CN111173129A

CN111173129A - Prestress assembling frame structure and construction method

Info

Publication number: CN111173129A
Application number: CN202010094940.7A
Authority: CN
Inventors: 杨勇; 张树琛; 冯世强; 于云龙; 薛亦聪; 陈阳
Original assignee: Xian University of Architecture and Technology
Current assignee: Xian University of Architecture and Technology
Priority date: 2020-02-17
Filing date: 2020-02-17
Publication date: 2020-05-19

Abstract

The application discloses a prestress assembly frame structure and a construction method, and relates to the technical field of building construction. The prestress assembly frame structure comprises a precast concrete column, a precast beam, a precast connecting device and a prestress rib; the end surface of the prefabricated beam is detachably connected with the prefabricated connecting device; one end of the prefabricated connecting device, which is far away from the prefabricated cross beam, is detachably connected to the prefabricated concrete column; the prestressed tendons sequentially penetrate through the precast concrete column, the precast connecting device and the precast cross beam and are fixed on the precast concrete column, and the precast connecting device is used for bearing vibration deformation. The prestress assembling frame structure is convenient and fast to construct, controllability of connection quality between main body components and restorability of the whole structure can be improved, and the prestress assembling frame structure is suitable for building structures with higher requirements on construction performance and shock resistance.

Description

Prestress assembling frame structure and construction method

Technical Field

The application relates to the technical field of building construction, in particular to a prestress assembling frame structure and a construction method.

Background

The prefabricated structure is a structural form commonly adopted in building construction, and adopts prefabricated components as main stressed components, and the prefabricated components are connected through different technical means to form an integral common bearing.

The existing prefabricated concrete structure has poor controllability of connection quality and poor recovery performance.

Disclosure of Invention

The application provides a prestress assembly frame structure and a construction method, the construction of the prestress assembly frame structure is convenient, the controllability of the connection quality between main body components and the restorability of the whole structure can be improved, and the prestress assembly frame structure is suitable for building structures with higher requirements on construction performance and shock resistance.

The first aspect provides a prestress assembling frame structure, which comprises a precast concrete column, a precast cross beam, a precast connecting device and a prestress rib; the end surface of the prefabricated beam is detachably connected with the prefabricated connecting device; one end of the prefabricated connecting device, which is far away from the prefabricated cross beam, is detachably connected to the prefabricated concrete column; the prestressed tendons sequentially penetrate through the precast concrete column, the precast connecting device and the precast cross beam and are fixed on the precast concrete column, and the precast connecting device is used for bearing vibration deformation.

According to the technical scheme, the prestress assembly frame structure consumes energy through plastic deformation of the prefabricated connecting device, the bending resistance bearing capacity of the whole frame is enhanced through the prestress ribs, and premature seam leakage of the interface between the third connecting plates on the two sides in the prefabricated beam and the first pouring concrete body is prevented. The prestress assembling frame structure is deformed or damaged only at the prefabricated connecting device under the action of an earthquake, a main body component is basically not damaged, the whole structure is clearly stressed, the earthquake resistance is good, and certain restorable performance is achieved. The precast concrete column, the precast cross beam and the precast connecting device can be precast in advance, and can be assembled quickly on site, so that the construction efficiency of the prestress assembling frame structure is effectively improved. All adopt the detachable mode to connect between precast beam, prefabricated connecting device and the precast concrete post, shake back principal component structural damage little, can carry out the change restoration of destruction section fast after shaking for shake in the prestressing force assembly frame structure and repair, shake greatly even and repair, personnel and property safety when the guarantee shakes have good social and economic benefits, and good engineering using value and popularization and application prospect.

With reference to the first aspect, in a first possible implementation manner of the first aspect of the present application, the prestressed fabricated frame structure includes a plurality of precast concrete columns; arranging a plurality of precast concrete columns in an array; each precast concrete post is detachably connected with a plurality of precast connecting devices at intervals along the vertical direction.

Above-mentioned technical scheme, prestressing force assembly frame construction is multilayer frame construction, and building construction's suitability is stronger.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect of the present application, the prefabricated connecting device includes a first connecting plate, a second connecting plate, a first section steel and a stiffening rib; two ends of the first section steel are respectively connected to the first connecting plate and the second connecting plate; two ends of the stiffening rib are respectively connected with the flange of the first section steel and the first connecting plate; first connecting plate detachably connects in precast concrete post, and second connecting plate detachably connects in prefabricated crossbeam.

Above-mentioned technical scheme, first connecting plate can be dismantled with precast concrete post and be connected, and the second connecting plate can be dismantled with the precast beam and be connected, can carry out the prefabricated connecting device fast and be connected with the assembly of precast concrete post and precast beam respectively. The stiffening rib is connected the edge of a wing and the first connecting plate of first shaped steel respectively, can strengthen prefabricated connecting device's bulk joint strength. When a large earthquake occurs, the flange of the first section steel can yield and flash outwards, so that plastic deformation is caused to consume energy, and a favorable failure mode in earthquake-resistant design is formed. The prefabricated connecting device can be quickly put into use or produced after being simply repaired, and the controllability of the connecting quality is ensured.

In combination with the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect of the present application, the first connecting plate and the second connecting plate are both provided with first through holes for the prestressed tendons to pass through.

According to the technical scheme, the prestressed tendons penetrate through the prefabricated connecting device through the first through holes, the prestressed tendons are convenient to cross, the prestressed tendons can be in an elastic state after being deformed in the length direction of the cross beam of the prestressed assembly frame structure, and the prestressed assembly frame structure has strong bending rigidity and bearing capacity.

With reference to the second possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect of the present application, the first connecting plate is locked to the precast concrete column by a bolt, and the second connecting plate is locked to the precast cross beam by a bolt.

According to the technical scheme, as the core node area of the prestress assembly frame structure, the prefabricated concrete column is connected with the first connecting plate, and the prefabricated beam is connected with the second connecting plate in a bolt locking mode, the connection method is simple in structure, high in construction speed, good in connection bearing performance, and easy to guarantee construction quality.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect of the present application, the precast beam includes a third connecting plate, a second section steel, a first cast-in steel reinforcement frame, and a first cast-in concrete body; the first pouring steel bar frame is connected to the third connecting plate, the second section steel is connected to the third connecting plate and located in the first pouring steel bar frame, and a reinforcing bolt is fixed to the flange of the second section steel; the first pouring steel bar frame and the second section steel are arranged in the first pouring concrete body; and the third connecting plate is locked on the prefabricated connecting device through a bolt.

Above-mentioned technical scheme, prefabricated crossbeam can pour the manufacturing in advance in the mill. The flange of the second profile steel is fixed with the reinforcing stud, so that the connection strength of the first cast concrete body and the third connecting plate can be enhanced, the first cast concrete body and the third connecting plate are firmly combined, the third connecting plate and the first cast concrete body are prevented from being separated from a gap during an earthquake, and the overall stress performance of the prefabricated beam is improved.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect of the present application, the precast beam further includes a first embedded pipe for the tendon to pass through, and the first embedded pipe is located in the first casting steel bar frame; the third connecting plate is provided with a second through hole for the prestressed tendon to pass through, and the first embedded pipe is connected to the second through hole.

According to the technical scheme, the prestressed tendons penetrate through the prefabricated beam through the first embedded pipe and the second through hole, the prestressed tendons are prevented from being contacted with concrete, the prestressed tendons can conveniently penetrate and stretch in the length direction of the beam of the prestressed assembly frame structure, the prestressed tendons can be in an elastic state after being deformed in the length direction of the beam of the prestressed assembly frame structure, and the prestressed assembly frame structure has strong bending rigidity and bearing capacity.

With reference to the fifth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect of the present application, the precast concrete column includes a second cast steel bar frame, a square steel tube, a second embedded tube, a third embedded tube, and a second cast concrete body; the square steel pipe is sleeved on the second pouring reinforcing steel frame; the second embedded pipe and the third embedded pipe penetrate through the square steel pipe, the second embedded pipe is arranged corresponding to the first embedded pipe, and the third embedded pipe is used for allowing a bolt connected with the prefabricated connecting device to penetrate through; the second pouring reinforcing steel frame, the second embedded pipe and the third embedded pipe are arranged in the second pouring concrete body.

According to the technical scheme, the precast concrete column can be cast and manufactured in advance in a factory. The square steel pipe is used as a node core area and is used for connecting a first connecting plate in the prefabricated connecting device. The third embedded pipe penetrates through the square steel pipe, so that the bolt can conveniently penetrate through the third embedded pipe and then is connected with the square steel pipe and the first connecting plate. The second embedded pipe penetrates through the square steel pipe and is arranged corresponding to the first embedded pipe, so that the prestressed tendons sequentially penetrate through the precast concrete column, the precast connecting device and the precast cross beam along the length direction of the cross beam of the prestressed assembly frame structure and are fixed on one side of the square steel pipe.

With reference to the first aspect, in an eighth possible implementation manner of the first aspect of the present application, the prestressed assembly frame structure further includes an anchor; the anchorage device is used for fixing the prestressed tendons to the precast concrete column.

According to the technical scheme, the prestressed tendons are fixed on the square steel pipes of the precast concrete columns through anchors so as to form tensile stress.

In a second aspect, a construction method of a pre-stressed assembled frame structure is provided, where the pre-stressed assembled frame structure is the pre-stressed assembled frame structure in the first aspect or any one of the possible implementation manners of the first aspect; the construction method comprises the following steps:

manufacturing a precast concrete column, a precast cross beam and a precast connecting device;

fixing a plurality of precast concrete columns on a foundation structure in an array;

connecting the prefabricated beam with the prefabricated connecting device;

arranging the connected prefabricated beam and the prefabricated connecting device between two adjacent prefabricated concrete columns, and connecting the prefabricated connecting device and the prefabricated concrete columns through bolts;

sequentially penetrating the prestressed tendons through the precast concrete columns, the precast connecting devices and the precast cross beams, arranging anchorage devices at two ends of the prestressed tendons, and tensioning and anchoring the prestressed tendons through jacks.

According to the technical scheme, the prestressed assembly frame structure can be efficiently manufactured and constructed on site, construction is convenient, construction quality is high, and cost is lower.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic structural view of a section of a node region in a pre-stressed assembled frame structure according to an alternative embodiment of the present application;

FIG. 2 is a schematic view of the overall construction of an alternative embodiment of the prestressed mounting frame construction of the present application;

FIG. 3 is a schematic view of a precast concrete column according to an alternative embodiment of the present application;

FIG. 4 is a schematic view of a prefabricated joint assembly according to an alternative embodiment of the present application;

FIG. 5 is a schematic structural view of a precast beam according to an alternative embodiment of the present application;

FIG. 6 is a front view of FIG. 1;

3 FIG. 3 7 3 is 3 a 3 sectional 3 view 3 taken 3 along 3 line 3 A 3- 3 A 3 of 3 FIG. 3 6 3; 3

FIG. 8 is a sectional view taken along line B-B of FIG. 6;

FIG. 9 is a cross-sectional view taken along line C-C of FIG. 6;

FIG. 10 is a sectional view taken along line D-D of FIG. 6;

fig. 11 is a sectional view taken along line E-E in fig. 6.

Icon: 1-prefabricating a concrete column; 2-square steel tube; 3-a second pre-buried pipe; 4-a third pre-buried pipe; 5-longitudinal rib I; 6-stirrup I; 7-a second concreting body; 8-prefabricating a connecting device; 9-a first connection plate; 10, bolt one; 11-a first through hole; 12-a first section steel; 13-a stiffener; 14-a second connecting plate; 15-bolt two; 16-a second through hole; 17-prefabricating the cross beam; 18-a third connecting plate; 19-through hole three; 20-a second section steel; 21-reinforcing studs; 22-a first pre-buried pipe; 23-longitudinal rib two; 24-stirrup II; 25-a first cast concrete body; 26-prestressed tendons; 27-anchorage device.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it is to be noted that the terms "inside", "below", and the like refer to orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when products of the application are used, and are used only for convenience in describing the application and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In this application, unless expressly stated or limited otherwise, the first feature may be directly on or under the second feature or may include both the first and second features being in direct contact, but also the first and second features being in contact via another feature between them, not being in direct contact. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The structural damage of the member is too large in the large earthquake in the current fabricated concrete structure, the controllability of the connection quality is poor, the restorability is basically absent, wet operation exists in a node area in the construction process, the construction mode is complex, and the efficiency is low.

An optional embodiment of this application provides a prestressing force assembly frame construction, prestressing force assembly frame construction uses precast concrete post 1, prefabricated crossbeam 17 and prefabricated connecting device 8 to form the node district as main structural component, and above-mentioned component all is the production that becomes more meticulous in mill scale, and local welding and whole additional prestressing force can accomplish the construction after the on-the-spot concatenation, and the construction is simple and convenient, and is safe high-efficient, and the field work volume is few. The prestress assembly frame structure can guide deformation to be concentrated at the prefabricated connecting device 8, a favorable failure mode in earthquake-proof design is convenient to form, the prestress ribs 26 are always in an elastic stage in the deformation process of the whole structure, so that the main body member structure of the prestress assembly frame structure after earthquake is small in damage, the prestress assembly frame structure is not required to be repaired or simply repaired and then is quickly put into use or produced, the medium-earthquake repairable and even large-earthquake repairable in the earthquake-proof fortification target can be really achieved, the safety of personnel and property during earthquake is guaranteed, and the prestress assembly frame structure has good social benefit, economic benefit, good engineering application value and popularization and application prospect.

Please refer to fig. 1, fig. 2 and fig. 6 simultaneously. Fig. 1 shows a specific structure of a section of a node region in a prestressed mounting frame structure provided in an alternative embodiment of the present application, fig. 2 shows a specific structure of an entirety of the prestressed mounting frame structure provided in an alternative embodiment of the present application, and fig. 6 is a front view of fig. 1.

As shown in fig. 1, the prestressed assembly frame structure comprises a precast concrete column 1, two precast connecting devices 8, two precast cross beams 17 and a prestressed tendon 26, which form a section of node area in the same linear direction of the horizontal plane, wherein the prestressed tendon 26 sequentially passes through one precast cross beam 17, one precast connecting device 8, the precast concrete column 1, the other precast connecting device 8 and the other precast cross beam 17.

Referring to fig. 2, in a construction site, a plurality of precast concrete columns 1 are arranged in an array, a plurality of precast connecting devices 8 can be arranged at intervals in the vertical direction of each precast concrete column 1, and a precast cross beam 17 and two precast connecting devices 8 are arranged between every two adjacent precast concrete columns 1 along the same horizontal plane, so that an overall transverse and longitudinal multi-layer type prestressed assembly frame structure is finally formed, and the precast concrete columns are suitable for building construction with different construction requirements. The precast concrete columns 1 located at the outer edge ends of the prestressed assembly frame structure are used as anchoring points of the prestressed tendons 26, and two ends of the prestressed tendons 26 are respectively anchored on the square steel tubes 2 of the two precast concrete columns 1 located in front and at the back as shown in fig. 2 through anchors 27 to form tensile stress. In the embodiment of the present application, the prestressed tendons 26 are prestressed steel strands or prestressed steel tendons, and the anchorage device 27 may be a clip-type anchorage device, a pier head anchorage device, or a nut.

The prestress assembling frame structure bears the vibration deformation through the prefabricated connecting device 8, energy can be consumed in the process that the prefabricated connecting device 8 generates plastic deformation, deformation is guided to be concentrated at the prefabricated connecting device 8 by the prestress assembling frame structure, a favorable failure mode in the anti-seismic design is convenient to form, the whole stress is clear, and the anti-seismic performance is good. The bending resistance bearing capacity of the integral frame is enhanced through the prestressed tendons 26, premature seam forming of the interface between the third connecting plates 18 on the two sides in the prefabricated beam 17 and the first pouring concrete body 25 under the action of an earthquake is prevented, the prestressed assembly frame structure is deformed or damaged only at the prefabricated connecting device 8 under the action of the earthquake (the first connecting plate 9 and the flange of the first section steel 12 yield in the failure mode of the connecting mode), the main body components are basically not damaged, the integral stress of the structure is clear, the anti-seismic performance is good, and the structure has certain restorable performance. The precast concrete column 1, the precast cross beam 17 and the precast connecting device 8 can be precast in advance, and can be assembled quickly on site, so that the construction efficiency of the prestress assembling frame structure is effectively improved. The prefabricated beam 17, the prefabricated connecting device 8 and the prefabricated concrete column 1 are connected in a detachable mode (see the following description for a specific connecting mode), the structural damage of a main body component after earthquake is small, and the damaged section can be replaced and repaired quickly after earthquake, so that the prestressed assembly frame structure can be repaired after earthquake, even repaired after earthquake, the safety of personnel and property during earthquake is guaranteed, and the prefabricated beam has good social benefit and economic benefit, good engineering application value and popularization and application prospect.

Please continue to refer to fig. 3 and 11. Fig. 3 shows a concrete structure of a precast concrete column 1 provided in an alternative embodiment of the present application; fig. 11 is a sectional view taken along line E-E in fig. 6, i.e., a schematic sectional view of the precast concrete column 1.

The precast concrete column 1 comprises a second pouring steel bar frame, a square steel tube 2, a second embedded pipe 3, a third embedded pipe 4 and a second pouring concrete body 7.

The second pouring reinforcing steel frame is a reinforcing steel framework formed by binding a plurality of longitudinal bars I5 and a plurality of stirrups I6. Four are no less than to indulge muscle 5 quantity, indulge muscle 5 intervals and extend along vertical direction, and 6 covers of stirrup are in the outside of indulging muscle one 5, and a plurality of stirrups 6 equidistance intervals set up on vertical direction, and non-compound stirrup or compound stirrup form can be chooseed for use to stirrup 6. The second casting reinforcing frame extends along the vertical direction. The square steel tube 2 is sleeved on the second casting reinforcement frame, and the vertical length of the square steel tube 2 is not less than the height of the first connecting plate 9 (please refer to fig. 4) in the prefabricated connecting device 8.

In the present embodiment, the second buried pipe 3 is a corrugated pipe, and the third buried pipe 4 is a PVC (polyvinyl chloride) pipe. Holes are formed in the two sides of the square steel pipe 2, so that the second embedded pipe 3 and the third embedded pipe 4 can be embedded conveniently. The second embedded pipe 3 and the third embedded pipe 4 are arranged in parallel in the square steel pipe 2, the length direction of the second embedded pipe is parallel to the length direction of the prefabricated beam 17 (please refer to fig. 1 or fig. 2), and the end ports of the second embedded pipe 3 and the third embedded pipe 4 are flush with the outer surface of the square steel pipe 2. The second embedded pipe 3 is used for the tendon 26 (please refer to fig. 1) to pass through, and the pipe diameter of the second embedded pipe 3 is slightly larger than the diameter of the tendon 26. The third embedded pipe 4 is used for a first bolt 10 (shown in reference to fig. 4) for connecting the prefabricated connecting device 8 to pass through, and the pipe diameter of the third embedded pipe 4 is slightly larger than that of the first bolt 10.

The second pouring steel bar frame, the second embedded pipe 3 and the third embedded pipe 4 are arranged in a second pouring concrete body 7 to form the precast concrete column 1, and the second pouring concrete body 7 can be formed by formwork filling pouring through common concrete, recycled concrete or high-strength concrete.

The precast concrete column 1 may be cast in advance at a factory. The square steel pipe 2 is used as a node core area of the prestress assembly frame structure and is used for connecting a first connecting plate 9 in the prefabricated connecting device 8. Wherein the third pre-buried pipe 4 passes through the square steel pipe 2, thereby being convenient for the bolt to be connected the square steel pipe 2 with the first connecting plate 9 after passing through the third pre-buried pipe 4. The second pre-buried pipe 3 passes through the square steel pipe 2 and is arranged corresponding to the first pre-buried pipe 22 (see fig. 5), so that the prestressed tendons 26 sequentially pass through the precast concrete column 1, the precast connecting device 8 and the precast beam 17 along the length direction of the beam of the prestressed assembly frame structure and are fixed on one side of the square steel pipe 2.

Please continue to refer to fig. 4, fig. 7 and fig. 8. FIG. 4 illustrates a specific configuration of a prefabricated coupling device 8 provided in an alternative embodiment of the present application; 3 fig. 3 7 3 and 3 8 3 are 3 a 3 sectional 3 view 3 taken 3 along 3 a 3- 3 a 3 and 3 a 3 sectional 3 view 3 taken 3 along 3 b 3- 3 b 3 in 3 fig. 3 6 3, 3 respectively 3, 3 i.e. 3, 3 a 3 schematic 3 sectional 3 view 3 of 3 the 3 prefabricated 3 connecting 3 device 3 8 3. 3

The prefabricated connecting device 8 comprises a first connecting plate 9, a second connecting plate 14, a first section steel 12 and a stiffening rib 13. In the embodiment of the present application, the first section steel 12 may be an H-section steel or an i-section steel, and the stiffening ribs 13 are right-angled triangular steel plates.

One end of the first section steel 12 is welded to a central position of the first connection plate 9, and the other end of the first section steel 12 is welded to a central position of the second connection plate 14 such that webs of the first section steel 12 are perpendicular to the first connection plate 9 and the second connection plate 14, respectively. A common stiffening rib 13 is arranged on the upper flange and the lower flange of the first section steel 12 respectively, and two right-angle sides of the stiffening rib 13 are welded on the flange of the first section steel 12 and the plate surface of the first connecting plate 9 respectively. The stiffening ribs 13 can enhance the overall connection strength of the prefabricated connecting device 8. When a large earthquake occurs, the flange of the first section steel 12 can yield and flash outwards, so that plastic deformation is caused to consume energy, and a favorable failure mode in earthquake-resistant design is formed. The prefabricated connecting device 8 can be quickly put into use or produced after being simply repaired, and the controllability of the connecting quality is ensured.

The thickness of the first connecting plate 9 is calculated theoretically and is generally thin. A plurality of first bolts 10 are arranged on one side of the first connecting plate 9, which is far away from the first section steel 12, and the plurality of first bolts 10 are uniformly and symmetrically arranged on the first connecting plate 9 and correspond to the position of the third embedded pipe 4 (see fig. 3) on the square steel pipe 2.

The cross-sectional dimension of the second connecting plate 14 is larger than that of the prefabricated beam 17 (please refer to fig. 1), a plurality of second bolts 15 are arranged on one side of the second connecting plate 14, which is far away from the first section steel 12, the number of the second bolts 15 is not less than six, and the plurality of second bolts 15 are uniformly and symmetrically arranged on the first second connecting plate.

The first connecting plate 9 and the second connecting plate 14 are both provided with first through holes for the prestressed tendons 26 to pass through. The first through hole comprises a first through hole 11 and a second through hole 16, and the first through hole 11 corresponds to the second through hole 16. The prestressed tendons 26 pass through the prefabricated connecting device 8 through the first through holes, so that the prestressed tendons 26 can be conveniently connected in a penetrating way, the prestressed tendons 26 can be in an elastic state after being deformed along the length direction of the cross beam of the prestressed assembly frame structure, and the prestressed assembly frame structure has strong bending rigidity and bearing capacity.

The first connecting plate 9 is locked on the square steel tube 2 of the precast concrete column 1 through a first bolt 10, the second connecting plate 14 is locked on the precast cross beam 17 through a second bolt 15, and the precast connecting device 8 can be rapidly connected with the precast concrete column 1 and the precast cross beam 17 in an assembling mode. As a core node area of the prestress assembly frame structure, the connection of the precast concrete column 1 and the first connecting plate 9 and the connection of the precast cross beam 17 and the second connecting plate 14 are formed in a bolt locking mode, the connection method is simple in structure, high in construction speed, good in connection bearing performance and easy to guarantee construction quality.

Please continue to refer to fig. 5, 9 and 10. Fig. 5 shows a concrete structure of the precast beam 17 provided in an alternative embodiment of the present application; fig. 9 and 10 are a cross-sectional view taken along C-C and a cross-sectional view taken along D-D in fig. 6, respectively, that is, a cross-sectional view of the precast beam 17.

The prefabricated beam 17 comprises a third connecting plate 18, a second section steel 20, a first casting reinforcing frame, a first casting concrete body 25 and a first embedded pipe 22 for a prestressed tendon 26 to pass through. In the embodiment of the present application, the second type steel 20 may be H-shaped steel or i-shaped steel. The first cast-in concrete body 25 can be formed by formwork filling and casting with ordinary concrete, recycled concrete or high-strength concrete. The first pre-buried pipe 22 is a corrugated pipe.

The first casting reinforcing frame is surrounded by the second longitudinal bar 23 and the second stirrup 24. The second longitudinal ribs 23 extend along the length direction of the prefabricated transverse beam 17, and the end parts of the second longitudinal ribs 23 are welded at the inner side fixing positions of the third connecting plates 18. The second stirrups 24 are sleeved on the outer sides of the second longitudinal reinforcements 23 and are arranged at equal intervals.

One end of the second type steel 20 is welded at the central position of the third connecting plate 18 and is positioned in the middle of the plurality of longitudinal ribs 23 which are arranged at intervals up and down. A plurality of reinforcing studs 21 are welded to the upper and lower flange plates of the second type steel 20. The reinforcing studs 21 can enhance the connection strength of the first cast concrete body 25 and the third connecting plate 18, so that the first cast concrete body 25 and the third connecting plate 18 are firmly combined, and the interface between the third connecting plate 18 and the first cast concrete body 25 is prevented from being separated from a gap too early in an earthquake, so that the overall stress performance of the prefabricated beam 17 is improved.

The third connecting plate 18 is provided with a second through hole (not shown in the figure) for the tendon 26 to pass through, and the first embedded pipe 22 extends along the length direction of the precast beam 17 and is connected to the second through hole. The second through hole is arranged corresponding to the second through hole 16 (see fig. 4), so that the tendon 26 can sequentially pass through the second embedded pipe 3, the first through hole 11, the second through hole 16 and the first embedded pipe 22 on one side of the prestressed assembly frame structure (see fig. 2) until penetrating out of the precast concrete column 1 on the other side. The prestressed tendons 26 penetrate through the prefabricated beam 17 through the first embedded pipe 22 and the second through holes, so that the prestressed tendons 26 are prevented from contacting with concrete, the prestressed tendons 26 are convenient to penetrate and stretch in the length direction of the beam of the prestressed assembly frame structure, the prestressed tendons 26 can be in an elastic state after being deformed in the length direction of the beam of the prestressed assembly frame structure, and the prestressed assembly frame structure has strong bending rigidity and bearing capacity.

The width and the height of the third connecting plate 18 are both larger than the width and the height of the middle part of the prefabricated beam 17 after pouring. The upper side and the lower side of the third connecting plate 18 are respectively provided with a row of through holes III 19, and the first pouring reinforcing frame is positioned in the middle of the two rows of through holes III 19. The third through hole 19 is disposed corresponding to the second bolt 15 (see fig. 4), and when the third connecting plate 18 and the second connecting plate 14 (see fig. 4) are locked and connected by the second bolt 15.

The first cast-in steel reinforcement and the second section steel 20 are arranged in the first cast-in concrete body 25 to form the precast beam 17.

An alternative embodiment of the present application also provides a construction method of a prestressed fabricated frame structure, the construction method including the steps of:

(1) the precast concrete column 1, the precast cross member 17 and the precast connecting device 8 are previously manufactured at a factory.

For the precast concrete column 1, firstly binding a longitudinal bar I5 and a stirrup I6 to form a second pouring steel bar frame, then sleeving a square steel tube 2, penetrating a second embedded tube 3 and a third embedded tube 4, fixing the distance between the square steel tube 2 and the second pouring steel bar frame, and erecting a formwork to pour concrete to form a second pouring concrete body 7, thereby completing the prefabrication of the precast concrete column 1.

For the prefabricated beam 17, the third connecting plate 18 is welded to one end of the second section steel 20, and the reinforcing studs 21 are welded to the upper flange plate and the lower flange plate of the second section steel 20. And welding the end part of the second longitudinal rib 23 on the third connecting plate 18, and sleeving the second stirrup 24 on the outer side of the second longitudinal rib 23 at equal intervals. The first embedded pipe 22 is then penetrated, and concrete is cast by formwork to form a first cast concrete body 25, thereby completing prefabrication of the precast beam 17.

For the prefabricated connecting device 8, the first connecting plate 9 and the second connecting plate 14 are welded to both ends of the first section steel 12, respectively, and the reinforcing ribs 13 are welded between the first connecting plate 9 and the upper and lower flanges of the first section steel 12. Then, a first through hole 11 and a second through hole 16 are provided at the fixing positions of the first connecting plate 9 and the second connecting plate 14, and a first bolt 10 and a second bolt 15 are respectively arranged on the first connecting plate 9 and the second connecting plate 14 in a punching manner. The positions of the first through hole 11 and the second through hole 16 correspond to each other, and the diameters of the first through hole and the second through hole are slightly larger than the diameter of the prestressed tendon 26.

(2) A plurality of precast concrete columns 1 are fixed on a foundation structure of a construction site in an array.

(3) Connecting the precast cross beam 17 with the precast connecting device 8. The second connecting plate 14 and the third connecting plate 18 are connected by the second bolts 15, wherein each second bolt 15 needs to be tightened by a torque wrench to a calculated torque value to ensure the reliability of the connection.

(4) And hoisting the connected prefabricated beam 17 and prefabricated connecting device 8 combination to a fixed position between two adjacent prefabricated concrete columns 1, and then, passing the first bolt 10 through the third embedded pipe 4 and screwing the bolt to a calculated torque value by using a torque wrench.

(5) And (5) repeating the steps (3) to (4) to gradually complete the construction of the integral early-stage non-tensioning prestress stage of the prestress assembling frame structure.

(6) And sequentially passing the prestressed tendons 26 through the second embedded pipe 3, the first through hole 11, the second through hole 16 and the first embedded pipe 22 from one side of the prestressed assembly frame structure until the tendons penetrate out from the other side of the prestressed assembly frame structure.

Then, arranging anchorage devices 27 on two sides of the prestress assembly frame structure, tensioning the prestressed tendons 26 by using a feed-through jack to a designed initial prestress value, and then releasing tension and anchoring to complete the construction of the whole structure.

The construction method is used for construction of the prestress assembly frame structure, manufacturing and site construction of the prestress assembly frame structure can be efficiently carried out, construction is convenient, construction quality is high, and cost is lower.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pre-stressed assembly frame structure, characterized in that:

the prestress assembling frame structure comprises a precast concrete column, a precast beam, a precast connecting device and a prestress rib;

the end surface of the prefabricated beam is detachably connected with the prefabricated connecting device;

one end of the prefabricated connecting device, which is far away from the prefabricated cross beam, is detachably connected to the prefabricated concrete column;

the prestressed tendons sequentially penetrate through the precast concrete column, the precast connecting device and the precast cross beam and are fixed on the precast concrete column, and the precast connecting device is used for bearing vibration deformation.

2. The prestressed fitting frame structure of claim 1, wherein:

the pre-stressed assembled frame structure comprises a plurality of the precast concrete columns;

a plurality of the precast concrete columns are arranged in an array;

each precast concrete post is detachably connected with a plurality of precast connecting devices at intervals along the vertical direction.

3. The prestressed fitting frame structure according to claim 1 or 2, wherein:

the prefabricated connecting device comprises a first connecting plate, a second connecting plate, first section steel and a stiffening rib;

two ends of the first section steel are respectively connected to the first connecting plate and the second connecting plate;

two ends of the stiffening rib are respectively connected to the flange of the first section steel and the first connecting plate;

the first connecting plate is detachably connected to the precast concrete column, and the second connecting plate is detachably connected to the precast cross beam.

4. The prestressed fitting frame structure of claim 3, wherein:

the first connecting plate and the second connecting plate are provided with first through holes for the prestressed tendons to pass through.

5. The prestressed fitting frame structure of claim 3, wherein:

the first connecting plate is locked to the precast concrete column through a bolt, and the second connecting plate is locked to the precast cross beam through a bolt.

6. The prestressed fitting frame structure according to claim 1 or 2, wherein:

the prefabricated beam comprises a third connecting plate, second section steel, a first pouring reinforcing steel frame and a first pouring concrete body;

the first pouring steel bar frame is connected to the third connecting plate, the second section steel is connected to the third connecting plate and located in the first pouring steel bar frame, and a flange of the second section steel is fixed with a reinforcing bolt;

the first pouring steel bar frame and the second section steel are arranged in the first pouring concrete body;

and the third connecting plate is locked on the prefabricated connecting device through a bolt.

7. The pre-stressed assembly frame structure of claim 6, wherein:

the prefabricated beam further comprises a first embedded pipe for the prestressed tendons to penetrate through, and the first embedded pipe is located in the first pouring steel bar frame;

and the third connecting plate is provided with a second through hole for the prestressed tendon to pass through, and the first embedded pipe is connected with the second through hole.

8. The pre-stressed assembly frame structure of claim 6, wherein:

the prefabricated concrete column comprises a second pouring reinforcing steel frame, a square steel pipe, a second embedded pipe, a third embedded pipe and a second pouring concrete body;

the square steel pipe is sleeved on the second pouring reinforcing steel frame;

the second embedded pipe and the third embedded pipe penetrate through the square steel pipe, the second embedded pipe is arranged corresponding to the first embedded pipe, and the third embedded pipe is used for allowing a bolt connected with the prefabricated connecting device to penetrate through;

the second pouring reinforcing steel frame, the second embedded pipe and the third embedded pipe are arranged in the second pouring concrete body.

9. The prestressed fitting frame structure of claim 1, wherein:

the pre-stressed assembled frame structure further comprises an anchor;

the anchorage device is used for fixing the prestressed tendons to the precast concrete column.

10. A construction method of a prestressed erection frame structure, wherein the prestressed erection frame structure is the prestressed erection frame structure of any one of claims 1 to 9, the construction method comprising the steps of:

manufacturing the precast concrete column, the precast cross beam and the precast connecting device;

fixing a plurality of the precast concrete columns on a foundation structure in an array;

connecting the prefabricated cross beam with the prefabricated connecting device;

arranging the connected prefabricated cross beam and the connected prefabricated connecting devices between two adjacent prefabricated concrete columns, and connecting the prefabricated connecting devices and the prefabricated concrete columns through bolts;

and sequentially penetrating the prestressed tendons through the precast concrete column, the precast connecting device and the precast cross beam, arranging anchorage devices at two ends of the prestressed tendons, and tensioning and anchoring the prestressed tendons through a jack.