Deformation control device for large-span and high-strength steel secondary beam construction and construction method

Abstract

The invention discloses a deformation control device for large-span and high-strength steel secondary beam construction and a construction method.The device comprises a secondary beam, a floor / roof floor support plate and a concrete layer which are sequentially arranged from bottom to top, a supporting rod is arranged below the secondary beam, and a detachable plug pin type clamp is arranged between the supporting rod and the secondary beam; a pre-tightening force adjusting device is arranged between the supporting rod and the secondary beam, and a beam end connecting assembly and a supporting rod connecting assembly which are used for being connected with the pre-tightening force adjusting device are arranged at the two ends of the secondary beam and the bottom of the supporting rod respectively. The bolt type clamp design is adopted, various secondary beam specifications can be compatible, good universality is achieved, meanwhile, a conventional tool combination is used for tensioning, the mounting and dismounting steps are effectively simplified, repeated use is achieved, the overall occupied space is small, a high supporting frame does not need to be arranged, and construction of a lower structure is not affected. The method is suitable for large-span and heavy-load building structures such as industrial upstairs and planting roofs, and has good application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of building steel structures, and in particular to a deformation control device and a construction method for the construction of large-span, high-strength steel secondary beams. Background Art

[0002] With the acceleration of urbanization and the improvement of people's quality of life, the design of building structures is moving towards large column grids, large bays, large spans and multifunctionality. In large-span and heavy-load buildings, the use of steel-concrete composite structures can give full play to the material properties of steel and concrete and greatly improve the stress performance of components / structures. However, since the combined effect of composite beams has not yet been formed during the construction stage, relying solely on the steel beams to bear or maintain stability will produce large deflections, making it difficult to control deformation during the construction stage. At present, the temporary support frame generally used for deformation control in composite beam construction needs to be erected after the cast-in-place concrete of the next floor slab solidifies, which prolongs the entire construction period. It also has to wait until the maintenance of the current floor slab is completed before it can be removed, which occupies a large space and affects the construction of related processes of the lower structure. It is also costly and cumbersome to install and remove.

[0003] Therefore, in order to solve the above problems, it is necessary to propose a deformation control device and a construction method for the construction of large-span, high-strength steel secondary beams. Summary of the invention

[0004] The present invention provides a deformation control device and construction method for the construction of large-span, high-strength steel secondary beams, which solves the problems of existing construction deformation control devices affecting the construction of the lower structure, high cost, cumbersome installation and removal, and long construction period.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A deformation control device for the construction of large-span, high-strength steel secondary beams, comprising a secondary beam, a floor / roof decking plate, and a concrete layer arranged in sequence from bottom to top, a strut is arranged below the secondary beam, a detachable latch-type clamp is arranged between the strut and the secondary beam, a preload adjustment device is arranged between the strut and the secondary beam, and beam end connection components and strut connection components for connecting the preload adjustment device are respectively arranged at both ends of the secondary beam and the bottom of the strut.

[0006] Furthermore, the latch-type clamp includes a left clamp and a right clamp, each of which includes an upper clamp and a lower clamp, and the ends of the two lower clamps are respectively provided with protrusions and grooves of matching shapes, and the two constitute a latch-type structure.

[0007] Furthermore, a threaded hole is provided on the upper clamping plate, and a fastening bolt is provided in the threaded hole.

[0008] Furthermore, the lower clamping plate is connected to a vertical bottom plate, and corresponding bolt holes are provided on the two vertical bottom plates, and connecting bolts are provided in the bolt holes.

[0009] Furthermore, the vertical bottom plate is rotatably connected to the support rod, and a pin hole for connection is provided on the vertical bottom plate.

[0010] Furthermore, the beam end connection assembly includes a connection plate fixed to the secondary beam, a process hole is opened on the connection plate, and a fixing device connected to the tensioning device is installed on the process hole.

[0011] Furthermore, the support rod connection assembly includes an ear plate fixed to the bottom of the support rod, and the ear plate is connected to a second fixing device connected to the tensioning device.

[0012] Furthermore, the preload force adjusting device comprises a tensioning component, and the tensioning component is provided with a tensioning device for adjusting the preload force of the tensioning component.

[0013] The construction method of the deformation control device for large-span, high-strength steel secondary beam construction comprises the following steps: 1) Install secondary beams and connection nodes; 2) Place the left and right clamps on both sides of the lower flange of the secondary beam, align the protrusions and grooves, ensure that the left and right clamps are tightly attached and lock the lower connecting bolts, and at the same time, tighten the upper fastening bolts and nuts to tighten the secondary beam; 3) Pass one end of the tensioning component through the fixing device and connect it to the connecting plate, and connect the other end to the tensioning device; 4) Align the upper end of the support rod with the pin hole of the latch-type fixture and connect the lower end to the tensioning component using the second fixing device; 5) Use the tensioning device to tension until the designed preload force is reached; 6) Pour the concrete layer and remove the construction deformation control device after final setting. First relax the tension adjustment device to release the pre-tightening force of the tensioning components, and then remove the support rod connection assembly, beam end connection assembly and pin-type clamp in turn.

[0014] In summary, the present invention has the following beneficial effects: (1) The bolt-type clamp and tensioning device used can be quickly assembled and disassembled, greatly simplifying the installation and disassembly steps. Conventional tooling combinations can be used for tensioning and can be repeatedly applied, reducing construction costs, significantly shortening the construction period, and improving construction efficiency; (2) The thickness of the latch-type clamp and the design of the lower vertical plate make it compatible with a variety of secondary beam thicknesses and widths, enhancing the versatility and adaptability of the device; (3) The device does not need to be erected on the lower floor slab. It can be erected before the lower floor slab solidifies or is poured. It takes up little space and does not require a high support frame. The normal construction of the lower structure is not affected during the construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front structural schematic diagram of a large-span composite secondary beam construction deformation control device of the present invention.

[0016] Figure 2 This is an enlarged view of point A of a large-span composite secondary beam construction deformation control device of the present invention; Figure 3 for Figure 2 Left view of; Figure 4 It is a schematic diagram of the structure of the left clamp and the right clamp of the present invention; Figure 5 for Figure 4 Top view of the .

[0017] Marking instructions: 1. Secondary beam; 2. Floor / roof decking; 3. Concrete layer; 4. Pin-type clamp; 5. Strut; 6. Tensioning device; 7. Beam end connection assembly; 8. Strut connection assembly; 41. Left clamp; 42. Right clamp; 43. Thread; 44. Fastening bolt; 45. Nut; 46. Connecting bolt; 71. Connecting plate; 72. Fixing device one; 73. Tensioning component; 81. Fixing device two; 82. Ear plate; 411. Upper clamp plate of left clamp; 412. Lower clamp plate of left clamp; 413. Vertical bottom plate of left clamp; 421. Upper clamp plate of right clamp; 422. Lower clamp plate of right clamp; 423. Vertical bottom plate of right clamp; 711. Process hole; 4121. Bump; 4221. Groove; 4131. Bolt hole; 4132. Pin shaft hole. DETAILED DESCRIPTION

[0018] The following is combined with Figures 1 to 5 The specific implementation manner of a deformation control device and a construction method for the construction of a large-span, high-strength steel secondary beam of the present invention is further described in detail.

[0019] A deformation control device for the construction of a large-span, high-strength steel secondary beam comprises a secondary beam 1, a floor / roof deck 2, a concrete layer 3, a latch-type clamp 4, a strut 5, a tensioning device 6, a beam end connection assembly 7 and a strut connection assembly 8. The upper flange of the secondary beam 1 is connected to the concrete layer 3 by bolts to form an integral coordinated force, the latch-type clamp 4 is detachably connected between the secondary beam 1 and the strut 5, and a preload adjustment device is arranged below the secondary beam 1 and tied to both ends of the secondary beam 1.

[0020] The latch-type clamp 4 includes a left clamp 41 and a right clamp 42. The left clamp 41 includes a left clamp upper clamp plate 411, a left clamp lower clamp plate 412 and a left clamp vertical bottom plate 413, and the left clamp lower clamp plate 412 is provided with a rectangular protrusion 4121; the right clamp 42 includes a right clamp upper clamp plate 421, a right clamp lower clamp plate 422 and a right clamp vertical bottom plate 423, and the right clamp lower clamp plate 422 is provided with a rectangular groove 4221 corresponding to the size and position of the rectangular protrusion 4121, and a latch-type structure is formed between the right clamp lower clamp plate 422 and the protrusion 4121.

[0021] The left clamp upper plate 411 and the right clamp upper plate 421 are both provided with threaded holes 43 to fix the fastening bolts 44 . By simultaneously screwing the nuts 45 and the fastening bolts 44 , the lower flange of the secondary beam 1 is tightened.

[0022] The left clamp vertical bottom plate 413 and the right clamp vertical bottom plate 423 are both provided with bolt holes 4131 and pin shaft holes 4132. The center lines of the bolt holes 4131 are on the same horizontal line. The clamps are connected as a whole by connecting bolts 44 and can be flexibly disassembled for use.

[0023] The latch-type clamp 4 is provided with sufficient thickness to be compatible with secondary beams 1 of various conventional sizes, and the latch-type clamp 4 does not need to be completely clamped with the width direction of the lower flange of the secondary beam 1, but the connection standard is that the left clamp 411 and the right clamp 421 fit firmly.

[0024] The beam end connection assembly 7 includes a connection plate 71 and a fixing device 72. The preload force adjustment device includes a tensioning component 73 and a tensioning device 6 for tension adjustment. The connection plate 71 is provided with a process hole 711 and is connected to the tensioning component 73 through the fixing device 72.

[0025] The support rod connection assembly 8 includes a second fixing device 81 and an ear plate 82 welded to the lower end of the support rod 5 , and the tensioning component 73 passes through the second fixing device 81 and is connected to the ear plate 82 .

[0026] A construction method of a deformation control device for large-span, high-strength steel secondary beam construction comprises the following steps: 1) Install secondary beam 1 and connection nodes.

[0027] 2) Place the left clamp 41 and the right clamp 42 on both sides of the lower flange of the secondary beam 1 respectively, align the rectangular protrusion 4121 and the rectangular groove 4221, ensure that the left clamp 41 and the right clamp 42 are tightly attached and lock the lower end bolt 46, and at the same time, tighten the upper end fastening bolt 44 and nut 45 to tighten the lower flange of the secondary beam 1.

[0028] 3) One end of the tensioning component 73 passes through the fixing device 72 and is connected to the connecting plate 71 , and the other end is connected to the tensioning device 6 .

[0029] 4) Align the upper end of the support rod 5 with the pin hole 4132 of the latch-type clamp 4 and connect it, and use the second fixing device 81 to connect the lower end with the tensioning component 73.

[0030] 5) Use the tensioning device 6 to gradually tension the tensioning member 73 until the designed preload force is reached.

[0031] 6) Pour the concrete layer 3, and remove the construction deformation control device after final setting. First, loosen the tensioning device 6, release the preload force of the tensioning component 73, and then remove the support rod connection assembly 8, the beam end connection assembly 7 and the pin-type clamp 4 in turn.

[0032] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A deformation control device for the construction of large-span, high-strength steel secondary beams, characterized in that: It includes a secondary beam, a floor / roof decking plate, and a concrete layer which are arranged in sequence from bottom to top, a strut is arranged under the secondary beam, a detachable latch-type clamp is arranged between the strut and the secondary beam, a preload adjustment device is arranged between the strut and the secondary beam, and beam end connection components and strut connection components for connecting the preload adjustment device are respectively arranged at both ends of the secondary beam and the bottom of the strut.

2. The deformation control device for the construction of large-span, high-strength steel secondary beams according to claim 1 is characterized in that: The latch-type clamp comprises a left clamp and a right clamp, each of which comprises an upper clamp and a lower clamp, and the ends of the two lower clamps are respectively provided with protrusions and grooves of matching shapes, and the two constitute a latch-type structure.

3. The deformation control device for the construction of large-span, high-strength steel secondary beams according to claim 2 is characterized in that: The upper clamping plate is provided with a threaded hole, and a fastening bolt is provided in the threaded hole.

4. The deformation control device for large-span, high-strength steel secondary beam construction according to claim 2 is characterized in that: The lower clamping plate is connected to the vertical bottom plate, and corresponding bolt holes are provided on the two vertical bottom plates, and connecting bolts are arranged in the bolt holes.

5. The deformation control device for the construction of large-span, high-strength steel secondary beams according to claim 4 is characterized in that: The vertical bottom plate is rotatably connected to the support rod, and a pin hole for connection is provided on the vertical bottom plate.

6. The deformation control device for the construction of large-span, high-strength steel secondary beams according to claim 1 is characterized in that: The beam end connection assembly includes a connection plate fixed to the secondary beam, a process hole is opened on the connection plate, and a fixing device 1 connected to the tensioning device is installed on the process hole.

7. The deformation control device for the construction of large-span, high-strength steel secondary beams according to claim 1 is characterized in that: The support rod connection assembly includes an ear plate fixed to the bottom of the support rod, and the ear plate is connected to a second fixing device connected to the tensioning device.

8. The deformation control device for the construction of large-span, high-strength steel secondary beams according to claim 6 or 7, characterized in that: The preload force adjusting device comprises a tensioning component, and the tensioning component is provided with a tensioning device for adjusting the preload force of the tensioning component.

9. The construction method of the deformation control device for large-span, high-strength steel secondary beam construction according to any one of claims 1 to 8, characterized in that: The steps include: 1) Install secondary beams and connection nodes; 2) Place the left and right clamps on both sides of the lower flange of the secondary beam, align the protrusions and grooves, ensure that the left and right clamps are tightly attached and lock the lower connecting bolts, and at the same time, tighten the upper fastening bolts and nuts to tighten the secondary beam; 3) Pass one end of the tensioning component through the fixing device and connect it to the connecting plate, and connect the other end to the tensioning device; 4) Align the upper end of the support rod with the pin hole of the latch-type fixture and connect the lower end to the tensioning component using the second fixing device; 5) Use the tensioning device to tension until the designed preload force is reached; 6) Pour the concrete layer and remove the construction deformation control device after final setting. First relax the tension adjustment device to release the pre-tightening force of the tensioning components, and then remove the support rod connection assembly, beam end connection assembly and pin-type clamp in turn.

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