I-shaped thin web girder lossless reinforcing structure

Abstract

The utility model discloses a lossless reinforcing structure for an I-shaped thin web girder, which comprises a steel plate frame sleeved outside a lower flange and a web plate of the I-shaped thin web girder, and an opening for accommodating the web plate is formed in the middle of the upper surface of the steel plate frame; the inorganic grouting material is filled between the steel plate frame and the I-shaped thin web girder; the whole clamping plate is U-shaped and is fixedly sleeved outside the steel plate frame; tightening latch parts of the first studs are fixedly arranged on the inner surface of the steel plate frame; the vertical connecting plate is used for fixedly connecting the free end, corresponding to the opening, of the steel plate frame and the heads of the first studs; tightening latch parts of the second studs are fixedly arranged on the inner surface of the steel plate frame. The lossless reinforcing structure composed of the steel plate frame, the vertical connecting plate, the clamping plate, the first studs, the second studs and the inorganic grouting materials is tightly connected with the web and the lower flange of the I-shaped thin web girder in a clamped mode, and the structural strength of the I-shaped thin web girder is improved.

Description

Technical Field

[0001] The utility model relates to the field of building structure reinforcement, in particular to an I-shaped thin-web beam lossless reinforcement structure. Background Art

[0002] The I-shaped thin-web beam is a prefabricated reinforced concrete component with the characteristics of light weight and high bearing capacity. It is suitable for large-span floor structures and has been widely used in industrial plant roofs, cultural and sports venues and other industrial or public building roofs. With the passage of time, these industrial plants and cultural and sports venues have gradually been damaged or even become dangerous buildings. Through reinforcement and renovation, they can continue to play their own value.

[0003] At present, most traditional reinforced concrete frame reinforcements use methods such as increasing the cross-section or enclosing steel. This reinforcement process often involves destructive construction such as embedding reinforcements, drilling holes, and breaking part of the original cross-section. Since the thin-web beam itself has a slender size and relatively simple reinforcement, the structure itself has low safety redundancy. Therefore, in the case of destructive reinforcement construction, it is easy to produce safety risks of structural collapse. In addition, traditional reinforcement methods require the use of organic adhesives such as embedding glue, which cannot withstand high temperatures, resulting in the reinforced components being unable to meet the building fire protection requirements.

[0004] Therefore, it is urgent to propose a new solution to solve the above problems. Summary of the invention

[0005] The utility model provides an I-shaped thin-web beam non-destructive reinforcement structure, which can solve the problems in the prior art of easily generating safety risks of structural collapse and failing to meet building fire protection requirements in the case of destructive reinforcement construction.

[0006] The utility model provides an I-shaped thin web beam non-destructive reinforcement structure, comprising:

[0007] The steel plate frame is mounted on the lower flange and the web of the I-shaped thin web beam, and an opening is opened in the middle of the upper surface to accommodate the web;

[0008] Inorganic grouting material is filled between the steel plate frame and the I-shaped thin-web beam to connect the steel plate frame and the I-shaped thin-web beam into a whole;

[0009] A plurality of clamping plates are arranged at intervals along the length direction of the I-shaped thin-web beam, and a single clamping plate is U-shaped as a whole and is fixedly sleeved outside the steel plate frame;

[0010] A plurality of first bolts are arranged horizontally, wherein a bolt rod portion of a single first bolt is fixedly arranged on an inner surface of the steel plate frame;

[0011] A vertical connecting plate, used for fixedly connecting the free end of the steel plate frame corresponding to the opening and the heads of the plurality of the first bolts;

[0012] A plurality of second bolts are arranged in parallel below the first bolt, and a bolt rod portion of a single second bolt is fixedly arranged on the inner surface of the steel plate frame.

[0013] Furthermore, the steel plate frame includes a bottom steel plate, a side steel plate and a top steel plate which are fixedly connected in sequence, the bottom steel plate and the side steel plates are respectively arranged at the lower end and the side end of the lower flange, the top end of the side steel plate is fixedly arranged in the middle of the top steel plate, the top steel plate includes a middle section close to one end of the web and a free section away from one end of the web, the vertical connecting plate is fixedly arranged at the side end of the middle section, and the top end of the clamping plate is fixedly connected to the lower surface of the free section.

[0014] Furthermore, the gaps between the bottom steel plate and the side steel plate and the lower flange are all 2 to 4 mm.

[0015] Furthermore, the clamping plate is integrally formed.

[0016] Furthermore, the clamping plate comprises two left and right L-shaped plates that are fixedly connected.

[0017] Furthermore, the gap between the vertical connecting plate and the web is 40-60 mm.

[0018] Furthermore, the total height h of the steel plate frame and the clamping plate is 0.4 to 0.6 times the total height H of the I-shaped thin-web beam.

[0019] Furthermore, the outer surfaces of the steel plate frame, the vertical connecting plates and the clip-on plates are all coated with fire retardant paint.

[0020] Furthermore, the first bolt and the second bolt are both symmetrically arranged along the central axis plane of the I-shaped thin-web beam.

[0021] Furthermore, a single first bolt or second bolt is arranged between two adjacent clamping plates.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] 1. The utility model adopts a non-destructive reinforcement structure composed of a steel plate frame, a vertical connecting plate, a clamping plate, a plurality of first bolts, a second bolt and an inorganic grouting material, which is tightly clamped and connected with the web and the lower flange of the I-shaped thin web beam, thereby improving the structural strength of the I-shaped thin web beam, and does not need to be provided with a through screw on the web, without damaging the original structure, and can ensure the safety of the reinforcement construction, and has the advantages of convenient construction and short construction period;

[0024] 2. The utility model adopts inorganic materials instead of organic adhesives. After being coated with fire-retardant coating, it can withstand high temperatures and meet the requirements of building fire protection;

[0025] 3. The structure of the clamping plate of the utility model can be adjusted according to the characteristics of the end of the I-shaped thin-web beam along the length direction, thereby improving the overall flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a thin web beam and its BB and CC sections provided by the utility model;

[0027] Figure 2 It is a schematic cross-sectional view of the I-shaped thin web beam non-destructive reinforcement structure in the first embodiment of the utility model;

[0028] Figure 3 It is a side schematic diagram of the non-destructive reinforcement structure of the I-shaped thin web beam of the utility model;

[0029] Figure 4 It is a side view of the I-shaped thin web beam non-destructive reinforcement structure in the second embodiment of the utility model;

[0030] Figure numerals: 1. I-shaped thin-web beam; 2. Steel plate frame; 21. Bottom steel plate; 22. Side steel plate; 23. Top steel plate; 231. Middle section; 232. Free section; 24. Opening; 3. Vertical connecting plate; 41. First bolt; 42. Second bolt; 5. Snap-in plate; 6. Inorganic grouting material. DETAILED DESCRIPTION

[0031] In order to further understand the content, features and functions of the utility model, the following embodiments are given, together with the attached Figures 1 to 4 The detailed instructions are as follows.

[0032] like Figures 1 to 3 As shown, the first embodiment of the utility model provides an I-shaped thin-web beam non-destructive reinforcement structure, which is arranged at the I-shaped section corresponding to the middle BB section, excluding the T-shaped ends corresponding to the CC sections at both ends, including a steel plate frame 2, a vertical connecting plate 3, an inorganic grouting material 6, a plurality of clamping plates 5, a plurality of horizontally arranged first bolts 41 and a plurality of second bolts 42:

[0033] The steel plate frame 2 is sleeved on the lower flange and the web of the I-shaped thin web beam 1, and an opening 24 for accommodating the web is opened in the middle of the upper surface;

[0034] Inorganic grouting material 6 is filled between the steel plate frame 2 and the I-shaped thin-web beam 1 to connect the steel plate frame 2 and the I-shaped thin-web beam 1 into a whole;

[0035] A plurality of clamping plates 5 are arranged at intervals along the length direction of the I-shaped thin-web beam 1, and a single clamping plate 5 is U-shaped as a whole and is fixedly sleeved outside the steel plate frame 2;

[0036] A plurality of first bolts 41 are arranged horizontally, and a bolt rod portion of a single first bolt 41 is fixedly arranged on the inner surface of the steel plate frame 2;

[0037] A vertical connecting plate 3 is arranged along the length direction of the I-shaped thin-web beam 1, and is used to fix the free end of the steel plate frame 2 corresponding to the opening 24 and the heads of the plurality of first bolts 41, wherein the free end is a side close to the I-shaped thin-web beam 1, and a hole is provided at the lower end of the vertical connecting plate 3 for the bolt rod of the first bolt 41 to pass through;

[0038] A plurality of second bolts 42 are arranged in parallel below the first bolt 41, and the bolt rod of a single second bolt 42 is fixedly arranged on the inner surface of the steel plate frame 2. By arranging the first bolt 41 and the second bolt 42, the tightness of the connection between the I-shaped thin-web beam 1 and the steel plate frame 2 is further improved without damaging the I-shaped thin-web beam 1.

[0039] The utility model adopts a non-destructive reinforcement structure composed of a steel plate frame, a vertical connecting plate, a clamping plate, a plurality of first bolts, a second bolt and an inorganic grouting material, which is tightly clamped and connected with the web and the lower flange of the I-shaped thin-web beam, thereby improving the structural strength of the I-shaped thin-web beam, and does not need to be provided with through screws on the web, so as to cause no damage to the original structure and ensure the safety of the reinforcement construction, with the advantages of convenient construction and short construction period; in addition, the above-mentioned structures all adopt inorganic materials instead of organic adhesives, and can withstand high temperatures after being coated with fire-retardant paint, meeting the fire protection requirements of the building.

[0040] like Figures 2 to 4 As shown, the only difference between the two embodiments of the present invention is the structural form of the clamping plate 5 .

[0041] As the first embodiment of the present utility model, Figures 2-3 As shown, the above-mentioned clamping plate 5 is integrally formed, so there is no need for subsequent welding, which is convenient for construction.

[0042] As a second embodiment of the present utility model, Figure 4 As shown, the above-mentioned clamping plate 5 includes two left and right L-shaped plates that are fixedly welded, which facilitates improving the installation accuracy.

[0043] In this embodiment, Figures 2 to 4As shown, the steel plate frame 2 comprises a bottom steel plate 21, a side steel plate 22 and a top steel plate 23 which are fixedly connected by welding in sequence. The bottom steel plate 21 and the side steel plate 22 are respectively arranged at the lower end and the side end of the lower flange of the I-shaped thin web beam 1, and the inorganic grouting material 6 is filled in the middle. The top end of the side steel plate 22 is fixedly arranged at the middle part of the top steel plate 23 by welding. The top steel plate 23 comprises a middle section 231 close to one end of the web and a free section 232 away from one end of the web. The vertical connecting plate 3 is fixedly arranged at the side end of the middle section 231 by welding, and the top end of the clamping plate 5 is fixedly connected to the lower surface of the free section 232 by welding.

[0044] In this embodiment, the gaps between the bottom steel plate 21 and the side steel plate 22 and the lower flange are all 3 mm, and other values ​​of 2 to 4 mm may also be used to enhance the strength of the overall structure.

[0045] In this embodiment, the gap between the vertical connecting plate 3 and the web is 50 mm, and other values ​​between 40 and 60 mm may also be used, thereby enhancing the strength of the overall structure and reserving a space for grouting.

[0046] In this embodiment, Figure 3 As shown, a single first bolt 41 or a single second bolt 42 is disposed between two adjacent clamping plates 5 to avoid interference.

[0047] In this embodiment, the total height h of the steel plate frame 2 and the clamping plate 5 is half of the total height H of the I-shaped thin-web beam 1, and other values ​​between 0.4 and 0.6 may also be used.

[0048] In this embodiment, the outer surfaces of the steel plate frame 2, the vertical connecting plate 3 and the clamping plate 5 are all coated with fire retardant paint to meet the building fire protection requirements.

[0049] In this embodiment, the first bolt and the second bolt are both symmetrically arranged along the central axis of the I-shaped thin-web beam, thereby ensuring the overall structural stability.

[0050] The construction process of the I-shaped thin web beam non-destructive reinforcement structure of this embodiment includes the following steps:

[0051] 1) The screw parts of the plurality of first bolts 41 pass through the openings at the lower ends of the left and right vertical connecting plates 3;

[0052] 2) Welding the bolt rods of the first bolt 41 and the second bolt 42 to the side steel plate 22;

[0053] 3) Weld the bottom steel plate 21 and the side steel plate 22 together and install them to the designated position;

[0054] 4) Pour inorganic grouting material into the gap between the bottom steel plate 21 and the side steel plate 22 and the lower flange of the I-shaped thin web beam 1;

[0055] 5) Fill high-strength inorganic grouting material between the side steel plate 22 and the web;

[0056] 6) Connect the top steel plate 23 to the side of the vertical connecting plate 3 and the top of the side steel plate 22 by welding;

[0057] 7) Welding the clamping plate 5 makes the reinforcement area form a solid whole, wherein the top end of the clamping plate 5 is connected to the free section 232;

[0058] 8) All exposed steel structure surfaces shall be painted with fire retardant paint.

[0059] The utility model described above in the present invention only expresses the implementation method of the utility model embodiment, and cannot be understood as limiting the scope of the utility model patent, nor is it any form of limitation on the structure of the utility model embodiment. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the utility model embodiment, several changes and improvements can be made, which all belong to the protection scope of the utility model embodiment.

Claims

1. An I-shaped thin web beam lossless reinforcement structure, characterized in that: include: The steel plate frame (2) is sleeved on the lower flange and the web of the I-shaped thin web beam (1), and an opening (24) for accommodating the web is opened in the middle of the upper surface; Inorganic grouting material (6) is filled between the steel plate frame (2) and the I-shaped thin-web beam (1) and is used to connect the steel plate frame (2) and the I-shaped thin-web beam (1) into a whole; A plurality of clamping plates (5) are arranged at intervals along the length direction of the I-shaped thin-web beam (1); a single clamping plate (5) is U-shaped as a whole and is fixedly sleeved outside the steel plate frame (2); A plurality of first bolts (41) arranged horizontally, wherein a bolt rod portion of a single first bolt (41) is fixedly arranged on the inner surface of the steel plate frame (2); A vertical connecting plate (3) used for fixedly connecting the free end of the steel plate frame (2) corresponding to the opening (24) and the heads of the plurality of first bolts (41); A plurality of second bolts (42) are arranged in parallel below the first bolt (41), and a bolt rod portion of a single second bolt (42) is fixedly arranged on the inner surface of the steel plate frame (2).

2. The I-shaped thin-web beam lossless reinforcement structure according to claim 1, characterized in that: The steel plate frame (2) comprises a bottom steel plate (21), a side steel plate (22) and a top steel plate (23) which are fixedly connected in sequence, the bottom steel plate (21) and the side steel plate (22) are respectively arranged at the lower end and the side end of the lower flange, the top end of the side steel plate (22) is fixedly arranged in the middle of the top steel plate (23), the top steel plate (23) comprises a middle section (231) close to one end of the web and a free section (232) away from one end of the web, the vertical connecting plate (3) is fixedly arranged at the side end of the middle section (231), and the top end of the clamping plate (5) is fixedly connected to the lower surface of the free section (232).

3. The I-shaped thin-web beam lossless reinforcement structure according to claim 2, characterized in that: The gaps between the bottom steel plate (21) and the side steel plate (22) and the lower flange are both 2 to 4 mm.

4. The I-shaped thin-web beam lossless reinforcement structure according to claim 1, characterized in that: The clamping plate (5) is integrally formed.

5. The I-shaped thin-web beam lossless reinforcement structure according to claim 1, characterized in that: The clamping plate (5) comprises two left and right L-shaped plates which are fixedly connected.

6. The I-shaped thin-web beam lossless reinforcement structure according to claim 1, characterized in that: The gap between the vertical connecting plate (3) and the web is 40 to 60 mm.

7. The I-shaped thin-web beam lossless reinforcement structure according to claim 1, characterized in that: The total height h of the steel plate frame (2) and the clamping plate (5) is 0.4 to 0.6 times the total height H of the I-shaped thin-web beam (1).

8. The I-shaped thin-web beam lossless reinforcement structure according to claim 1, characterized in that: The outer surfaces of the steel plate frame (2), the vertical connecting plate (3) and the clamping plate (5) are all coated with fire retardant paint.

9. The I-shaped thin-web beam lossless reinforcement structure according to claim 1, characterized in that: The first bolt (41) and the second bolt (42) are both symmetrically arranged along the central axis of the I-shaped thin-web beam (1).

10. The I-shaped thin-web beam lossless reinforcement structure according to claim 1, characterized in that: A single first bolt (41) or second bolt (42) is arranged between two adjacent clamping plates (5).

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