A prestressed assembly frame structure and construction method

Abstract

The present application discloses a prestressed assembly frame structure and a construction method, which relate to the field of building construction technology. The prestressed assembly frame structure includes a precast concrete column, a precast beam, a precast connection device and prestressed tendons; the end face of the precast beam is detachably connected to the precast connection device; the end of the precast connection device away from the precast beam is detachably connected to the precast concrete column; the prestressed tendons pass through the precast concrete column, the precast connection device and the precast beam in sequence and are fixed to the precast concrete column, and the precast connection device is used to bear vibration deformation. The prestressed assembly frame structure is easy to construct, and can improve the controllability of the connection quality between the main components and the recoverability of the entire structure, so that it is suitable for building structures with higher requirements for construction performance and earthquake resistance.

Description

Technical Field

[0001] This application relates to the technical field of building construction. Specifically, it relates to a prestressed assembled frame structure and a construction method thereof. Background Art

[0002] The prefabricated assembled structure is a commonly used structural form in building construction. It uses precast components as the main load-bearing components, and each precast component is connected through different technical means to form a whole to jointly bear the load.

[0003] The controllability of the connection quality of the existing prefabricated assembled concrete structure is poor, and the recovery performance is also poor. Summary of the Invention

[0004] This application provides a prestressed assembled frame structure and a construction method thereof. The construction of the prestressed assembled frame structure is convenient, and it can improve the controllability of the connection quality between the main components and the recoverable performance of the overall structure, so as to be applicable to building structures with higher requirements for construction performance and seismic resistance.

[0005] In a first aspect, a prestressed assembled frame structure is provided. The prestressed assembled frame structure includes precast concrete columns, precast cross beams, precast connection devices, and prestressed tendons. The end face of the precast cross beam is detachably connected to the precast connection device. One end of the precast connection device far from the precast cross beam is detachably connected to the precast concrete column. The prestressed tendons sequentially pass through the precast concrete column, the precast connection device, and the precast cross beam and are fixed to the precast concrete column. The precast connection device is used to bear vibration deformation.

[0006] In the above technical solution, the prestressed assembled frame structure dissipates energy through the plastic deformation of the precast connection device, and enhances the flexural bearing capacity of the overall frame through the prestressed tendons, preventing the interface between the two third connection plates in the precast cross beam and the first cast-in-place concrete body from cracking prematurely. Under the action of an earthquake, this kind of prestressed assembled frame structure only deforms or fails at the precast connection device, and the main components are basically not damaged. The overall structure has clear force, good seismic performance, and certain recoverable performance. The precast concrete columns, precast cross beams, and precast connection devices can all be prefabricated in advance and can be quickly assembled on site, effectively improving the construction efficiency of the prestressed assembled frame structure. The precast cross beam, the precast connection device, and the precast concrete column are all connected in a detachable manner. After the earthquake, the structural damage of the main components is small, and the damaged section can be quickly replaced and repaired after the earthquake, making the prestressed assembled frame structure repairable after an earthquake, and even repairable after a major earthquake, ensuring the safety of people and property during the earthquake, and having good social and economic benefits, as well as good engineering application value and popularization and application prospects.

[0007] In combination with the first aspect, in the first possible implementation manner of the first aspect of the present application, the prestressed assembled frame structure includes a plurality of precast concrete columns; the plurality of precast concrete columns are arranged in an array; and a plurality of precast connection devices are detachably connected to each precast concrete column at intervals in the vertical direction.

[0008] In the above technical solution, the prestressed assembled frame structure is a multi-story frame structure, and the applicability of building construction is stronger.

[0009] In combination with the first aspect or the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect of the present application, the precast connection device includes a first connecting plate, a second connecting plate, a first section steel, and stiffening ribs; both ends of the first section steel are respectively connected to the first connecting plate and the second connecting plate; both ends of the stiffening ribs 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.

[0010] In the above technical solution, 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, which can quickly assemble and connect the precast connection device to the precast concrete column and the precast cross beam respectively. The stiffening ribs are respectively connected to the flange of the first section steel and the first connecting plate, which can enhance the overall connection strength of the precast connection device. When a major earthquake occurs, the flange of the first section steel will yield and flash out, causing plastic deformation to dissipate energy, thereby forming a favorable failure mode in seismic design. After simple repair of the precast connection device, it can be quickly put into use or production to ensure the controllability of the connection quality.

[0011] In combination with the second possible implementation manner of the first aspect, in the third possible implementation manner of the first aspect of the present application, both the first connecting plate and the second connecting plate are provided with first through holes for prestressing tendons to pass through.

[0012] In the above technical solution, the prestressing tendons pass through the precast connection device through the first through holes, which is convenient for the threading of the prestressing tendons, so that the prestressing tendons can be deformed along the length direction of the cross beam of the prestressed assembled frame structure and be in an elastic state, making the prestressed assembled frame structure have strong flexural stiffness and bearing capacity.

[0013] In combination with the second possible implementation manner of the first aspect, in the fourth possible implementation manner of the first aspect of the present application, the first connecting plate is locked to the precast concrete column by bolts, and the second connecting plate is locked to the precast cross beam by bolts.

[0014] In the above technical solution, as the core joint area of the prestressed assembled frame structure, the connection between the precast concrete column and the first connecting plate, and the connection between the precast cross beam and the second connecting plate are both formed by bolt locking. The connection method has a simple structure, fast construction speed, good connection bearing performance, and the construction quality is easy to be guaranteed.

[0015] Combined with the first aspect or the first possible implementation manner of the first aspect, in the fifth possible implementation manner of the first aspect of the present application, the precast cross beam includes a third connecting plate, a second profiled steel, a first cast-in-place steel bar frame, and a first cast-in-place concrete body; the first cast-in-place steel bar frame is connected to the third connecting plate, the second profiled steel is connected to the third connecting plate and is located inside the first cast-in-place steel bar frame, and reinforcing stud bolts are fixed on the flange of the second profiled steel; the first cast-in-place steel bar frame and the second profiled steel are arranged in the first cast-in-place concrete body; the third connecting plate is bolt-locked to the precast connecting device.

[0016] In the above technical solution, the precast cross beam can be precast and manufactured in a factory. Reinforcing stud bolts are fixed on the flange of the second profiled steel, which can enhance the connection strength between the first cast-in-place concrete body and the third connecting plate, make the two combine firmly, and avoid the interface between the third connecting plate and the first cast-in-place concrete body from separating and cracking during an earthquake, thereby improving the overall mechanical performance of the precast cross beam.

[0017] Combined with the fifth possible implementation manner of the first aspect, in the sixth possible implementation manner of the first aspect of the present application, the precast cross beam further includes a first embedded pipe for the prestressing tendon to pass through, and the first embedded pipe is located inside the first cast-in-place steel bar frame; the third connecting plate is provided with a second through hole for the prestressing tendon to pass through, and the first embedded pipe is connected to the second through hole.

[0018] In the above technical solution, the prestressing tendon passes through the precast cross beam through the first embedded pipe and the second through hole, avoiding the contact between the prestressing tendon and the concrete, facilitating the threading and tensioning of the prestressing tendon in the longitudinal direction of the cross beam of the prestressed assembled frame structure, enabling the prestressing tendon to be in an elastic state after deforming in the longitudinal direction of the cross beam of the prestressed assembled frame structure, and making the prestressed assembled frame structure have strong flexural stiffness and bearing capacity.

[0019] Combined with the fifth possible implementation manner of the first aspect, in the seventh possible implementation manner of the first aspect of the present application, the precast concrete column includes a second cast-in-place steel bar frame, a square steel pipe, a second embedded pipe, a third embedded pipe, and a second cast-in-place concrete body; the square steel pipe is sleeved on the second cast-in-place steel bar frame; both the second embedded pipe and the third embedded pipe pass 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 the bolts connecting the precast connecting device to pass through; the second cast-in-place steel bar frame, the second embedded pipe, and the third embedded pipe are arranged in the second cast-in-place concrete body.

[0020] In the above technical solution, the precast concrete column can be precast and manufactured in a factory. The square steel pipe serves as the core area of the joint and is used to connect the first connecting plate in the precast connecting device. The third embedded pipe passes through the square steel pipe, facilitating the connection of the square steel pipe and the first connecting plate after the bolt passes through the third embedded pipe. The second embedded pipe passes through the square steel pipe and is arranged corresponding to the first embedded pipe, so that the prestressed tendons pass through the precast concrete column, the precast connecting device, and the precast cross beam in sequence along the length direction of the cross beam of the prestressed assembled frame structure and are fixed on one side of the square steel pipe.

[0021] Combined with the first aspect, in the eighth possible implementation manner of the first aspect of the present application, the prestressed assembled frame structure further includes an anchor; the anchor is used to fix the prestressed tendon to the precast concrete column.

[0022] In the above technical solution, the prestressed tendon is fixed on the square steel pipe of the precast concrete column through the anchor to form a tensile stress.

[0023] In the second aspect, a construction method of a prestressed assembled frame structure is provided. The prestressed assembled frame structure is the prestressed assembled frame structure in the first aspect or any possible implementation manner of the first aspect; the construction method includes the following steps:

[0024] Manufacture precast concrete columns, precast cross beams, and precast connecting devices;

[0025] Fix multiple precast concrete columns on the foundation structure in an array;

[0026] Connect the precast cross beam and the precast connecting device;

[0027] Set the connected precast cross beam and precast connecting device between two adjacent precast concrete columns, and connect the precast connecting device and the precast concrete column through bolts;

[0028] Pass the prestressed tendons through the precast concrete column, the precast connecting device, and the precast cross beam in sequence, arrange anchors at both ends of the prestressed tendons, and tension and then relax and anchor the prestressed tendons through a jack.

[0029] The above technical solution can efficiently manufacture and construct the prestressed assembled frame structure, with convenient construction, high construction quality, and lower cost. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 Schematic diagram of a section of the joint area in a prestressed assembled frame structure in an alternative embodiment of the present application;

[0032] Figure 2 Schematic diagram of the overall structure of a prestressed assembled frame structure in an alternative embodiment of the present application;

[0033] Figure 3 Schematic diagram of a precast concrete column in an alternative embodiment of the present application;

[0034] Figure 4 Schematic diagram of a precast connection device in an alternative embodiment of the present application;

[0035] Figure 5 Schematic diagram of a precast cross beam in an alternative embodiment of the present application;

[0036] Figure 6 is Figure 1 front view of;

[0037] Figure 7 is Figure 6 A - A sectional view in;

[0038] Figure 8 is Figure 6 B - B sectional view in;

[0039] Figure 9 is Figure 6 C - C sectional view in;

[0040] Figure 10 is Figure 6 D - D sectional view in;

[0041] Figure 11 is Figure 6 E - E sectional view in.

[0042] Icon: 1 - precast concrete column; 2 - square steel pipe; 3 - second embedded pipe; 4 - third embedded pipe; 5 - first longitudinal reinforcement; 6 - first stirrup; 7 - second cast - in - place concrete body; 8 - precast connection device; 9 - first connecting plate; 10 - first bolt; 11 - first through - hole; 12 - first section steel; 13 - stiffening rib; 14 - second connecting plate; 15 - second bolt; 16 - second through - hole; 17 - precast cross beam; 18 - third connecting plate; 19 - third through - hole; 20 - second section steel; 21 - strengthening stud; 22 - first embedded pipe; 23 - second longitudinal reinforcement; 24 - second stirrup; 25 - first cast - in - place concrete body; 26 - prestressing tendon; 27 - anchor. Detailed implementation manners

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. Components of the embodiments of this application described and illustrated in the accompanying drawings here can be arranged and designed in a variety of different configurations.

[0044] Therefore, the detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts fall within the scope of protection of this application.

[0045] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0046] In the description of this application, it should be noted that the orientation or positional relationship indicated by terms such as "inside", "below", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is customarily placed. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0047] In the description of this application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] In this application, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being above, on top of, and over the second feature includes the first feature being directly above and diagonally above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being below, beneath, and under the second feature includes the first feature being directly below and diagonally below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0049] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0050] In the current precast concrete structure, the structural damage of components is too large during a major earthquake, the controllability of connection quality is poor, and there is basically no recoverable performance. Moreover, there is wet operation in the joint area during the construction process, the construction method is complex, and the efficiency is low.

[0051] An alternative embodiment of the present application provides a prestressed assembled frame structure. The prestressed assembled frame structure forms a joint area with precast concrete columns 1, precast cross beams 17, and precast connection devices 8 as the main structural components. The above components are all mass-produced and refined in the factory. After splicing on site, local welding and overall additional prestress can complete the construction. The construction is simple, safe and efficient, and the on-site workload is small. The prestressed assembled frame structure can guide the deformation to concentrate on the precast connection device 8, which is convenient for forming a favorable failure mode in the seismic design. During the deformation process of the whole structure, the prestressed tendons 26 are always in the elastic stage, so that the structural damage of the main components of the prestressed assembled frame structure after the earthquake is small, and it does not need to be repaired or can be quickly put into use or production after simple repair, which can truly achieve the repairability in the medium earthquake in the seismic fortification goal, and even the repairability in the major earthquake, ensuring the safety of people and property during the earthquake, and having good social benefits, economic benefits, good engineering application value and popularization and application prospects.

[0052] Please also refer to Figure 1 、 Figure 2 and Figure 6 。 Figure 1 shows the specific structure of a section of the joint area in the prestressed assembled frame structure provided by an alternative embodiment of the present application. Figure 2 shows the specific structure of the whole prestressed assembled frame structure provided by an alternative embodiment of the present application. Figure 6 is Figure 1 front view.

[0053] As Figure 1 shown, a prestressed assembled frame structure is composed of a precast concrete column 1, two precast connection devices 8, two precast cross beams 17, and prestressed tendons 26 in the same straight line direction in the horizontal plane to form a section of the joint area. The prestressed tendons 26 sequentially pass through one of the precast cross beams 17, one of the precast connection devices 8, the precast concrete column 1, the other precast connection device 8, and the other precast cross beam 17.

[0054] Please also refer to Figure 2, at the construction site, multiple precast concrete columns 1 are arranged in an array. Along the vertical direction of each precast concrete column 1, multiple precast connecting devices 8 can be arranged at intervals. And between every two adjacent precast concrete columns 1, a precast cross beam 17 and two precast connecting devices 8 are arranged along the same horizontal plane, finally forming an overall multi-layer prestressed assembled frame structure in a horizontal and vertical pattern, which is applicable to building construction with different structural requirements. Among them, the precast concrete column 1 located at the outer edge end of the prestressed assembled frame structure serves as the anchorage point of the prestressed tendon 26. The two ends of the prestressed tendon 26 are respectively anchored on the square steel tubes 2 of the two precast concrete columns 1 located in the front and back as shown in Figure 2 by means of anchor devices 27 to form a tensile stress. In the embodiment of the present application, the prestressed tendon 26 is a prestressed steel strand or a prestressed steel bar, and the anchor device 27 can be a wedge anchor, a headed anchor or a nut.

[0055] The prestressed assembled frame structure bears vibration deformation through the precast connecting device 8, and can dissipate energy during the plastic deformation process of the precast connecting device 8. The prestressed assembled frame structure guides the deformation to concentrate at the precast connecting device 8, which is convenient for forming a favorable failure mode in seismic design. The overall force is clear and it has good seismic performance. The flexural bearing capacity of the overall frame is enhanced through the prestressed tendon 26 to prevent the interface between the third connecting plates 18 on both sides and the first cast-in-place concrete body 25 in the precast cross beam 17 from cracking prematurely under earthquake action. In the prestressed assembled frame structure, only deformation or damage occurs at the precast connecting device 8 under earthquake action (the failure mode of this connection method is that the flange of the first connecting plate 9 and the first section steel 12 yields), and the main components are basically not damaged. The overall structure has clear force, good seismic performance, and certain recoverable performance. The precast concrete column 1, the precast cross beam 17 and the precast connecting device 8 can all be precast in advance and can be quickly assembled on site, effectively improving the construction efficiency of the prestressed assembled frame structure. The precast cross beam 17, the precast connecting device 8 and the precast concrete column 1 are all connected in a detachable manner (for the specific connection method, please refer to the following description). After the earthquake, the structural damage of the main components is small, and the damaged section can be quickly replaced and repaired after the earthquake, so that the prestressed assembled frame structure can be repaired after an earthquake, and even can be repaired after a major earthquake, ensuring the safety of people and property during the earthquake, and having good social and economic benefits, as well as good engineering application value and popularization and application prospects.

[0056] Please continue to refer to Figure 3 and Figure 11 . Figure 3 shows the specific structure of the precast concrete column 1 provided by an alternative embodiment of the present application; Figure 11 is Figure 6 the cross-sectional view in the E-E direction in

[0057] The precast concrete column 1 includes a second cast-in-place steel reinforcement frame, a square steel pipe 2, a second embedded pipe 3, a third embedded pipe 4, and a second cast-in-place concrete body 7.

[0058] The second cast-in-place steel reinforcement frame is a steel reinforcement skeleton formed by binding a plurality of first longitudinal bars 5 and a plurality of first stirrups 6. The number of the first longitudinal bars 5 is not less than four. The first longitudinal bars 5 are arranged at intervals and extend in the vertical direction. The first stirrups 6 are sleeved outside the first longitudinal bars 5. A plurality of the first stirrups 6 are equidistantly arranged at intervals in the vertical direction. The first stirrups 6 can be selected in the form of non-composite stirrups or composite stirrups. The second cast-in-place steel reinforcement frame extends in the vertical direction. The square steel pipe 2 is sleeved on the second cast-in-place steel reinforcement frame, and the vertical length of the square steel pipe 2 is not less than the height of the first connecting plate 9 in the precast connecting device 8 (please refer to Figure 4 shown).

[0059] In the embodiment of the present application, the second embedded pipe 3 is a corrugated pipe, and the third embedded pipe 4 is a PVC (Polyvinylchloride) pipe. Holes are formed on both sides of the square steel pipe 2 to facilitate the embedding of the second embedded pipe 3 and the third embedded pipe 4. The second embedded pipe 3 and the third embedded pipe 4 are both arranged in parallel in the square steel pipe 2, and the length direction is parallel to the length direction of the precast cross beam 17 (please refer to Figure 1 or Figure 2 shown), and the 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 prestressed tendon 26 (please refer to Figure 1 shown) to pass through, and the pipe diameter of the second embedded pipe 3 is slightly larger than the diameter of the prestressed tendon 26. The third embedded pipe 4 is used for the bolt 1 of connecting the precast connecting device 8 (please refer to Figure 4 shown) to pass through, and the pipe diameter of the third embedded pipe 4 is slightly larger than the diameter of the bolt 1.

[0060] The second cast-in-place steel reinforcement frame, the second embedded pipe 3, and the third embedded pipe 4 are arranged in the second cast-in-place concrete body 7 to form the precast concrete column 1. The second cast-in-place concrete body 7 can be filled and cast by using ordinary concrete, recycled concrete or high-strength concrete for formwork.

[0061] The precast concrete column 1 can be precast and manufactured in a factory. The square steel pipe 2 serves as the joint core area of the prestressed assembly frame structure and is used to connect the first connecting plate 9 in the precast connecting device 8. Among them, the third embedded pipe 4 passes through the square steel pipe 2, so that it is convenient to connect the square steel pipe 2 and the first connecting plate 9 after the bolt passes through the third embedded pipe 4. The second embedded pipe 3 passes through the square steel pipe 2 and is arranged corresponding to the first embedded pipe 22 (please refer to Figure 5 shown), so that the prestressed tendon 26 can pass through the precast concrete column 1, the precast connecting device 8, and the precast cross beam 17 in sequence along the length direction of the cross beam of the prestressed assembly frame structure and be fixed on one side of the square steel pipe 2.

[0062] Please continue to refer to Figure 4 、 Figure 7 and Figure 8 。 Figure 4 Figure 8 shows the specific structure of the prefabricated connection device 8 provided by an alternative embodiment of the present application; Figure 7 and Figure 8 are respectively Figure 6 the sectional view taken along line A-A and the sectional view taken along line B-B in

[0063] The prefabricated connection device 8 includes 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 can be an H-section steel or an I-beam, and the stiffening rib 13 is a right-angled triangular steel plate.

[0064] One end of the first section steel 12 is welded to the central position of the first connecting plate 9, and the other end of the first section steel 12 is welded to the central position of the second connecting plate 14, so that the web of the first section steel 12 is perpendicular to the first connecting plate 9 and the second connecting plate 14 respectively. A total of one stiffening rib 13 is provided on each of the upper and lower flanges of the first section steel 12, and the two right-angled sides of the stiffening rib 13 are respectively welded to the flange of the first section steel 12 and the plate surface of the first connecting plate 9. The stiffening rib 13 can enhance the overall connection strength of the prefabricated connection device 8. When a major earthquake occurs, the flange of the first section steel 12 will yield and flash out, causing plastic deformation to dissipate energy, thereby forming a favorable failure mode in seismic design. After simple repair of the prefabricated connection device 8, it can be quickly put into use or production, ensuring the controllability of the connection quality.

[0065] The thickness of the first connecting plate 9 is obtained through theoretical calculation and is generally relatively thin. A plurality of first bolts 10 are provided on the side of the first connecting plate 9 away from the first section steel 12. The plurality of first bolts 10 are symmetrically arranged uniformly on the first connecting plate 9 and correspond to the positions of the third embedded pipes 4 (please refer to Figure 3 shown) on the square steel pipe 2.

[0066] The sectional dimension of the second connecting plate 14 is larger than the sectional dimension of the prefabricated cross beam 17 (please refer to Figure 1 shown). A plurality of second bolts 15 are provided on the side of the second connecting plate 14 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 arranged symmetrically and uniformly on the first and second connecting plates.

[0067] Both the first connecting plate 9 and the second connecting plate 14 are provided with first through holes for the prestressing tendon 26 to pass through. The first through holes include 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 prestressing tendon 26 passes through the prefabricated connecting device 8 through the first through hole, facilitating the threading of the prestressing tendon 26, enabling the prestressing tendon 26 to be in an elastic state after deforming along the length direction of the cross beam of the prestressed assembly frame structure, and endowing the prestressed assembly frame structure with strong flexural stiffness and load-bearing capacity.

[0068] The first connecting plate 9 is locked to the square steel pipe 2 of the precast concrete column 1 by a first bolt 10, and the second connecting plate 14 is locked to the precast cross beam 17 by a second bolt 15, enabling the rapid assembly connection of the prefabricated connecting device 8 to the precast concrete column 1 and the precast cross beam 17 respectively. As the core joint area of the prestressed assembly frame structure, the connection between the precast concrete column 1 and the first connecting plate 9, and the connection between the precast cross beam 17 and the second connecting plate 14 are both formed by bolt locking. The connection method has a simple structure, fast construction speed, good connection load-bearing performance, and the construction quality is easily guaranteed.

[0069] Please continue to refer to Figure 5 、 Figure 9 and Figure 10 。 Figure 5 shows the specific structure of the precast cross beam 17 provided by an alternative embodiment of the present application; Figure 9 and Figure 10 are respectively Figure 6 the sectional view in the C-C direction and the sectional view in the D-D direction in

[0070] The precast cross beam 17 includes a third connecting plate 18, a second section steel 20, a first cast-in-place steel bar frame, a first cast-in-place concrete body 25, and a first embedded pipe 22 for the prestressing tendon 26 to pass through. In the embodiment of the present application, the second section steel 20 can be an H-shaped steel or an I-shaped steel. The first cast-in-place concrete body 25 can be filled and cast by using ordinary concrete, recycled concrete, or high-strength concrete for formwork support. The first embedded pipe 22 is a corrugated pipe.

[0071] The first cast-in-place steel bar frame is formed by longitudinal bars two 23 and stirrups two 24. The longitudinal bars two 23 extend along the length direction of the precast cross beam 17, and the ends of multiple longitudinal bars two 23 are welded at fixed positions on the inner side of the third connecting plate 18. Multiple stirrups two 24 are sleeved outside the longitudinal bars two 23 and arranged at equal intervals.

[0072] One end of the second steel section 20 is welded to the center of the third connecting plate 18 and is located in the middle of the multiple longitudinal bars 23 arranged at intervals from top to bottom. Multiple reinforcing bolts 21 are welded to the upper flange plate and the lower flange plate of the second steel section 20. The reinforcing bolts 21 can enhance the connection strength between the first cast concrete body 25 and the third connecting plate 18, making the two firmly combined, and avoiding the interface between the third connecting plate 18 and the first cast concrete body 25 from being separated prematurely during an earthquake, thereby improving the overall force performance of the prefabricated cross beam 17.

[0073] The third connecting plate 18 is provided with a second through hole (not shown in the figure) for the prestressed tendon 26 to pass through. The first embedded pipe 22 extends along the length direction of the prefabricated cross beam 17 and is connected to the second through hole. The second through hole is arranged corresponding to the second through hole 16 (please refer to Figure 4 shown), so that the prestressed tendons 26 can be assembled in the prestressed frame structure (please refer to Figure 2 shown) on one side, passes through the second embedded pipe 3, through hole 11, through hole 2 16, and first embedded pipe 22 in sequence until it passes through the precast concrete column 1 on the other side. The prestressed tendons 26 pass through the precast crossbeam 17 through the first embedded pipe 22 and the second through hole, avoiding contact between the prestressed tendons 26 and the concrete, facilitating the connection and tensioning of the prestressed tendons 26 in the length direction of the crossbeam of the prestressed assembly frame structure, allowing the prestressed tendons 26 to be in an elastic state after deformation in the length direction of the crossbeam of the prestressed assembly frame structure, so that the prestressed tendons 26 have strong bending stiffness and bearing capacity.

[0074] The width and height of the third connecting plate 18 are both larger than the width and height of the middle part of the precast beam 17 after casting. A row of through holes 19 is respectively provided on the upper and lower sides of the third connecting plate 18, and the first casting steel bar frame is located in the middle of the two rows of through holes 19. The through hole 19 corresponds to the bolt 2 15 (please refer to Figure 4 ) is set, during installation, the third connecting plate 18 and the second connecting plate 14 (please refer to Figure 4 As shown) is connected by bolt 2 15.

[0075] The first cast steel frame and the second steel section 20 are arranged in the first cast concrete body 25 to form a prefabricated beam 17.

[0076] An optional embodiment of the present application also provides a construction method for a prestressed assembly frame structure, the construction method comprising the following steps:

[0077] (1) Prefabricating the precast concrete columns 1, precast beams 17 and precast connecting devices 8 in the factory.

[0078] ​​​​For the precast concrete column 1, first bind the longitudinal bars one 5 and stirrups one 6 to form the second casting steel bar framework, then sleeve the square steel pipe 2, insert the second embedded pipe 3 and the third embedded pipe 4, fix the distance between the square steel pipe 2 and the second casting steel bar framework, and form the second casting concrete body 7 by formwork and pouring concrete, so as to complete the prefabrication of the precast concrete column 1.

[0079] For the precast cross beam 17, first weld the third connecting plate 18 to one end of the second section steel 20, and weld the strengthening stud 21 on the upper flange plate and the lower flange plate of the second section steel 20. Then weld the end of the longitudinal bars two 23 to the third connecting plate 18, and sleeve the stirrups two 24 outside the longitudinal bars two 23 and arrange them at equal intervals. Then insert the first embedded pipe 22, and form the first casting concrete body 25 by formwork and pouring concrete, so as to complete the prefabrication of the precast cross beam 17.

[0080] For the precast connecting device 8, weld the first connecting plate 9 and the second connecting plate 14 to both ends of the first section steel 12 respectively, and weld the stiffening ribs 13 between the upper and lower flanges of the first connecting plate 9 and the first section steel 12. Then set the through hole one 11 and the through hole two 16 at the fixed positions of the first connecting plate 9 and the second connecting plate 14, and drill holes on the first connecting plate 9 and the second connecting plate 14 respectively to arrange the bolt one 10 and the bolt two 15. The positions of the through hole one 11 and the through hole two 16 correspond to each other, and the diameters of both are slightly larger than the diameter of the prestressed tendon 26.

[0081] (2) Fix multiple precast concrete columns 1 on the foundation structure at the construction site in an array.

[0082] (3) Connect the precast cross beam 17 and the precast connecting device 8. Connect the second connecting plate 14 and the third connecting plate 18 through the bolt two 15, and use a torque wrench to tighten each bolt two 15 to the calculated torque value to ensure the reliability of the connection.

[0083] (4) Lift the combined body of the connected precast cross beam 17 and the precast connecting device 8 to the fixed position between two adjacent precast concrete columns 1, and then pass the bolt one 10 through the third embedded pipe 4 and tighten it with a torque wrench to the calculated torque value.

[0084] (5) Repeat the above steps (3)-(4) to gradually complete the construction of the overall preliminary non-tensioned prestressed stage of the prestressed assembled frame structure.

[0085] (6) Pass the prestressed tendon 26 through the second embedded pipe 3, the through hole one 11, the through hole two 16 and the first embedded pipe 22 in sequence from one side of the prestressed assembled frame structure until it passes through from the other side of the prestressed assembled frame structure.

[0086] Then, arrange the anchor devices 27 on both sides of the pre-stressed assembled frame structure, use a hole-through jack to tension the pre-stressed tendons 26 to the designed initial pre-stress value, and then release the tension and anchor them to complete the construction of the overall structure.

[0087] Using the above construction method for the construction of the pre-stressed assembled frame structure can efficiently fabricate and construct the pre-stressed assembled frame structure on-site, with convenient construction, high construction quality and lower cost.

[0088] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A prestressed assembly frame structure, characterized in that: The prestressed assembly frame structure includes prefabricated concrete columns, prefabricated beams, prefabricated connecting devices and prestressed tendons; The end surface of the prefabricated cross beam is detachably connected to the prefabricated connecting device; One end of the prefabricated connecting device away from the prefabricated cross beam is detachably connected to the prefabricated concrete column; The prestressed tendons sequentially pass through the precast concrete column, the precast connecting device and the precast cross beam and are fixed to the precast concrete column, wherein the precast connecting device is used to bear vibration deformation; The prefabricated connection device comprises a first connection plate, a second connection plate, a first steel section and a stiffening rib; Two ends of the first steel section 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 steel section 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; The prefabricated cross beam comprises a third connecting plate, a second steel section, a first cast steel reinforcement frame and a first cast concrete body; The first cast steel frame is connected to the third connection plate, the second steel section is connected to the third connection plate and is located in the first cast steel frame, and the flange of the second steel section is fixed with a reinforcement bolt; The first cast steel bar frame and the second steel section are arranged in the first cast concrete body; The third connecting plate is fastened to the prefabricated connecting device by means of bolts.

2. The prestressed assembly frame structure according to claim 1 is characterized in that: The prestressed assembly frame structure comprises a plurality of precast concrete columns; A plurality of said precast concrete columns are arranged in an array; Each of the prefabricated concrete columns is detachably connected to a plurality of the prefabricated connection devices at intervals along the vertical direction.

3. The prestressed assembly frame structure according to claim 1 is characterized in that: The first connecting plate and the second connecting plate are both provided with a first through hole for the prestressed tendons to pass through.

4. The prestressed assembly frame structure according to claim 1 is characterized in that: The first connecting plate is fastened to the precast concrete column by bolts, and the second connecting plate is fastened to the precast cross beam by bolts.

5. The prestressed assembly frame structure according to claim 1 is characterized in that: The prefabricated cross beam further comprises a first embedded pipe for the prestressed tendons to pass through, the first embedded pipe being located in the first cast 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.

6. The prestressed assembly frame structure according to claim 5, characterized in that: The precast concrete column comprises a second cast steel bar frame, a square steel pipe, a second embedded pipe, a third embedded pipe and a second cast concrete body; The square steel pipe is sleeved on the second cast steel bar frame; The second embedded pipe and the third embedded pipe both pass 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 the bolts connecting the prefabricated connecting device to pass through; The second cast steel bar frame, the second embedded pipe and the third embedded pipe are arranged in the second cast concrete body.

7. The prestressed assembly frame structure according to claim 1, characterized in that: The prestressed assembly frame structure also includes an anchor; The anchor is used to fix the prestressed tendons to the precast concrete columns.

8. A construction method for a prestressed assembly frame structure, characterized in that: The prestressed assembly frame structure is the prestressed assembly frame structure according to any one of claims 1 to 7, and the construction method comprises the following steps: manufacturing the precast concrete columns, the precast beams and the precast connecting devices; Fixing a plurality of said precast concrete columns in an array on a foundation structure; connecting the prefabricated cross beam and the prefabricated connecting device; The connected prefabricated cross beam and the prefabricated connecting device are arranged between two adjacent prefabricated concrete columns, and the prefabricated connecting device and the prefabricated concrete column are connected by bolts; The prestressed tendons are passed through the precast concrete columns, the precast connecting devices and the precast cross beams in sequence, anchors are arranged at both ends of the prestressed tendons, and the prestressed tendons are tensioned and anchored after being tensioned by jacks.

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