CN106869317A - The beam column edge of a wing is the group frame system and construction method of concrete-filled rectangular steel tube - Google Patents

Abstract

The present invention relates to a composite frame system with rectangular concrete-filled steel tube flanges and a construction method. The composite frame system with rectangular concrete-filled steel pipe flanges is composed of composite columns and composite beams connected by nodes, and the composite beams are horizontally arranged between the composite columns. Between, the joints are integral joints of steel tube concrete, the composite column is a cross-shaped or I-shaped composite column with a rectangular steel tube concrete; the composite beam is an I-shaped honeycomb beam with a rectangular steel tube concrete; the node and the composite column are in The respective connecting plates are fixedly connected by high-strength bolts, and the nodes and composite beams are also fixedly connected by high-strength bolts at their respective connecting plates. The invention solves the problems of cumbersome construction of the existing steel-concrete composite structure and poor connection and stability of the composite structures.

Description

Composite Frame System and Construction Method of Rectangular Steel Tube Concrete with Beam-column Flange

technical field

The invention relates to a house frame structure in the field of civil and architectural structures, in particular to a composite frame system and a construction method in which the flanges of beams and columns are rectangular steel pipe concrete.

Background technique

Conventional building frame structures are mostly cast-in-place welded reinforced concrete frames or steel frames, which have a long construction period, are greatly affected by the environment, and the achievable span is small, and the component bearing capacity is low, which has great limitations in practical engineering applications. sex. In recent years, with the development of buildings in the direction of faster, higher, larger span and stronger bearing capacity, conventional structural systems and construction methods are facing new challenges. People began to build structural systems with more convenient construction and stronger bearing capacity. Set the steel frame into a detachable structure, and connect different parts with bolts, and work together under the load to form a whole frame, which has high strength, convenient construction, and can be reused, making up for the defects of conventional frame structures And deficiencies, it has been widely used in plant construction for a while. However, the steel structure is less rigid and prone to overall or local instability, and most of the steel structure is composed of thin-walled section steel and slender rods, its shape is complex, and the nodes are prone to stress concentration and eccentric gravity, so In order to improve the rigidity of the frame and enhance the overall stability of the steel frame, the steel frame is combined with concrete to give full play to the advantages of both. However, when concrete and steel structures work together, there are many problems in the connection between steel structures, steel-concrete connections, and the design of beam-column joints, and the construction of steel-concrete composite structures with different cross-sectional forms is also very difficult and complicated. Yes, under strong earthquakes, beam-column joints are prone to damage, so it is imminent to construct a new structural system and determine a suitable construction method.

Contents of the invention

An object of the present invention is to provide a composite frame system in which the beam-column flanges are rectangular concrete-filled steel tubes. This composite frame system in which the beam-column flanges are rectangular steel-filled concrete composite structures is used to solve the complex construction of existing steel-concrete composite structures and the connection between composite structures. As well as the problem of poor stability, another object of the present invention is to provide a construction method for a composite frame system in which the beam-column flanges are rectangular steel tube concrete.

The technical solution adopted by the present invention to solve the technical problem is: the composite frame system with the beam-column flange as rectangular steel tube concrete is composed of composite columns and composite beams connected by joints, the composite beams are horizontally arranged between the composite columns, and the nodes are steel pipe concrete Integral joint, concrete filled steel tube integral joint is to weld the I-shaped joint end beam whose upper and lower flanges are rectangular steel pipes and the joint end column whose flange is rectangular steel pipe. The steel pipes are connected to form a steel pipe integral joint. The other end of the I-shaped joint end beam is welded with a connecting plate, and the two ends of the joint end column are respectively welded with a connecting plate. Concrete is poured in the steel pipe integral joint; the composite column has a rectangular flange For the cross-shaped or I-shaped composite column of steel pipe concrete, the two ends of the rectangular steel pipe on the flange of the composite column are respectively welded with connecting plates with reserved bolt holes to form segmental steel columns. The segmental steel columns are fixed and connected by connecting plates and then poured with concrete Composite columns are formed; composite beams are I-shaped honeycomb beams whose flanges are rectangular steel pipe concrete, and connecting plates with reserved bolt holes are welded on steel pipes at both ends of the composite beam flanges to form segmental steel beams, and the segmental steel beams are fixed by connecting plates Concrete is poured after connection to form a composite beam; the node and the composite column are fixedly connected by high-strength bolts at their respective connecting plates, and the node and the composite beam are also fixedly connected by high-strength bolts at their respective connecting plates.

In the above scheme, the composite column is an I-shaped composite column with a rectangular steel tube concrete composite column, and the joint is a T-shaped integral joint. The column is welded into one body, and the web plate of the node end column is fixedly connected with the ordinary I-shaped node end beam through high-strength bolts to form a T-shaped integral node.

In the above scheme, the segmental steel column is prefabricated in the factory, and its connecting plate is welded to the rectangular steel pipe, and the cross-shaped steel web is welded to the rectangular steel pipe to form a segmental steel column with a rectangular steel pipe flange, and the concrete is poured after being connected on site.

In the above scheme, the segmental steel beam is prefabricated in the factory, and the connecting plate is welded with the rectangular steel pipe, and the segmental steel beam with the flange of the rectangular steel pipe is formed by welding the I-shaped steel web and the rectangular steel pipe, and the concrete is poured after being connected on site.

In the above scheme, internal prestressed steel wires are arranged in the steel pipe of the lower flange of the composite beam, and tension holes are reserved on the inner side of the rectangular steel tube concrete flange of the node to realize the tension and anchorage of the prestressed steel wires, which can reduce the deflection of the beam.

In the above scheme, transverse stiffeners are arranged on the I-shaped web of the composite beam, which can increase the stability of the beam web.

In the above scheme, the prestressed tendons are arranged in the steel pipe of the lower flange of the composite beam, and tension holes are reserved for the nodes. large span.

In the above scheme, vertical stiffeners are symmetrically arranged between the rectangular steel pipe flanges of the node end columns, which can prevent large deformation of the node flanges.

The concrete in the above scheme is self-compacting fine stone concrete. After the concrete is poured, the concrete of the beams, columns and integral joints are all penetrated, and are integrated with the steel pipe after curing.

The construction method of the composite frame system in which the above-mentioned beam-column flanges are rectangular steel tube concrete:

Firstly, all required steel components are prefabricated in the factory, including short columns of steel pipes outside the combined column, integral joints of steel pipes, segmental steel columns, and segmental steel beams welded with connecting plates at one end and buried in the foundation at the other end; the connecting plates will be welded , the other end of which is buried in the foundation. The lower part of the outer steel pipe short column of the composite column is fixed to the foundation, and the upper part is about 0.5m higher than the foundation. Then this part is poured with concrete close to the connecting plate, and the lower part of the segmental steel column passes through the corresponding connecting plate Connect the steel pipe short column outside the composite column above the ground. After all the segmental steel columns are connected, concrete is poured to form a cross-shaped composite bottom column with a rectangular steel pipe concrete flange; The connecting plate and the cross-shaped composite ground floor column are reliably connected, and the segmental steel beam and the steel pipe integral node are connected by high-strength bolts. Fill the interior with concrete and ensure the connectivity of the concrete. After curing, the bottom composite frame system will be formed, and then the second layer composite frame system will be constructed successively until the top layer composite frame system.

The present invention has the following beneficial effects:

1. The present invention is composed of steel pipe concrete members, without ordinary longitudinal bars and stirrups, and the construction process is simple, greatly reducing labor force and lowering the overall cost.

2. The axial force that the present invention can withstand is relatively large. Compared with conventional steel structure columns, the cross-sectional size of the column can be significantly reduced, and excessively bloated fat columns can be avoided in the frame system.

3. Steel components such as steel pipe integral joints, segmental steel columns, and segmental steel beams of the present invention can be prefabricated in factories, and cast-in-place concrete after installation on site, greatly reducing the workload and shortening the construction period, and the overall structure has good continuity.

4. The achievable span is large. The prestress in the composite beam can be installed in different ways, which is suitable for buildings of different structural forms and different scales. The prestressed tendon is integrated into the composite beam, which can cause the beam to produce anti-arch during the construction tension process, and can be integrated with the steel tube concrete in the use stage to reduce the deformation of the composite beam, which is suitable for long-span, heavy load and the expansion of existing buildings. Under renovation works.

5. Not only can give full play to the mechanical properties of the steel, but under the action of the ultimate load, the steel in the section can enter yield in its entire section, and the concrete at the edge of the compression zone reaches the ultimate compressive strain, giving full play to the maximum energy efficiency of the steel, and can also use the rigidity of the concrete Advantages Improve the stability of the frame structure.

6. In the present invention, vertical stiffeners are arranged on the outside of the prestressed tendons, which can not only improve the buckling resistance of the column, but also protect the prestressed steel bars and ensure the overall stability and working performance of the frame structure.

7. The frame system of the present invention has good ductility, and the system has good wind resistance and earthquake resistance, and is suitable for application in complex environments such as earthquake zones.

8. In the composite beam of the present invention, the I-shaped honeycomb beam whose flange is steel pipe concrete is used, and holes are opened on the beam web, and the cross section can be circular, hexagonal or octagonal, which can not only reduce the self-weight of the beam, but also avoid Stress is concentrated, and steel is saved at the same time. The steel wire rope can pass through during construction, which is convenient for hoisting.

9. The present invention adopts self-compacting fine stone concrete, which has better working performance during concrete pouring, not only improves construction efficiency, but also improves construction quality.

10. The frame system does not need formwork in the construction process, which not only saves formwork materials, but also the construction is not restricted by conventional layer-by-layer construction, and multiple layers can be constructed at the same time.

11. The frame system is light in weight and the basic cost is low.

12. The beam-column flange steel pipe used in the present invention is filled with concrete, which is not easy to buckle, has high rigidity and high stable bearing capacity.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a plane layout diagram of the present invention;

Fig. 3 is the schematic diagram of composite column and node among the present invention;

Fig. 4 is a structural representation of a cross-shaped composite column in the present invention;

Fig. 5 is a structural schematic diagram of a cross-shaped steel pipe integral node in the present invention;

Fig. 6 is the arrangement diagram of prestressed tendons and longitudinal stiffeners among the present invention;

Fig. 7 is a partial sectional view of the node at the node end beam in the present invention;

Fig. 8 is a partial cross-sectional view of the node at the rectangular concrete filled steel tube in the present invention;

Fig. 9 is a sectional view of 1-1 in Fig. 6;

Fig. 10 is a sectional view of 2-2 in Fig. 6;

Figure 11 is a schematic structural view of Embodiment 2 of the present invention;

Fig. 12 is the structural representation of the H-shaped composite column in the invention;

Fig. 13 is a structural schematic diagram of a T-shaped steel pipe integral node in the present invention.

In the figure: 1 Composite column 2 Composite beam 3 Node 4 Node end beam 5 Node end column 6 Connecting plate 7 Composite column outer short column of steel pipe 8 Rectangular steel pipe 9 Cross-shaped steel web 10 Concrete 11 High-strength bolt 13 Prestressed tendon 14 Vertical reinforcement Ribs 15 Reserved holes 16 Anchors 17 Anchor pads 18 I-shaped steel webs 19 Bolt holes.

detailed description

Below in conjunction with accompanying drawing, the present invention will be further described:

Example 1:

As shown in Fig. 1 and Fig. 2, the composite frame system with rectangular concrete-filled steel tube flanges is composed of composite column 1 and composite beam 2 connected by node 3, composite beam 2 is horizontally arranged between composite columns 1, and node 3 is Concrete-filled steel pipe integral joint, the integral joint of concrete-filled steel pipe is to weld the I-shaped joint end beam 4 whose upper and lower flanges are rectangular steel pipes and the joint end column 5 whose flange is a rectangular steel pipe, and weld the I-shaped joint end beam 4 with the The rectangular steel pipes at the joints of the node end columns 5 are connected to form a cross-shaped steel pipe integral node. The other end of the I-shaped node end beam 4 is welded to the connecting plate 6, and the two ends of the node end column 5 are respectively welded to the connecting plate 6. High-strength bolts 11 can be connected with I-shaped composite beams and cross-shaped composite columns, and concrete 10 is poured into the beam column and node 3 at the steel pipe integral joint to form a steel pipe concrete integral joint; the composite column 1 has a rectangular flange For the cross-shaped composite column of steel pipe concrete, the two ends of the flange of the composite column 1 are respectively welded with the connecting plate 6 with reserved bolt holes 19 to form a segmental steel column. Column 1; Composite beam 2 is an I-shaped honeycomb beam with a rectangular steel pipe concrete flange. The connecting plate 6 with bolt holes 19 is welded on the steel pipes at both ends of the flange of the composite beam 2 to form a segmental steel beam. The composite beam 2 is formed by pouring concrete after the connection plate 6 is fixedly connected; the node 3 and the composite column 1 are fixedly connected by high-strength bolts 11 at the respective connection plates 6, and the node 3 and the composite beam 2 are also fixed at the respective connection plates 6. The connection is fixed by high-strength bolts 11.

The segmental steel column is prefabricated in the factory, the connecting plate 6 is welded to the rectangular steel pipe 8, and the cross-shaped steel web 9 is welded to the rectangular steel pipe 8 to form a segmental steel column with a rectangular steel pipe flange, and the concrete 10 is poured after being connected on site.

The segmental steel beam is prefabricated in the factory, the connecting plate 6 is welded to the rectangular steel pipe 8, and the I-shaped steel web 18 is welded to the rectangular steel pipe 8 to form a segmental steel beam whose flange is a rectangular steel pipe, and the concrete 10 is poured after being connected on site.

The segmental steel beam improves the traditional I-shaped steel beam, and the flange is made into the form of a rectangular steel pipe. The connecting plate 6 with bolt holes 19 is welded on the flange steel pipe at both ends of the beam to form an I-shaped flange with a rectangular steel pipe. Type segmental steel beams are reliably connected to node end beams 4 through high-strength bolts 11 after arriving at the site, and then concrete 10 is poured. The upper and lower flange steel pipes can be symmetrical or asymmetrical.

The concrete 10 is self-compacting fine stone concrete. After the concrete 10 is poured, the concrete of the beams, columns and integral joints are all connected, and are integrated with the steel pipe after curing.

The construction method of the composite frame system in which the above-mentioned beam-column flanges are rectangular steel tube concrete:

Firstly, all required steel components are prefabricated in the factory, including short columns 7 of steel pipes outside the combined column with connecting plate 6 welded at one end and the other end buried in the foundation, integral joints of steel pipes, segmental steel columns, and segmental steel beams; Connecting plate 6, the lower part of the short steel pipe column 7 outside the combined column buried in the foundation is fixed to the foundation, the upper part is about 0.5m higher than the foundation, and then this part is poured with concrete close to the connecting plate 6, and the lower part of the segmental steel column The steel pipe short column 7 outside the composite column above the ground is connected through the corresponding connecting plate 6. After all the segmental steel columns are connected, concrete 10 is poured to form a cross-shaped composite bottom column with a rectangular steel pipe concrete flange; The connection plate 6 of the node end column 5 is reliably connected to the cross-shaped composite bottom column, and the segmental steel beam and the steel pipe integral node are connected by high-strength bolts 11. At the same time, other segmental steel beams are installed and concrete 10 is poured to ensure Segmental steel columns, segmental steel beams, and integral joints of steel pipes are filled with concrete to ensure the continuity of the concrete. After curing, the bottom composite frame system is formed, and then the second layer composite frame system is successively constructed until the top layer composite frame system. This construction method is called layer-by-layer construction method. This construction method does not involve the binding of steel bars, all steel components are prefabricated in the factory, and concrete is poured on site, which greatly reduces labor force, not only shortens the construction period, but also ensures the integrity of the structure, while the overall cost is low.

Example 2:

This composite frame system with beam-column flanges of rectangular concrete-filled steel tubes is composed of composite columns 1 and composite beams 2 connected by joints 3, composite beams 2 are horizontally arranged between composite columns 1, and node 3 is an integral joint of steel tube concrete, and the composite steel tube concrete The I-shaped node is to weld the I-shaped node end beam with rectangular steel pipes on the upper and lower flanges and the node end column with rectangular steel pipes on the flange. The high-strength bolts 11 can be connected with the I-shaped composite beam and the I-shaped composite column, and concrete 10 is poured into the beam column and the node at the steel pipe integral joint to form the steel pipe concrete integral joint; the other end beam of the I-shaped joint Connecting plate 6 is welded at one end, connecting plate 6 is welded at both ends of node end column 5 respectively, and concrete 10 is poured in the steel pipe integral node; composite column 1 is an I-shaped composite column with a rectangular steel pipe concrete flange, and the flange of composite column 1 The connecting plates 6 with reserved bolt holes 19 are respectively welded at both ends of the steel column to form a segmental steel column, and the segmental steel columns are fixed and connected by the connecting plate 6 and then poured with concrete 10 to form a composite column 1; the composite beam 2 is a rectangular steel pipe with a flange Concrete I-shaped honeycomb beams, steel pipes at both ends of the composite beam 2 flange are welded with connecting plates 6 with reserved bolt holes 19 to form segmental steel beams, and the segmental steel beams are fixedly connected by connecting plates 6 and then poured with concrete 10. The composite beam 2 is formed; the node 3 and the composite column 1 are fixedly connected by high-strength bolts 11 at the respective connection plates 6 , and the node 3 and the composite beam 2 are also fixedly connected by high-strength bolts 11 at the respective connection plates 6 .

Composite column 1 is an I-shaped composite column with a rectangular steel tube concrete I-shaped composite column, and node 3 is a T-shaped integral node. It is welded into one body, and the I-shaped steel web 18 of the node end column 5 is fixedly connected with the ordinary I-shaped node end beam through high-strength bolts 11 to form a T-shaped integral node.

The segmental steel column is prefabricated in the factory, the connecting plate 6 is welded to the rectangular steel pipe 8, and the cross-shaped steel web 9 is welded to the rectangular steel pipe 8 to form a segmental steel column with a rectangular steel pipe flange, and the concrete 10 is poured after being connected on site.

The segmental steel beam is prefabricated in the factory, the connecting plate 6 is welded to the rectangular steel pipe 8, and the I-shaped steel web 18 is welded to the rectangular steel pipe 8 to form a segmental steel beam whose flange is a rectangular steel pipe, and the concrete 10 is poured after being connected on site. The traditional I-shaped steel beam is improved, and the flange is made into a rectangular steel pipe, and the connecting plate 6 with bolt holes 19 is welded on the flange steel pipe at both ends of the beam to form an I-shaped segmental steel pipe with a rectangular steel flange. Beams are reliably connected to node end beams 4 through high-strength bolts 11 after arriving at the site, and then concrete 10 is poured. In order to reduce the deflection of the beam, internal prestressing steel wires can be arranged in the lower flange steel pipe, and tension holes are reserved on the inner side of the rectangular steel tube concrete flange of the node to realize the tensioning and anchoring of the prestressing steel wires. In order to increase the stability of the beam web, transverse stiffeners are arranged on the web. The upper and lower flange steel pipes can be symmetrical or asymmetrical.

The prestressed tendons 13 are arranged in the steel pipe of the lower flange of the composite beam, and the tension holes are reserved for the joints. The prestressed tendons 13 pass through the joint web and the tension holes reserved for the joints pass through the anchors 16 and 17 anchor pads on the outside of the joints. Pulling anchors can achieve a larger span of the beam. When the span of the beam is large, the prestressed tendons 13 can be arranged in the steel pipe of the lower flange. Since the jack used for tensioning is too large, it is impossible to realize the tension on the inner side of the rectangular steel tube concrete flange of the node, and the prestressed tendons 13 need to pass through the web. The slab is tensioned and anchored on the outside of the integral node, so a tension hole needs to be reserved at the position where the prestressed tendon 13 passes through the flange of the rectangular steel tube concrete at the node. In order to prevent large deformation of the joint flanges, vertical stiffeners 14 are arranged symmetrically between the rectangular steel tube concrete flanges of the joints. When the prestressed tendons need to be stretched in both directions, the two-way prestressed tendons will meet at the node, and the prestressed tendons 13 in the two directions should be staggered up and down, so that the flange CFST forms an eccentric member. In the process of making integral joints, the two-way vertical stiffeners should be welded, and holes should be opened on the web, flange rectangular steel pipes and stiffeners to form an integral porous joint with a total of 16 holes and flanges with rectangular steel pipes.

Concrete 10 adopts self-compacting fine stone concrete. After the concrete is poured, the concrete of the beams, columns and integral joints are all connected, and are integrated with the steel pipe after curing.

The construction method of the composite frame system in which the above-mentioned beam-column flanges are rectangular steel tube concrete:

Firstly, the material is cut in the factory according to the design, and all the required steel components are welded and prefabricated, including the short steel pipe column 7 outside the combined column with the connecting plate 6 welded at one end and the other end buried in the foundation, and the combined column with the connecting plate 6 welded at both ends Rectangular steel pipe columns, the flanges of the connecting plates 6 welded at both ends are I-shaped honeycomb beams of rectangular steel pipes and integral porous nodes. The lower part of the outer steel pipe short column 7 of all composite columns welded with the connecting plate 6 of the frame system is fixed to the foundation, and the upper part is about 0.5m higher than the foundation, and then concrete is poured into the steel pipe close to the connecting plate 6. The lower part of the rectangular steel pipe of the combined column welded with the connecting plate 6 at both ends is connected with the short column 7 of the outer steel pipe of the combined column above the ground through the connecting plate 6. After all the rectangular steel pipes of the combined column are connected, concrete 10 is poured to form a flange of The I-shaped combined bottom column of rectangular steel tube concrete. Install the integral porous node, realize reliable connection with the bottom column through the connecting plate 6 of the node end column 5, and connect the I-shaped honeycomb beam with the flange of steel pipe with the integral porous node through high-strength bolts 11, and after the connection, carry out the joint After proper welding, other frame beams have been installed successively, and at the same time, the unbonded prestressed tendons arranged in the rectangular steel pipes in the beams are placed in the steel pipes. Then complete the connection of the second-floor steel members like the bottom layer. Stretch and stretch the prestressed tendons 13 in the bottom beam, temporarily anchor them on the rectangular steel pipe flange of the node, and then pour concrete to the top of the second-story column to ensure that the columns, beams, and nodes are filled with concrete 10, and the concrete penetration. Then build upwards one after another to complete the connection of the three floors. The unbonded prestressed tendons arranged in the rectangular steel pipes of the second-story beams are arranged and straightened and stretched, and then the second-story concrete is poured to the top of the third-story columns, and the construction of the top layer is completed in turn. After the concrete is cured, it is stretched from bottom to top every The prestressed tendons 13 of the layer are reliably anchored to complete the prestressed construction of the overall frame. This construction method is called the overall post-tensioning method. After the frame is formed, the tensioned prestressed tendons 13 are the same as the conventional prestressed concrete frame to ensure the overall stress. The advantage is that the layer-by-layer construction is uninterrupted and the construction period is short.

Example 3:

In this embodiment, the composite column is a cross-shaped composite column whose flange is rectangular steel tube concrete, and the joints are cross-shaped steel tube integral joints, and the others are the same as those in Embodiment 2.

The construction method of the composite frame system in which the above-mentioned beam-column flanges are rectangular steel tube concrete:

Firstly, the material is cut in the factory according to the design, and all the required steel components are welded and prefabricated, including the short steel pipe column 7 outside the combined column with the connecting plate 6 welded at one end and the other end buried in the foundation, and the combined column with the connecting plate 6 welded at both ends Rectangular steel pipe columns, the flanges of the connecting plates 6 welded at both ends are I-shaped honeycomb beams of rectangular steel pipes and integral porous nodes. The lower part of the outer steel pipe short column 7 of all the composite columns welded with the connecting plate 6 of the frame system is fixed to the foundation, and the upper part is about 0.5m higher than the foundation, and then concrete is poured into the steel pipe close to the connecting plate. The lower part of the rectangular steel pipe of the combined column welded with the connecting plate 6 at both ends is connected with the short column 7 of the outer steel pipe of the combined column above the ground through the connecting plate 6. After all the rectangular steel pipes of the combined column are connected, concrete 10 is poured to form a flange of Cross-shaped or I-shaped combined bottom column of rectangular steel tube concrete. Install the integral porous node, realize reliable connection with the bottom column through the connecting plate 6 of the node end column 5, connect the I-shaped honeycomb beam with the flange of steel pipe and the integral node through the high-strength bolt 11, and properly carry out the connection after the connection The welding of other frame beams has been completed successively, and at the same time, the unbonded prestressed steel wires arranged in the rectangular steel pipes in the beams are placed in the steel pipes. Then complete the connection of the steel members of the second floor as the same as the bottom floor. Straighten and stretch the prestressed steel wires in the ground floor beams, temporarily anchor them on the inner sides of the rectangular steel pipe flanges of the joints, and then pour concrete to the top of the second floor columns to ensure that the columns, beams and joints are filled with concrete, and that the concrete is penetrated After the maintenance reaches a certain strength, the prestressed steel wire is stretched twice to achieve the tension control stress. Form the underlying prestressed composite frame system. Then build the second layer to the top layer one after another. When stretching the prestressed steel wires of the lower layer, ensure that the steel structure of this layer has been connected, so as to ensure that the system does not undergo large deformation during the process of stretching the prestressed steel wires. This construction method is called two-layer one-piece method. The construction method does not involve the binding of steel bars, all steel components are prefabricated in the factory, the construction has good continuity and uninterrupted, and the construction period is greatly shortened. When the span is large, the prestressed tendons 13 need to be stretched in the beam. Because the jacks used for stretching are too large, the tension cannot be realized on the inner side of the rectangular steel tube concrete flange of the node. The prestressed tendons 13 need to pass through the web in the The outer side of the integral node is tensioned and anchored. When the prestressed tendons need to be stretched in both directions, the prestressed tendons 13 should be arranged in advance. After the upper steel frame is formed, the prestressed tendons 13 are temporarily stretched and straightened, and the concrete 10 of this layer is poured. Secondary stretching of prestressed tendons 13 in this layer.

Claims (10)

1. a kind of beam column edge of a wing is the group frame system of concrete-filled rectangular steel tube, it is characterised in that：This beam column edge of a wing is square The group frame system of shape concrete filled steel tube is by coupled column（1）And combination beam（2）By node（3）Connect and compose, combination beam（2） It is horizontally set on coupled column（1）Between, node（3）It is concrete filled steel tube monoblock type node, concrete filled steel tube monoblock type node is By upper lower flange for the I-shaped node end carriage of rectangular steel pipe and the edge of a wing are the node newel post of rectangular steel pipe（5）It is integrally welded, I-shaped node end carriage and node newel post（5）Communicated between the rectangular steel pipe of junction, form steel pipe monoblock type node, it is I-shaped The other end of node end carriage is welded to connect plate（6）, node newel post（5）Two ends be respectively welded connecting plate（6）, steel pipe monoblock type section Casting concrete in point（10）；Coupled column（1）It is that the edge of a wing is the cross or I-shaped coupled column of concrete-filled rectangular steel tube, combination The two ends of post edge of a wing rectangular steel pipe are respectively welded prepared screw-bolt hole（19）Connecting plate（6）, form sectional type steel column, sectional type steel Pass through connecting plate between post（6）It is fixedly connected after-pouring concrete and forms coupled column（1）；Combination beam（2）It is that the edge of a wing is rectangle The I-shaped Honeycomb Beam of concrete filled steel tube, prepared screw-bolt hole is welded on the two ends steel pipe for combining flange of beam（19）Connecting plate（6）, Sectional type girder steel is formed, connecting plate is passed through between sectional type girder steel（6）It is fixedly connected after-pouring concrete and forms combination beam （2）；Node（3）With coupled column（1）In respective connecting plate（6）Place passes through high-strength bolt（11）It is fixedly connected, node（3）With group Close beam（2）In respective connecting plate（6）Place is also by high-strength bolt（11）It is fixedly connected.

2. the beam column edge of a wing according to claim 1 is the group frame system of concrete-filled rectangular steel tube, it is characterised in that：Institute The sectional type steel column stated is prefabricated in the factory, its connecting plate（6）Welded with rectangular steel pipe, by cross-shaped steel web（9）With rectangle It is the sectional type steel column of rectangular steel pipe that steel-pipe welding forms the edge of a wing, to joint connection in site after-pouring concrete（10）.

3. the beam column edge of a wing according to claim 2 is the group frame system of concrete-filled rectangular steel tube, it is characterised in that：Institute The sectional type girder steel stated is prefabricated in the factory, its connecting plate（6）Welded with rectangular steel pipe, by i shaped steel web（18）With rectangle It is the sectional type girder steel of rectangular steel pipe that steel-pipe welding forms the edge of a wing, to joint connection in site after-pouring concrete（10）.

4. the beam column edge of a wing according to claim 3 is the group frame system of concrete-filled rectangular steel tube, it is characterised in that：Institute Arrangement prestressing with bond steel wire in the combination beam lower flange steel pipe stated, on the inside of the concrete-filled rectangular steel tube edge of a wing of node on reserve Tensioning hole, realizes the tensioning and anchoring of compressor wire.

5. the beam column edge of a wing according to claim 4 is the group frame system of concrete-filled rectangular steel tube, it is characterised in that：Institute The combination beam stated（2）I shaped steel web（18）Upper arrangement transverse stiffener.

6. the beam column edge of a wing according to claim 5 is the group frame system of concrete-filled rectangular steel tube, it is characterised in that：Institute Arrangement prestress muscle in the combination beam lower flange steel pipe stated（13）, node reserves tensioning hole, presstressed reinforcing steel（13）Through node abdomen The tensioning hole of plate and node reserves stretch-draw anchor on the outside of node.

7. the beam column edge of a wing according to claim 6 is the group frame system of concrete-filled rectangular steel tube, it is characterised in that：Institute The node newel post for stating（5）The rectangular steel pipe edge of a wing between be arranged symmetrically vertical ribbed stiffener（14）.

8. the beam column edge of a wing according to claim 7 is the group frame system of concrete-filled rectangular steel tube, it is characterised in that：Institute The concrete stated（10）Using self-compaction pea gravel concreten, after having poured concrete, combination beam（2）, coupled column（1）And node （3）Concrete be whole insertions, after maintenance with steel pipe formed one.

9. the beam column edge of a wing according to claim 8 is the group frame system of concrete-filled rectangular steel tube, it is characterised in that：Institute The coupled column stated（1）It is that the edge of a wing is the I-shaped coupled column of concrete-filled rectangular steel tube, node（3）It is T-shaped monoblock type node, will be upper and lower The edge of a wing for rectangular steel pipe I-shaped node end carriage and the edge of a wing for rectangular steel pipe I-shaped node newel post it is integrally welded, section Pass through high-strength bolt on point newel post web（11）It is fixedly connected with common I-shaped node side beam, forms T-shaped monoblock type node.

10. the beam column edge of a wing described in a kind of claim 3 is the construction method of the group frame system of concrete-filled rectangular steel tube, its It is characterised by：Be prefabricated in the factory institute's steel member in need first, including one end is welded with connecting plate（6）, the other end be embedded in base The outer steel pipe short column of coupled column in plinth（7）, steel pipe monoblock type node, sectional type steel column, sectional type girder steel；Connecting plate will be welded with （6）The outer steel pipe short column of coupled column（7）Bottom is realized affixed with basis, and top is higher by basic 0.5m or so, then by this part Sectional type steel column bottom is passed through corresponding connecting plate by casting concrete close at connecting plate（6）With coupled column above ground level Outer steel pipe short column（7）Connect, after all sectional type steel columns are connected, casting concrete（10）, the edge of a wing is formed for rectangular steel pipe The cross combination bottom column of concrete；Steel pipe monoblock type node is installed, by node newel post（5）Connecting plate（6）With cross Type combination bottom column is realized being reliably connected, by high-strength bolt（11）Sectional type girder steel and steel pipe monoblock type node are connected, together When installation other sectional type girder steels, casting concrete（10）, it is ensured that sectional type steel column, sectional type girder steel and steel pipe monoblock type Fill up concrete in node, and ensure the connectivity of concrete, bottom group frame system is formed after maintenance, then construct successively Second layer group frame system, until top layer group frame system.