Prefabricated steel truss concrete composite structure assembled composite beam and manufacturing method thereof

Abstract

The present invention discloses a prefabricated steel truss concrete composite structure assembled composite beam and a manufacturing method thereof, and relates to the field of building construction. A prefabricated steel truss concrete composite structure assembled composite beam comprises an assembled steel truss and an anti-cracking steel cage. The assembled steel truss comprises a steel skeleton upper crossbeam, a steel skeleton lower crossbeam I, and a steel skeleton lower crossbeam II. The ends of the steel skeleton upper crossbeam and the steel skeleton lower crossbeam I are connected as a whole by a connecting plate I. A plurality of steel skeleton support crosses and a plurality of connecting plates II are connected between the steel skeleton upper crossbeam and the steel skeleton lower crossbeam I. The assembled steel truss is installed in the anti-cracking steel cage, and the assembled steel truss and the anti-cracking steel cage are formed into an integrated structure by concrete. The present invention can reduce pollution and construction period at the construction site, reduce the impact of construction period and quality caused by outdoor climate changes, and can be recycled and reused through various construction techniques.

Description

Technical Field

[0001] The present invention relates to the field of building construction. Background Art

[0002] Over the past few decades, my country's construction industry has flourished, improving people's living environment and boosting national economic growth. However, facing rising labor costs and increasing awareness of energy conservation and environmental protection, the construction industry faces increasing international competition. To enhance core competitiveness, a new industry model—prefabricated and assembled buildings—has emerged.

[0003] Prefabricated and assembled components are the basic materials of prefabricated buildings, including all prefabricated concrete components such as beams, slabs, walls, columns, balconies, stairs, awnings, etc.

[0004] The beam is one of the most important components of a building. The existing prefabricated assembled composite beams mainly use prefabricated reinforced concrete composite beams. In the building, the composite beam steel bars are interwoven with each other, resulting in very complex nodes, which has a great impact on the floor height.

[0005] Therefore, there is an urgent need to develop an assembled composite beam that can improve the overall strength and earthquake resistance of the building. Summary of the Invention

[0006] The object of the present invention is to provide a prefabricated steel truss concrete composite structure assembled composite beam and a manufacturing method thereof.

[0007] The technical solution adopted to achieve the purpose of the present invention is as follows: a prefabricated steel truss concrete composite structure assembled composite beam, including an assembled steel truss and an anti-cracking steel cage.

[0008] The assembled steel truss comprises a steel frame upper crossbeam, a steel frame lower crossbeam I, a steel frame lower crossbeam II and a plurality of steel frame supporting crosses.

[0009] The steel frame upper crossbeam, steel frame lower crossbeam I and steel frame lower crossbeam II are parallel to each other. The steel frame lower crossbeam I is located directly below the steel frame upper crossbeam, and the lower surface of the steel frame lower crossbeam I is connected to the steel frame lower crossbeam II.

[0010] The ends of the steel frame upper cross beam, the steel frame lower cross beam I and the steel frame lower cross beam II are connected into one body through a connecting plate I.

[0011] Several steel frame support crosses are connected between the upper steel frame crossbeam and the lower steel frame crossbeam I. Two endpoints of the steel frame support crosses are on the same horizontal plane, and the other two endpoints are on another horizontal plane. The two upper endpoints of each steel frame support cross are connected to the upper steel frame crossbeam, and the two lower endpoints are connected to the lower steel frame crossbeam I. The intersections of the steel frame support crosses are reinforced by steel frame support connecting plates.

[0012] A plurality of connecting plates II are connected between the upper crossbeam of the steel frame and the lower crossbeam I of the steel frame. The two ends of the connecting plates II are respectively vertically connected to the upper crossbeam of the steel frame and the lower crossbeam I of the steel frame. The plurality of connecting plates II are arranged at equal intervals.

[0013] The assembled steel truss is arranged in the anti-cracking steel cage, and the assembled steel truss and the anti-cracking steel cage are formed into an integrated structure by pouring concrete. A concrete protective layer exists between the anti-cracking steel cage and the outer surface of the concrete.

[0014] Furthermore, the upper crossbeam of the steel frame is a channel steel with a notch facing downward, and includes a web I and two flanges I. The web I is provided with a plurality of grooves I, which are evenly spaced along the length of the web I. The grooves I are concave downward and are circular or U-shaped.

[0015] The steel frame lower crossbeam I is a channel steel with the notch facing upward. The steel frame lower crossbeam I includes a web II and two flanges II. The web II is provided with a plurality of grooves II, which are evenly spaced along the length of the web II. The grooves II are upwardly concave and are circular or U-shaped.

[0016] The steel frame lower crossbeam II is a channel steel with an upward-facing notch. It comprises a web III and two flanges III. The web III is provided with a plurality of grooves III, which are evenly spaced along the length of the web III. The grooves III are upwardly concave and are circular or U-shaped. The upper edges of the two flanges III are welded to the lower surface of the web II.

[0017] The steel skeleton support cross consists of two legs I at the upper end and two legs II at the lower end. Legs I and II are both channel steel. Leg I includes a web IV and two flanges IV. Web IV is provided with a plurality of grooves IV, which are evenly spaced along the length of web IV. The grooves IV are recessed toward the notch of the channel steel in which they are located and are circular or U-shaped. A notch is provided at the upper end of web IV, the outline of which matches the outer contour of groove I.

[0018] Leg II comprises a web V and two flanges V. Web V is provided with a plurality of grooves V, spaced evenly along the length of web V. Grooves V are recessed toward the notch of the channel steel in which they are located and are circular or U-shaped. A notch is provided at the lower end of web V, the contour of which matches the outer contour of groove II.

[0019] When the steel frame supporting cross is connected to the upper crossbeam of the steel frame, the notch at the upper end of the web IV is embedded in the outer surface of the groove I, and the outer surfaces of the two flanges IV are respectively attached to and connected to the inner surfaces of the two flanges I.

[0020] When the steel frame supporting cross is connected to the steel frame lower cross beam I, the notch at the lower end of the web V is embedded in the outer surface of the groove II, and the outer surfaces of the two flanges V are respectively attached to and connected with the inner surfaces of the two flanges II.

[0021] Furthermore, the flange IV is connected to the flange I by bolting or welding. The flange V is connected to the flange II by bolting or welding.

[0022] The upper end of the connecting plate II is bolted or welded to the outer surface of the flange I, and the lower end is bolted or welded to the outer surface of the flange II.

[0023] The upper end of the connecting plate I is connected to the outer surface of the flange I, and the lower end is connected to the outer surfaces of the flange II and the flange III, and the connection method is bolting or welding.

[0024] Furthermore, a plurality of stiffening plates are provided on both the connecting plate I and the connecting plate II.

[0025] Furthermore, a plurality of through holes penetrate two side walls of the prefabricated steel truss concrete composite structure assembled composite beam, and the plurality of through holes do not intersect with the assembled steel trusses.

[0026] Furthermore, the anti-crack steel cage has extended rebar at both the upper and lower ends, extending beyond the concrete cover. The anti-crack steel cage utilizes hot-rolled plain round steel, hot-rolled ribbed steel, or cold-rolled ribbed steel. The anti-crack steel cage is reinforced at connecting plates I and II.

[0027] Furthermore, the concrete used to cast the assembled steel trusses and the anti-cracking steel cage is high-strength concrete, ordinary concrete, foamed concrete, aerated concrete or slag concrete.

[0028] A method for manufacturing a prefabricated steel truss concrete composite structure assembled composite beam based on the above-mentioned method includes the following steps:

[0029] 1) The steel frame upper crossbeam, steel frame lower crossbeam I, steel frame lower crossbeam II and steel frame support cross are processed using steel strips.

[0030] 2) The steel frame upper cross beam, steel frame lower cross beam I, steel frame lower cross beam II, steel frame support cross, steel frame support connecting plate, connecting plate I and connecting plate II are processed into an assembled steel truss by bolting or welding.

[0031] 3) Install the anti-cracking steel cage on the periphery of the assembled steel truss.

[0032] 4) Place the anti-cracking steel cage and assembled steel truss into the truss beam steel formwork, pre-cast concrete, start the vibration table to allow the concrete to reach density, and prepare the exposed surface.

[0033] Furthermore, the anti-cracking steel cage in step 3) is formed by splicing a plurality of steel meshes, which are steel meshes tied on site or finished steel meshes.

[0034] The technical benefits of this invention are undeniable. It effectively combines steel trusses, rebar, and concrete into a unified load-bearing component, creating modular composite beams that are factory-fabricated and assembled on-site for construction. The application of this technology can reduce pollution and construction time on construction sites, shortening the time and quality impacts caused by outdoor climate fluctuations, and enabling recycling and reuse through a variety of construction techniques. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of prefabricated steel truss concrete composite structure assembled composite beam;

[0036] Figure 2 This is a schematic diagram of a prefabricated steel truss;

[0037] Figure 3 for Figure 2 Middle AA section view;

[0038] Figure 4 for Figure 2 Middle BB cross-section;

[0039] Figure 5 This is a schematic diagram of the upper crossbeam of the steel frame;

[0040] Figure 6 for Figure 5 Middle CC section view;

[0041] Figure 7 for Figure 5 Middle DD cross-sectional view.

[0042] In the figure: prefabricated steel truss 1, steel skeleton upper cross beam 101, web I 1011, groove I 10111, flange I 1012, steel skeleton lower cross beam I 102, web II 1021, groove II 10211, flange II 1022, steel skeleton lower cross beam II 103, web III 1031, groove III 10311, flange III 1032, steel skeleton support cross 104, web IV 1041, flange IV 1042, web V 1043, flange V 1044, steel skeleton support connecting plate 105, connecting plate I 106, connecting plate II 107 and through hole 4. DETAILED DESCRIPTION

[0043] The present invention will be further described below with reference to the following examples, but it should not be understood that the scope of the present invention is limited to the following examples. Without departing from the above technical ideas of the present invention, various substitutions and modifications can be made according to common technical knowledge and customary means in the art, and all should be included in the scope of protection of the present invention.

[0044] Example 1:

[0045] This embodiment discloses a prefabricated steel truss concrete composite structure assembled composite beam, including an assembled steel truss 1 and a crack-resistant steel cage.

[0046] See also Figure 2 The assembled steel truss 1 includes a steel skeleton upper crossbeam 101, a steel skeleton lower crossbeam I 102, a steel skeleton lower crossbeam II 103 and a plurality of steel skeleton support crosses 104.

[0047] The steel frame upper crossbeam 101, steel frame lower crossbeam I102 and steel frame lower crossbeam II103 are parallel to each other. The steel frame lower crossbeam I102 is located directly below the steel frame upper crossbeam 101, and the lower surface of the steel frame lower crossbeam I102 is connected to the steel frame lower crossbeam II103.

[0048] See also Figure 5 Or 6, the steel skeleton upper crossbeam 101 is a channel steel with a notch facing downward, and the steel skeleton upper crossbeam 101 includes a web I 1011 and two flanges I 1012. The web I 1011 is provided with a plurality of grooves I 10111, which are evenly spaced along the length of the web I 1011. The grooves I 10111 are downwardly concave and are circular or U-shaped.

[0049] The steel frame lower cross beam I 102 is a channel steel with the notch facing upward. The steel frame lower cross beam I 102 includes a web II 1021 and two flanges II 1022. The web II 1021 is provided with a plurality of grooves II 10211, which are evenly spaced along the length of the web II 1021. The grooves II 10211 are upwardly concave and are circular or U-shaped.

[0050] The steel frame lower cross beam II103 is a channel steel with the notch facing upwards. The steel frame lower cross beam II103 includes a web III1031 and two flanges III1032. The web III1031 is provided with a plurality of grooves III10311, which are arranged at equal intervals along the length of the web III1031. The grooves III10311 are concave upwards and are circular or U-shaped. Figure 4 , the upper edges of the two flanges III 1032 are welded to the lower surface of the web II 1021 .

[0051] The ends of the steel frame upper cross beam 101 , the steel frame lower cross beam I 102 and the steel frame lower cross beam II 103 are connected as a whole via a connecting plate I 106 .

[0052] See also Figure 2 Several steel frame support crosses 104 are connected between the upper steel frame cross beam 101 and the lower steel frame cross beam I 102. Two endpoints of each steel frame support cross 104 are on the same horizontal plane, and the other two endpoints are on another horizontal plane. The two upper endpoints of each steel frame support cross 104 are connected to the upper steel frame cross beam 101, and the two lower endpoints are connected to the lower steel frame cross beam I 102. The intersections of the steel frame support crosses 104 are reinforced by steel frame support connecting plates 105.

[0053] The steel frame supporting cross 104 includes two legs I at the upper end and two legs II at the lower end. Legs I and II are both channel steels. Leg I includes a web IV 1041 and two flanges IV 1042. The web IV 1041 is provided with a plurality of grooves IV, which are evenly spaced along the length of the web IV 1041. The grooves IV are concave toward the notch of the channel steel and are circular or U-shaped. Figure 3 A notch is provided at the upper end of the web IV 1041 , and the outline of the notch matches the outer outline of the groove I 10111 .

[0054] See also Figure 3 When the steel frame support cross 104 is connected to the steel frame upper crossbeam 101, the notch at the upper end of the web IV 1041 is embedded in the outer surface of the groove I 10111, and the outer surfaces of the two flanges IV 1042 are respectively attached to and connected with the inner surfaces of the two flanges I 1012. In this embodiment, the connection method of the flanges IV 1042 and flanges I 1012 is bolted, see Figure 7 A plurality of bolt holes are provided on flange I 1012, a bolt hole is provided on the upper end of flange IV 1042, and the upper end of flange IV 1042 is connected to flange I 1012 by bolts.

[0055] The support leg II includes a web V1043 and two flanges V1044. The web V1043 is provided with a plurality of grooves V, which are arranged at equal intervals along the length of the web V1043. The grooves V are concave toward the notch of the channel steel in which they are located, and are circular or U-shaped. Figure 4 The lower end of the web V1043 is provided with a notch, the outline of which matches the outer outline of the groove II10211.

[0056] See also Figure 4 When the steel frame support cross 104 is connected to the steel frame lower crossbeam I 102, the notch at the lower end of the web V 1043 is aligned with the outer surface of the groove II 10211, and the outer surfaces of the two flanges V 1044 are respectively aligned and connected to the inner surfaces of the two flanges II 1022. In this embodiment, the flanges V 1044 and flanges II 1022 are connected by bolting. Flange II 1022 is provided with a plurality of bolt holes, and the lower end of flange V 1044 is provided with a bolt hole. The lower end of flange V 1044 is bolted to flange II 1022.

[0057] A plurality of connecting plates II 107 are connected between the upper cross beam 101 of the steel frame and the lower cross beam I 102 of the steel frame. The two ends of the connecting plates II 107 are respectively vertically connected to the upper cross beam 101 of the steel frame and the lower cross beam I 102 of the steel frame. The plurality of connecting plates II 107 are arranged at equal intervals. The upper end of the connecting plate II 107 is bolted to the outer surface of the flange I 1012, and the lower end is bolted or welded to the outer surface of the flange II 1022. The upper and lower ends of the connecting plate II (107) are both provided with bolt holes and sleeves for bolt installation. The sleeve is provided on the plate surface of the connecting plate II (107) away from the flange I (1012). The bolt hole and the sleeve are connected. The bolt passes through the sleeve at the upper end of the connecting plate II (107), the bolt hole at the upper end of the connecting plate II (107) and the bolt hole on the flange I 1012. The bolt passes through the sleeve at the lower end of the connecting plate II (107), the bolt hole at the lower end of the connecting plate II (107) and the bolt hole on the flange II 1022. Each bolt is screwed into a nut.

[0058] The upper end of the connecting plate I 106 is connected to the outer surface of flange I 1012, and the lower end is connected to the outer surfaces of flange II 1022 and flange III 1032, and the connection method is bolted. The upper end of the connecting plate I 106 is provided with a bolt hole and a sleeve for bolt installation, and the lower end is provided with two bolt holes and two sleeves for bolt installation. The sleeves are provided on the plate surface of the connecting plate I 106 facing away from flange I (1012), and the bolt hole and sleeve are connected. Bolt holes are provided at both ends of flange III 1032. Bolts pass through the sleeve at the upper end of the connecting plate I 106, the bolt holes at the upper end of the connecting plate I 106, and the bolt holes on the flange I 1012. Bolts pass through the sleeve at the lower end of the connecting plate I 106, the bolt holes at the lower end of the connecting plate I 106, and the bolt holes on the flange II 1022. Bolts pass through the sleeve at the lower end of the connecting plate I 106, the bolt holes at the lower end of the connecting plate I 106, and the bolt holes on the flange III 1032. Each bolt is screwed into a nut. Several stiffening plates are provided on both the connecting plate I 106 and the connecting plate II 107.

[0059] The prefabricated steel truss 1 is installed in the anti-crack steel cage. Concrete is poured to form an integrated structure between the prefabricated steel truss 1 and the anti-crack steel cage. A concrete protective layer is formed between the anti-crack steel cage and the outer surface of the concrete. The concrete used to pour the prefabricated steel truss 1 and the anti-crack steel cage can be high-strength concrete, ordinary concrete, foamed concrete, aerated concrete, or slag concrete.

[0060] The anti-crack cage has extended rebar at both ends, extending beyond the concrete cover. The cage is constructed using hot-rolled plain round steel, hot-rolled ribbed steel, or cold-rolled ribbed steel. The cage is reinforced at connecting plates I 106 and II 107.

[0061] See also Figure 1 A plurality of through holes 4 pass through the two side walls of the prefabricated steel truss concrete composite structure assembled composite beam, and the plurality of through holes 4 are staggered with the steel skeleton of the assembled steel truss 1.

[0062] Example 2:

[0063] Based on the prefabricated steel truss concrete composite structure assembled composite beam described in Example 1, this embodiment discloses a method for manufacturing the composite beam, comprising the following steps:

[0064] 1) The steel frame upper cross beam 101, the steel frame lower cross beam I 102, the steel frame lower cross beam II 103 and the steel frame support cross 104 are processed using steel strips.

[0065] 2) The steel frame upper cross beam 101, steel frame lower cross beam I 102, steel frame lower cross beam II 103, steel frame support cross 104, steel frame support connecting plate 105, connecting plate I 106 and connecting plate II 107 are processed into an assembled steel truss 1 by bolting or welding.

[0066] 3) Install the anti-cracking steel cage on the periphery of the assembled steel truss 1. The anti-cracking steel cage is formed by splicing a number of steel meshes, which are steel meshes tied on site or finished steel meshes.

[0067] 4) Place the anti-cracking steel cage and assembled steel truss 1 into the truss beam steel formwork, pre-cast concrete, start the vibration table to allow the concrete to reach density, and prepare the exposed surface.

[0068] 5) The prefabricated steel truss concrete composite structure assembled composite beam formed through the above steps is steamed, demoulded, numbered, cured, and tested, and is ready for shipment.

[0069] Example 3:

[0070] This embodiment discloses a prefabricated steel truss concrete composite structure assembled composite beam, including an assembled steel truss 1 and a crack-resistant steel cage.

[0071] See also Figure 2 The assembled steel truss 1 includes a steel skeleton upper crossbeam 101, a steel skeleton lower crossbeam I 102, a steel skeleton lower crossbeam II 103 and a plurality of steel skeleton support crosses 104.

[0072] The steel frame upper crossbeam 101, steel frame lower crossbeam I102 and steel frame lower crossbeam II103 are parallel to each other. The steel frame lower crossbeam I102 is located directly below the steel frame upper crossbeam 101, and the lower surface of the steel frame lower crossbeam I102 is connected to the steel frame lower crossbeam II103.

[0073] The ends of the steel frame upper cross beam 101 , the steel frame lower cross beam I 102 and the steel frame lower cross beam II 103 are connected as a whole via a connecting plate I 106 .

[0074] See also Figure 2 Several steel frame support crosses 104 are connected between the upper steel frame cross beam 101 and the lower steel frame cross beam I 102. Two endpoints of each steel frame support cross 104 are on the same horizontal plane, and the other two endpoints are on another horizontal plane. The two upper endpoints of each steel frame support cross 104 are connected to the upper steel frame cross beam 101, and the two lower endpoints are connected to the lower steel frame cross beam I 102. The intersections of the steel frame support crosses 104 are reinforced by steel frame support connecting plates 105.

[0075] Several connecting plates II 107 are connected between the upper crossbeam 101 of the steel frame and the lower crossbeam I 102 of the steel frame. The two ends of the connecting plates II 107 are respectively vertically connected to the upper crossbeam 101 of the steel frame and the lower crossbeam I 102 of the steel frame. Several connecting plates II 107 are arranged at equal intervals.

[0076] The assembled steel truss 1 is set in the anti-cracking steel cage, and the assembled steel truss 1 and the anti-cracking steel cage are formed into an integrated structure by pouring concrete. There is a concrete protective layer between the anti-cracking steel cage and the outer surface of the concrete.

[0077] Example 4:

[0078] The main structure of this embodiment is the same as that of embodiment 3. Furthermore, the upper crossbeam 101 of the steel frame is a channel steel with the notch facing downwards. Figure 3 、 5 Or 6, the steel skeleton upper crossbeam 101 includes a web I 1011 and two flanges I 1012. The web I 1011 is provided with a plurality of grooves I 10111, which are evenly spaced along the length of the web I 1011. The grooves I 10111 are downwardly concave and are circular or U-shaped.

[0079] See also Figure 4 The steel frame lower cross beam I 102 is a channel steel with the notch facing upward. The steel frame lower cross beam I 102 includes a web II 1021 and two flanges II 1022. The web II 1021 is provided with a plurality of grooves II 10211, which are evenly spaced along the length of the web II 1021. The grooves II 10211 are upwardly concave and are circular or U-shaped.

[0080] See also Figure 4 The steel frame lower crossbeam II 103 is a channel steel with an upward-facing notch. It includes a web III 1031 and two flanges III 1032. The web III 1031 is provided with a plurality of grooves III 10311, which are evenly spaced along the length of the web III 1031. The grooves III 10311 are upwardly concave and are circular or U-shaped. The upper edges of the two flanges III 1032 are welded to the lower surface of the web II 1021.

[0081] The steel frame supporting cross 104 includes two legs I at the upper end and two legs II at the lower end. Legs I and II are both channel steels. Leg I includes a web IV 1041 and two flanges IV 1042. The web IV 1041 is provided with a plurality of grooves IV. The grooves IV are arranged at equal intervals along the length direction of the web IV 1041. Figure 3The groove IV is recessed toward the notch of the channel steel, and is a circular groove or a U-shaped groove. A notch is provided at the upper end of the web IV 1041 , the outline of which matches the outer outline of the groove I 10111 .

[0082] The support leg II includes a web V1043 and two flanges V1044. The web V1043 is provided with a plurality of grooves V, which are arranged at equal intervals along the length of the web V1043. The grooves V are concave toward the notch of the channel steel in which they are located, and are circular or U-shaped. Figure 4 The lower end of the web V1043 is provided with a notch, the outline of which matches the outer outline of the groove II10211.

[0083] See also Figure 3 When the steel frame supporting cross 104 is connected to the steel frame upper crossbeam 101, the notch at the upper end of the web IV 1041 is inlaid with the outer surface of the groove I 10111, and the outer surfaces of the two flanges IV 1042 are respectively attached and connected to the inner surfaces of the two flanges I 1012.

[0084] See also Figure 4 When the steel frame supporting cross 104 is connected to the steel frame lower cross beam Ⅰ102, the notch at the lower end of the web Ⅴ1043 is embedded in the outer surface of the groove Ⅱ10211, and the outer surfaces of the two flanges Ⅴ1044 are respectively attached and connected to the inner surfaces of the two flanges Ⅱ1022.

[0085] Example 5:

[0086] The main structure of this embodiment is the same as that of embodiment 4. Furthermore, the flange IV 1042 is connected to the flange I 1012 by welding. The flange V 1044 is connected to the flange II 1022 by welding.

[0087] The upper end of the connecting plate II 107 is welded to the outer surface of the flange I 1012 , and the lower end is welded to the outer surface of the flange II 1022 .

[0088] The upper end of the connecting plate I 106 is connected to the outer surface of the flange I 1012 , and the lower end is connected to the outer surfaces of the flange II 1022 and the flange III 1032 , and the connection method is welding.

[0089] Example 6:

[0090] The main structure of this embodiment is the same as that of embodiment 5. Furthermore, a plurality of stiffening plates are provided on both the connecting plate I 106 and the connecting plate II 107 .

[0091] Example 7:

[0092] The main structure of this embodiment is the same as that of embodiment 6. Figure 1The prefabricated steel truss concrete composite structure assembled composite beam includes a plurality of through holes 4, which penetrate the two side walls of the prefabricated steel truss concrete composite structure assembled composite beam, and the plurality of through holes 4 do not intersect with the assembled steel truss 1.

[0093] Example 8:

[0094] This embodiment shares the same primary structure as Example 7. Furthermore, the anti-crack cage features extended rebar at both the upper and lower ends, extending beyond the concrete cover. The anti-crack cage utilizes hot-rolled plain round steel, hot-rolled ribbed steel, or cold-rolled ribbed steel. The cage is reinforced at connecting plates I 106 and II 107.

[0095] Example 9:

[0096] The main structure of this embodiment is the same as that of embodiment 8. Furthermore, the concrete used to cast the assembled steel truss 1 and the anti-cracking steel mesh 3 is ordinary concrete.

Claims

1. A prefabricated steel truss concrete composite structure assembled composite beam, characterized by: It includes an assembled steel truss (1) and a crack-resistant steel cage; The assembled steel truss (1) comprises a steel frame upper crossbeam (101), a steel frame lower crossbeam I (102), a steel frame lower crossbeam II (103) and a plurality of steel frame support crosses (104); The steel frame upper crossbeam (101), the steel frame lower crossbeam I (102), and the steel frame lower crossbeam II (103) are parallel to each other, the steel frame lower crossbeam I (102) is located directly below the steel frame upper crossbeam (101), and the lower surface of the steel frame lower crossbeam I (102) is connected to the steel frame lower crossbeam II (103); The ends of the steel frame upper crossbeam (101), the steel frame lower crossbeam I (102), and the steel frame lower crossbeam II (103) are connected as one body via a connecting plate I (106); A plurality of steel frame support crosses (104) are connected between the steel frame upper cross beam (101) and the steel frame lower cross beam I (102), wherein two end points of the steel frame support crosses (104) are on the same horizontal plane, and the other two end points are on another horizontal plane; the two end points of the upper end of each of the steel frame support crosses (104) are connected to the steel frame upper cross beam (101), and the two end points of the lower end are connected to the steel frame lower cross beam I (102), and the intersection of the steel frame support crosses (104) is reinforced by a steel frame support connecting plate (105); A plurality of connecting plates II (107) are connected between the upper cross beam (101) of the steel frame and the lower cross beam I (102) of the steel frame. The two ends of the connecting plates II (107) are respectively vertically connected to the upper cross beam (101) of the steel frame and the lower cross beam I (102) of the steel frame. The plurality of connecting plates II (107) are arranged at equal intervals. The assembled steel truss (1) is arranged in the anti-cracking steel cage, and the assembled steel truss (1) and the anti-cracking steel cage are formed into an integrated structure by pouring concrete, and a concrete protective layer exists between the anti-cracking steel cage and the outer surface of the concrete; The upper cross beam (101) of the steel frame is a channel steel with a notch facing downwards. The upper cross beam (101) of the steel frame includes a web I (1011) and two flanges I (1012). The web I (1011) is provided with a plurality of grooves I (10111). The plurality of grooves I (10111) are arranged at equal intervals along the length direction of the web I (1011). The grooves I (10111) are concave downwards and are circular grooves or U-shaped grooves. The steel frame lower cross beam I (102) is a channel steel with a notch facing upwards. The steel frame lower cross beam I (102) includes a web II (1021) and two flanges II (1022). The web II (1021) is provided with a plurality of grooves II (10211). The plurality of grooves II (10211) are arranged at equal intervals along the length direction of the web II (1021). The grooves II (10211) are concave upwards and are circular grooves or U-shaped grooves. The steel frame lower cross beam II (103) is a channel steel with a notch facing upwards. The steel frame lower cross beam II (103) includes a web III (1031) and two flanges III (1032). The web III (1031) is provided with a plurality of grooves III (10311). The plurality of grooves III (10311) are arranged at equal intervals along the length direction of the web III (1031). The grooves III (10311) are concave upwards and are circular grooves or U-shaped grooves. The upper edges of the two flanges III (1032) are welded to the lower surface of the web II (1021). The steel skeleton supporting cross (104) includes two legs I at the upper end and two legs II at the lower end, both legs I and II are channel steels, leg I includes a web IV (1041) and two flanges IV (1042), a plurality of grooves IV are provided on the web IV (1041), and the plurality of grooves IV are arranged at equal intervals along the length direction of the web IV (1041); the grooves IV are recessed in the direction of the notch of the channel steel, and are circular grooves or U-shaped grooves; a notch is provided at the upper end of the web IV (1041), and the outline of the notch matches the outer outline of the groove I (10111); The support leg II includes a web V (1043) and two flanges V (1044). The web V (1043) is provided with a plurality of grooves V, which are arranged at equal intervals along the length direction of the web V (1043). The grooves V are recessed toward the notch of the channel steel in which they are located, and are circular grooves or U-shaped grooves. A notch is provided at the lower end of the web V (1043), and the contour of the notch matches the outer contour of the groove II (10211). When the steel frame supporting cross (104) is connected to the steel frame upper crossbeam (101), the notch at the upper end of the web IV (1041) is embedded in the outer surface of the groove I (10111), and the outer surfaces of the two flanges IV (1042) are respectively attached to and connected with the inner surfaces of the two flanges I (1012); When the steel frame supporting cross (104) is connected to the steel frame lower cross beam I (102), the notch at the lower end of the web V (1043) is embedded in the outer surface of the groove II (10211), and the outer surfaces of the two flanges V (1044) are respectively attached to and connected to the inner surfaces of the two flanges II (1022).

2. The prefabricated steel truss concrete composite structure assembled composite beam according to claim 1, characterized in that: The connection method between flange IV (1042) and flange I (1012) is bolted or welded; the connection method between flange V (1044) and flange II (1022) is bolted or welded; The upper end of the connecting plate II (107) is bolted or welded to the outer surface of the flange I (1012), and the lower end is bolted or welded to the outer surface of the flange II (1022); The upper end of the connecting plate I (106) is connected to the outer surface of the flange I (1012), and the lower end is connected to the outer surfaces of the flange II (1022) and the flange III (1032), and the connection method is bolting or welding.

3. The prefabricated steel truss concrete composite structure assembled composite beam according to claim 1, characterized in that: A plurality of stiffening plates are provided on both the connecting plate I (106) and the connecting plate II (107).

4. The prefabricated steel truss concrete composite structure assembled composite beam according to claim 1, characterized in that: It comprises a plurality of through holes (4), wherein the plurality of through holes (4) penetrates two side walls of the prefabricated steel truss concrete composite structure assembled composite beam, and the plurality of through holes (4) do not intersect with the assembled steel truss (1).

5. The prefabricated steel truss concrete composite structure assembled composite beam according to claim 1, characterized in that: The upper and lower ends of the anti-cracking steel cage are both reserved with extended steel bars, which extend out of the concrete protective layer; the anti-cracking steel cage adopts hot-rolled round steel bars, hot-rolled ribbed steel bars or cold-rolled ribbed steel bars; the anti-cracking steel cage is densified at the connection plate I (106) and the connection plate II (107).

6. The prefabricated steel truss concrete composite structure assembled composite beam according to claim 1, characterized in that: The concrete used to cast the assembled steel truss (1) and the anti-cracking steel cage is high-strength concrete, ordinary concrete, foamed concrete, aerated concrete or slag concrete.

7. A method for manufacturing a prefabricated steel truss concrete composite structure assembled composite beam according to claim 1, characterized in that: The following steps are involved: 1) using steel strips to process the steel frame upper cross beam (101), steel frame lower cross beam I (102), steel frame lower cross beam II (103) and steel frame support cross (104); 2) processing the steel frame upper cross beam (101), steel frame lower cross beam I (102), steel frame lower cross beam II (103), steel frame support cross (104), steel frame support connecting plate (105), connecting plate I (106) and connecting plate II (107) into an assembled steel truss (1) by bolting or welding; 3) installing the anti-cracking steel cage on the periphery of the assembled steel truss (1); 4) placing the anti-cracking steel cage and the assembled steel truss (1) into a truss beam steel mold box, precasting and pouring concrete, starting a vibration table to allow the concrete to reach density, and preparing the exposed surface.

8. The method for manufacturing a prefabricated steel truss concrete composite structure assembled composite beam according to claim 7, characterized in that: The anti-cracking steel cage in step 3) is formed by splicing a plurality of steel meshes, which are steel meshes tied on site or finished steel meshes.

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