Assembly type self-resetting shock isolation device suitable for elevated silo

Abstract

An assembly type self-resetting shock insulation device suitable for an elevated silo relates to the technical field of shock absorption equipment, and comprises a steel silo, a supporting frame column, a supporting frame beam, a supporting cross beam, a supporting ring beam, a shock insulation device and a connecting piece of the shock insulation device, the steel silo is supported on the supporting ring beam, the supporting ring beam is supported on the supporting cross beam, and the shock insulation device is connected with the supporting frame column. The supporting cross beams are supported on the supporting frame beams, the supporting frame beams are fixed between the supporting frame columns, silo feet and an annular seat plate are arranged on the lower periphery of the upper portion of the silo, and corresponding bolt hole positions are arranged on the annular seat plate of the steel silo and connected with a shock isolation device. According to the assembly type self-resetting shock isolation device suitable for the elevated silo, the anti-seismic transformation reliability problem of an existing industrial elevated silo is solved, the construction transformation efficiency is improved, the earthquake damage risk is reduced, the earthquake vulnerability of the elevated silo is reduced, and the service life of the elevated silo is prolonged. And finally, the anti-seismic performance and the construction transformation efficiency of the elevated silo structure under an earthquake high-intensity area and an earthquake key monitoring defensive area are improved.

Description

Technical field:

[0001] The invention relates to the technical field of shock absorbing equipment, and in particular to an assembled self-resetting shock isolating device suitable for an elevated silo. Background technology:

[0002] Laminated rubber seismic isolation technology is a technology that sets an isolation layer between the upper structure and the lower structure of the structure to block the transmission of seismic energy. By extending the natural vibration period of the structure and increasing the damping ratio, the response under the action of the earthquake is reduced, thereby significantly reducing the damage to the structure in the earthquake. At present, standard rubber seismic isolation pads are mostly used in building structures with less than 30 floors, small height-width ratio, and small interlayer stiffness. For some urban lifeline projects, such as large elevated silo group projects, the upper part is the silo group and the lower part is the supporting frame. The "top-heavy" mass distribution is an inverted pendulum. The destruction of this structure will not only lead to material loss, but also cause casualties and affect neighboring facilities to cause chain damage. Among them, earthquakes are the main cause of silo structure failure. Frequent small earthquake events cause damage to key functions and cause expensive business interruptions. At present, laminated rubber seismic isolation devices have been used in the base isolation of elevated silos, but there are problems such as overturning moment of the isolation bearing, excessive horizontal shear deformation, and inconvenience for the transformation of existing facilities. Applying the seismic isolation device between the silo and the supporting frame to form an inter-layer seismic isolation system is a new research idea, but there will be problems such as limited installation node size and location, low construction and renovation efficiency, and new structural characteristics need to be designed. In response to the above problems, a special seismic isolation device is needed, which can not only be installed between the elevated silo and the supporting frame, but also has a certain bearing capacity and self-reset ability, so that even if a super-large earthquake occurs, the entire elevated silo seismic isolation system will not collapse. Summary of the invention:

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and to provide an assembled self-resetting seismic isolation device suitable for elevated silos, which solves the problem of reliability of seismic transformation of existing industrial elevated silos, improves construction and transformation efficiency and reduces the risk of earthquake damage, reduces the seismic vulnerability of elevated silos, and ultimately achieves the improvement of seismic performance and construction and transformation efficiency of elevated silo structures in high-intensity earthquake areas and earthquake key monitoring and defense areas.

[0004] In order to solve the problems existing in the background technology, the present invention adopts the following technical scheme: including supporting frame columns, steel silo, supporting frame beams, supporting cross beams, supporting ring beams and seismic isolation devices, the number of supporting frame columns is four, the supporting frame columns are connected by supporting frame beams, the middle of the supporting frame beams are connected by supporting cross beams, the inner circle of the supporting cross beams is fixedly connected to the supporting ring beam, the top of the supporting ring beam is connected to the steel silo through the seismic isolation device, and a steel silo conical hopper is provided at the bottom of the steel silo; the seismic isolation device includes an upper positioning seat plate, a lower positioning seat plate, a connecting plate, a vibration isolation support, a soft steel damping module and a lifting plate, the upper positioning seat plate, the lower positioning seat plate, the connecting plate and the vibration isolation support are all fan-shaped, a groove is provided on the top surface of the lower positioning seat plate, a connecting plate is provided on the groove, a seismic isolation support is provided on the connecting plate, an upper positioning seat plate is provided on the top surface of the center line of the seismic isolation support, a lifting plate is installed on the upper positioning seat plate, and soft steel damping modules are provided on both sides of the seismic isolation support; the seismic isolation support is a laminated rubber seismic isolation pad.

[0005] The top surface of the upper positioning seat plate is provided with two positioning holes, and the top surfaces on both sides of the upper positioning seat plate are respectively provided with two bolt holes.

[0006] The bottom of the steel silo is provided with silo feet, which are fixed on the annular seat plate, and the annular seat plate is connected with the positioning hole 2 of the upper positioning seat plate in the seismic isolation device through the bolt 1.

[0007] A positioning hole is provided in the groove on the top surface of the lower positioning seat plate, and the positioning hole is connected to the support ring beam through anchor bolts; strip grooves are provided on the top surfaces on both sides of the lower positioning plate, and the strip grooves are connected to the support ring beam anchor bolts.

[0008] The mild steel damping module comprises a mild steel sheet, a positioning plate and a bolt hole one. A positioning plate is installed on the upper and lower parts of the mild steel sheet respectively. A bolt hole one is respectively provided on the positioning plate. The bolt holes one of the upper and lower positioning plates are respectively connected to the positioning holes two of the upper positioning seat plate and the lower positioning seat plate through bolts two. The mild steel sheet is one of the energy-absorbing core materials of LY100, LY160 and LY225.

[0009] The lower positioning seat plate is concentrically matched with the seismic isolation support and the upper positioning seat plate, and the inner diameter direction is consistent with the supporting ring beam.

[0010] The number of the seismic isolation devices is several, and the number of installations is determined by calculation according to the load size of the supported steel silo. The ring silo is installed in accordance with the principle of uniformity and symmetry.

[0011] The construction method and specific steps are as follows:

[0012] First, estimate the number of seismic isolation devices required according to the scale of a single steel silo and its additional vertical load, and arrange them symmetrically, arranging the seismic isolation devices in a circular manner; then determine the curvature and center radius of the lower positioning seat plate according to the anchor bolts on the original structure support ring beam, align the upper positioning seat plate concentrically with the lower positioning seat plate, and the center line of the seismic isolation support coincides with the lower positioning seat plate;

[0013] Second, a strip-shaped notch and a positioning hole 1 are reserved at both ends of the lower positioning seat plate. The positioning hole 1 is larger than the outer diameter of the anchor bolt to facilitate nesting and positioning; the width of the positioning plate of the soft steel damping module is determined according to the gap size between the seismic isolation support and the strip-shaped notch, and a margin of 3 to 5 mm is reserved; a bolt hole 1 is reserved in the soft steel damping module for connecting the lower positioning seat plate; a positioning hole 2 that is larger than the outer diameter of the anchor bolt, as well as a bolt hole 2 for connecting the positioning plate are also reserved in the upper positioning seat plate;

[0014] 3. In the factory, the lower positioning seat plate, the seismic isolation support, the upper positioning seat plate, the soft steel damping module and the lifting plate are respectively manufactured and assembled into a seismic isolation device;

[0015] 4. After the seismic isolation device is assembled, it can be transported to the site for installation.

[0016] In the step 3, the specific assembly steps are as follows:

[0017] 1) Use ink to draw the center line at the groove of the lower positioning seat plate and the connecting plate of the seismic isolation support. After aligning the center lines, embed the soft steel damping module into both sides and use bolts 2 to connect the bolt holes together to limit the position. After symmetrical alignment, use welding or bolts to fix the seismic isolation support to the lower positioning seat plate;

[0018] 2) Use bolt 2 to pass the bolt hole 2 on the upper positioning seat plate, connect the mild steel damping module to the hole, and then use welding or bolting to fix the upper positioning seat plate to the seismic isolation support;

[0019] 3) Finally, connect the lifting plate to the upper positioning base plate through the reserved bolt holes to complete the assembly work.

[0020] In the step 4, the specific assembly steps are as follows:

[0021] 1) Disconnect the original steel silo from the supporting ring beam and temporarily lift it using a jacking device;

[0022] 2) Shorten the original anchor bolts to below the thickness of the lower positioning seat plate;

[0023] 3) Transport the seismic isolation device to the vicinity of the hole position through the lifting plate, use the steel bar scanner to measure the position of the longitudinal reinforcement of the supporting ring beam and mark it, and install it by inserting the anchor bolts through the positioning hole. Finally, use anchor bolts to fix the seismic isolation device and the supporting ring beam through the strip groove, avoiding the longitudinal reinforcement position of the supporting ring beam;

[0024] 4) Use the lifting device to slowly adjust the position of the steel silo, and align the bolt hole on the annular base plate with the bolt hole 2 of the upper positioning base plate and use bolt 1 to fix the connection, thus completing the seismic retrofit of the existing elevated silo structure.

[0025] The beneficial effects of the present invention are:

[0026] (1) By adopting the fan-shaped isolation bearing structural characteristics, the problem of adapting the standard laminated rubber isolation device in the prior art to the high-level silo node is solved.

[0027] (2) By means of reserved slots, bolt holes, modular connections and other measures, the seismic isolation device can be produced and assembled in the factory, and the seismic isolation device can be quickly positioned and installed on site, thereby improving the construction and renovation efficiency of the existing technology.

[0028] (3) The mild steel damping module provides bilinear stiffness for the seismic isolation device, and the low yield point mild steel plate provides the structure with the effect of resisting wind loads and frequent earthquakes. When the horizontal force on the structure exceeds the yield strength of the mild steel plate, the seismic isolation bearing will play the role of a horizontal flexible layer and work together through a symmetrical arrangement. On the one hand, it can significantly extend the natural vibration period of the silo, reduce the acceleration response, and reduce the seismic effect. On the other hand, the elastic-plastic deformation of the mild steel plate can provide restoring force and reset function for the seismic isolation bearing after shear deformation, ensuring that the elevated silo can resume normal use in the event of a fortified earthquake, and that the elevated silo will not collapse in the event of a rare earthquake.

[0029] (4) In high-intensity fortification areas and earthquake-focused monitoring and defense areas, the use of traditional reinforced concrete support frames is limited by earthquake-resistant measures, resulting in excessive cross-sectional dimensions, further exacerbating the risk of earthquake collapse. The use of the present invention can save construction costs, reduce the use of building materials and reduce pollution emissions. Description of the drawings:

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 is a top view of the present invention;

[0032] Figure 3 is a side view of the present invention;

[0033] Figure 4It is a schematic diagram of the structure of the separation device of the present invention;

[0034] Figure 5 It is a schematic diagram of the structure of the lower positioning seat plate of the present invention;

[0035] Figure 6 It is a schematic diagram of the structure of the upper positioning seat plate of the present invention;

[0036] Figure 7 It is a schematic diagram of the structure of the mild steel damping module of the present invention;

[0037] Figure 8 It is a partial enlarged view of the connection node of the seismic isolation device of the present invention. Specific implementation method:

[0038] Referring to the figures, the present invention specifically adopts the following implementation mode: including support frame columns 1, steel silo 2, support frame beams 3, support cross beams 4, support ring beams 5 and seismic isolation devices 6, the number of support frame columns 1 is four, the support frame columns 1 are connected by support frame beams 3, the middle of the support frame beams 3 are connected by support cross beams 4, the inner circle of the support cross beam 4 is fixedly connected to the support ring beam 5, the top of the support ring beam 5 is connected to the steel silo 2 through the seismic isolation device 6, and the bottom of the steel silo 2 is provided with a steel silo conical hopper 8; the seismic isolation device 6 includes an upper positioning seat plate 12 , lower positioning seat plate 9, connecting plate 10, vibration isolation support 11, mild steel damping module 13 and hanging plate 14, upper positioning seat plate 12, lower positioning seat plate 9, connecting plate 10 and vibration isolation support 11 are all fan-shaped, the top surface of the lower positioning seat plate 9 is provided with a groove, the groove is provided with a connecting plate 10, the connecting plate 10 is provided with a vibration isolation support 11, the center line top surface of the vibration isolation support 11 is provided with an upper positioning seat plate 12, the hanging plate 14 is installed on the upper positioning seat plate 12, and mild steel damping modules 13 are provided on both sides of the vibration isolation support 11; the vibration isolation support 11 is a laminated rubber vibration isolation pad. The top surface of the upper positioning seat plate 12 is provided with two positioning holes 121, and the top surfaces of both sides of the upper positioning seat plate 12 are respectively provided with two bolt holes 122. The bottom of the steel silo 2 is provided with a silo foot 16, which is fixed on the annular seat plate 18, and the annular seat plate 18 is connected to the positioning hole 2 121 of the upper positioning seat plate 12 in the seismic isolation device 6 through a bolt 17. A positioning hole 1 91 is provided in the groove provided on the top surface of the lower positioning seat plate 9, and the positioning hole 1 91 is connected to the support ring beam 5 through an anchor bolt 7; strip notches 92 are provided on the top surfaces of both sides of the lower positioning plate 9, and the strip notches 92 are connected to the support ring beam 5 with anchor bolts. The soft steel damping module 13 includes a soft steel sheet 131, a positioning plate 132 and a bolt hole 133. A positioning plate 132 is installed on the upper and lower parts of the soft steel sheet 31. The positioning plates 132 are provided with bolt holes 133 respectively. The bolt holes 133 of the upper and lower positioning plates 132 are connected to the positioning holes 121 of the upper positioning seat plate 12 and the lower positioning seat plate 9 through bolts 15 respectively. The soft steel sheet 131 is one of the energy-absorbing core materials of LY100, LY160 and LY225. The lower positioning seat plate 9 is concentrically matched with the seismic isolation support 11 and the upper positioning seat plate 12, and the inner diameter direction is consistent with the supporting ring beam 5. The number of seismic isolation devices 6 is several, and the number of installations is determined by calculation according to the load size of the supported steel silo 2. The ring silo is installed in accordance with the principles of uniformity and symmetry.

[0039] The construction method and specific steps are as follows:

[0040] First, the number of seismic isolation devices 6 required is estimated according to the scale of a single steel silo 2 and its additional vertical load, and the seismic isolation devices 6 are arranged in a symmetrical manner. The curvature and center radius of the lower positioning seat plate 9 are determined according to the anchor bolts 7 on the original structure support ring beam 5. The upper positioning seat plate 12 is concentrically aligned with the lower positioning seat plate 9, and the center line of the seismic isolation support 11 coincides with the lower positioning seat plate 9.

[0041] Second, a strip notch 92 and a positioning hole 91 are reserved at both ends of the lower positioning seat plate 9. The positioning hole 91 is larger than the outer diameter of the anchor bolt 7 to facilitate nesting and positioning; the width of the positioning plate 132 of the soft steel damping module 13 is determined according to the gap size between the seismic isolation support 11 and the strip notch 92, and a margin of 3 to 5 mm is reserved; a bolt hole 133 is reserved in the soft steel damping module 13 for connecting the lower positioning seat plate 9; a positioning hole 121 larger than the outer diameter of the anchor bolt 7 and a bolt hole 122 for connecting the positioning plate 132 are also reserved in the upper positioning seat plate 12;

[0042] 3. In the factory, the lower positioning seat plate 9, the seismic isolation support 11, the upper positioning seat plate 12, the mild steel damping module 13 and the hanging plate 14 are respectively manufactured and assembled to form the seismic isolation device 6;

[0043] Fourth, after the seismic isolation device 6 is assembled, it can be transported to the site for installation.

[0044] In the step 3, the specific assembly steps are as follows:

[0045] 1) Use ink to draw the center line at the groove of the lower positioning seat plate 9 and the connecting plate 10 of the seismic isolation support 11. After aligning the center lines, embed the soft steel damping module 13 into both sides, and connect the bolt hole 133 with the bolt 2 15 to play a limiting role. After symmetrical alignment, the seismic isolation support 11) is fixedly connected to the lower positioning seat plate 9 by welding or bolting;

[0046] 2) The upper positioning seat plate 12 is connected to the mild steel damping module 13 through the second bolt hole 122 with the second bolt 15, and then the upper positioning seat plate 12 is fixedly connected to the seismic isolation support 11 by welding or bolting;

[0047] 3) Finally, the hanging plate 14 is connected to the upper positioning seat plate 12 through the reserved bolt holes to complete the assembly work.

[0048] In the step 4, the specific assembly steps are as follows:

[0049] 1) Disconnect the original steel silo 2 from the supporting ring beam 5 and temporarily lift it using a jacking device;

[0050] 2) Shorten the original anchor bolts 7 to below the thickness of the lower positioning seat plate 9;

[0051] 3) The seismic isolation device 6 is transported to the vicinity of the hole position through the lifting plate 14, and the position of the longitudinal reinforcement of the supporting ring beam 5 is measured and marked using a steel bar scanner, and the anchor bolts 7 are inserted through the positioning hole 91 for positioning and installation, and finally the seismic isolation device 6 and the supporting ring beam 5 are fixed with anchor bolts through the strip notch 92, avoiding the position of the longitudinal reinforcement of the supporting ring beam 5;

[0052] 4) Use the lifting device to slowly adjust the position of the steel silo 2, and align the bolt holes on the annular seat plate 18 with the bolt holes 121 of the upper positioning seat plate 12 and then use bolts 17 to fix the connection, thus completing the seismic transformation of the existing elevated silo structure.

[0053] Embodiment 1

[0054] The present invention includes a steel silo 2, a supporting frame column 1, a supporting frame beam 3, a supporting cross beam 4, a supporting ring beam 5, a seismic isolation device 6 and its connecting parts. The steel silo 2 is supported on the supporting ring beam 5, the supporting ring beam 5 is supported on the supporting cross beam 4, the supporting cross beam 4 is supported on the supporting frame beam 3, and the supporting frame beam 3 is fixed between the supporting frame columns 1. The steel silo 2 includes a cylindrical upper part and a conical hopper 8, and a silo foot 16 and an annular seat plate 18 are provided on the lower periphery of the upper part of the silo, and the annular seat plate 18 of the steel silo 2 has corresponding bolt holes for connecting with the seismic isolation device 6.

[0055] The seismic isolation device 6 is composed of a lower positioning base 9 , a connecting plate 10 , a seismic isolation support 11 , an upper positioning base 12 , a mild steel damping module 13 and a hanging plate 14 .

[0056] The seismic isolation support 11 is a fan-shaped laminated rubber pad, and the curvature of the center line thereof is determined by the number of the anchor bolts 7 of the steel silo 2 before the transformation.

[0057] The number of the seismic isolation devices 6 can be adjusted according to the size of the steel silo 2. The seismic isolation devices 6 can be placed in full around the silo or in symmetrical arrangement of 1 / 2 or 1 / 4, which is suitable for elevated silos with different seismic requirements.

[0058] The seismic isolation device 6 will be transported to the project site after the modules are connected and assembled in the factory, and will be hoisted with the help of the hoisting plate 14. It will be positioned with the original structural anchor bolts 7 on the supporting ring beam 5 through the reserved bolt holes 91 in the lower positioning seat plate 9, and will be fixedly connected with the supporting ring beam 5 by anchor bolts through the reserved strip grooves 91.

[0059] The present invention adopts a mild steel damping module 13, which is composed of a mild steel sheet 131 with a low yield point and a positioning plate 132, which not only provides a reset function for the seismic isolation device, but also can play a limiting function when the seismic isolation support 11 is installed.

[0060] The seismic isolation device 6 connects the steel silo 2 and the lower supporting structure to play the role of a flexible seismic isolation layer. The soft steel damping module 13 provides a reset function and a certain initial yield platform for the seismic isolation device to meet the wind resistance requirements of the elevated silo. The device not only provides sufficient vertical stiffness to meet the bearing capacity requirements, but also provides a smaller horizontal stiffness to extend the natural vibration period and increase the damping ratio to reduce the response under the action of the earthquake, eliminate the swaying effect caused by uneven mass, and significantly reduce the damage to the elevated silo in the earthquake.

[0061] Embodiment 2

[0062] The present invention comprises four supporting frame columns 1, a steel silo 2, a steel silo conical hopper 8, four supporting frame beams 3, a supporting cross beam 4 composed of four secondary beams orthogonal to each other, a supporting ring beam 5 inscribed in the inner side of the supporting cross beam 4, a seismic isolation device 6 and anchor bolts 7.

[0063] The lower periphery of the cylindrical upper part of the steel silo 2 is provided with a silo foot 16 and an annular seat plate 18, and is connected to the seismic isolation device 6 by bolts 17.

[0064] The construction method of the above-mentioned assembled self-resetting seismic isolation device applicable to the elevated silo in this example has the following specific steps:

[0065] 1. First, estimate the number of seismic isolation devices 6 required according to the scale of a single elevated silo and its additional vertical load, and arrange them in a symmetrical manner. In the example, 10 seismic isolation devices 6 are arranged in a circular manner; then determine the curvature and center radius of the lower positioning seat plate 9 according to the anchor bolts 7 on the original structure support ring beam 5. In the example, there are 40 anchor bolts 7, the curvature of the lower positioning seat plate 9 is 18°, and the center radius is 3090mm, which is consistent with the anchor bolts 5. The curvature and center radius of the upper positioning seat plate 12 are consistent with those of the lower positioning seat plate 9, and the curvature of the laminated rubber seismic isolation bearing 11 is reduced to 14°, and the center line coincides with the lower positioning seat plate 9.

[0066] Second, the two ends of the lower positioning seat plate 9 are reserved with strip notches 92 and positioning holes 1 91. The positioning holes 1 91 are slightly larger than the outer diameter of the anchor bolts 7 for easy nesting and positioning. The width of the positioning plate 132 of the mild steel damping module 13 is determined according to the gap size between the laminated rubber isolation bearing 11 and the strip notches 92, and a margin of 3 to 5 mm is reserved. In the example, the width of the positioning plate 132 is 50 mm. Bolt holes 133 are reserved in the mild steel damping module 13 for connecting the lower positioning seat plate 9. The upper positioning seat plate 12 is also reserved with positioning holes 2 121 and connecting bolt holes 2 122 that are slightly larger than the outer diameter of the anchor bolts 7.

[0067] 3. After the lower positioning seat plate 9, the seismic isolation support 11, the upper positioning seat plate 12, the mild steel damping module 13 and the hanging plate 14 are manufactured in the factory, the assembly begins. The specific assembly steps are as follows:

[0068] (1) Use an ink line to draw the center line at the groove of the lower positioning seat plate 9 and the connecting plate 10 of the seismic isolation support 11. After the center lines are aligned, the soft steel damping module 13 is embedded into the two sides and connected with the bolt hole 133 with the bolt 2 15 to play a limiting role. After symmetrical alignment, the seismic isolation support 11 is fixedly connected to the lower positioning seat plate 9 by welding or bolting;

[0069] (2) Connect the upper positioning seat plate 12 to the mild steel damping module 13 through the second bolt hole 122 with the second bolt 15, and then fix the upper positioning seat plate 12 to the seismic isolation support 11 by welding or bolting;

[0070] (3) Finally, the lifting plate 14 is connected to the upper positioning seat plate 12 through the reserved bolt holes to complete the assembly work.

[0071] 4. After the seismic isolation device is assembled, it can be transported to the site for installation. The specific installation steps are as follows:

[0072] (1) Disconnect the original steel silo 2 from the supporting ring beam 5 and temporarily lift it using a jacking device;

[0073] (2) Shorten the original anchor bolts 7 to below the thickness of the lower positioning seat plate 9;

[0074] (3) The seismic isolation device 6 is transported to the vicinity of the hole position through the lifting plate 14, and the position of the longitudinal reinforcement of the supporting ring beam 5 is measured and marked using a steel bar scanner. The anchor bolts 7 are inserted through the positioning holes 91 for positioning and installation. Finally, the seismic isolation device 6 and the supporting ring beam 5 are fixed with anchor bolts through the strip grooves 92, and the longitudinal reinforcement positions should be avoided.

[0075] (4) The position of the steel silo 2 is slowly adjusted using a lifting device, and the bolt holes on the annular seat plate 18 are aligned with the second positioning holes 121 of the upper positioning seat plate 12 and then fixedly connected using bolts, thereby completing the seismic retrofitting of the existing elevated silo structure.

[0076] In summary, this assembled self-resetting seismic isolation device suitable for elevated silos solves the problem of adapting the standard laminated rubber seismic isolation device and the installation node of the high-position silo in the prior art by adopting the structural characteristics of the fan-shaped seismic isolation support; through reserved notches, bolt holes, modular connections and other measures, the seismic isolation device can be produced and assembled in the factory, and the seismic isolation device can be quickly positioned and installed on site, which improves the construction and transformation efficiency of the prior art; the mild steel damping module provides bilinear stiffness for the seismic isolation device, and the low-yield point mild steel plate provides the structure with the effect of resisting wind loads and multiple earthquakes. When the horizontal force on the structure exceeds the yield strength of the mild steel plate, the seismic isolation support will play the role of a horizontal flexible layer and work together through a symmetrical arrangement. On the one hand, it can significantly extend the natural vibration period of the silo, reduce the acceleration response, and reduce the seismic effect. On the other hand, the elastic-plastic deformation of the soft steel plate can provide restoring force and reset function for the seismic isolation bearing after shear deformation, ensuring that the elevated silo can resume normal use when a fortification earthquake occurs, and the elevated silo will not collapse when a rare earthquake occurs; in high-intensity fortification areas and earthquake key monitoring and defense areas, the reinforced concrete support frame with traditional design is limited by earthquake-resistant measures, resulting in an overly large cross-sectional size design, further exacerbating the risk of earthquake collapse. After adopting the present invention, engineering construction costs can be saved, and the use of building materials and pollution emissions can be reduced.

Claims

1. An assembled self-resetting seismic isolation device suitable for an elevated silo, characterized in that: The invention comprises a supporting frame column (1), a steel silo (2), a supporting frame beam (3), a supporting cross beam (4), a supporting ring beam (5) and a seismic isolation device (6). The number of the supporting frame columns (1) is four. The supporting frame columns (1) are connected by supporting frame beams (3). The middle of the supporting frame beams (3) are connected by supporting cross beams (4). The inner circle of the supporting cross beam (4) is fixedly connected to the supporting ring beam (5). The top of the supporting ring beam (5) is connected to the steel silo (2) through the seismic isolation device (6). The bottom of the steel silo (2) is provided with a steel silo conical hopper (8); the seismic isolation device (6) comprises an upper positioning seat plate (12) and a lower positioning seat plate (9). , a connecting plate (10), a vibration isolation support (11), a mild steel damping module (13) and a hanging plate (14); an upper positioning seat plate (12), a lower positioning seat plate (9), a connecting plate (10) and a vibration isolation support (11) are all fan-shaped; a groove is provided on the top surface of the lower positioning seat plate (9); a connecting plate (10) is provided on the groove; a vibration isolation support (11) is provided on the connecting plate (10); an upper positioning seat plate (12) is provided on the centerline top surface of the vibration isolation support (11); a hanging plate (14) is installed on the upper positioning seat plate (12); mild steel damping modules (13) are provided on both sides of the vibration isolation support (11); the vibration isolation support (11) is a laminated rubber vibration isolation pad.

2. The assembled self-resetting seismic isolation device suitable for an elevated silo according to claim 1 is characterized in that: The top surface of the upper positioning seat plate (12) is provided with two positioning holes (121), and the top surfaces on both sides of the upper positioning seat plate (12) are respectively provided with two bolt holes (122).

3. The assembled self-resetting seismic isolation device suitable for an elevated silo according to claim 1 or 2, characterized in that: A silo foot (16) is provided at the bottom of the steel silo (2), and the silo foot (16) is fixed on an annular seat plate (18). The annular seat plate (18) is connected to a second positioning hole (121) of an upper positioning seat plate (12) in a seismic isolation device (6) via a first bolt (17).

4. The assembled self-resetting seismic isolation device suitable for an elevated silo according to claim 1 is characterized in that: A positioning hole (91) is provided in the groove provided on the top surface of the lower positioning seat plate (9), and the positioning hole (91) is connected to the support ring beam (5) through anchor bolts (7); strip-shaped notches (92) are provided on the top surfaces of both sides of the lower positioning plate (9), and the strip-shaped notches (92) are connected to the support ring beam (5) by anchor bolts.

5. The assembled self-resetting seismic isolation device suitable for an elevated silo according to claim 1 or 2, characterized in that: The soft steel damping module (13) comprises a soft steel sheet (131), a positioning plate (132) and a bolt hole (133). A positioning plate (132) is installed on the upper and lower parts of the soft steel sheet (11). The positioning plates (132) are respectively provided with a bolt hole (133). The bolt holes (133) of the upper and lower positioning plates (132) are respectively connected to the positioning holes (121) of the upper positioning seat plate (12) and the lower positioning seat plate (9) through bolts (15). The soft steel sheet (131) is one of the energy-absorbing core materials selected from LY100, LY160 and LY225.

6. The assembled self-resetting seismic isolation device suitable for an elevated silo according to claim 1, characterized in that: The lower positioning seat plate (9) is concentrically matched with the seismic isolation support (11) and the upper positioning seat plate (12), and the inner diameter direction is consistent with the supporting ring beam (5).

7. The assembled self-resetting seismic isolation device suitable for an elevated silo according to claim 1, characterized in that: The number of the seismic isolation devices (6) is several, and the number of installations is determined by calculation according to the load size of the supported steel silo (2). The ring silo is installed in accordance with the principle of uniformity and symmetry.

8. A construction method for an assembled self-resetting seismic isolation device suitable for an elevated silo according to claim 1, characterized in that: The specific steps are as follows:

1. First, the number of seismic isolation devices (6) required is estimated according to the size of a single steel silo (2) and its additional vertical load, and the seismic isolation devices (6) are arranged in a symmetrical manner and arranged in a circular direction; then, the curvature and center radius of the lower positioning seat plate (9) are determined according to the anchor bolts (7) on the original structure support ring beam (5), the upper positioning seat plate (12) is concentrically aligned with the lower positioning seat plate (9), and the center line of the seismic isolation support (11) coincides with the lower positioning seat plate (9); Second, a strip-shaped notch (92) and a positioning hole (91) are reserved at both ends of the lower positioning seat plate (9), and the positioning hole (91) is larger than the outer diameter of the anchor bolt (7) to facilitate nesting and positioning; the width of the positioning plate (132) of the soft steel damping module (13) is determined according to the gap size between the seismic isolation support (11) and the strip-shaped notch (92), and a margin of 3 to 5 mm is reserved; a bolt hole (133) is reserved in the soft steel damping module (13) for connecting the lower positioning seat plate (9); a positioning hole (121) larger than the outer diameter of the anchor bolt (7) and a bolt hole (122) for connecting the positioning plate (132) are also reserved in the upper positioning seat plate (12); 3. In the factory, the lower positioning seat plate (9), the seismic isolation support (11), the upper positioning seat plate (12), the mild steel damping module (13) and the hanging plate (14) are respectively manufactured and assembled to form the seismic isolation device (6); 4. After the seismic isolation device (6) is assembled, it can be transported to the site for installation.

9. The construction method of the assembled self-resetting seismic isolation device suitable for an elevated silo according to claim 8 is characterized in that: In the step 3, the specific assembly steps are as follows: 1) Use an ink line to pop out the center line at the groove of the lower positioning seat plate (9) and the connecting plate (10) of the seismic isolation support (11). After the center lines are aligned, the soft steel damping module (13) is embedded into both sides, and the bolt hole (133) is connected with the bolt second (15) to play a limiting role. After symmetrical alignment, the seismic isolation support (11) is fixedly connected to the lower positioning seat plate (9) by welding or bolting; 2) The upper positioning seat plate (12) is connected to the mild steel damping module (13) at the hole position by means of bolts (15) through bolt holes (122), and then the upper positioning seat plate (12) is fixedly connected to the seismic isolation support (11) by welding or bolting; 3) Finally, the hanging plate (14) is connected to the upper positioning seat plate (12) through the reserved bolt holes to complete the assembly work.

10. The construction method of the assembled self-resetting seismic isolation device suitable for an elevated silo according to claim 8, characterized in that: In the step 4, the specific assembly steps are as follows: 1) disconnect the original steel silo (2) from the supporting ring beam (5) and temporarily lift it using a jacking device; 2) shorten the original anchor bolts (7) to a thickness below the thickness of the lower positioning seat plate (9); 3) The seismic isolation device (6) is transported to the vicinity of the hole position through the lifting plate (14), and the position of the longitudinal reinforcement of the supporting ring beam (5) is measured and marked using a steel bar scanner, and the anchor bolt (7) is inserted through the positioning hole (91) for positioning and installation, and finally the seismic isolation device (6) and the supporting ring beam (5) are fixed with anchor bolts through the strip groove (92), avoiding the position of the longitudinal reinforcement of the supporting ring beam (5); 4) The position of the steel silo (2) is slowly adjusted using a lifting device, and the bolt holes on the annular base plate (18) are aligned with the second bolt holes (121) of the upper positioning base plate (12) and then fixedly connected using bolts (17), thereby completing the seismic retrofitting of the existing elevated silo structure.

Images