab node of the present invention

Fig. 15 is an exploded view of the assembled floor node 8 units of the present invention

Fig. 16 is an exploded view of unit 1 of the prefabricated floor assembly node of the present invention

Fig. 17 is an exploded view of unit 2 of the prefabricated floor assembly node of the present invention

Fig. 18 is an exploded view of unit 3 of the prefabricated floor assembly node of the present invention

Fig. 19 is an exploded view of unit 4 of the prefabricated floor assembly node of the present invention

Fig. 20 is an exploded view of unit I of the assembled floor column base of the present invention

Fig. 21 is an exploded view of unit II of the assembled floor column seat of the present invention

Fig. 22 is an exploded view of unit III of the assembled floor column base of the present invention

Fig. 23 is an exploded view of unit IV of the assembled floor pedestal of the present invention

Figure 24 is an exploded view of unit V of the assembled floor column seat of the present invention

Figure 25 is an exploded view of the assembled flange column I unit of the present invention

Figure 26 is an exploded view of the assembled flange column II unit of the present invention

Figure 27 is an exploded view of the assembled flange column III unit of the present invention

Fig. 28 is a schematic diagram of the opening of the beam in the prefabricated floor slab of the present invention

Figure 29 is a schematic view of the prestressed eccentric support member of the present invention

Fig. 30 is a schematic diagram of prestressed eccentric support structure form 1 of the present invention

Figure 31 is a schematic diagram of the prestressed eccentric support structure form 2 of the present invention

Fig. 32 is a schematic diagram of prestressed eccentric support structure form 3 of the present invention

Fig. 33 is a schematic diagram of the prestressed eccentric support structure form 4 of the present invention

Fig. 34 is a schematic diagram of prestressed eccentric support structure form 5 of the present invention

Fig. 35 is an exploded view of node connection 1 of the prestressed eccentric support structure of the present invention

Fig. 36 is an exploded view of node connection 2 of the prestressed eccentric support structure of the present invention

Fig. 37 is an exploded view of node connection 3 of the prestressed eccentric support structure of the present invention

Figure 38 is an assembly effect diagram of the multi-story assembled steel structure prestressed eccentric support system of the present invention

Specific implementation

The present invention is described in detail below in conjunction with accompanying drawing:

As shown in accompanying drawing 1, the splicing position of the prefabricated floor slab of the present invention is set at a place in the main beam where the shear force and bending moment are relatively small. From the perspective of structural mechanics, the setting of the splicing position is very reasonable.

As shown in Figure 2-38, 1—short main beam Ⅰ, 2—long main beam Ⅰ, 3—side secondary beam, 4—middle secondary beam, 5—connecting plate I, 6—floor slab, 7—column seat Ⅰ , 8—column seat II, 9—column seat III, 10—column seat IV, 11—short main beam II, 12—long main beam II, 13—column seat V, 14—flange plate I, 15—square steel pipe Ⅰ, 16—connecting plate Ⅱ, 17—connecting plate Ⅲ, 18—square steel pipe Ⅱ, 19—flange plate Ⅱ, 20—flange column Ⅰ, 21—flange plate Ⅲ, 22—flange column Ⅱ, 23— Flange plate IV, 24—flange column III, 25—connecting plate IV, 26—connecting plate V, 27—prestressed eccentric support, 28—ear plate I, 29—ear plate II.

In the multi-high-rise assembled steel structure prestressed eccentric support system proposed by the present invention, the multi-high-rise assembled steel structure eccentric support system is composed of assembled floor slabs, assembled prestressed eccentric supports and assembled flange columns using bolts. The prefabricated floor is spliced by three kinds of prefabricated floors A, B and C.

In the prestressed eccentric support system of multi-high-rise assembled steel structure proposed by the present invention, the A plate is composed of short main beam I1, long main beam I2, side secondary beam 3, middle secondary beam 4, connecting plate I5, floor slab 6, column It consists of seat I7, column seat II8, connection plate IV25 and connection plate V26; all components of the A plate are processed and manufactured in the factory, and then assembled into the prefabricated floor A by welding and bolt connection. The short main beam Ⅰ1 and the side secondary beam 3 are placed vertically, and the short main beam Ⅰ1 and the side secondary beam 3 are connected through the column base Ⅰ7 and the connecting plate I5. The upper and lower flange plates Ⅰ14 of the column base Ⅰ7 are respectively connected with the short main beam Ⅰ1 and The upper and lower flanges of the side and secondary beams 3 are flush, and the two sides of the connecting plate I5 are respectively connected with the short main beam I1 and the flanges of the side and secondary beams 3, and the two connecting plates I5 are respectively connected to the upper and lower wings On the edge, all the connection parts are welded; the two short main beams I1 are placed on the same straight line and connected by the column base II8, the upper and lower flange plates I14 of the column base II8 are respectively connected to the upper and lower wings of the two short main beams I1 The edges are flush, and all the connection parts are welded; the middle secondary beam 4 is parallel to the side secondary beam 3, perpendicular to the two short main beams I1, and connected to the two short main beams I1 through the column seat II8 and the connecting plate I5. The upper and lower flange plates I14 of the column seat II8 are respectively flush with the upper and lower flanges of the middle secondary beam 4, and the two sides of the connecting plate I5 are respectively connected with the flanges of the short main beam I1 and the middle secondary beam 4, and the two pieces are connected The plate I5 is connected to the upper flange and the lower flange respectively, and all the connection parts are welded; the long main beam I2 is parallel to the two short main beams I1, perpendicular to the two side beams 3 and the middle beam 4, Connect the two side beams 3 and the middle beam 4 through the connecting plate I5, connecting plate IV25 and connecting plate V26; the connecting plate IV25 is located at the end of the side beam 3, and the upper and lower ends of the connecting plate IV25 are connected The flanges of the beam 3 are connected, and one side is connected with the web of the side secondary beam 3; the connecting plate V26 is a rectangular steel plate, one side of which is connected with the web of the middle secondary beam 4 in parallel, and the other three sides are connected with the long main beam respectively. The flange of the beam I2 is connected to the web; the two sides of the connecting plate I5 connect the flange of the long main beam I2 and the side secondary beam 3, and the flange connecting the long main beam I2 and the middle secondary beam 4, the connecting plate I5 is respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the floor 6 is placed on the plane surrounded by each beam, and the floor 6 is connected to each beam by pegs.

In the prestressed eccentric support system of multi-high-rise assembled steel structure proposed by the present invention, the B plate is connected by long main beam I2, side secondary beam 3, middle secondary beam 4, connecting plate I5, floor slab 6, short main beam II11, Plate IV25 and connecting plate V26; all the components of the B plate are processed and manufactured in the factory, and then the components are assembled into the prefabricated floor B through welding and bolt connection. The short main beam II11 and the side and secondary beams 3 are vertically placed, and the short main beam II11 and the side and secondary beams 3 are connected through the connecting plate I5 and the connecting plate IV25. The connecting plate IV25 is located at the end of the side and secondary beams 3, and the connecting plate The upper and lower ends of IV25 are connected to the flange of the side and secondary beam 3, and one side is connected to the web of the side and secondary beam 3, and the two sides of the connecting plate I5 are respectively connected to the flange of the short main beam II11 and the side and secondary beam 3 The two connecting plates I5 are respectively connected to the upper flange and the lower flange, and all the connecting parts are welded; the two short main beams II11 are placed on the same straight line without direct connection; the middle secondary beam 4 and The side secondary beam 3 is parallel to and perpendicular to the two short main beams II11, and connected to the two short main beams II11 through the connection plate I5 and the connection plate IV25. The upper and lower ends of the connection plate IV25 are connected to the flange of the beam, and one side is connected to the web of the beam; the two sides of the connection plate I5 are respectively connected to the flange of the short main beam II11 and the middle secondary beam 4, The connection plate I5 is connected to the upper flange and the lower flange respectively, and all the connection parts are welded; the long main beam I2 is parallel to the two short main beams II11, perpendicular to the two side beams 3 and the middle beam 4, Connect the two side beams 3 and the middle beam 4 through the connecting plate I5, connecting plate IV25 and connecting plate V26, the connecting plate IV25 is located at the end of the side beam 3, the upper and lower ends of the connecting plate IV25 are connected to the The flanges of the beam 3 are connected, and one side is connected with the web of the side secondary beam 3; the connecting plate V26 is a rectangular steel plate, one side of which is connected with the web of the middle secondary beam 4 in parallel, and the other three sides are connected with the long main beam respectively. The flange of the beam I2 is connected to the web; the two sides of the connecting plate I5 connect the flange of the long main beam I2 and the side secondary beam 3, and the flange connecting the long main beam I2 and the middle secondary beam 4, the connecting plate I5 is respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the floor 6 is placed on the plane surrounded by each beam, and the floor 6 is connected to each beam by pegs.

In the multi-high-rise assembled steel structure prestressed eccentric support system proposed by the present invention, the C plate is composed of side secondary beams 3, middle secondary beams 4, connecting plates I5, floor slabs 6, column bases III9, column bases IV10, short main beams II11, long main beam II12, connecting plate IV25 and connecting plate V26; all components of the C plate are processed and manufactured in the factory, and then assembled into the prefabricated floor C by welding and bolt connection. The short main beam II11 and the side secondary beam 3 are vertically placed, and the short main beam II11 and the side secondary beam 3 are connected through the column base III9 and the connecting plate I5, and the upper and lower flange plates I14 of the column base III9 are respectively connected with the short main beam II11 and the The upper and lower flanges of the side and secondary beams 3 are flush, and the two sides of the connecting plate I5 are respectively connected with the short main beam II11 and the flanges of the side and secondary beams 3, and the two connecting plates I5 are respectively connected to the upper and lower wings On the edge, all the connection parts are welded; the two short main beams II11 are placed on the same straight line and connected through the column base IV10. The edges are flush, and all the connection parts are welded; the middle secondary beam 4 is parallel to the side secondary beam 3, perpendicular to the two short main beams Ⅱ11, and connected to the two short main beams Ⅱ11 through the column base Ⅳ10 and the connecting plate I5. The upper and lower flange plates I14 of the column base IV10 are respectively flush with the upper and lower flanges of the middle secondary beam 4, and the two sides of the connecting plate I5 are respectively connected with the flanges of the short main beam I1 and the middle secondary beam 4. The plate I5 is connected to the upper flange and the lower flange respectively, and all the connection parts are welded; the long main beam II12 is parallel to the two short main beams II11, perpendicular to the two side beams 3 and the middle beam 4, Connect the two side beams 3 and the middle beam 4 through the connecting plate I5, connecting plate IV25 and connecting plate V26, the connecting plate IV25 is located at the end of the side beam 3, the upper and lower ends of the connecting plate IV25 are connected to the The flanges of the beam 3 are connected, and one side is connected with the web of the side secondary beam 3; the connecting plate V26 is a rectangular steel plate, one of which is connected to the web of the middle secondary beam 4, and the other three sides are respectively connected with the long main beam The flange of II12 is connected to the web; the two sides of the connecting plate I5 connect the flange of the long main beam II12 and the side secondary beam 3, and the flange connecting the long main beam II12 and the middle secondary beam 4, the connecting plate I5 They are respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the floor 6 is placed on the plane surrounded by each beam, and the floor 6 is connected to each beam by studs.

In the prestressed eccentric support system of multi-story assembled steel structure proposed by the present invention, the column base includes four types of column bases, namely column base I7, column base II8, column base III9 and column base IV10; column base V13 It consists of two flange plates I14 and a square steel pipe I15, and the two flange plates I14 are respectively located on the two ends of the square steel pipe I15, and all connections are welded; the column base I7 is composed of column base V13 and two The two connecting plates II16 are respectively located on the central axis of the two adjacent outer surfaces of the column seat V13, and are connected with the flange plate I14 and the square steel pipe I15; the connecting plate II16 is a rectangular steel plate, parallel to The two faces of the flange plate I14 are respectively connected with the upper and lower flange plates I14, perpendicular to the two parallel faces of the flange plate I14, one is connected with the square steel pipe I15, and the other is flush with the outer edge of the flange plate I14, all The connections are all welded. The column base II8 is composed of a column base V13 and three connecting plates II16, and the three connecting plates II16 are respectively located on the central axes of the three outer surfaces of the column base V13, and are connected with the flange plate I14 and the square steel pipe I15; The connection plate II16 is a rectangular steel plate, the two faces parallel to the flange plate I14 are respectively connected with the upper and lower flange plates I14, and the two parallel faces perpendicular to the flange plate I14, one is connected with the square steel pipe I15, and the other is connected with the flange plate I15. The outer edge of the blue plate I14 is flush, and all connections are welded. The column base III9 is composed of a column base V13, two connecting plates II16 and three connecting plates III17, the connecting plates II16 and connecting plates III17 are arranged on three adjacent outer surfaces, and two connecting plates are arranged on the first surface. Plate III17 is symmetrically arranged along the central axis of the surface, the second surface is adjacent to the first surface, a connecting plate III17 and a connecting plate II16 are arranged on the second surface, and the connecting plate is arranged on the side close to the first surface III17, the connecting plate II16 is arranged at the central axis of the surface, the third surface is adjacent to the second surface, and a connecting plate II16 is arranged on the third surface, located at the central axis of the surface. The connecting plate II16 is a rectangular steel plate, the two faces parallel to the flange plate I14 are respectively connected with the upper and lower flange plates I14, the two parallel faces perpendicular to the flange plate I14, one is connected with the square steel pipe I15, and the other is connected with the square steel pipe I15. It is flush with the outer edge of the flange plate I14, and all connections are welded. The connecting plate III17 is an angle steel or channel steel, the upper and lower sections are respectively connected with the upper and lower flange plates I14, the outer surface is flush with the outer edge of the flange plate I14, and all connections are welded. The column base IV10 is composed of a column base V13, three connecting plates II16 and four connecting plates III17, the connecting plates II16 and connecting plates III17 are respectively arranged on four surfaces, and two connecting plates III17 are arranged on the first surface, Arranged symmetrically along the central axis of the surface, the second surface is adjacent to the first surface, a connecting plate III17 and a connecting plate II16 are arranged on the second surface, and the connecting plate III17 is arranged on the side close to the first surface. The connecting plate II16 is arranged at the central axis of the surface, the third surface is adjacent to the second surface, and a connecting plate II16 is arranged on the third surface, which is located at the central axis of the surface. The fourth surface is connected to the third surface and The first surface is adjacent, and a connecting plate III17 and a connecting plate II16 are arranged on the fourth surface. The connecting plate III17 is arranged on the side close to the first surface, and the connecting plate II16 is arranged on the central axis of the surface. The connecting plate II16 is a rectangular steel plate, the two faces parallel to the flange plate I14 are respectively connected with the upper and lower flange plates I14, the two parallel faces perpendicular to the flange plate I14, one is connected with the square steel pipe I15, and the other is connected with the square steel pipe I15. It is flush with the outer edge of the flange plate I14, and all connections are welded. The connecting plate III17 is an angle steel or channel steel, the upper and lower sections are respectively connected with the upper and lower flange plates I14, the outer surface is flush with the outer edge of the flange plate I14, and all connections are welded.

In the prestressed eccentric support system of the multi-story assembled steel structure proposed by the present invention, the assembled flange column includes three types of assembled flange columns, namely flange column I20, flange column II22 and flange column Ⅲ24; the flange column I20 is composed of a square steel pipe Ⅱ18 and two flange plates Ⅱ19, and the two flange plates Ⅱ19 are respectively located on the two ends of the square steel pipe Ⅱ18, and all connections are welded; the flange The plate II19 includes the bolt holes in the middle and the bolt holes in the extensions on the adjacent two sides, and the bolt holes in the middle correspond to the bolt holes in the flange plate I14. The flange column II22 is composed of a square steel pipe II18 and two flange plates III21, the two flange plates III21 are respectively located on the two ends of the square steel pipe II18, and all connections are welded; the flange plate III21 The section form of the flange can be diversified, including the bolt holes in the middle and the bolt holes in the three-side extensions. The bolt holes in the middle correspond to the bolt holes in the flange plate I14. The flange column III24 is composed of a square steel pipe II18 and two flange plates IV23, and the two flange plates IV23 are respectively located on the two ends of the square steel pipe II18, and all connections are welded; the flange plate IV23 The cross-sectional form of the flange can be diversified, including the bolt holes in the middle and the bolt holes in the four side extensions. The bolt holes in the middle correspond to the bolt holes in the flange plate I14. The flange plate Ⅱ19, flange plate Ⅲ21 and flange plate Ⅳ23 include the bolt holes in the middle part and the bolt holes in the overhang part. The role of the beam is to connect it to the beam by using bolts, so that the beam-column joint can achieve the effect of rigid connection, and at the same time, the end plate of the overhang also plays the role of supporting the upper floor. The flange column I20 is connected with the column base I7 and adjacent beams in the assembled floor system after splicing, and all connections are connected by bolts; the flange column II22 is connected in the assembled floor system after splicing , to connect with column base Ⅱ8, column base Ⅲ9 and adjacent beams, and all connections are bolted; the flange column Ⅲ24 is connected with column base Ⅳ10 and adjacent beams in the prefabricated floor system after splicing All connections are bolted.

In the prestressed eccentric support system of the multi-story prefabricated steel structure proposed by the present invention, the prefabricated floor slab A and the prefabricated floor slab B are spliced, and the splicing method is to combine the long main beam I2 of the A slab and the B slab The long girder I2 is spliced, and the splicing position is at least the end of the long girder I2 of the plate A and the long girder I2 of the B plate, and a quarter of the middle part. All the splicing uses bolts for on-site splicing; the assembly The B-type floor slab is spliced with the prefabricated floor C-slab. One splicing method is to connect the side beam 3, the middle beam 4 and the short main beam II11 of the B-slab with the column base III9, the column base IV10 and the C-slab. The short main beam II11 is spliced, and the splicing position is at least the side beam 3 of the B plate and the column base III9 of the C plate, the middle secondary beam 4 of the B plate is spliced with the column base IV10 of the C plate, and the short main beam II11 of the B plate Splice with column base Ⅲ9 and column base Ⅳ10 of C plate, short main beam Ⅱ11 of B plate and short main beam Ⅱ11 of C plate are spliced at the end and middle of short main beam Ⅱ11, and all splices are carried out on site with bolts Splicing; the prefabricated floor B is spliced with the prefabricated floor C, and another splicing method is to splice the long main beam II12 of C plate and the long main beam I2 of B plate, and the splicing position is at least C The end of the long main beam II12 of the slab and the end of the long main beam I2 of the B slab, and the middle quarter, all the splicing uses bolts for on-site splicing. The C-slab of the prefabricated floor is spliced with the A-slab of the prefabricated floor. The splicing method is to splice the long main beam II12 of the C-slab and the long main beam I2 of the A-slab, and the splicing position is at least the long main beam of the C-slab At the end of the long main beam I2 of Ⅱ12 and plate A, and at the middle quarter, all the splicing shall be spliced on site with bolts.

In the multi-high-rise assembled steel structure prestressed eccentric support system proposed by the present invention, the basic constituent units of the assembled floor system are A plate, B plate and C plate, and the two ends of the assembled floor system are A plate units, and the middle Alternate splicing units for boards B and C.

The multi-story prefabricated steel structure prestressed eccentric support system proposed by the present invention is characterized in that the two ends of the prestressed eccentric support 27 are prestressed cable heads, and the middle part adopts prestressed cables or prestressed steel tie rods; The ends of the lug plate I28 and lug plate II29 include flange plates, and the lug plate I28 and lug plate II29 are connected to the joints of beams and columns by using bolts, or at the flanges of beams, and the prestressed eccentric support 27 passes through the prestressed The stress cable head is connected with the ear plate I28 and the ear plate II29 to form a prestressed eccentric support structure system as a whole.

The prestressed eccentric support system of the multi-story assembled steel structure of the present invention completely adopts bolts for on-site assembly, cancels the traditional on-site welding method and concrete pouring method, effectively guarantees the construction quality, and completely avoids the problems caused by concrete pouring and steel welding. Environmental pollution, to achieve the site construction "no water, no fire, no dust" three standards, reducing the occurrence of fire and other hazardous accidents. When the components are dismantled, the present invention can efficiently recycle, reduce construction waste, truly realize the concept of green environmental protection, and is a green and sustainable steel structure system.

Claims (3)

1. The prestressed eccentric support system of multi-high-rise assembled steel structure is characterized in that, the pre-stressed eccentric support system of multi-high-rise assembled steel structure is composed of assembled floor slabs, assembled prestressed eccentric supports and assembled flange columns. Assembled by bolts; the prefabricated floor is spliced by three kinds of prefabricated floors A, B and C; The A plate consists of short main beam I (1), long main beam I (2), side secondary beam (3), middle secondary beam (4), connection plate I (5), floor slab (6), column base I (7), column base II (8), connecting plate IV (25) and connecting plate V (26); all components of the described A plate are all processed and manufactured in the factory, and then each component is connected by welding and bolts Assembled into the prefabricated floor A; the short main beam I (1) and the side beams (3) are placed vertically, and the short main beam I (1) and the The side and secondary beams (3) are connected, and the upper and lower flange plates I (14) of the column base I (7) are respectively flush with the upper and lower flanges of the short main beam I (1) and the side and secondary beams (3). The two sides of the plate I(5) are respectively connected to the flanges of the short main beam I(1) and the side secondary beam(3), and the two connecting plates I(5) are connected to the upper flange and the lower flange respectively, All the connection parts are welded; two short main girders Ⅰ (1) are placed on the same straight line, connected by column base Ⅱ (8), and the upper and lower flange plates Ⅰ (14) of column base Ⅱ (8) are respectively connected with The upper and lower flanges of the two short main beams I (1) are flush, and all the connection parts are welded; the middle secondary beam (4) is parallel to the side secondary beams (3), and the two short main beams I (1) Vertical, connected to two short main beams I (1) through the column base II (8) and the connecting plate I (5), the upper and lower flange plates I (14) of the column base II (8) are respectively connected to the middle secondary beam (4 ) are flush with the upper and lower flanges, the two sides of the connecting plate I (5) are respectively connected with the flanges of the short main beam I (1) and the middle secondary beam (4), and the two connecting plates I (5) are respectively It is connected to the upper flange and the lower flange, and all the connection parts are welded; the long main beam I (2) is parallel to the two short main beams I (1), perpendicular to the two side beams (3) and The middle secondary beam (4) is connected with the two side secondary beams (3) and the middle secondary beam (4) through the connecting plate I (5), the connecting plate IV (25) and the connecting plate V (26); Plate IV (25) is located at the end of the side beam (3), the upper and lower ends of the connecting plate IV (25) are connected to the flange of the side beam (3), and one side is connected to the web of the side beam (3). Connected; the connecting plate V (26) is a rectangular steel plate, one of which is connected to the web of the middle secondary beam (4) in parallel, and the other three sides are respectively connected to the flange and the web of the long main beam I (2); The two sides of the connecting plate I (5) connect the flange of the long main beam I (2) and the side secondary beam (3), and the flange connecting the long main beam I (2) and the middle secondary beam (4) , the connecting plate I (5) is connected to the upper flange and the lower flange respectively, and all the connecting parts are welded; the floor (6) is placed on the plane surrounded by each beam, and the floor (6 ) connected to each beam; The B plate is composed of long main beam I (2), side secondary beam (3), middle secondary beam (4), connecting plate I (5), floor slab (6), short main beam II (11), connecting plate IV (25) and connecting plate V (26); all components of the B plate are processed and manufactured in the factory, and then each component is assembled into the prefabricated floor B by welding and bolt connection; the short main beam II ( 11) and the side and secondary beams (3) are placed vertically, and the short main beam II (11) and the side and secondary beams (3) are connected through the connecting plate I (5) and the connecting plate IV (25), and the connecting plate IV (25) is located at the end of the side beam (3), the upper and lower ends of the connecting plate IV (25) are connected with the flange of the side beam (3), and one side is connected with the web of the side beam (3), The two sides of the connecting plate I (5) are respectively connected to the flanges of the short main beam II (11) and the side secondary beam (3), and the two connecting plates I (5) are respectively connected to the upper flange and the lower wing On the edge, all the connection parts are welded; the two short main beams II (11) are placed on the same straight line without direct connection; the middle secondary beam (4) is parallel to the side secondary beams (3), and the two The short main beam II (11) is vertical and connected to two short main beams II (11) through the connection plate I (5) and the connection plate IV (25). ) and the end of the short main beam II (11), the upper and lower ends of the connecting plate IV (25) are connected with the flange of the beam, and one side is connected with the web of the beam; the two ends of the connecting plate I (5) The sides are respectively connected to the flanges of the short main beam II (11) and the middle secondary beam (4), and the connecting plate I (5) is respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the long main beam Beam I (2) is parallel to the two short main beams II (11), perpendicular to the two side beams (3) and the middle beam (4), passing through the connecting plate I (5), connecting plate IV (25) and The connection plate V (26) is connected with the two side beams (3) and the middle beam (4), the connection plate IV (25) is located at the end of the side beam (3), and the connection plate IV (25) The upper and lower ends of the upper and lower ends are connected with the flange of the side secondary beam (3), and one side is connected with the web of the side secondary beam (3); the connecting plate V (26) is a rectangular steel plate, one side of which is connected with the middle secondary beam (4 ) is connected in parallel with the web, and the other three sides are respectively connected with the flange and web of the long girder I (2); the two sides of the connecting plate I (5) are connected with the long girder I (2) and the edge The flange of the secondary beam (3), and the flange connecting the long main beam I (2) and the middle secondary beam (4), the connecting plate I (5) are respectively connected to the upper flange and the lower flange, and all connections The parts are all welded; the floor slab (6) is placed on the plane surrounded by each beam, and the floor slab (6) is connected to each beam by studs; The C plate consists of side secondary beams (3), middle secondary beams (4), connecting plate I (5), floor slab (6), column base III (9), column base IV (10), short main beam II ( 11), long main beam II (12), connection plate IV (25) and connection plate V (26); all components of the C plate are processed and manufactured in the factory, and then each component is connected by welding and bolts Assembled into the prefabricated floor C; the short main beam II (11) and the side secondary beam (3) are placed vertically, and the short main beam II (11) and the The side and secondary beams (3) are connected, and the upper and lower flange plates I (14) of the column base III (9) are respectively flush with the upper and lower flanges of the short main beam II (11) and the side and secondary beams (3). The two sides of the plate I (5) are respectively connected to the flanges of the short main beam II (11) and the side secondary beam (3), and the two connecting plates I (5) are respectively connected to the upper flange and the lower flange, All the connection parts are welded; the two short main girders II (11) are placed on the same straight line and connected through the column base IV (10), and the upper and lower flange plates I (14) of the column base IV (10) are respectively connected to The upper and lower flanges of the two short main beams II (11) are flush, and all the connection parts are welded; the middle secondary beam (4) is parallel to the side secondary beams (3), and the two short main beams II (11) Vertical, connected to two short main beams II (11) through the column base IV (10) and the connecting plate I (5), the upper and lower flange plates I (14) of the column base IV (10) are respectively connected to the middle secondary beam (4 ) are flush with the upper and lower flanges, the two sides of the connecting plate I (5) are respectively connected with the flanges of the short main beam I (1) and the middle secondary beam (4), and the two connecting plates I (5) are respectively It is connected to the upper flange and the lower flange, and all the connection parts are welded; the long main beam II (12) is parallel to the two short main beam II (11), and perpendicular to the two side secondary beams (3) and The middle secondary beam (4) is connected with the two side secondary beams (3) and the middle secondary beam (4) through the connecting plate I (5), the connecting plate IV (25) and the connecting plate V (26). Plate IV (25) is located at the end of the side beam (3), the upper and lower ends of the connecting plate IV (25) are connected to the flange of the side beam (3), and one side is connected to the web of the side beam (3). connected; the connecting plate V (26) is a rectangular steel plate, one of which is connected to the web of the middle secondary beam (4), and the other three sides are respectively connected to the flange and the web of the long main beam II (12); The two sides of the connecting plate I (5) connect the flange of the long main beam II (12) and the side secondary beam (3), and the flange connecting the long main beam II (12) and the middle secondary beam (4), The connecting plate I (5) is connected to the upper flange and the lower flange respectively, and all the connecting parts are welded; the floor (6) is placed on the plane surrounded by each beam, and the floor (6) is fixed by studs. connected to each beam; The column base includes four types of column bases, which are respectively column base I (7), column base II (8), column base III (9) and column base IV (10); column base V (13) consists of two A flange plate I (14) and a square steel pipe I (15), the two flange plates I (14) are located on the two ends of the square steel pipe I (15), and all connections are welded; The column base I (7) is composed of a column base V (13) and two connecting plates II (16), and the two connecting plates II (16) are respectively located on the two outer surfaces adjacent to the column base V (13). On the central axis, it is connected with the flange plate I (14) and the square steel pipe I (15); the connecting plate II (16) is a rectangular steel plate, and the two faces parallel to the flange plate I (14) are connected with the upper and lower sides respectively. The flange plate I (14) is connected, perpendicular to the two parallel faces of the flange plate I (14), one is connected with the square steel pipe I (15), the other is flush with the outer edge of the flange plate I (14), All connections are welded; The column base II (8) is composed of a column base V (13) and three connecting plates II (16), and the three connecting plates II (16) are respectively located on the central axes of the three outer surfaces of the column base V (13). connected to the flange plate I (14) and the square steel pipe I (15); the connecting plate II (16) is a rectangular steel plate, and the two faces parallel to the flange plate I (14) are respectively connected to the upper and lower flanges. Plate I (14) connection, two parallel faces perpendicular to flange plate I (14), one connected with square steel pipe I (15), one flush with the outer edge of flange plate I (14), all connections Welding is used; The column base III (9) is composed of a column base V (13), two connecting plates II (16) and three connecting plates III (17), and the connecting plates II (16) and connecting plates III (17) are arranged on On the three adjacent outer surfaces, two connecting plates III (17) are arranged on the first surface, symmetrically arranged along the central axis of the surface, the second surface is adjacent to the first surface, and one is arranged on the second surface. Connecting plate III (17) and a connecting plate II (16), the connecting plate III (17) is arranged on the side close to the first surface, the connecting plate II (16) is arranged on the central axis of the surface, and the third surface Adjacent to the second surface, a connecting plate II (16) is arranged on the third surface, located at the central axis of the surface; the connecting plate II (16) is a rectangular steel plate, parallel to the flange plate I (14 ) are respectively connected with the upper and lower flange plates I (14), perpendicular to the two parallel faces of the flange plate I (14), one is connected with the square steel pipe I (15), and the other is connected with the flange plate I ( 14) are flush with the outer edges, and all connections are welded; the connecting plate III (17) is an angle steel or channel steel, the upper and lower sections are respectively connected with the upper and lower flange plates I (14), and the outer surface is connected with the flange plate I (14) The outer edges are flush and all connections are welded; The column base IV (10) is composed of column base V (13), three connecting plates II (16) and four connecting plates III (17), and the connecting plates II (16) and connecting plates III (17) are respectively arranged On the four faces, two connecting plates III (17) are arranged on the first face, symmetrically arranged along the central axis of the face, the second face is adjacent to the first face, and a connecting plate III is arranged on the second face (17) and a connecting plate II (16), the connecting plate III (17) is arranged on the side close to the first surface, and the connecting plate II (16) is arranged on the central axis of the surface, and the third surface and the second The first surface is adjacent, and a connecting plate II (16) is arranged on the third surface, which is located at the central axis of the surface. The fourth surface is adjacent to the third surface and the first surface, and a connecting plate II (16) is arranged on the fourth surface. Connecting plate III (17) and a connecting plate II (16), the connecting plate III (17) is arranged on the side close to the first surface, and the connecting plate II (16) is arranged at the central axis of the surface; the connecting plate II (16) is a rectangular steel plate, the two faces parallel to the flange plate I (14) are respectively connected with the upper and lower flange plates I (14), perpendicular to the two parallel faces of the flange plate I (14), One is connected with the square steel pipe I (15), the other is flush with the outer edge of the flange plate I (14), and all connections are welded; the connecting plate III (17) is an angle steel or channel steel, and the upper and lower sections are respectively connected with the flange plate I (14). The upper and lower flange plates Ⅰ (14) are connected, the outer surface is flush with the outer edge of the flange plate Ⅰ (14), and all connections are welded; The assembled flange column includes three types of assembled flange column, namely flange column I (20), flange column II (22) and flange column III (24); The flange column I (20) is composed of a square steel pipe II (18) and two flange plates II (19), and the two flange plates II (19) are respectively located at two ends of the square steel pipe II (18). On the head, all connections are welded; the flange plate II (19) includes the bolt holes in the middle and the bolt holes in the extensions on the adjacent two sides, and the bolt holes in the middle correspond to the bolt holes in the flange plate I (14); The flange column II (22) is composed of a square steel pipe II (18) and two flange plates III (21), and the two flange plates III (21) are respectively located at two ends of the square steel pipe II (18). On the head, all connections are welded; the cross-sectional form of the flange plate III (21) can be diversified, including the bolt holes in the middle part and the bolt holes in the three-side extensions, and the bolt holes in the middle part and the flange plate I (14) corresponding to the bolt holes; The flange column III (24) is composed of a square steel pipe II (18) and two flange plates IV (23), and the two flange plates IV (23) are respectively located at two ends of the square steel pipe II (18). On the head, all connections are welded; the cross-sectional form of the flange plate IV (23) can be diversified, including the bolt holes in the middle part and the bolt holes in the four side extensions, and the bolt holes in the middle part and the bolt holes of the flange plate I (14) Corresponding bolt holes; The flange plate II (19), flange plate III (21) and flange plate IV (23) include the bolt hole in the middle part and the bolt hole in the overhang part, and the function of the bolt hole in the middle part is to connect it with the bolt hole by using bolts. The column base is connected, and the function of the bolt hole in the overhang is to connect it with the beam by using bolts, so that the beam-column node can achieve the effect of rigid connection, and the end plate of the overhang also plays the role of supporting the upper floor; the flange In the prefabricated floor system after splicing, column I (20) is connected with column base I (7) and adjacent beams, and all connections are connected by bolts; the flange column II (22) after splicing In the prefabricated floor system, it is connected with the column base II (8), column base III (9) and adjacent beams, and all connections are bolted; the assembled flange column III (24) after splicing In the floor slab system, it is connected with the column base IV (10) and adjacent beams, and all connections are bolted; The prefabricated floor plate A is spliced with the prefabricated floor plate B, and the splicing method is to splice the long main beam I (2) of the A plate and the long main beam I (2) of the B plate, and the splicing position is at least At the end, middle or quarter of the long main beam I (2) of plate A and the long main beam I (2) of plate B, all the splicing shall be spliced on site with bolts; The prefabricated floor slab B is spliced with the prefabricated floor slab C. One splicing method is to connect the side secondary beam (3), the middle secondary beam (4) and the short main beam II (11) of the B slab to the C The column base III (9), column base IV (10) of the slab and the short main beam II (11) are spliced, and the splicing position is at least the splicing of the side beam (3) of the B plate and the column base III (9) of the C plate , the middle secondary beam (4) of plate B is spliced with the column seat IV (10) of plate C, and the short main beam II (11) of plate B is spliced with the column seat III (9) and column seat IV (10) of plate C Splicing, the short main beam II (11) of the B plate and the short main beam II (11) of the C plate are spliced at the end and middle of the short main beam II (11), and all the splicing is carried out on-site with bolts; The prefabricated floor B board is spliced with the prefabricated floor C board, and another splicing method is to splice the long main beam II (12) of C board and the long main beam I (2) of B board, splicing The position is at least at the end, middle or quarter of the long main girder II (12) of the C plate and the long main girder I (2) of the B plate, and all the splicing shall be spliced on site with bolts; The prefabricated floor C plate is spliced with the prefabricated floor A plate, and the splicing method is to splice the long main beam II (12) of C plate and the long main beam I (2) of A plate, and the splicing position is at least At the end, middle or quarter of the long main beam II (12) of the C plate and the long main beam I (2) of the A plate, all splicing shall be spliced on site with bolts; The basic constituent units of the prefabricated floor system are A board, B board and C board, the two ends of the prefabricated floor system are A board units, and the middle part is B board and C board alternate splicing unit; The two ends of the prestressed eccentric support (27) are prestressed cable heads, and the middle part adopts prestressed cables or prestressed steel tie rods; For the blue plate, the lug plate I (28) and lug plate II (29) are connected to the beam-column node or the flange of the beam by using bolts, and the prestressed eccentric support (27) passes through the prestressed cable head and the lug plate I (28) is connected with lug plate II (29) to form a prestressed eccentric support structure system as a whole. the 2. The prestressed eccentric support system of multi-story prefabricated steel structure according to claim 1, characterized in that, the short main girder I (1) is H-shaped steel, or two channel steel spliced back to back, etc. The effective H-shaped steel, or the equivalent H-shaped steel spliced by two T-shaped steels, or the equivalent H-shaped steel spliced by four angle steels; the long main beam I (2) is a channel steel, or two An equivalent channel steel formed by splicing angle steels; the side beam (3) is an H-shaped steel, or an equivalent H-shaped steel formed by splicing two channel steels back to back, or an equivalent H-shaped steel formed by splicing two T-shaped steels. H-shaped steel, or an equivalent H-shaped steel spliced by four angle steels; the middle secondary beam (4) is an H-shaped steel, or an equivalent H-shaped steel formed by splicing two channel steel back-to-back, or two T The equivalent H-shaped steel spliced by section steel, or the equivalent H-shaped steel spliced by four angle steels; the short main girder II (11) is a channel steel, or an equivalent channel steel spliced by two angle steels ; The long main beam II (12) is a channel steel, or an equivalent channel steel formed by splicing two angle steels. the 3. The multi-story prefabricated steel structure prestressed eccentric support system according to claim 1, characterized in that all the beams are shaped steel beams, or openings are provided at the webs of the beams to facilitate the passage of various pipelines open beam. the