Construction method of concrete formwork for lower support of viscous damper

Abstract

This invention relates to a construction method for the concrete formwork of the lower support of a viscous damper, comprising the following steps: Step 1: Fix a columnar steel structure support in the middle of the bottom beam frame, with the upper end of the steel support higher than the top surface of the bottom beam; Step 2: Tie the bottom beam reinforcement; Step 3: Tie vertical reinforcement around the steel support, inserting the lower end of the vertical reinforcement into the bottom beam, with the upper end of the vertical reinforcement flush with the upper end of the steel support; Step 4: Pour the bottom beam; Step 5: Arrange multiple U-shaped steels and splice them sequentially to form a ring structure around the vertical reinforcement, with the U-shaped steels fixed with pins, wherein at least one U-shaped steel is a short-sized U-shaped steel, and a U-shaped inclined groove is fixed on the short-sized U-shaped steel.

Description

Technical Field

[0001] This invention relates to the field of formwork technology for the lower support of viscous dampers, specifically a construction method for the concrete formwork of the lower support of viscous dampers. Background Technology

[0002] To ensure that lifeline engineering structures such as buildings and bridges function properly during earthquakes and to reduce earthquake damage, dampers are typically used to reduce seismic energy. Viscous dampers are based on the principle that fluid motion, especially the viscous resistance generated when fluid passes through a throttling orifice, is a type of damper that is related to stiffness and velocity. They are widely used in high-rise buildings, bridges, seismic retrofitting of building structures, vibration damping of industrial pipelines and equipment, and military applications.

[0003] Chinese invention patent with patent number "CN103174300B" discloses a method for installing a viscous damper. The two ends of the viscous damper are fixed to the upper and lower frame beams through viscous damper supports, the viscous damper supports are temporarily reinforced, and then concrete is poured for the viscous damper supports and the lower frame beams. While the above-mentioned technical solution also achieves the casting and fixing of the lower support of the viscous damper, during the casting process, using a fixed rectangular template requires cutting a lateral slit to a certain width on the top steel plate of the viscous damper support to serve as a concrete pouring and vibration port. The cutting position and size are difficult to control. If the slit is too small, it will not be conducive to concrete pouring and vibration; if the slit is too large, it will affect the stress safety of the viscous damper support. In addition, processing wooden templates affects the construction progress and has a low recycling rate. Using wooden boards to form the template for the viscous damper support is not easy to fix to the same plane, which can easily lead to bulging, loose joints, etc., resulting in concrete leakage, poor flatness, and increased concrete repair work.

[0004] In summary, inventing a viscous damper lower support template that is easy to assemble and disassemble, has a high reusability, facilitates the casting of the lower support of the viscous damper, and reduces the need for subsequent repairs is one of the problems that urgently need to be solved by those skilled in the art at this stage. Summary of the Invention

[0005] This invention aims to solve the problems of low reusability of formwork for the lower support of viscous dampers, inconvenient disassembly and assembly, easy bulging of formwork, and loose joints, thereby providing a construction method for concrete formwork for the lower support of viscous dampers.

[0006] The technical solution adopted by the present invention to solve the aforementioned problem is as follows:

[0007] The construction method for the concrete formwork of the lower support of the viscous damper includes the following steps:

[0008] Step 1: Fix a column-shaped steel support in the middle of the bottom beam frame, with the upper end of the steel support higher than the top surface of the bottom beam;

[0009] Step 2: Tie the bottom beam reinforcement;

[0010] Step 3: Tie vertical reinforcing bars around the steel support, insert the lower end of the vertical reinforcing bars into the bottom beam, and align the upper end of the vertical reinforcing bars with the upper end of the steel support.

[0011] Step 4: Pour the bottom beam;

[0012] Step 5: Arrange multiple U-shaped steels and splice them in sequence to form a ring structure around the vertical reinforcing bars. The U-shaped steels are fixed with pins. At least one of the U-shaped steels is a short-sized U-shaped steel, and a U-shaped inclined groove is fixed to the upper end of the short-sized U-shaped steel.

[0013] The present invention, which adopts the above technical solution, has the following prominent features compared with the prior art:

[0014] A steel support is installed in the middle of the bottom beam to provide stable support for the lower support of the viscous damper. An I-beam is fixed to the upper end of the steel support to fix the pouring position of the upper surface of the lower support and provide a flat upper surface. Vertical reinforcement is installed to further increase the stability of the lower support. The bottom beam is poured first, and then the lower support formwork is spliced, so that the bottom surface of the formwork fits snugly against the upper plane of the bottom beam, preventing concrete from overflowing from the bottom of the formwork during the pouring of the lower support. U-shaped steel is used as the splicing method for the formwork, which facilitates fixing the position, and the close fit between the U-shaped steels reduces concrete leakage. A detachable U-shaped inclined groove is installed to facilitate the disassembly and assembly of the pouring port, which is beneficial for concrete pouring and vibration. This construction method uses standardized formwork and inclined grooves, which allows for fast installation and disassembly, good surface finishing, and reusability, thus improving construction speed. It eliminates external force damage to the support components, facilitates concrete pouring and vibration, improves construction quality, reduces the amount of post-concrete maintenance, and saves construction costs.

[0015] As a preferred embodiment, a further technical solution of the present invention is:

[0016] The steel supports and the I-beams are integrally formed, with at least two steel supports fixed to the I-beams. The integral forming of the steel supports and the I-beams increases the stability of the lower support, while also providing support for the I-beams.

[0017] The upper steel plate of the I-beam has a wider transverse width than the lower steel plate, and the upper end of the vertical reinforcing bars extends to the lower end of the upper steel plate. These vertical reinforcing bars provide external support for the steel support, passing through the lower steel plate and extending to the lower end of the upper steel plate, thus making the structure of the steel support and the I-beam more stable.

[0018] Multiple horizontal reinforcing bars are evenly tied to the vertical reinforcing bars. The ends of the horizontal reinforcing bars are bent to secure them to the outside of the steel support. The horizontal reinforcing bars provide lateral support to the vertical reinforcing bars, making the lower support structure more stable.

[0019] At least two locking pins are evenly distributed between every two U-shaped steel sections. The two U-shaped steel sections at the corner are fixed by two locking pins passing through the angle steel. The locking pin structure allows two U-shaped steel sections to be fixed together easily and quickly, and multiple locking pins can make the fixation more secure; the angle steel fixing at the corner facilitates disassembly and assembly.

[0020] The upper surface of the short U-shaped steel section is aligned with the lower surface of the U-shaped inclined groove. A pin is fixed to the outer inclined surface of the U-shaped groove, with the lower end of the pin at a fixed angle to the upper end. The upper end of the pin is fixed to the lower end of the outer inclined surface of the U-shaped groove. A hollow round tube is fixed to the upper end of the outer surface of the short U-shaped steel section, and the lower end of the pin is inserted into the hollow round tube. The fixed angle between the lower and upper ends of the pin facilitates direct fixation of the U-shaped inclined groove and the short U-shaped steel section during use. This structure is reusable, easy to assemble and disassemble, and simple in design. Attached Figure Description

[0021] Figure 1 This is a flowchart of the construction method of the present invention;

[0022] Figure 2 This is a structural side view of the support formwork under the construction method of the present invention;

[0023] Figure 3 This is a schematic diagram of the support formwork structure in the construction method of this invention;

[0024] In the diagram: 1. I-beam; 2. U-shaped inclined channel; 3. Horizontal reinforcement; 4. Vertical reinforcement; 5. U-shaped steel; 51. Short-sized U-shaped steel; 6. Steel support; 7. Bottom beam. Detailed implementation method:

[0025] The present invention will be further described below with reference to embodiments, which are intended only to provide a better understanding of the invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0026] See Figure 1 The construction method of the concrete formwork for the lower support of the viscous damper includes the following steps:

[0027] Step 1: Fix a column-shaped steel support in the middle of the bottom beam frame, with the upper end of the steel support higher than the top surface of the bottom beam;

[0028] Step 2: Tie the bottom beam reinforcement;

[0029] Step 3: Tie vertical reinforcing bars around the steel support, insert the lower end of the vertical reinforcing bars into the bottom beam, and align the upper end of the vertical reinforcing bars with the upper end of the steel support.

[0030] Step 4: Pour the bottom beam;

[0031] Step 5: Arrange multiple U-shaped steels and splice them in sequence to form a ring structure around the vertical reinforcing bars. The U-shaped steels are fixed with pins. At least one of the U-shaped steels is a short-sized U-shaped steel, and a U-shaped inclined groove is fixed to the upper end of the short-sized U-shaped steel.

[0032] An I-beam 1 is fixed to the upper end of the steel support 6, fixing the pouring position on the upper surface of the steel support and providing a flat upper surface for the lower support. Vertical reinforcing bars 4 are installed to further increase the stress stability of the lower support. The bottom beam 7 is poured first, and then the lower support formwork is spliced, ensuring the bottom surface of the formwork fits snugly against the top surface of the bottom beam 7, preventing concrete from overflowing from the bottom of the formwork during the pouring of the lower support. U-shaped steel 5 is used as the splicing method for easy positioning, and the close fit between the U-shaped steel 5s reduces concrete leakage. A detachable U-shaped inclined groove 2 is installed for easy assembly and disassembly of the pouring port, facilitating concrete pouring and vibration. This construction method uses standardized formwork and inclined grooves, allowing for rapid assembly and disassembly, good surface finishing, and reusability, thus improving construction speed. It eliminates external force damage to the support components, facilitates concrete pouring and vibration, improves construction quality, reduces post-concrete maintenance, and saves construction costs.

[0033] In this embodiment, the steel support 6 and the I-beam 1 are integrally formed structures, with two steel supports 6 fixed to the I-beam 1 in a portal shape; the two steel supports 6 are fixed on both sides of the I-beam 1; the steel supports 6 can be cylindrical, prismatic, shaped steel, or vertical steel plate structures made of iron; the integral formation of the steel supports 6 and the I-beam 1 can increase the stability of the lower support and provide a stable support for the lower support of the viscous damper; at the same time, the steel supports 6 provide support for the I-beam 1.

[0034] Reference Figure 2 In this embodiment, the lateral width of the upper steel plate of the I-beam 1 is greater than the width of the lower steel plate of the I-beam 1, and the upper end of the vertical reinforcing bar 4 extends to the lower end of the upper steel plate of the I-beam 1. When the vertical reinforcing bar 4 is tied, it clamps and secures the lower steel plate of the I-beam 1; the vertical reinforcing bar 4 provides external support for the steel support 6, passes through the lower steel plate of the I-beam 1, and extends to the lower end of the upper steel plate of the I-beam 1, making the structure of the steel support 6 and the I-beam 1 more stable.

[0035] Referring to Figure 2, in this embodiment, multiple transverse reinforcing bars 3 are evenly tied to the vertical reinforcing bar 4. The transverse reinforcing bars 3 are perpendicular to the vertical reinforcing bar 4, and both ends of the transverse reinforcing bars 3 are bent so that the double-sided reinforcing mesh formed by the transverse and vertical reinforcing bars can tightly hug the outer side of the steel support 6. The transverse reinforcing bars 3 provide lateral support for the vertical reinforcing bars 4, making the lower support structure more stable. At the same time, they can also serve as reinforcement in the concrete, increasing the strength of the lower support.

[0036] In this embodiment, at least two locking pins are evenly arranged between every two U-shaped steels 5. Locking pin holes are provided on the sides of every two U-shaped steels 5. The fixing structure can be a combination of steel plates and inserts passing through the locking pin holes, or other fixing structures passing through the locking pin holes, or simply using clamps to hold the sides of the U-shaped steels 5. At corner positions, angle steel is used as a gasket to fix the two U-shaped steels 5, and two locking pins pass through the angle steel to secure them. Using a locking pin structure allows for simple and quick fixing of two U-shaped steels 5 together, and multiple locking pins provide a more secure fixation; the angle steel fixing at corners facilitates assembly and disassembly.

[0037] In this embodiment, the lower support template, which is spliced ​​from U-shaped steel, has a length of 2m, a width of 0.2m, and a height of 1.8m.

[0038] Reference Figure 3 In this embodiment, the upper surface of the short U-shaped steel 51 is aligned with the lower surface of the U-shaped inclined groove 2. A pin is fixed to the outer inclined surface of the U-shaped inclined groove 2, with the lower end of the pin at a fixed angle to the upper end. Specifically, the angle between the extension line of the lower end of the pin and the upper end of the pin is 30 degrees. The upper end of the pin is fixed to the lower end of the outer inclined surface of the U-shaped inclined groove 2. A hollow round tube is fixed to the upper end of the outer surface of the short U-shaped steel 51, and the lower end of the pin is used to insert into the hollow round tube. The fixed angle between the lower and upper ends of the pin facilitates direct fixing of the U-shaped inclined groove 2 and the short U-shaped steel 51 using the pin during use. This construction method can be adjusted according to the size of the lower support on site, and is easy to assemble and disassemble with a simple structure.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes made based on the description and drawings of the present invention are included within the scope of the present invention.

Claims

1. A method of constructing a concrete form for a lower support of a viscous damper, characterized by, The method comprises the following steps: Step one: fixing a columnar steel support in the middle of the bottom beam frame, the upper end of the steel support being higher than the top surface of the bottom beam; Step two: binding the bottom beam steel bars; Step three: binding vertical steel bars around the steel support, the lower end of the vertical steel bars being inserted into the bottom beam, and the upper end of the vertical steel bars being flush with the upper end of the steel support; Step four: pouring the bottom beam; Step five: arranging a plurality of U-shaped steels to be sequentially spliced into a ring structure around the vertical steel bars, the U-shaped steels being fixed by bayonets, at least one of the U-shaped steels being a short-size U-shaped steel, and the upper end of the short-size U-shaped steel being fixed with a U-shaped chute.

2. The construction method of the concrete formwork for the lower support of the viscous damper according to claim 1, characterized in that: The upper end of the steel support is fixed with an I-shaped steel, the steel support and the I-shaped steel being integrally formed, and at least two steel supports are provided to be fixed with the I-shaped steel.

3. The construction method of the lower support concrete form of the viscous damper according to claim 2, characterized in that: The horizontal width of the upper steel plate of the I-shaped steel is greater than the width of the lower steel plate of the I-shaped steel, and the upper end of the vertical steel bars extends to the lower end of the upper steel plate of the I-shaped steel.

4. The construction method of the concrete formwork for the lower support of the viscous damper according to claim 1, characterized in that: A plurality of horizontal steel bars are uniformly bound on the vertical steel bars, and the two ends of the horizontal steel bars are bent to fasten the horizontal steel bars and the vertical steel bars to the outside of the steel support.

5. The construction method of the concrete formwork for the lower support of the viscous damper according to claim 1, characterized in that: At least two bayonets are uniformly arranged between every two U-shaped steels, and the two U-shaped steels at the corner position are fixed by the two bayonets passing through an angle steel.

6. The construction method of the concrete formwork for the lower support of the viscous damper according to claim 1, wherein: The upper surface of the short-size U-shaped steel is butted with the lower surface of the U-shaped chute, the outer inclined surface of the U-shaped chute is fixed with a bayonet, the lower end of the bayonet is at a fixed angle with the upper end of the bayonet, the upper end of the bayonet is fixed at the lower end of the outer inclined surface of the U-shaped chute, the upper end of the outer surface of the short-size U-shaped steel is fixed with a hollow circular tube, and the lower end of the bayonet is used to be inserted into the hollow circular tube.

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