Anti-corrosion durable assembly type profile steel-UHPC (Ultra High Performance Concrete) externally-wrapped roof composite beam

Abstract

The utility model relates to the technical field of composite beams, and discloses an anti-corrosion durable assembly type profile steel-UHPC outer wrapping roof composite beam which comprises a base, an installation mechanism is fixedly arranged on the top face of the base, and an auxiliary mechanism is fixedly arranged on the side face of the installation mechanism. The mounting mechanism comprises a mounting part and a connecting part; the side surface of the mounting part is fixedly connected with the side surface of the connecting part; the mounting part comprises a lower box-shaped column, and the bottom surface of the lower box-shaped column is in sealing contact with the top surface of the base. By adopting an ultra-high performance concrete material and a special formula, the assembly type profile steel-UHPC externally-wrapped roof combination achieves the effects of high durability and high corrosion resistance, the problem of a complex process of a conventional prestressed concrete beam is solved, the overall cost is saved through the excellent performance of UHPC ultra-high performance concrete, steel bar materials are reduced, the construction process is optimized, the innovative structure is achieved, and the assembly type profile steel-UHPC externally-wrapped roof combination is suitable for large-scale popularization and application. And the profile steel-UHPC externally-wrapped roof composite beam structure can be widely applied to water conservancy building structures.

Description

Technical Field

[0001] The utility model relates to the technical field of composite beams, in particular to an anti-corrosion and durable assembled steel-UHPC exterior roof composite beam. Background Art

[0002] With the rapid development of social economy, steel structure buildings have become one of the main types of modern building structures. They are mainly composed of steel beams, steel columns, steel trusses and other components made of steel sections and steel plates.

[0003] The common roof well grid beams in water conservancy projects are mostly cast-in-place concrete structures, steel structures and prestressed concrete structures. For large-scale water conservancy projects, since the working well needs to cross a variety of complex terrains, the cast-in-place concrete structure project is large in scale, with high technical difficulty and great construction difficulty. It requires a large amount of support and formwork engineering, high construction risk, slow construction speed, long construction period, and is prone to cracking. Although steel structures are easy to construct, fast in construction speed, short in construction period, and good in seismic performance, they have poor corrosion resistance and fire resistance, and require special fire prevention treatment. Wind resistance needs to be combined with other measures, and the operation and maintenance workload is large, and the construction cost is high. Prestressed concrete structures have high rigidity and less maintenance during operation.

[0004] In order to meet the bearing capacity requirements, reinforced concrete beams need larger structural dimensions and a large number of prestressed steel bars, ordinary steel bars and stirrups, which is not convenient for concrete pouring. If the prestressing is not well controlled, it is easy to crack and affect the durability of the structure. Therefore, an anti-corrosion and durable assembled steel-UHPC outer roof composite beam is designed. Utility Model Content

[0005] The utility model aims to provide a corrosion-resistant and durable assembled steel-UHPC exterior roof composite beam to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-corrosion and durable assembled steel-UHPC outer roof composite beam comprises a base, a mounting mechanism is fixedly arranged on the top surface of the base, and an auxiliary mechanism is fixedly arranged on the side of the mounting mechanism;

[0007] The mounting mechanism comprises a mounting portion and a connecting portion, and a side surface of the mounting portion is fixedly connected to a side surface of the connecting portion;

[0008] The mounting portion comprises a lower box-shaped column, the bottom surface of the lower box-shaped column being in sealing contact with the top surface of the base;

[0009] The auxiliary mechanism comprises an anti-rust portion and a fixing portion, wherein the bottom surface of the anti-rust portion and the top surface of the fixing portion are fixedly connected;

[0010] The fixing part comprises a base fixing rod, and the bottom surfaces of the four ends of the base are respectively fixedly connected to the top surfaces of the four base fixing rods.

[0011] Preferably, two fixing brackets are fixedly provided on the left and right end surfaces of the lower box-type column respectively, the bottom surfaces of the two fixing brackets are in sealing contact with the top surface of the base respectively, and two anti-rust bolts are provided on the top surfaces of the front and rear ends of the fixing brackets respectively.

[0012] Preferably, the bottom end surfaces of the two anti-rust bolts respectively penetrate the fixing frame and the top surface of the base in sequence and extend to the inside of the base, and the surfaces of the anti-rust bolts are respectively threadedly connected to the fixing frame and the inner wall of the base.

[0013] Preferably, the top surface of the lower box-type column is sealed with a middle flange of a node connection plug-in, the inner wall of the middle flange of the node connection plug-in is fixedly provided with a node connection short column, and the top surface of the node connection short column is sleeved with an upper box-type column.

[0014] Preferably, the bottom surface of the upper box-type column is in sealing contact with the top surface of the flange in the middle of the node connection plug-in, the top inner wall of the upper box-type column is provided with a top steel beam, and the inner wall fixing sleeve at the bottom end of the top steel beam is provided with a sealing sleeve.

[0015] Preferably, the bottom surface of the sealing sleeve is in sealing contact with the top surface of the upper box column, the fixed sleeve on the left end surface of the top steel beam is provided with a top connecting short column, and the front surface of the top steel beam and the surface of the lower box column are both provided with H-beam end face vertical steel plates.

[0016] Preferably, an H-shaped steel beam is sealed inside the bottom surface of the vertical steel plate at the end of the H-shaped beam, and fixing bolts are provided on the top steel beam, the lower box column, the vertical steel plate at the end of the H-shaped beam, and the inside of the H-shaped steel beam.

[0017] Preferably, the top steel beam, the lower box column, the vertical steel plate at the end of the H-beam, and the surface of the H-beam are all threadedly connected by a plurality of fixing bolts, and threaded holes are fixedly opened on the surfaces of the top steel beam, the lower box column, and the upper box column.

[0018] Preferably, a drying barrel is fixedly provided on the top surface of the base, a vent hole is fixedly provided on the surface of the drying barrel, a mounting groove is fixedly provided on the bottom surface of the base, and a moisture-proof pad is fixedly provided on the inner wall of the mounting groove of the base.

[0019] Preferably, connecting rods are fixedly provided on the front, rear, left and right end faces of the upper box-type column, and protective steel bars are fixedly provided on the outer sides of the four connecting rods.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. The corrosion-resistant and durable assembled steel-UHPC external roof composite beam adopts ultra-high performance concrete materials and special formulas to make the assembled steel-UHPC external roof combination have strong durability and corrosion resistance, solve the complex process of conventional prestressed concrete beams, and use the superior performance of UHPC ultra-high performance concrete to reduce steel materials, optimize construction technology, save overall costs, and have an innovative structure, making the steel-UHPC external roof composite beam structure more widely used in water conservancy building structures;

[0022] 2. The corrosion-resistant and durable assembled steel-UHPC outer roof composite beam is provided with an installation mechanism, and the anti-rust bolts and the fixing frame cooperate to ensure that the bottom of the entire steel can be stable during installation, and the anti-rust bolts will not rust and affect stability during long-term use.

[0023] 3. The corrosion-resistant and durable assembled steel-UHPC external roof composite beam is provided with an auxiliary mechanism, and the drying barrel and the moisture-proof pad are provided to cooperate with each other, so that when the steel is installed and fixed for a long time, the bottom of the steel can be protected from moisture by the moisture-proof pad, which will not cause the steel to be affected by moisture and affect its stability in the later period. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional schematic diagram of the front structure of the utility model;

[0025] Figure 2 It is a three-dimensional cross-sectional schematic diagram of the front structure of the utility model;

[0026] Figure 3 It is a three-dimensional schematic diagram of the back structure of the utility model;

[0027] Figure 4 For this utility model Figure 1 A three-dimensional enlarged schematic diagram of the structure of the middle A area;

[0028] Figure 5 For this utility model Figure 1 A three-dimensional enlarged schematic diagram of the structure of area B in the middle.

[0029] In the figure: 1. base; 2. installation mechanism; 201. node connection short column; 202. middle flange of node connection plug-in; 203. lower box column; 204. upper box column; 205. top steel beam; 206. sealing sleeve; 207. top connection short column; 208. vertical steel plate on the end face of H-beam; 209. H-beam; 210. fixing bolt; 211. fixing frame; 212. anti-rust bolt; 3. auxiliary mechanism; 301. moisture-proof pad; 302. base fixing rod; 303. drying barrel; 304. connecting rod; 305. protective steel bar. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Embodiment 1

[0032] See also Figure 1-Figure 5 As shown, a corrosion-resistant and durable assembled steel-UHPC external roof composite beam includes a base 1, a mounting mechanism 2 is fixedly arranged on the top surface of the base 1, and an auxiliary mechanism 3 is fixedly arranged on the side of the mounting mechanism 2; the mounting mechanism 2 includes a mounting portion and a connecting portion, and the side of the mounting portion is fixedly connected to the side of the connecting portion; the mounting portion includes a lower box column 203, and the bottom surface of the lower box column 203 is in sealing contact with the top surface of the base 1; the auxiliary mechanism 3 includes an anti-rust portion and a fixing portion, and the bottom surface of the anti-rust portion is fixedly connected to the top surface of the fixing portion; the fixing portion includes a base fixing rod 302, and the bottom surfaces of the four ends of the base 1 are respectively fixedly connected to the top surfaces of the four base fixing rods 302;

[0033] During work, before cutting the steel bars, first check the length, quantity and model of the steel bars of various specifications in the construction drawings. According to the length of the original steel bars and the design length in the drawings and in combination with the specifications, match the steel bars, determine the cutting length of the steel bars, and fit the two fixing frames 211 of the lower box column 203 into the threaded holes at the left and right ends of the base 1.

[0034] Furthermore, two fixing brackets 211 are fixedly arranged on the left and right end surfaces of the lower box-shaped column 203, and the bottom surfaces of the two fixing brackets 211 are respectively in sealing contact with the top surface of the base 1, and two anti-rust bolts 212 are respectively arranged on the top surfaces of the front and rear ends of the fixing brackets 211, and the heads of the anti-rust bolts 212 are made of anti-rust material;

[0035] During operation, the cutting length of the steel bars is determined, the two fixing frames 211 of the lower box-type column 203 are fitted into the threaded holes at the left and right ends of the base 1, and the corresponding anti-rust bolts 212 are screwed in accordingly.

[0036] Furthermore, the bottom end surfaces of the two anti-rust bolts 212 respectively penetrate the fixing frame 211 and the top surface of the base 1 and extend to the inside of the base 1, and the surfaces of the anti-rust bolts 212 are respectively threadedly connected with the fixing frame 211 and the inner wall of the base 1;

[0037] During operation, the corresponding anti-rust bolts 212 are screwed in to fix the lower box column 203 and the base 1, and the four base fixing rods 302 are inserted into the installation position.

[0038] Furthermore, the top surface of the lower box-type column 203 is sealed with a node connection plug-in middle flange 202, the inner wall of the node connection plug-in middle flange 202 is fixedly provided with a node connection short column 201, and the top surface of the node connection short column 201 is sleeved with an upper box-type column 204;

[0039] During operation, the node connection short column 201 is inserted into the top of the lower box column 203, and the upper box column 204 is sleeved over the node connection short column 201, and the corresponding fixing bolts 210 are inserted into the threaded holes to fix them.

[0040] Furthermore, the bottom surface of the upper box column 204 is in sealing contact with the top surface of the middle flange 202 of the node connection plug-in, the top inner wall of the upper box column 204 is provided with a top steel beam 205, and the inner wall fixed sleeve of the bottom end of the top steel beam 205 is provided with a sealing sleeve 206, and the sealing sleeve 206 can increase the sealing performance of the contact between the top steel beam 205 and the upper box column 204;

[0041] During operation, the top steel beam 205 is inserted into the upper box column 204 and fixed with the corresponding fixing bolts 210 in the same way.

[0042] Furthermore, the bottom surface of the sealing sleeve 206 is in sealing contact with the top surface of the upper box column 204, the left end surface of the top steel beam 205 is fixedly sleeved with a top connecting short column 207, and the front surface of the top steel beam 205 and the surface of the lower box column 203 are both provided with an H-beam end face vertical steel plate 208;

[0043] During operation, the vertical steel plate at the end of the H-beam is correspondingly attached to the surface of the lower box column 203, and the H-beam 209 is placed on the surface of the vertical steel plate at the end of the H-beam.

[0044] Furthermore, an H-shaped steel beam 209 is sealed inside the bottom surface of the vertical steel plate 208 at the end of the H-shaped beam, and fixing bolts 210 are arranged inside the top steel beam 205, the lower box column 203, the vertical steel plate 208 at the end of the H-shaped beam, and the H-shaped steel beam 209;

[0045] During operation, the vertical steel plate at the end of the H-beam is correspondingly attached to the surface of the lower box column 203 , and the H-beam 209 is placed on the surface of the vertical steel plate at the end of the H-beam, and fixed accordingly by fixing bolts 210 .

[0046] Furthermore, the top steel beam 205, the lower box column 203, the H-beam end vertical steel plate 208, and the surface of the H-beam 209 are all threadedly connected by a plurality of fixing bolts 210, and the top steel beam 205, the lower box column 203, and the upper box column 204 are all fixedly provided with threaded holes on their surfaces;

[0047] During operation, the top steel beam 205 is inserted into the upper box column 204 and fixed with the corresponding fixing bolts 210 in the same way. By providing a top connecting short column 207 on the surface of the top steel beam 205, multiple top steel beams 205 can be assembled.

[0048] Furthermore, a drying barrel 303 is fixedly provided on the top surface of the base 1, a desiccant is placed inside the drying barrel 303, a vent hole is fixedly provided on the surface of the drying barrel 303, a mounting groove is fixedly provided on the bottom surface of the base 1, and a moisture-proof pad 301 is fixedly provided on the inner wall of the mounting groove of the base 1;

[0049] During operation, the desiccant in the drying barrel 303 and the moisture-proof pad 301 can effectively protect the rust-proof effect of the steel installation.

[0050] Furthermore, the front, rear, left and right end surfaces of the upper box-shaped column 204 are all fixedly provided with connecting rods 304, and the outer side surfaces of the four connecting rods 304 are fixedly provided with protective steel bars 305;

[0051] When working, the steel bars are matched according to the length of the original steel bar, the design length on the drawing and the specifications, and the cutting length of the steel bars is determined.

[0052] Working principle: When in use, before cutting the steel bars, first check the length, quantity and model of the steel bars of various specifications in the construction drawings. According to the length of the original steel bars and the design length of the drawings and in combination with the specifications, match the steel bars and determine the cutting length of the steel bars. Fit the two fixing frames 211 of the lower box column 203 with the threaded holes on the left and right ends of the base 1, and screw in the corresponding anti-rust bolts 212 to fix the lower box column 203 and the base 1. Insert the four base fixing rods 302 into the installation position to fix the base 1, insert the node connection short column 201 into the top of the lower box column 203, and put the upper box column 204 on the top of the node connection short column 201, insert the corresponding fixing bolts 210 into the threaded holes to fix it, fit the vertical steel plate of the end face of the H-beam to the surface of the lower box column 203, and place the H-beam 209 It is placed on the surface of the vertical steel plate at the end face of the H-beam and fixed accordingly by fixing bolts 210. The top steel beam 205 is inserted into the upper box column 204 and fixed by the corresponding fixing bolts 210 in the same way. The top connecting short column 207 is provided on the surface of the top steel beam 205 to complete the assembly of multiple top steel beams 205. The desiccant in the drying barrel 303 and the moisture-proof pad 301 can effectively protect the anti-rust effect of the steel installation. The production of UHPC adopts professional factories to produce premixes, and the mixing equipment adopts a high-speed mixer dedicated to UHPC. When mixing UHPC, dry mixing is first performed to make the premix in a flowing state; then water is added in proportion to perform wet mixing. The surface of the formwork is moistened by mist spraying 10 to 15 minutes before pouring. The concrete is distributed in a mobile layered manner from one end to the other. When the concrete is poured to the bottom chamfer, turn on the lower attached vibration motor for 3-5 minutes, and then continue pouring to the top. After pouring, use mist spray + manual plastering to finish the beam surface, and cover it with a moisturizing film in time to prevent surface cracks due to surface water loss.

[0053] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant and durable assembled steel-UHPC exterior roof composite beam, comprising a base (1), characterized in that: A mounting mechanism (2) is fixedly arranged on the top surface of the base (1), and an auxiliary mechanism (3) is fixedly arranged on the side surface of the mounting mechanism (2); The mounting mechanism (2) comprises a mounting portion and a connecting portion, and a side surface of the mounting portion and a side surface of the connecting portion are fixedly connected; The mounting portion comprises a lower box-shaped column (203), the bottom surface of the lower box-shaped column (203) being in sealing contact with the top surface of the base (1); The auxiliary mechanism (3) comprises an anti-rust portion and a fixing portion, wherein the bottom surface of the anti-rust portion and the top surface of the fixing portion are fixedly connected; The fixing part comprises a base fixing rod (302), and the bottom surfaces of the four ends of the base (1) are respectively fixedly connected to the top surfaces of four base fixing rods (302).

2. The corrosion-resistant and durable assembled steel-UHPC exterior roof composite beam according to claim 1 is characterized by: Two fixing frames (211) are fixedly disposed on the left and right end surfaces of the lower box-shaped column (203), respectively; the bottom surfaces of the two fixing frames (211) are in sealing contact with the top surface of the base (1), respectively; and two rust-proof bolts (212) are disposed on the top surfaces of the front and rear ends of the fixing frames (211), respectively.

3. The corrosion-resistant and durable assembled steel-UHPC exterior roof composite beam according to claim 2 is characterized by: The bottom end surfaces of the two anti-rust bolts (212) respectively penetrate the fixing frame (211) and the top surface of the base (1) in sequence and extend into the interior of the base (1); the surfaces of the anti-rust bolts (212) are respectively threadedly connected to the fixing frame (211) and the inner wall of the base (1).

4. The corrosion-resistant and durable assembled steel-UHPC exterior roof composite beam according to claim 1 is characterized by: The top surface of the lower box-shaped column (203) is sealed with a node connection plug-in middle flange (202), the inner wall of the node connection plug-in middle flange (202) is fixedly provided with a node connection short column (201), and the top surface of the node connection short column (201) is sleeved with an upper box-shaped column (204).

5. The corrosion-resistant and durable assembled steel-UHPC exterior roof composite beam according to claim 4 is characterized by: The bottom surface of the upper box-type column (204) is in sealing contact with the top surface of the middle flange (202) of the node connection plug-in, the top inner wall of the upper box-type column (204) is provided with a top steel beam (205), and the bottom inner wall fixed sleeve of the top steel beam (205) is provided with a sealing sleeve (206).

6. The corrosion-resistant and durable assembled steel-UHPC exterior roof composite beam according to claim 5 is characterized by: The bottom surface of the sealing sleeve (206) is in sealing contact with the top surface of the upper box-type column (204); the fixed sleeve on the left end surface of the top steel beam (205) is provided with a top connecting short column (207); the front surface of the top steel beam (205) and the surface of the lower box-type column (203) are both provided with H-beam end face vertical steel plates (208).

7. The corrosion-resistant and durable assembled steel-UHPC exterior roof composite beam according to claim 6 is characterized by: The H-shaped beam end surface vertical steel plate (208) is sealed with an H-shaped steel beam (209) at the bottom surface, and the top steel beam (205), the lower box column (203), the H-shaped beam end surface vertical steel plate (208), and the H-shaped steel beam (209) are all provided with fixing bolts (210) therein.

8. The corrosion-resistant and durable assembled steel-UHPC exterior roof composite beam according to claim 7 is characterized by: The top steel beam (205), the lower box column (203), the H-beam end vertical steel plate (208), and the surface of the H-beam (209) are all threadedly connected via a plurality of fixing bolts (210), and the top steel beam (205), the lower box column (203), and the upper box column (204) are all fixedly provided with threaded holes on their surfaces.

9. The corrosion-resistant and durable assembled steel-UHPC exterior roof composite beam according to claim 1, characterized in that: A drying barrel (303) is fixedly arranged on the top surface of the base (1), a vent hole is fixedly sleeved on the surface of the drying barrel (303), a mounting groove is fixedly opened on the bottom surface of the base (1), and a moisture-proof pad (301) is fixedly arranged on the inner wall of the mounting groove of the base (1).

10. The corrosion-resistant and durable assembled steel-UHPC exterior roof composite beam according to claim 4, characterized in that: Connecting rods (304) are fixedly provided on the front, rear, left and right end surfaces of the upper box-shaped column (204), and protective steel bars (305) are fixedly provided on the outer side surfaces of the four connecting rods (304).

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