A full assembly type soft steel grading yield damper of shearing type and construction method

Abstract

This invention belongs to the field of disaster prevention and seismic mitigation in building structures, and specifically relates to a prefabricated shear-type mild steel graded yield damper, comprising an upper connecting plate, a lower connecting plate, connecting angle steel, T-shaped steel, multiple shear yield plates, and buckling-restrained braces. Shear yield plates are symmetrically arranged between the upper and lower connecting plates, each including outer and inner yield components: the outer component consists of two shear plates, connected at their upper and lower ends to the connecting plate via angle steel; the inner component consists of two shear plates arranged side-by-side, connected at their upper and lower ends to the connecting plate via T-shaped steel. The buckling-restrained braces include Z-shaped support plates positioned above and below the outer side of the inner plate and an out-of-plane buckling-restrained clamping plate between the inner plate. The Z-shaped support plates are connected to the corresponding inner plate and clamping plate to achieve graded yielding and out-of-plane stability. This invention achieves good seismic performance, dissipates energy through graded yielding during earthquakes, and is easy to replace after an earthquake.

Description

Technical Field

[0001] This invention belongs to the field of disaster prevention and vibration reduction of building structures, and specifically relates to a fully assembled shear-type mild steel graded yield damper. Background Technology

[0002] Metal shear dampers are widely used in seismic design because they absorb seismic energy through the shear plastic deformation of metals (such as low-carbon steel and lead alloys), exhibiting full hysteresis curves and high energy dissipation density. However, existing metal shear dampers suffer from incomplete yielding in earthquakes of varying magnitudes, making them unsuitable for accurately responding to earthquakes of different magnitudes. Furthermore, replacing incompletely yielding metal dampers is costly. Therefore, this invention proposes a fully assembled shear-type soft steel graded yield damper, which offers advantages such as controllable yield point, convenient installation, and low cost for partial replacement, effectively addressing the significant problems of existing metal dampers. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a fully assembled shear-type mild steel graded yield damper that achieves good seismic performance, dissipates energy in stages during earthquakes, and is easy to replace after earthquakes.

[0004] To achieve the above objectives, the present invention employs the following technical solution: An assembled shear-type mild steel graded yield damper includes: an upper connecting plate and a lower connecting plate connected by high-strength bolts, connecting angle steel, T-shaped steel, multiple shear yield plates, and buckling-restrained braces; multiple shear yield plates are symmetrically arranged between the upper and lower connecting plates, each shear yield plate including an outer yield component and an inner yield component; the outer yield component includes an outer first shear yield plate and an outer second shear yield plate respectively arranged on the left and right sides, with the upper and lower ends of the outer first shear yield plate and the outer second shear yield plate respectively connected to the upper and lower connecting plates via connecting angle steel; the inner yield component includes an inner first shear yield plate and an inner second shear yield plate arranged side by side, with the upper and lower ends of the inner first shear yield plate and the inner second shear yield plate respectively connected to the upper and lower connecting plates via T-shaped steel; the buckling-restrained braces include out-of-plane buckling-restrained Z-shaped support plates and out-of-plane buckling-restrained clamping plates arranged on the upper and lower parts of the outer sides of the inner first shear yield plate and the inner second shear yield plate; An out-of-plane buckling-resistance clamp is provided between the inner first shear yield plate and the inner second shear yield plate, and the out-of-plane buckling-resistance Z-shaped support plate is connected to the inner first shear yield plate or inner second shear yield plate and the out-of-plane buckling-resistance clamp on the corresponding side.

[0005] The upper part of the inner first shear yield plate and the inner second shear yield plate have horizontally arranged elongated holes for connecting high-strength bolts, while the lower part has round holes for connecting high-strength bolts.

[0006] The outer first shear yield plate, outer second shear yield plate, inner first shear yield plate, and inner second shear yield plate are all made of mild steel.

[0007] A construction method for a prefabricated shear-type mild steel graded yield damper, the specific steps of which are as follows: Step 1: Assembly of the inner yielding component The inner first shear yield plate and the inner second shear yield plate are respectively connected to the web plates of the upper and lower T-shaped steels; high-strength bolts are used to pass through the horizontally set elongated holes at the upper part of the inner shear yield plate and fasten them to the web plates of the T-shaped steels. During installation, it is necessary to ensure that the bolts are located in the middle of the elongated holes to reserve space for horizontal sliding deformation. High-strength bolts are used to pass through the circular holes provided at the bottom of the inner shear yield plate and are fastened to the web of the T-shaped steel as a fixed end; Step 2: Assembly of outer yielding member and out-of-plane buckling-restrained brace The four connecting angle steels, the outer first shear yield plate, the outer second shear yield plate, and the four out-of-plane buckling-resistance Z-shaped support plates are combined and connected. High-strength bolts are used to connect the upper and lower connecting angle steels to an outer shear yield plate and two out-of-plane buckling-resistance Z-shaped support plates. The outer shear yield plate is placed on the inner right-angle face of the connecting angle steel, and the two out-of-plane buckling-resistance Z-shaped support plates are placed on the outer right-angle face of the connecting angle steel respectively. The other outer component is assembled symmetrically in the same way. Step 3: Overall Assembly and Connection The inner component completed in step one and the two outer components completed in step two are then assembled with the upper connecting plate and the lower connecting plate, respectively.

[0008] Compared with existing technologies, the beneficial effects of this invention are: 1. By utilizing the distinct yield steps of mild steel and the elongated hole structure on the inner shear yield plate, the force transmission mechanism is optimized, additional bending moments are avoided, and the shear-type mild steel damper achieves graded yield energy dissipation during earthquakes, thereby improving the safety and reliability of the overall structure.

[0009] 2. The fully assembled high-strength bolt connection is adopted, which facilitates local replacement after an earthquake, ensuring the seismic performance of the damper while reducing the replacement cost of the damper.

[0010] 3. The combination of out-of-plane buckling-restrained Z-shaped support plate and buckling-restrained clamping plate effectively suppresses out-of-plane buckling deformation of the shear plate and improves hysteretic stability. Attached Figure Description

[0011] Figure 1 This is a perspective view of the present invention.

[0012] Figure 2 This is a front view of the present invention.

[0013] Figure 3 This is a schematic diagram of the first shear yield plate on the outer side.

[0014] Figure 4 This is a schematic diagram of the first shear yield plate on the inner side. Detailed Implementation

[0015] In the description of this invention, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0016] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of these terms in this invention based on the specific circumstances.

[0017] like Figures 1-4 A prefabricated shear-type mild steel graded yield damper includes: an upper connecting plate 1, a lower connecting plate 2, connecting angle steel 5, T-shaped steel 8, multiple shear yield plates, and buckling-restrained braces connected by high-strength bolts; multiple shear yield plates are symmetrically arranged between the upper connecting plate 1 and the lower connecting plate 2, and each shear yield plate includes an outer yield component and an inner yield component; the outer yield component includes an outer first shear yield plate 3 and an outer second shear yield plate 4 respectively arranged on the left and right sides, and the upper and lower ends of the outer first shear yield plate 3 and the outer second shear yield plate 4 are respectively connected to the upper connecting plate 1 and the lower connecting plate 2 through connecting angle steel 5; the inner yield component includes an inner... The inner first shear yield plate 6 and the inner second shear yield plate 7 are connected to the upper connecting plate 1 and the lower connecting plate 2 respectively by T-shaped steel 8 at their upper and lower ends. The buckling-resistance support includes an out-of-plane buckling-resistance Z-shaped support plate 9 and an out-of-plane buckling-resistance clamping plate 10 disposed on the upper and lower parts of the outer side of the inner first shear yield plate 6 and the inner second shear yield plate 7. An out-of-plane buckling-resistance clamping plate 10 is sandwiched between the inner first shear yield plate 6 and the inner second shear yield plate 7. The out-of-plane buckling-resistance Z-shaped support plate 9 is connected to the inner first shear yield plate 6 or the inner second shear yield plate 7 and the out-of-plane buckling-resistance clamping plate 10 on the corresponding side.

[0018] The upper part of the inner first shear yield plate 6 and the inner second shear yield plate 7 has horizontally arranged elongated holes 11 for connecting high-strength bolts, and the lower part has round holes 12 for connecting high-strength bolts, in order to accommodate the deformation requirements under stress.

[0019] The outer first shear yield plate 3, the outer second shear yield plate 4, the inner first shear yield plate 6, and the inner second shear yield plate 7 are all made of mild steel.

[0020] During operation, in minor earthquakes, the two outer shear yield plates begin to dissipate energy first. At this time, due to the relatively small seismic force, the high-strength bolts only slide within the elongated holes 11 at the top of the inner shear yield plate and have not yet contacted the hole walls. Therefore, the inner shear yield plate does not undergo effective displacement and does not participate in energy dissipation. During major earthquakes, as the outer shear yield plates reach their yield displacement, the high-strength bolts reach their sliding distance limit in the upper elongated holes 11, causing the inner shear yield plates to displace and begin dissipating energy. Thus, this damper achieves the purpose of staged yield energy dissipation.

[0021] After a minor earthquake, since the outer shear yield plates have all reached their yield displacement and continue to dissipate energy, they can be partially replaced. After replacing the outer shear yield plates, the damper can restore its graded yield energy dissipation capacity and reduce the cost of replacing the shear energy dissipation plates. After a major earthquake, both the outer and inner shear yield plates will yield, and all shear yield plates can be replaced at the same time.

[0022] A construction method for a prefabricated shear-type mild steel graded yield damper follows the principle of construction from the inside out and connecting before fixing. The specific steps are as follows: Step 1: Assembly of the inner yielding component The inner first shear yield plate 6 and the inner second shear yield plate 7 are respectively connected to the web plates of the upper and lower T-shaped steels 8; high-strength bolts 13 are used to pass through the horizontally set elongated holes 11 at the upper part of the inner shear yield plate and fasten them to the web plates of the T-shaped steels 8. During installation, it is necessary to ensure that the bolts are located in the middle position of the elongated holes 11 to reserve space for horizontal sliding deformation. A high-strength bolt 13 is passed through the circular hole 12 provided at the lower part of the inner shear yield plate and is fastened to the web of the T-shaped steel 8 as a fixed end; Step 2: Assembly of outer yielding member and out-of-plane buckling-restrained brace The four connecting angle steels 5, the outer first shear yield plate 3, the outer second shear yield plate 4, and the four out-of-plane buckling Z-shaped support plates 9 are combined and connected. High-strength bolts 13 are used to connect the upper and lower connecting angle steels 5 to an outer shear yield plate and two out-of-plane buckling-resistance Z-shaped support plates 9. The outer shear yield plate is placed on the inner right-angled surface of the connecting angle steel 5, and the two out-of-plane buckling-resistance Z-shaped support plates 9 are placed on the outer right-angled surface of the connecting angle steel 5 respectively. The other outer component is assembled symmetrically in the same way. Step 3: Overall Assembly and Connection The inner component completed in step one and the two outer components completed in step two are then assembled with the upper connecting plate 1 and the lower connecting plate 2, respectively.

[0023] To make the objectives, technical solutions, and technical effects of this invention clearer, the technical solutions in the embodiments of this invention are now described clearly and completely. However, the embodiments described below are only some embodiments of this invention, not all embodiments. All other embodiments obtained by those skilled in the art in conjunction with the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0024] Example: A prefabricated shear-type mild steel graded yield damper includes: an upper connecting plate 1, a lower connecting plate 2, connecting angle steel 5, T-shaped steel 8, multiple shear yield plates, and buckling-restrained braces connected by M20 high-strength bolts; multiple shear yield plates are symmetrically arranged between the upper connecting plate 1 and the lower connecting plate 2, and each shear yield plate includes an outer yield component and an inner yield component; the outer yield component includes an outer first shear yield plate 3 and an outer second shear yield plate 4 respectively arranged on the left and right sides, and the outer first shear yield plate 3 and the outer second shear yield plate 4... The upper and lower ends are respectively connected to the upper connecting plate 1 and the lower connecting plate 2 via connecting angle steel 5; the inner yielding component includes an inner first shear yielding plate 6 and an inner second shear yielding plate 7 arranged side by side, and the upper and lower ends of the inner first shear yielding plate 6 and the inner second shear yielding plate 7 are respectively connected to the upper connecting plate 1 and the lower connecting plate 2 via T-shaped steel 8 (model TW100×50); the outer first shear yielding plate 3, the outer second shear yielding plate 4, the inner first shear yielding plate 6 and the inner second shear yielding plate 7 are all made of Q235 carbon steel.

[0025] The buckling-resistance brace includes an out-of-plane buckling-resistance Z-shaped brace 9 and an out-of-plane buckling-resistance clamping plate disposed on the upper and lower parts of the outer sides of the inner first shear yield plate 6 and the inner second shear yield plate 7; an out-of-plane buckling-resistance clamping plate 10 is sandwiched between the inner first shear yield plate 6 and the inner second shear yield plate 7 at intervals; the upper screw holes of the inner first shear yield plate 6 and the inner second shear yield plate 7 for connecting high-strength bolts are horizontally arranged elongated holes 11, the elongated holes 11 are 50mm long and 20mm high, and the lower screw holes for connecting high-strength bolts are round holes 12.

[0026] The screw holes on the outer first shear yield plate 3 and the outer second shear yield plate 4 are both round holes. The out-of-plane buckling-resistance Z-shaped support plate 9 is connected to the corresponding inner first shear yield plate 6 or inner second shear yield plate 7 and the out-of-plane buckling-resistance clamping plate 10.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A prefabricated shear-type mild steel graded yield damper, characterized in that, include: The system comprises an upper connecting plate, a lower connecting plate, connecting angle steel, T-shaped steel, multiple shear yield plates, and buckling-restrained braces connected by high-strength bolts. Multiple shear yield plates are symmetrically arranged between the upper and lower connecting plates. Each shear yield plate includes an outer yielding component and an inner yielding component. The outer yielding component includes a first outer shear yield plate and a second outer shear yield plate respectively located on the left and right sides. The upper and lower ends of the first and second outer shear yield plates are connected to the upper and lower connecting plates respectively via connecting angle steel. The inner yielding component includes a first inner shear yield plate and a second inner shear yield plate arranged side-by-side. The upper and lower ends of the first and second inner shear yield plates are connected to the upper and lower connecting plates respectively via T-shaped steel. The buckling-restrained braces include out-of-plane buckling-restrained Z-shaped braces and out-of-plane buckling-restrained clamps located on the upper and lower outer sides of the first and second inner shear yield plates. An out-of-plane buckling-resistance clamp is provided between the inner first shear yield plate and the inner second shear yield plate, and the out-of-plane buckling-resistance Z-shaped support plate is connected to the inner first shear yield plate or inner second shear yield plate and the out-of-plane buckling-resistance clamp on the corresponding side.

2. The assembled shear-type mild steel graded yield damper according to claim 1, characterized in that, The upper part of the inner first shear yield plate and the inner second shear yield plate have horizontally arranged elongated holes for connecting high-strength bolts, while the lower part has round holes for connecting high-strength bolts.

3. The assembled shear-type mild steel graded yield damper according to claim 1, characterized in that, The outer first shear yield plate, outer second shear yield plate, inner first shear yield plate, and inner second shear yield plate are all made of mild steel.

4. The construction method of a prefabricated shear-type mild steel graded yield damper according to claim 1, characterized in that, The specific steps are as follows: Step 1: Assembly of the inner yielding component The inner first shear yield plate and the inner second shear yield plate are respectively connected to the web plates of the upper and lower T-shaped steels; high-strength bolts are used to pass through the horizontally set elongated holes at the upper part of the inner shear yield plate and fasten them to the web plates of the T-shaped steels. During installation, it is necessary to ensure that the bolts are located in the middle of the elongated holes to reserve space for horizontal sliding deformation. High-strength bolts are used to pass through the circular holes provided at the bottom of the inner shear yield plate and are fastened to the web of the T-shaped steel as a fixed end; Step 2: Assembly of outer yielding member and out-of-plane buckling-restrained brace The four connecting angle steels, the outer first shear yield plate, the outer second shear yield plate, and the four out-of-plane buckling-resistance Z-shaped support plates are combined and connected. High-strength bolts are used to connect the upper and lower connecting angle steels to an outer shear yield plate and two out-of-plane buckling-resistance Z-shaped support plates. The outer shear yield plate is placed on the inner right-angle face of the connecting angle steel, and the two out-of-plane buckling-resistance Z-shaped support plates are placed on the outer right-angle face of the connecting angle steel respectively. The other outer component is assembled symmetrically in the same way. Step 3: Overall Assembly and Connection The inner component completed in step one and the two outer components completed in step two are then assembled with the upper connecting plate and the lower connecting plate, respectively.

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