Prestressed superposed beam of concrete filled steel tube truss

Abstract

The utility model discloses a concrete filled steel tube truss prestress superposed beam which comprises a steel tube, wavy truss web bars are welded on two sides of the lower portion of the steel tube along the length direction, a clamping connecting piece is arranged at each wave trough of each truss web bar, and each clamping connecting piece comprises a transverse rod and longitudinal rods at two ends. The two sides of the upper portion of the transverse rod are provided with clamping grooves used for being connected with the bent positions of truss web bars in a clamped mode, the portions, on the inner sides and the outer sides of the clamping grooves, of the upper portion of the transverse rod are further provided with a plurality of hoops A, and each hoop A is provided with one prestressed bar in a clamped mode. The outer sides of the two ends of the two longitudinal rods are each provided with a hoop B, and a stirrup is clamped by the pair of hoops B; two or more than two hoops C are arranged at the upper part of the cross rod, and a short rib is clamped by the hoops C; the concrete bottom plate is formed in a cubic area formed by the bottoms of the truss web bars, the clamping connecting pieces, the middle sections of the prestressed bars and the bottoms of the stirrups in a pouring mode, the time for fixing by binding steel bars on site is omitted, and production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of building materials, especially steel pipe concrete truss prestressed composite beam. BACKGROUND

[0002] In the development of domestic fabricated building, most of the existing fabricated composite beams are composed of ordinary reinforced concrete. In large-span heavy load structures, due to the low strength of steel bars, high content of steel bars, large amount of concrete, heavy weight of components, complex factory processing mold, more embedded parts, inability to realize component standardization, large component cost, complex connection structure of primary and secondary beam components and beam-column connection, and serious on-site conflict of precast beam steel bars with column steel bars, on-site installation is particularly difficult.

[0003] Application No. CN202121570255.3 proposes a steel pipe truss prestressed composite beam, which adopts factory prefabricated concrete components, and casts concrete on the prefabricated components after binding steel bars on site to form a high-strength prestressed composite beam. This structure has the advantages of high ultimate bearing capacity, large stiffness, less or no support, light component weight, on-site binding of part of non-prestressed steel bars, effective avoidance of steel bar conflict between components, simple component processing technology, facilitation of industrialized production, convenient installation and construction, simple construction technology, etc. At the same time, the truss steel pipe is used to replace the traditional stirrup, reducing on-site steel bar binding and improving construction efficiency.

[0004] However, the composite beam needs to bundle steel bars on site to fix the prestressed steel bars and the truss for pouring, which wastes time and is low in efficiency. SUMMARY

[0005] In order to reduce the on-site construction time of the prestressed composite beam and improve the production efficiency, the utility model provides a steel pipe concrete truss prestressed composite beam, which has the structure including: a steel pipe, wave-shaped truss webs are welded on both sides of the lower part of the steel pipe along the length direction, a clamping connector is arranged at each wave trough of the truss web, the clamping connector includes a horizontal rod and vertical rods at both ends, clamping grooves are arranged on both sides of the upper part of the horizontal rod for clamping the bent parts of the truss web, a plurality of clamping hoops A are arranged on the inner side and the outer side of the upper part of the horizontal rod, one clamping hoop A clamps one prestressed bar; one clamping hoop B is arranged on the outer side of each end of the two vertical rods, and one pair of clamping hoops B clamps one stirrup; two or more clamping hoops C are arranged on the upper part of the horizontal rod, and one clamping hoop C clamps one short bar; a cubic region formed by the bottom of the truss web, the clamping connector, the middle section of the prestressed bar, and the bottom of the stirrup is poured to form a concrete bottom plate.

[0006] Preferably, the two ends of the prestressed bar each have an anchoring part protruding from the concrete bottom plate.

[0007] Preferably, the clamps A, B and C each comprise a connecting rod for fixing with the horizontal or vertical rod, and the end of the connecting rod has a C-shaped elastic clamping piece.

[0008] Preferably, the clamps A, B and C are made of alloy.

[0009] Preferably, the thickness of the clamping piece is 1mm.

[0010] Preferably, the steel pipe is filled with concrete or high-strength mortar.

[0011] The utility model discloses a connecting piece is additionally arranged at each bending place of truss, and the connecting piece has a clamping groove for clamping with the web of truss, after fixing the connecting piece with the web, only needs to clamp the prestressed tendon, short tendon and hoop tendon in the corresponding clamp during the construction, and the construction of the prefabricated component steel framework can be quickly completed to carry out the subsequent pouring operation, the time for fixing the on-site bundled reinforcement is saved, and the production efficiency is improved. ACCURACY

[0012] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor according to these drawings.

[0013] Figure 1 It is the installation schematic diagram before pouring of the utility model.

[0014] Figure 2 It is the front view before pouring of the utility model.

[0015] Figure 3 It is the perspective view of the clamping connecting piece.

[0016] Figure 4 It is the schematic diagram after pouring of the utility model.

[0017] In the drawing: 1, steel pipe, 2, truss web, 3, prestressed tendon, 4, clamping connecting piece, 5, hoop tendon, 6, short tendon, 41, clamping groove, 42, clamp A, 43, clamp B, 44, vertical rod, 45, clamp D, 46, clamp C. EMBODIMENT

[0018] The various devices (parts without specific structure) selected in the application are all general standard parts or parts known by those skilled in the art, and their structure and principle can be known by the technical personnel through technical manual or through conventional experimental method.

[0019] In the description of the embodiments of the present invention, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interface, the indirect coupling or communication connection of the device or unit can be electrical, mechanical or other forms.

[0022] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0023] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. Example 1

[0024] like Figures 1-4As shown, the steel pipe concrete truss prestressed composite beam, its structure includes: steel pipe 1, the lower part both sides of steel pipe 1 are welded with the truss web 2 in length direction in the form of wave, is equipped with the clamping connecting piece 4 at every trough of truss web 2, the clamping connecting piece 4 includes a crossbar and the longitudinal rod 44 at both ends, the upper part both sides of crossbar are equipped with the clamping groove 41 for clamping with the bending of truss web 2, the upper part of crossbar is further equipped with several clamps A 42 on the inside and outside of clamping groove 41, and each clamp A 42 clamps a prestressed tendon 3;The outside of both ends of two longitudinal rods 44 is equipped with a clamp B 43, and a pair of clamp B 43 clamps a stirrup 5;The upper part of crossbar is further equipped with two or more clamps C 46, and the upper part of one end of longitudinal rod 44 is further equipped with a clamp D 45, and the clamp C 46 and the clamp C 46 clamp a short tendon 6, so that a short tendon 6 is arranged at the bending of each truss web 2;The cubic region formed by the bottom of truss web 2, the clamping connecting piece 4, the middle section of prestressed tendon 3 and the bottom of stirrup 5 is poured to form a concrete bottom plate, such as Figure 4 As shown.

[0025] More specifically, the both ends of the prestressed tendon 3 have anchoring parts protruding from the concrete bottom plate.

[0026] More specifically, the clamps A 42, the clamps B 43 and the clamps C 46 each include a connecting rod for fixing with the crossbar or the longitudinal rod 44, and the end of the connecting rod has a C-shaped elastic clamping piece, and the axial directions of the clamping pieces of the three clamps are different, so as to facilitate clamping the prestressed tendon 3, the stirrup 5 and the short tendon 6 arranged in different directions.

[0027] More specifically, the clamps A 42, the clamps B 43 and the clamps C 46 are made of aluminum alloy.

[0028] More specifically, the thickness of the clamping piece is 1 mm, and the material and thickness of the clamping piece can make it have a certain elasticity for clamping the prestressed tendon 3, the stirrup 5 and the short tendon 6 to form fixation, and the clamping groove 41 also has elasticity and can clamp the lower bending part of the truss web 2.

[0029] More specifically, the steel pipe 1 is filled with high-strength mortar.

[0030] The utility model discloses a clamping connecting piece is additionally arranged at every bending part of truss, and the connecting piece has a clamping groove for clamping with the truss web, after fixing the truss web, only needs to clamp the prestressed tendon, the short tendon and the stirrup in the corresponding clamp during on-site construction, can quickly complete the erection of the prefabricated component steel skeleton to carry out subsequent pouring operation, saves the time of on-site bundling reinforcement and fixing, and improves production efficiency.

[0031] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Steel tube concrete truss prestressed composite beam, characterized by: include: Steel pipe, wavy truss web reinforcements are welded on both sides of the lower part of the steel pipe along the length direction, and a clamping connector is installed at each trough of the truss web reinforcement, the clamping connector includes a cross bar and longitudinal bars at both ends, and grooves for clamping with the bending parts of the truss web reinforcement are provided on both sides of the upper part of the cross bar, and a number of clamps A are provided on the inner and outer sides of the grooves on the upper part of the cross bar, and each clamp A clamps a prestressed bar; a clamp B is provided on the outer sides of each end of the two longitudinal bars, and a pair of clamps B clamps a stirrup; two or more clamps C are also provided on the upper part of the cross bar, and the clamp C clamps a short bar; the cubic area formed by the bottom of the truss web reinforcement, the clamping connector, the middle section of the prestressed bar and the bottom of the stirrup is cast to form a concrete base plate.

2. The prestressed composite steel tube concrete truss beam according to claim 1, characterized in that: Both ends of the prestressed tendons are provided with anchoring portions protruding from the concrete bottom plate.

3. The prestressed composite steel tube concrete truss beam according to claim 2, characterized in that: The clamp A, clamp B and clamp C each include a connecting rod for fixing with a transverse rod or a longitudinal rod, and the end of the connecting rod is provided with a C-shaped elastic clamping piece.

4. The prestressed composite steel tube concrete truss beam according to claim 3, characterized in that: The clamp A, clamp B and clamp C are made of alloy.

5. The prestressed composite steel tube concrete truss beam according to claim 4, characterized in that: The thickness of the clamping piece is 1 mm.

6. The prestressed composite steel tube concrete truss beam according to claim 4, characterized in that: The steel pipe is filled with concrete or high-strength mortar.

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