Lateral force resisting frame composed of steel reinforced concrete columns and prestressed concrete beams and construction method
By combining steel-concrete columns and prestressed concrete beams, the complex construction and high cost caused by the mixed setting of steel and reinforcing bars in steel beams are solved, achieving the effect of simplifying construction procedures and reducing costs.
Patent Information
- Application Number
- CN202511068022.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-31
- Publication Date
- 2025-11-04
AI Technical Summary
The mixed use of structural steel and reinforcing steel in steel beams leads to complex construction, difficult node connections, and high overall costs.
The structure uses steel-concrete composite columns and prestressed concrete beams. The prestressed pipes pass through the steel-concrete composite columns and are connected by anchors, which simplifies the construction process and requires only a single steel reinforcement trade to complete the node connections.
It simplified the construction process, reduced costs and construction time, improved construction quality, and lowered the overall cost.
Smart Images
Figure CN120889346A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of structural engineering, and particularly relates to a lateral force resisting frame composed of a steel-concrete column and a prestressed concrete beam and a construction method. BACKGROUND
[0002] The statements in this section merely provide background information related to the present application and do not necessarily constitute the prior art.
[0003] Large-span structures generally appear at the floor and roof positions of public buildings such as conference rooms, report halls, atriums, theaters, cinemas, restaurants and weather playgrounds, with a span of 20-35 meters. The large-span structure is mostly a frame concrete (concrete is abbreviated as concrete) structural system, and the main design goal thereof is to reduce the self weight, control the deflection and cracks, and meet the better floor comfort requirements.
[0004] To achieve the above requirements, a large-span prestressed steel-concrete composite structure is disclosed in the prior art, which comprises frame columns and beams, and the frame columns and beams are both made of a steel-concrete composite structure, and the beams are made by post-tensioning. The tensile capacity and bearing capacity of the concrete when bearing the load are improved by prestressed design, the emergence of cracks is prevented or delayed, and the stiffness of the structure is increased, thereby optimizing the cross-sectional size and saving the material usage.
[0005] The above scheme has the following problems: In the steel-concrete structure, the steel in the steel-concrete beam is mixedly arranged with the steel bars, when the beam end is rigidly connected, the steel needs to be also embedded in the column, and there is an alternation of two types of workers, which leads to the problems of complex construction in the aspects of hoisting, node connection, concrete pouring and the like, and high cost in terms of cost, and the material cost and construction measure cost of the steel-concrete beam are high, so that the comprehensive cost is high. SUMMARY
[0006] In view of this, the purpose of the present application is to provide a lateral force resisting frame composed of a steel-concrete column and a prestressed concrete beam and a construction method, and the structural composition of the lateral force resisting frame can solve the problems in the prior art that the steel in the steel-concrete beam is mixedly arranged with the steel bars, leading to complex construction in the aspects of hoisting, node connection, concrete pouring and the like, and high cost.
[0007] To achieve the above purpose, the present application adopts the following technical scheme: In a first aspect, a lateral force resisting frame composed of a steel-concrete column and a prestressed concrete beam is provided, which comprises a prestressed concrete beam and a steel-concrete column, a prestressed pipe is integrally poured in the prestressed concrete beam, and the two ends of the prestressed pipe pass through the steel-concrete column; A plurality of prestressed pipes are symmetrically arranged along the axial direction of the prestressed concrete beam, the middle part of the prestressed pipe is located at the bottom of the middle section of the prestressed concrete beam, and a single prestressed pipe is symmetrically arranged relative to the axial midpoint of the prestressed concrete beam; and the bottom mold of the middle section of the prestressed concrete beam is arranged in an arch shape before pouring; The steel-concrete column comprises a column steel, an anchorage device arranged at the end of a prestressed pipe penetrating through the column steel, and a prestressed tendon penetrating through the prestressed pipe and connected with the anchorage device; the column steel comprises a cross web and a first flange plate at the end of the cross web, the first flange plate is a narrow flange plate, and the prestressed pipe penetrates through the cross web from both sides of the first flange plate. Preferably, the prestressed concrete beam further comprises a plurality of beam bottom tendons, a plurality of beam top tendons, and a plurality of beam stirrups arranged along the beam axis, the beam bottom tendons, the beam top tendons and the beam stirrups being fixedly bound; the steel-concrete column further comprises a plurality of column longitudinal tendons uniformly distributed on the outer periphery of the column steel, a plurality of column stirrups arranged along the column axis, and the column longitudinal tendons and the column stirrups being fixedly bound.
[0008] Preferably, the cross web is composed of a first web and a second web fixedly connected with each other, the first web is parallel to the prestressed concrete beam, the second flange plate is fixed on the first web, and the second flange plate is located inside the first flange plate.
[0009] Preferably, the prestressed pipe is parallel to the first web and located below the beam top tendon, the second web is provided with a through hole at a corresponding position, the through hole being used for the penetration of the prestressed pipe through the second web, and a reinforcing ring plate is attached and welded on both sides of the through hole of the second web.
[0010] Preferably, the column steel is provided with a reinforcing rib plate at the level of the beam top tendon and the beam bottom tendon, the reinforcing rib plate is fixedly connected with the first flange plate, the second flange plate and the cross web, and the beam top tendon penetrates into the steel-concrete column and is fixedly welded to the top surface of the reinforcing rib plate of the column steel.
[0011] Preferably, at the level of the beam bottom tendon, a steel tendon connecting plate is fixed to the outside of the first flange plate at the end of the first web, the beam bottom tendon is fixed to the top surface of the steel tendon connecting plate or penetrates into the steel-concrete column from both sides of the flange plate and is fixedly welded to the top surface of the reinforcing rib plate at the level of the beam bottom tendon.
[0012] Preferably, when the lateral force resisting frame is a single-span frame, the beam-column connection joint is a T-shaped joint, the prestressed pipe is provided with an anchorage device on the side of the steel-concrete column away from the prestressed concrete beam in the T-shaped joint, and after tensioning, the anchorage device at the tensioning and sealing end is sealed to form a sealing and anchoring joint.
[0013] Preferably, when the lateral force resisting frame is a multi-span frame, the beam-column connection joint is a cross joint, the cross joint is provided with a tensioning groove outside the densified area of the beam stirrups of the adjacent span, and the two ends of the prestressed pipe extend into the tensioning grooves of the adjacent span to seal the anchorage.
[0014] Preferably, additional longitudinal tendons are arranged around the tensioning groove to strengthen the strength of the beam body around the tensioning groove, and a plurality of anti-splitting tendons are arranged in the densified area of the beam stirrups of the adjacent span near the anchorage device.
[0015] In the second aspect, a construction method of a lateral force resisting frame composed of the steel-concrete column and the prestressed concrete beam is provided, and the specific steps are as follows: The column-shaped steel is prepared in advance, the first flange plate, the second flange plate, the reinforcing rib plate and the steel bar connecting plate are fixed on the cross web plate; The column-shaped steel is installed, the column longitudinal reinforcement and the column hoop reinforcement are tied, the connecting joint with the prestressed concrete beam is reserved, the formwork of the steel concrete column is set, and pouring is carried out; When the strength of the steel concrete column reaches the standard, the beam bottom formwork is set, the beam is arched at the middle segment position, and the beam bottom elevation is corrected; the beam bottom reinforcement, the beam hoop reinforcement and the beam top reinforcement are tied, and the beam bottom reinforcement and the beam top reinforcement are connected with the column-shaped steel; The prestressed pipe position is positioned, the prestressed pipe is laid and installed, and the prestressed reinforcement is arranged in the prestressed pipe; the tensioning and anchoring ends and the fixed end are made; the formwork is set, and the prestressed concrete beam is poured; When the strength of the prestressed concrete beam reaches the requirement, the formwork is removed, the prestressed reinforcement is tensioned, the prestressed reinforcement is locked after reaching the tensioning requirement, the prestressed pipe is grouted, and the two ends of the prestressed pipe are anchored.
[0016] Compared with the prior art, the application has the advantages and positive effects that: The anti-lateral force frame in the application is composed of a steel concrete column and a prestressed concrete beam. The column-shaped steel is prepared in advance. When the joint connection of the steel concrete column and the prestressed concrete beam is performed, only the reinforcement cage of the prestressed concrete beam needs to be tied and positioned, the prestressed pipe is laid and installed, the two ends of the prestressed pipe pass through the column-shaped steel, the beam reinforcement is welded and fixed with the column-shaped steel, the formwork can be set and poured, the prestressed reinforcement is tensioned when the strength of the concrete reaches the standard, and finally grouting and anchoring are performed. In this process, only a single type of reinforcement worker is needed to complete the joint connection and setting, the construction process can be simplified, the cost and construction period can be reduced, and the construction quality can be improved. The reinforcement is relatively cheaper than the column-shaped steel, the construction measure cost is lower, and the comprehensive cost can be reduced. BRIEF DESCRIPTION OF DRAWINGS
[0017] The drawings accompanying the specification of the application form a part of the application and serve to provide further understanding of the application. The exemplary embodiments of the application and their descriptions serve to explain the application, and do not constitute an improper limitation on the application.
[0018] Figure 1 is a front view of a single-span frame in the anti-lateral force frame of the embodiment 1 or 2 of the application; Figure 2 is a bottom view of a T-shaped joint of the single-span frame of the embodiment 1 or 2 of the application; Figure 3 is a top view of the T-shaped joint of the single-span frame of the embodiment 1 or 2 of the application; Figure 4 is a front view of the T-shaped joint of the single-span frame of the embodiment 1 or 2 of the application; Figure 5is a front view of a multi-span frame in the lateral force resisting frame of embodiments 1 or 2 of the present invention; Figure 6 is a bottom view of a cross node of a multi-span frame of embodiments 1 or 2 of the present invention; Figure 7 is a top view of a cross node of a multi-span frame of embodiments 1 or 2 of the present invention; Figure 8 is a front view of a cross node of a multi-span frame of embodiments 1 or 2 of the present invention; Figure 9 is a schematic view of the arrangement of stiffening ribbed slabs of the split type rectangular slab in a T node of embodiments 1 or 2 of the present invention; Figure 10 is a schematic view of the arrangement of stiffening ribbed slabs of the split type rectangular slab in a cross node of embodiments 1 or 2 of the present invention; In the figure: 1, beam bottom bar; 2, prestressed pipe; 3, beam hoop bar; 4, beam top bar; 5, exhaust pipe; 6, column hoop bar; 7, column longitudinal bar; 8, column section steel; 9, second flange plate; 10, reinforcing bar connecting plate; 11, stiffening ribbed slab; 12, sealed anchor node; 13, anchor; 14, additional longitudinal bar; 15, tensioning groove; 16, anti-splitting bar; 17, reinforcing bar connector; 18, anti-shear bolt; 19, reinforcing ring plate. DETAILED DESCRIPTION
[0019] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the invention pertains.
[0020] The present invention will be described in detail below with reference to the accompanying drawings.
[0021] Embodiment 1 The lateral force resisting frame disclosed in this embodiment is composed of a section steel concrete column and a prestressed concrete beam, as shown in Figure 1 , Figure 5 The lateral force resisting frame disclosed in this embodiment is composed of a section steel concrete column and a prestressed concrete beam, as shown in
[0022] As shown in Figure 1 , Figure 5As shown, the plurality of prestressed pipes 2 are symmetrically arranged along the axial direction of the prestressed concrete beam, and the middle part of each prestressed pipe 2 is located at the bottom of the middle section of the prestressed concrete beam, and the single prestressed pipe is symmetrically arranged relative to the axial midpoint of the prestressed concrete beam; thereby in space, the prestressed pipe 2 forms a double-symmetrical structure, ensuring that the prestressed tension is uniformly distributed during tensioning. The prestressed tendon is arranged in the prestressed pipe 2, and after the pouring and curing of the steel reinforced concrete column and the prestressed concrete beam are completed, when the concrete strength reaches the requirement, the prestressed tendon is applied with tensioning prestress. In the embodiment, two prestressed pipes 2 are arranged.
[0023] In addition, before the prestressed concrete beam is poured, the bottom mold of the middle section of the prestressed concrete beam is arched to enable the prestressed tendon tensioning anti-arch effect to effectively reduce the equivalent bending moment effect of the prestressed concrete beam, thereby reducing the mid-span deflection.
[0024] As shown in Figure 1 , Figure 5 , the steel reinforced concrete column includes a column-shaped steel 8, and the end of the prestressed pipe 2 needs to pass through the column-shaped steel 8 for anchoring; as shown in Figure 3 , Figure 7 , the column-shaped steel 8 includes a cross web and a first flange plate at the end of the cross web, in order to avoid the strength of the first flange plate being reduced due to the passage of the prestressed pipe 2, the first flange plate is arranged as a narrow flange plate in the embodiment, so that the prestressed pipe 2 passes through the cross web from both sides of the first flange plate.
[0025] In the embodiment, the lateral force resisting frame is composed of a steel reinforced concrete column and a prestressed concrete beam, in terms of deflection control, the prestressed concrete beam enables more compressive zone concrete to participate in the calculation of the bending stiffness of the beam due to the pre-compression effect of the prestressed tendon on the tensile zone concrete, thereby improving the overall bending stiffness of the beam.
[0026] In addition, since the middle part of the prestressed pipe 2 is located at the bottom of the middle section of the prestressed concrete beam, and the two ends of the prestressed pipe 2 are symmetrically arranged at the top of the two ends of the prestressed concrete beam, the prestressed tendon tensioning anti-arch effect can effectively reduce the equivalent bending moment effect of the beam, thereby reducing the mid-span deflection, and the deflection control efficiency is higher than that of ordinary beams, steel beams and steel reinforced concrete beams; in terms of crack control, the prestressed concrete beam can directly apply compressive stress to the tensile zone concrete, thereby further reducing the tensile strain and crack width of the concrete. Compared with ordinary beams, steel beams and steel reinforced concrete beams, the prestressed concrete beam is more directly and effectively for reducing the crack width of the beam.
[0027] As shown in Figure 1 , Figure 5As shown in the figure, the prestressed concrete beam further comprises beam main reinforcement, which comprises a plurality of beam bottom reinforcement 1 and a plurality of beam top reinforcement 4, wherein the beam bottom reinforcement 1 is arranged at the bottom of the prestressed concrete beam, and the beam top reinforcement 4 is arranged at the top of the prestressed concrete beam; a plurality of beam hoop reinforcement 3 is arranged along the axial direction of the beam, and the beam bottom reinforcement 1, the beam top reinforcement 4 and the beam hoop reinforcement 3 are tied together to form a reinforcement cage of the prestressed concrete beam. In the reinforcement cage of the prestressed concrete beam, two prestressed pipes 2 are tied at the preset positions.
[0028] As shown in the figure, Figure 1 , Figure 4 , Figure 5 , Figure 7 As shown in the figure, the steel concrete column further comprises a plurality of column longitudinal reinforcement 7, which are uniformly distributed and arranged on the outer side of the column steel 8 in the circumferential direction, and a plurality of column hoop reinforcement 6 is arranged along the axial direction of the steel concrete column, and the column longitudinal reinforcement 7 and the column hoop reinforcement 6 are tied together.
[0029] As shown in the figure, Figure 3 , Figure 7 The cross web plate is composed of a first web plate and a second web plate which are fixedly connected by being perpendicular to each other, wherein the first web plate is arranged parallel to the prestressed concrete beam, and the second web plate is arranged perpendicular to the prestressed concrete beam. The second flange plate 9 is fixedly connected to the inner side of the first flange plate, and the size and shape of the second flange plate 9 are consistent with those of the first flange plate; the second flange plate 9 is arranged on the first web plate, and is used to enhance the strength of the first web plate which is parallel to the prestressed pipe 2. This is because the direction of the prestressed concrete beam is the large-span direction, and the node of the prestressed concrete beam and the steel concrete column bears a large force, and the arrangement of the second flange plate 9 can enhance the strength of the connection between the steel concrete column and the prestressed concrete beam.
[0030] As shown in the figure, Figure 3 , Figure 7 The prestressed pipe 2 is located below the beam top reinforcement and parallel to the first web plate, and the displacement of the prestressed pipe 2 is limited by the first flange plate and the second flange plate 9 on the first web plate, and the first flange plate on the second web plate; therefore, the second flange plate 9 can also play an auxiliary limiting role on the prestressed pipe 2.
[0031] In this embodiment, a through hole is formed in the corresponding position of the second web plate in advance, for the prestressed pipe 2 to pass through the second web plate; as shown in the figure, Figure 3 , Figure 7 In order to enhance the strength of the second web plate, a reinforcing ring plate 19 is attached and welded on both sides of the through hole of the second web plate.
[0032] As shown in the figure, Figures 1 to 8As shown, when the shaped steel concrete column is connected with the prestressed concrete beam, the beam bottom reinforcement 1 and the beam top reinforcement 4 need to extend into the shaped steel concrete column for fixation; after the beam top reinforcement 4 is inserted into the shaped steel concrete column, the beam top reinforcement 4 is bent downward and anchored into the shaped steel concrete column, and the column longitudinal reinforcement 7 is bent at the top of the shaped steel concrete column and anchored toward the inner side of the column, wherein the column longitudinal reinforcement 7 away from the prestressed concrete beam is bent and anchored into the prestressed concrete beam, so as to ensure the connection strength of the prestressed concrete beam and the shaped steel concrete column.
[0033] As shown in Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 8 As shown, the column shaped steel 8 is welded and fixed with the reinforcing rib plate 11 at the beam bottom reinforcement and beam top reinforcement elevations, and the reinforcing rib plate 11 is fixedly connected with the first flange plate, the second flange plate 9 and the cross web; the reinforcing rib plate 11 is used to strengthen the connection between the first flange plate, the second flange plate 9 and the cross web; the beam top reinforcement 4 extends into the shaped steel concrete column and is welded and fixed with the top surface of the reinforcing rib plate 11 of the column shaped steel 8.
[0034] In some embodiments, the reinforcing rib plate 11 is replaced by a segmented rectangular plate as shown in Figure 9 , Figure 10 which can facilitate construction.
[0035] In the present embodiment, at the beam bottom reinforcement elevation, the first flange plate outside the first web end is fixedly connected with the steel reinforcement connecting plate 10; the beam bottom reinforcement is fixed on the top surface of the steel reinforcement connecting plate 10 or extends into the shaped steel concrete column from both sides of the flange plate and is welded and fixed with the top surface of the reinforcing rib plate 11 at the beam bottom reinforcement elevation; by arranging the steel reinforcement connecting plate 10 and the reinforcing rib plate 11, the connection strength of the column shaped steel 8 and the prestressed concrete beam reinforcement cage is strengthened; at the same time, the reinforcing rib plate 11 can also strengthen the connection between the first flange plate, the second flange plate 9 and the cross web.
[0036] As shown in Figure 1 , Figure 5 the prestressed pipe 2 is located below the beam top reinforcement 4, the anchor 13 is arranged after the prestressed pipe 2 passes through the cross web, the prestressed reinforcement is arranged in the prestressed pipe 2, the prestressed reinforcement is connected with the anchor 13, and after the pouring and curing of the shaped steel concrete column and the prestressed concrete beam are completed, the prestressed reinforcement is tensioned at one end through the anchor 13 to apply prestress to the prestressed concrete beam.
[0037] In the present embodiment, the DZM single-hole tensioning and anchoring system is adopted, the anchor 13 at the tensioning and anchoring end includes a clamping piece, an anchor ring, a clamping piece anchor pad, a spiral reinforcement and a hole die; it should be noted that the anchor 13 of the present application is not limited to the DZM single-hole tensioning and anchoring system, and in other embodiments, other types of anchors can also be used, such as a upsetting head anchor, a nut anchor, etc.
[0038] In the embodiment, the prestressed tendon can be tensioned at one end of the prestressed pipe 2, that is, one end of the prestressed pipe 2 is the tensioning and anchoring end, and the other end is the fixed end, and the fixed end adopts the extrusion type anchorage device. The prestressed tendon can also be tensioned at both ends of the prestressed pipe 2, that is, the prestressed tendon is first tensioned at one end, and then the prestressed tendon is tensioned at the other end, so as to reduce the friction loss.
[0039] As shown in Figures 1 to 4 , when the lateral force resisting frame is a single-span frame, the connecting joint of the prestressed concrete beam and the steel reinforced concrete column is a T-shaped joint. In the T-shaped joint, the prestressed pipe 2 is provided with an anchorage device 13 on the side of the steel reinforced concrete column away from the prestressed concrete beam. As shown in Figure 3 、 Figure 4 , after the tensioning is completed, the prestressed tendon is locked, grouting is performed from one end of the prestressed pipe 2 to block the anchoring joint 12.
[0040] As shown in Figures 5 to 8 , when the lateral force resisting frame is a multi-span frame, the connecting joint of the prestressed concrete beam and the steel reinforced concrete column is a cross-shaped joint. The difference between the cross-shaped joint and the T-shaped joint is that the cross-shaped joint is provided with a tensioning groove 15 outside the beam stirrup densification area of the adjacent span, and both ends of the prestressed pipe 2 extend into the tensioning groove 15 of the adjacent span to be anchored.
[0041] Specifically, as shown in Figure 5 、 Figure 8 , additional longitudinal reinforcement 14 is arranged on the periphery of the tensioning groove 15, which is used to strengthen the strength of the beam body on the periphery of the tensioning groove 15. In addition, in order to prevent the adjacent beam body from being damaged when the prestressed tendon is tensioned, a plurality of anti-splitting steel bars 16 are arranged near the anchorage device 13 in the beam stirrup densification area of the adjacent span.
[0042] It should be noted that the span adjacent to the current large span in the multi-span frame is a normal span.
[0043] As shown in Figure 1 、 Figure 5 , the prestressed pipe 2 is provided with a plurality of exhaust pipes 5 in the prestressed concrete beam, one end of the exhaust pipe 5 is connected with the prestressed pipe 2, and the other end extends out of the prestressed concrete beam. After the tensioning of the prestressed tendon is completed, grouting is performed into the prestressed pipe 2 from one end of the prestressed pipe 2. By arranging the exhaust pipe 5, the gas in the prestressed pipe 2 is discharged out of the prestressed pipe 2 during grouting, so as to avoid the existence of a high-pressure air column in the prestressed pipe 2 during the grouting process, which causes the grouting to be not dense and not full.
[0044] In addition, as shown in Figure 1 、 Figure 5 , other beams are vertically arranged on the steel reinforced concrete column, and the beam longitudinal reinforcement of the other beams interferes with the first flange plate. When the beam longitudinal reinforcement of the other beams interferes with the first flange plate, a steel bar connector 17 (such as a connecting sleeve) is welded on the first flange plate, and the first flange plate and the beam longitudinal reinforcement of the other beams are connected through the steel bar connector 17.
[0045] As shown in the drawings, shear studs 18 are arranged on the outer side of the first flange plate to enhance the connection between the column-shaped steel 8 and the concrete. Figures 1 to 8
[0046] In the embodiment, the strength grade of the prestressed concrete beam is not less than C40, the prestressed tendon is high-strength low-relaxation steel strand φs15.2, the structure form is (1x7) seven strands, the standard ultimate strength is fptk=1860MPa, and the cross-sectional area is 140mm2. (It should be noted that in other embodiments, other types of prestressed tendons and concrete strengths can be selected according to design requirements and prestress size).
[0047] In the embodiment, the lateral force resisting frame adopts the structure of the column-shaped steel 8 and the prestressed concrete beam, and during construction, the column-shaped steel 8 is processed in advance according to the design. When the joint connection of the column-shaped steel 8 and the prestressed concrete beam is performed, only the reinforcement cage of the prestressed concrete beam needs to be bound and positioned, the prestressed pipe 2 is laid and installed, the two ends of the prestressed pipe 2 are arranged through the column-shaped steel 8, the prestressed tendon is arranged, then the beam top tendon 4 and the beam bottom tendon 1 are welded and fixed with the reinforcing rib plate 11 and the steel reinforcement connecting plate 10 on the column-shaped steel 8. Finally, pouring is performed, and when the concrete strength reaches the standard, the prestressed tendon is tensioned, and then the prestressed pipe 2 is grouted and anchored. In this process, only a single type of steel reinforcement worker is needed to complete the joint connection and setting, which can simplify the construction process and has advantages in reducing cost and construction period and improving construction quality.
[0048] Embodiment 2 The embodiment discloses a construction method of a lateral force resisting frame composed of a column-shaped steel 8 and a prestressed concrete beam, and applies the lateral force resisting frame composed of the column-shaped steel 8 and the prestressed concrete beam disclosed in embodiment 1. The specific steps are as follows: The column-shaped steel 8 is prepared in advance, the first flange plate, the second flange plate, the shear stud, the reinforcing rib plate, the steel reinforcement connecting plate and the steel reinforcement connector are fixed on the cross web plate; The column-shaped steel 8 is installed, the column longitudinal tendon and the column hoop tendon are bound, the connecting joint with the prestressed concrete beam is reserved, the column-shaped steel 8 is supported and poured; When the strength of the column-shaped steel 8 reaches the standard, the beam bottom formwork is supported, the beam is arched at the middle segment position and the beam bottom elevation is corrected; The beam bottom tendon, the beam hoop tendon and the beam top tendon are bound, and the beam bottom tendon and the beam top tendon are connected with the column-shaped steel; The position of the prestressed pipe is positioned, the prestressed pipe is laid and installed, the prestressed tendon is arranged in the prestressed pipe, the tensioning and anchoring end and the fixed end are made; The joint end formwork and the prestressed concrete beam side formwork are supported, and the prestressed concrete beam concrete is poured; After the concrete strength of the prestressed concrete beam reaches the requirement, the joint end mold and the prestressed concrete beam side mold are removed, and the prestressed tendon is locked after being tensioned to the tensioning requirement; Then grout into the prestressed pipe, and seal the two ends of the prestressed pipe.
[0049] The embodiment can solve the problems in the prior art that the section steel and the reinforcing steel are mixedly arranged in the section steel beam, when the beam end is rigidly connected, the section steel needs to be embedded in the column, the secondary trades are alternated, and the construction of hoisting, joint connection, concrete pouring and the like is complicated; and can also solve the problems in the prior art that the material cost and the construction measure cost of the section steel concrete beam are high, and the comprehensive cost is high.
[0050] Although the specific embodiments of the present application are described above with reference to the drawings, the description is not a limitation on the scope of protection of the present application, and those skilled in the art should understand that various modifications or changes made by those skilled in the art on the basis of the technical solutions of the present application without creative labor are still within the scope of protection of the present application.
Claims
1. A lateral force resisting frame comprised of steel reinforced concrete columns and prestressed concrete beams, characterized in that, The prestressed concrete beam and the steel concrete column are integrally poured with prestressed pipes in the prestressed concrete beam, and the two ends of the prestressed pipes pass through the steel concrete column; A plurality of the prestressed pipes are symmetrically arranged along the axis of the prestressed concrete beam, the middle part of the prestressed pipe is located at the bottom of the middle section of the prestressed concrete beam, and a single prestressed pipe is symmetrically arranged relative to the axial midpoint of the prestressed concrete beam; the bottom mold of the middle section of the prestressed concrete beam is arranged in an arch shape before pouring; The steel concrete column comprises a column steel, the end of the prestressed pipe is provided with an anchor through the column steel, a prestressed tendon is arranged in the prestressed pipe, and the prestressed tendon is connected with the anchor; the column steel comprises a cross web and a first flange plate at the end of the cross web, the first flange plate is a narrow flange plate, and the prestressed pipe passes through the cross web from both sides of the first flange plate.
2. A lateral force resisting frame of steel reinforced concrete columns and prestressed concrete beams according to claim 1, wherein, The prestressed concrete beam further comprises a plurality of beam bottom tendons, a plurality of beam top tendons, a plurality of beam stirrups arranged along the beam axis, and the beam bottom tendons, the beam top tendons and the beam stirrups are bound and fixed; the steel concrete column further comprises a plurality of column longitudinal tendons uniformly distributed on the outer periphery of the column steel, a plurality of column stirrups arranged along the column axis, and the column longitudinal tendons and the column stirrups are bound and fixed.
3. A lateral force resisting frame of steel reinforced concrete columns and prestressed concrete beams as defined in claim 2, wherein, The cross web is composed of a first web and a second web fixedly connected with each other, the first web is parallel to the prestressed concrete beam, a second flange plate is fixed on the first web, and the second flange plate is located inside the first flange plate.
4. A lateral force resisting frame of steel reinforced concrete columns and prestressed concrete beams as defined in claim 3, wherein, The prestressed pipe is parallel to the first web and located below the beam top tendon, a through hole is formed in the corresponding position of the second web for the prestressed pipe to pass through the second web, and a reinforcing ring plate is attached and welded on both sides of the through hole of the second web.
5. A lateral force resisting frame of steel reinforced concrete columns and prestressed concrete beams as defined in claim 4, wherein, The column steel is provided with a reinforcing rib plate at the elevations of the beam top tendon and the beam bottom tendon, the reinforcing rib plate is fixedly connected with the first flange plate, the second flange plate and the cross web, the beam top tendon extends into the steel concrete column and is welded and fixed to the top surface of the reinforcing rib plate of the column steel.
6. A lateral force resisting frame of steel reinforced concrete columns and prestressed concrete beams as defined in claim 5, wherein, At the elevation of the beam bottom tendon, a steel tendon connecting plate is fixed outside the first flange plate at the end of the first web, the beam bottom tendon is fixed to the top surface of the steel tendon connecting plate or extends into the steel concrete column from both sides of the flange plate and is welded and fixed to the top surface of the reinforcing rib plate at the elevation of the beam bottom tendon.
7. A lateral force resisting frame of steel reinforced concrete columns and prestressed concrete beams as defined in claim 1 wherein, When the lateral force resisting frame is a single-span frame, the beam-column connection joint is a T-shaped joint, in the T-shaped joint, the prestressed pipe is provided with an anchor on the side of the steel concrete column away from the prestressed concrete beam, and after tensioning, the anchor at the tensioning sealing end is sealed to form a sealing anchor joint.
8. A lateral force resisting frame of steel reinforced concrete columns and prestressed concrete beams as defined in claim 1 wherein, When the lateral force resisting frame is a multi-span frame, the beam-column connection joint is a cross joint, a tensioning groove is reserved outside the beam stirrup densification area of the adjacent span, and the two ends of the prestressed pipe extend into the tensioning groove of the adjacent span for sealing.
9. A lateral force resisting frame of steel reinforced concrete columns and prestressed concrete beams as defined in claim 8, wherein, Additional longitudinal tendons are arranged around the tensioning groove to strengthen the strength of the beam body around the tensioning groove, and a plurality of anti-splitting tendons are arranged near the anchor in the beam stirrup densification area of the adjacent span.
10. The construction method of a lateral force resisting frame of reinforced concrete columns and prestressed concrete beams according to any one of claims 1 to 9, wherein, The specific steps are as follows: The column steel is prepared in advance, the first flange plate, the second flange plate, the reinforcing rib plate and the steel tendon connecting plate are fixed on the cross web; The column steel is installed, the column longitudinal tendons and the column stirrups are bound, the connection joint with the prestressed concrete beam is reserved, the steel concrete column is formworked and poured. When the strength of the steel reinforced concrete column reaches the standard, the bottom mold of the prestressed concrete beam is erected, the beam bottom is arched and the beam bottom elevation is corrected at the same time; the beam bottom reinforcement, beam hoop reinforcement and beam top reinforcement are tied, and the beam bottom reinforcement and beam top reinforcement are connected with the column steel; The prestressed pipe position is located, the prestressed pipe is laid and installed, and the prestressed reinforcement is arranged in the prestressed pipe; the tensioning and anchoring ends and the fixed end are made; the mold is erected, and the prestressed concrete beam is poured; When the strength of the prestressed concrete beam reaches the requirement, the mold is removed and the prestressed reinforcement is tensioned; after the tensioning requirement is reached, the prestressed reinforcement is locked, the prestressed pipe is grouted, and the two ends of the prestressed pipe are anchored.