CN114412259B - Graded energy dissipation self-resetting assembled pier column - Google Patents
Graded energy dissipation self-resetting assembled pier column Download PDFInfo
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- CN114412259B CN114412259B CN202111182190.XA CN202111182190A CN114412259B CN 114412259 B CN114412259 B CN 114412259B CN 202111182190 A CN202111182190 A CN 202111182190A CN 114412259 B CN114412259 B CN 114412259B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Abstract
The invention relates to the technical field of structural engineering, and provides a graded energy dissipation self-resetting assembled pier stud, which comprises a spherical part arranged at the bottom end of a stud body; the base is provided with an arc groove for accommodating the spherical part, and a first friction pad is arranged between the arc groove and the spherical part; the energy dissipation mechanism is arranged on two sides of the column body respectively and mainly comprises a first connecting plate, a second connecting plate, a cover plate, a first fastening piece, a second fastening piece and a second friction pad piece. According to the invention, the first friction pad and the energy dissipation mechanism are arranged, so that when the pier column structure encounters disasters of different types and different levels, graded energy dissipation can be provided according to the deformation state of the structure, and the assembly has the characteristic of quick assembly, disassembly and repair after earthquake, and high-performance assembly is realized.
Description
Technical Field
The invention relates to the technical field of structural engineering, in particular to a hierarchical energy dissipation self-resetting assembled pier stud.
Background
Currently, while there have been many efforts to build pier stud structures, these pier stud structures consume seismic energy through dampers and provide elastic restoring forces through pre-stressed rebar. But the energy consumption mechanism effect of a single damper is not obvious, the graded energy dissipation cannot be realized when the pier stud encounters disasters of different types and different levels, and structural damage components cannot be replaced to quickly repair under the action of large earthquake or super-large earthquake.
Therefore, there is a need for a hierarchical energy dissipation self-resetting fabricated pier stud structure that can achieve hierarchical energy dissipation and rapid repair.
Disclosure of Invention
The invention provides a grading energy dissipation self-resetting assembled pier stud, which can provide grading energy dissipation according to the structural deformation state when the pier stud structure encounters disasters of different types and different grades, has the characteristic of quick assembly, disassembly and repair after earthquake, and realizes high-performance assembly.
The invention provides a grading energy dissipation self-resetting assembled pier stud, which comprises: the bottom end of the column body is provided with a spherical part; the base is provided with an arc groove for accommodating the spherical part, and a first friction pad is arranged between the arc groove and the spherical part; the energy dissipation mechanism is symmetrically arranged on two sides of the column body respectively and comprises a first connecting plate, a second connecting plate, a cover plate, a first fastening piece and a second fastening piece, wherein the upper portion of the first connecting plate is connected with the outer wall of the column body through a first connecting member, the gap of the second connecting plate is arranged right below the first connecting plate, the lower portion of the second connecting plate is fixed on the base, the lower portion of the first connecting plate and the upper portion of the second connecting plate are clamped between the two cover plates, a second friction pad piece is arranged between the cover plate and the first connecting plate and extends between the cover plate and the second connecting plate, a plurality of vertically distributed first long slot holes and second long slot holes are formed in the cover plate, the first fastening piece penetrates through the second friction pad piece and the first connecting plate to be fastened and connected through the first long slot holes, and the second fastening piece penetrates through the second friction pad piece and the second connecting plate to be fastened and connected through the second long slot holes.
According to the invention, the column body comprises an upper section column body and a lower section column body which are detachably connected.
According to the hierarchical energy dissipation self-resetting assembled pier column provided by the invention, the upper segment column body is connected with the lower segment column body through the second connecting component, the second connecting component comprises a first embedded part, a second embedded part and a third fastening piece, the first embedded part is embedded at the bottom of the upper segment column body and extends to the outer part of the upper segment column body to form a first connecting part, the second embedded part is embedded at the top of the lower segment column body and extends to the outer part of the lower segment column body to form a second connecting part, and the third fastening piece penetrates through the first connecting part and the second connecting part to be fastened and connected.
The invention provides a grading energy dissipation self-resetting assembly pier stud, which further comprises a self-resetting mechanism, wherein the self-resetting mechanism comprises: the non-binding prestressed reinforcement is vertically arranged in the central pore canal of the lower section cylinder, the upper end of the non-binding prestressed reinforcement is connected with the second embedded part through the first anchor, and the lower end of the non-binding prestressed reinforcement is connected to the bottom of the base through the second anchor.
According to the graded energy dissipation self-resetting assembled pier stud provided by the invention, the bottom of the upper section column body is provided with the first accommodating cavity for accommodating the first anchor, the first embedded part is provided with the mounting hole for mounting the first anchor, and the bottom of the base is provided with the second accommodating cavity for accommodating the second anchor.
According to the hierarchical energy dissipation self-resetting assembled pier stud provided by the invention, the first connecting component comprises a third embedded part, a third connecting plate and a connecting piece, wherein the third embedded part is embedded on the inner wall of the lower section cylinder and extends to the outer part of the lower section cylinder to form a plurality of third connecting parts, the third connecting parts are connected with the first end of the third connecting plate through fourth fasteners, and the second end of the third connecting plate is connected with the upper part of the first connecting plate through the connecting piece.
According to the hierarchical energy dissipation self-resetting assembled pier stud provided by the invention, the assembled pier stud further comprises a bearing platform, the base is connected to the bearing platform through a third connecting component, the third connecting component comprises a fourth embedded part, the fourth embedded part is embedded in the bearing platform, the fourth embedded part is connected with a plurality of fifth fasteners, and the fifth fasteners extend to the upper side of the bearing platform and are connected with the base.
According to the grading energy dissipation self-resetting assembled pier stud provided by the invention, the middle part of the bearing platform is provided with the groove, the base is arranged in the groove, the top of the base is provided with the outer edge part, and the outer edge part is arranged on the bearing platform and is connected through the fifth fastening piece.
According to the hierarchical energy dissipation self-resetting assembled pier stud provided by the invention, the lower part of the second connecting plate is fixed in the connecting lug seat through a plurality of sixth fasteners, and the connecting lug seat is fixed on the base through the fifth fasteners.
According to the graded energy dissipation self-resetting assembled pier stud provided by the invention, a plurality of stiffening ribs are respectively arranged on two sides of the connecting lug seat, and the stiffening ribs are positioned between two adjacent sixth fasteners.
According to the graded energy dissipation self-resetting assembled pier stud, the first friction pad and the energy dissipation mechanism are arranged, so that when the pier stud structure encounters disasters of different types and different grades, graded energy dissipation can be provided according to the structural deformation state, and the assembled pier stud has the characteristic of quick assembly, disassembly and repair after earthquake, and high-performance assembly is realized.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of a hierarchical energy dissipation self-resetting fabricated pier stud provided by the invention;
FIG. 2 is a cross-sectional view taken along the A-A plane of FIG. 1;
FIG. 3 is a cross-sectional view taken along the B-B plane of FIG. 1;
FIG. 4 is a cross-sectional view taken along the C-C plane of FIG. 3;
FIG. 5 is a D-D side cross-sectional view of FIG. 1;
FIG. 6 is a schematic diagram of a structure of an energy dissipating mechanism provided by the present invention;
FIG. 7 is a side view of the energy dissipating mechanism provided by the present invention;
reference numerals:
1. an upper segment column; 101. a first accommodation chamber; 2. a lower segment column; 201. a spherical portion; 3. a base; 301. a second accommodation chamber; 302. an outer edge portion; 4. a first friction pad; 5. an energy dissipation mechanism; 501. a first connection plate; 502. a second connecting plate; 503. a cover plate; 504. a first fastener; 505. a second fastener; 506. a second friction pad; 507. a first slot; 508. a second slot; 6. a first connecting member; 601. the third embedded part; 602. a third connecting plate; 603. a connecting piece; 604. a third connecting portion; 605. a fourth fastener; 606. a first shear bolt; 7. a second connecting member; 701. the first embedded part; 702. the second embedded part; 703. a third fastener; 704. a first connection portion; 705. a second connecting portion; 706. a second shear bolt; 801. unbonded prestressed tendons; 802. a first anchor; 803. a second anchor; 804. a central aperture; 9. bearing platform; 10. a third connecting member; 1001. a fourth embedded part; 1002. a fifth fastener; 1003. a third shear bolt; 11. a sixth fastener; 12. the connecting ear seat; 13. stiffening ribs.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "vertical", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," second, "" third, "" fourth, "" fifth, "and sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.
In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
According to an embodiment of the present invention, referring to fig. 1, 4 and 5, the hierarchical energy dissipation self-resetting fabricated pier stud provided by the present invention mainly includes: the column body, the base 3 and the energy dissipation mechanism 5. Wherein, the bottom end of the column body is provided with a spherical part 201; the base 3 is provided with an arc groove for accommodating the spherical part 201, the arc groove is matched with the radian of the spherical part 201, so that the spherical part 201 can be completely embedded into the arc groove, and a first friction pad 4 is arranged between the arc groove and the spherical part 201. It should be appreciated that when the spherical portion 201 and the arc groove are rotated relatively under the action of an earthquake, and the constraint between the contact surfaces of the spherical portion 201 and the arc groove is relaxed by filling the first friction pad 4 therebetween, small slippage and rotation are generated, and compared with the conventional pier stud structure, the stress concentration phenomenon is reduced and the contact surfaces of the spherical portion and the arc groove are protected by the arrangement. The specific type of the first friction pad 4 is not particularly limited, and in this example, the first friction pad 4 is a rubber pad.
Referring to fig. 1, 6 and 7, the energy dissipating mechanisms 5 are symmetrically disposed at left and right sides of the column, respectively, and each energy dissipating mechanism 5 includes a first connection plate 501, a second connection plate 502, a cover plate 503, a first fastening member 504 and a second fastening member 505. Wherein, the upper portion of first connecting plate 501 links to each other with the lower part outer wall of cylinder through first connecting member 6, and second connecting plate 502 has the clearance to set up under first connecting plate 501, and specifically, second connecting plate 502 flushes the setting in vertical direction with first connecting plate 501, is convenient for install left and right sides apron 503, and the lower part of second connecting plate 502 is fixed in on the base 3.
And, the lower part of the first connecting plate 501 and the upper part of the second connecting plate 502 are clamped between the two cover plates 503, and a second friction pad 506 is respectively arranged between each side cover plate 503 and the first connecting plate 501, and the second friction pad 506 extends between the cover plate 503 and the second connecting plate 502. It can also be understood that: the invention is provided with two second friction pad pieces 506, the two second friction pad pieces 506 are respectively arranged on the inner sides of the two cover plates 503, the upper part of each second friction pad piece 506 is positioned between the cover plate 503 and the first connecting plate 501, and the lower part of each second friction pad piece 506 is positioned between the cover plate 503 and the second connecting plate 502.
The cover plate 503 is provided with a plurality of first long slot holes 507 and second long slot holes 508 which are vertically distributed so as to enable the energy consumption to be more sufficient; the first long slot holes 507 are positioned at the upper part of the cover plates 503, a first fastening piece 504 is arranged in each first long slot hole 507, and the first fastening piece 504 penetrates through the upper part of the second friction pad 506 and the lower part of the first connecting plate 501 through the first long slot holes 507 to be connected, so that the fastening of the two cover plates 503 and the first connecting plate 501 is realized; the second long slot holes 508 are positioned at the lower part of the cover plates 503, a second fastening piece 505 is arranged in each second long slot hole 508, and the second fastening piece 505 penetrates through the lower part of the second friction pad 506 and the upper part of the second connecting plate 502 through the second long slot holes 508 to be connected, so that the fastening of the two cover plates 503 and the second connecting plate 502 is realized.
The first connecting plate 501, the second connecting plate 502 and the cover plate 503 are all made of steel materials, and the specific number, type and arrangement mode of the first fastening pieces 504 and the second fastening pieces 505 can be adjusted according to specific working conditions, so long as the fastening effect can be achieved. In this example, the first fastening member 504 and the second fastening member 505 are respectively arranged in a row of three rows, the first long slot 507 and the second long slot 508 are correspondingly arranged, and the first fastening member 504 and the second fastening member 505 are fastening bolts, and the lengths of the first long slot 507 and the second long slot 508 are slightly larger than the width of the fastening bolts.
Further, the lower end edge of the first connecting plate 501 and the upper end edge of the second connecting plate 502 are respectively provided with a chamfer so as to reduce the contact area between the two in the process of fortifying the intensity earthquake, facilitate rotation and improve the energy dissipation effect.
According to the embodiment of the invention, the first friction pad 4 and the energy dissipation mechanism 5 are arranged, so that when the pier column structure encounters disasters of different types and different levels, the earthquake energy of different levels can be consumed in a grading manner according to the structural deformation state, and the earthquake energy storage device has the characteristic of quick assembly, disassembly and repair after earthquake, and high-performance assembly is realized.
According to the embodiment of the invention, the column body comprises the upper section column body 1 and the lower section column body 2 which are detachably connected, and the pier column is divided into the upper part and the lower part, so that the replacement of part of the column body after earthquake is convenient, the whole replacement is not needed, and the cost is saved and the repairing is fast. The upper section column 1 and the lower section column 2 of the pier column are prefabricated by a reinforced concrete factory, and the embodiment of the invention adopts square pier columns, but it is to be understood that the invention can be applied to pier column structures with different shapes.
In one embodiment, as shown in fig. 1, 2 and 4, the upper section cylinder 1 is detachably connected with the lower section cylinder 2 by a second connecting member 7, the second connecting member 7 mainly comprising a first embedment 701, a second embedment 702 and a third fastener 703. The first embedded part 701 is embedded at the bottom of the upper segment column 1 and extends to the outside of the upper segment column 1 to construct a first connecting portion 704, the second embedded part 702 is embedded at the top of the lower segment column 2 and extends to the outside of the lower segment column 2 to construct a second connecting portion 705, and the third fastening member 703 penetrates through the first connecting portion 704 and the second connecting portion 705 to be fastened and connected, so that the upper segment column 1 and the lower segment column 2 are assembled. Specifically, the first embedded part 701 and the second embedded part 702 are both made of steel plates, the third fastening member 703 is a high-strength bolt, and the high-strength bolts are respectively arranged around the first connection portion 704 and the second connection portion 705 in a 2×3 arrangement manner, so as to improve the fastening performance; and a plurality of second shear bolts 706 are respectively embedded on the first embedded part 701 and the second embedded part 702, and the second shear bolts 706 are arranged around the first embedded part 701 and the second embedded part 702 in a 3×3 arrangement manner so as to respectively enhance the tightness of the first embedded part 701 and the upper section column 1 and the second embedded part 702 and the lower section column 2. In addition, according to the stress requirements of specific working conditions in the pier column upper section column 1 and the pier column lower section column 2, a certain number of longitudinal bars and stirrups are matched according to the reinforcement ratio, so that the overall strength of the pier column is improved.
According to an embodiment of the present invention, as shown in fig. 4, the hierarchical energy dissipation self-resetting fabricated pier column of the present invention further includes a self-resetting mechanism, which mainly includes: unbonded tendon 801, first anchor 802, and second anchor 803. The unbonded tendon 801 is vertically disposed in a central hole 804 of the lower section cylinder 2, and an upper end of the unbonded tendon 801 is connected with the second embedded part 702 through a first anchor 802, and a lower end of the unbonded tendon 801 is connected with a bottom of the base 3 through a second anchor 803. The invention can provide an elastic restoring force through the unbonded prestressed tendons 801 during an earthquake, thereby reducing the damage of the earthquake to the structure. Compared with the prior art, most of assembly type pier stud structures adopt longer unbonded prestressed tendons and are mostly anchored between the top end of the pier stud and the bottom of a bearing platform, the pier stud can only be replaced integrally after strong vibration, and the unbonded prestressed tendons are loaded and unloaded in a complicated mode, so that huge repair cost is caused. According to the invention, the unbonded tendon 801 is connected to the lower section column 2 and is arranged in the central pore canal 804, namely, the unbonded tendon 801 is added to the position where the earthquake action at the lower part of the column is concentrated, so that self-resetting is easier, only part of the column is required to be replaced after earthquake, and meanwhile, the length of the unbonded tendon 801 is shortened, and the unbonded tendon 801 can be quickly replaced. Therefore, the invention saves materials and cost and is convenient to assemble and disassemble through the arrangement.
Moreover, the bottom of the upper segment column 1 is provided with a first accommodating cavity 101 for accommodating the first anchor 802, the first embedded part 701 is provided with a mounting hole for mounting the first anchor 802, the bottom of the base 3 is provided with a second accommodating cavity 301 for accommodating the second anchor 803, and the assembly of the first anchor 802 and the second anchor 803 can be facilitated through the arrangement.
According to the embodiment of the present invention, referring to fig. 1 and 3 to 7, the first connection members 6 positioned at the left and right sides of the pier stud mainly include the third embedded part 601, the third connection plate 602 and the connection part 603. The third embedded part 601 is embedded on the inner wall of the lower segment cylinder 2 and extends to the outside of the lower segment cylinder 2, a plurality of third connecting parts 604 are constructed, the third connecting parts 604 on the left side and the right side are respectively two pairs of connecting lugs, the third connecting plates 602 are transversely arranged, the first ends of the third connecting plates 602 extend into each pair of connecting lugs and are connected through fourth fasteners 605, and the second ends of the third connecting plates 602 are connected with the upper parts of the first connecting plates 501 of the energy dissipation mechanisms 5 through connecting parts 603. Specifically, the third embedded part 601 and the third connecting plate 602 are made of steel plates, the connecting part 603 is made of angle steel, the third connecting plate 602 is connected with the first connecting plate 501 of the energy dissipation mechanism 5 by using right angle steel, and two adjacent third connecting plates 602 on the same side are connected by using concave angle steel, so that the connection stability of the third connecting plate 602 is improved. In addition, the third embedded part 601 is embedded on one surface of the lower section cylinder 2 and provided with first shear bolts 606 arranged in a 4×6 manner, so as to improve the tightness between the third embedded part 601 and the lower section cylinder 2. The present invention transmits seismic energy to the energy dissipating mechanism 5 through the first connecting member 6.
According to the embodiment of the invention, as shown in fig. 1 and 4, the hierarchical energy dissipation self-resetting assembled pier column further comprises a bearing platform 9, the base 3 is connected to the bearing platform 9 through a third connecting member 10, the third connecting member 10 is distributed below the energy dissipation mechanism 5 left and right, the third connecting member 10 comprises a fourth embedded part 1001, the fourth embedded part 1001 is embedded at the upper position in the bearing platform 9, the top of the fourth embedded part 1001 is connected with a plurality of fifth fastening parts 1002, the fifth fastening parts 1002 extend to the upper part of the bearing platform 9 and are connected with the base 3, and a plurality of third shear bolts 1003 are embedded at the bottom of the fourth embedded part 1001 so as to enhance the tightness between the fourth embedded part 1001 and the bearing platform 9. In this example, the fourth embedment 1001 employs a steel plate, and the fifth fastener 1002 is a fastening bolt.
Specifically, the middle part of cushion cap 9 is equipped with the recess, and base 3 sets up in the recess, and the top of base 3 is equipped with outer fringe portion 302, and outer fringe portion 302 is set up on cushion cap 9, and fifth fastener 1002 runs through outer fringe portion 302 and passes through the nut fastening.
According to the embodiment of the invention, as shown in fig. 6 and 7, the lower portion of the second connecting plate 502 is disposed in the connecting ear seat 12, the left and right sides of the connecting ear seat 12 are provided with a plurality of sixth fastening members 11, the sixth fastening members 11 are fastening bolts for fixing the second connecting plate 502 in the connecting ear seat 12, and the fifth fastening members 1002 penetrate through the outer edge portion 302 of the base 3 and the bottom portion of the connecting ear seat 12, and fix the connecting ear seat 12 on the base 3 through nuts.
And, the both sides of connecting ear seat 12 are equipped with a plurality of stiffening ribs 13 respectively, and stiffening rib 13 is located between two adjacent sixth fastener 11, separates sixth fastener 11 to improve the stability and the torsional properties of connecting ear seat 12.
Based on the above embodiments, the construction method of the pier stud structure of the present invention mainly includes the following aspects.
(1) The bearing platform 9 adopts a cast-in-situ construction mode, but the third connecting member 10 is pre-buried according to a certain size requirement when the cast-in-situ is about to be formed, a mold is used for guaranteeing the placement position of the base 3, the fourth embedded part 1001 is guaranteed not to deviate when the fourth embedded part is formed, and the fifth fastening member 1002 and the base 3 are smoothly spliced.
(2) The base 3 is prefabricated in a factory, the arc groove of the base 3 is prefabricated according to the design size, the arc groove is well contacted with the spherical part 201 at the bottom end of the lower segment cylinder 2 during splicing, the second anchorage 803 is placed in the second accommodation cavity 301 which is reserved at the bottom of the base 3 and concave according to the second anchorage 803, corresponding holes are prefabricated on the outer edge part 302 of the base 3 according to the positions and the number of the fifth fasteners 1002, and in addition, the connecting lug base 12 is arranged on the base 3.
(3) The upper segment column 1 is prefabricated in a factory, a first embedded part 701 is required to be arranged at the joint of the bottom of the upper segment column 1 during prefabrication, a mounting hole is reserved in the middle of the first embedded part 701 according to the size of the first anchor 802 to place the first anchor 802, and a concave first accommodating cavity 101 is reserved at the bottom of the upper segment column 1 according to the size of the first anchor 802 to place the first anchor 802, so that assembly on a construction site is smoothly carried out.
(4) The lower segment cylinder 2 is prefabricated by a factory, a central pore canal 804 for installing an unbonded prestress rib 801 is reserved, a first connecting member 6 is embedded in a preset position, a second embedded part 702 is arranged at a position opposite to the first embedded part 701, the bottom end of the lower segment cylinder 2 is poured into a spherical part 201 through a hemispherical die according to a design size, and the spherical part 201, a first friction pad 4, a base 3 and a bearing platform 9 are ensured to be in good contact with each other in the manufacturing and assembling process; meanwhile, the connection of the assembly components is guaranteed to be in bolt dry connection, wet connection operation is not needed, and the assembly and the disassembly are convenient and quick.
Therefore, the whole graded energy dissipation self-resetting assembled pier stud is divided into four sections from top to bottom, so that the whole graded energy dissipation self-resetting assembled pier stud can be prefabricated in advance in a factory, can be assembled and assembled quickly when reaching a construction site, can be replaced in time when a vibration damage component appears when a rare earthquake occurs, and can quickly restore the energy dissipation bearing function of the structure, thereby solving the problems of difficult maintenance and large engineering quantity.
The invention further describes the working principle of the hierarchical energy dissipation self-resetting assembled pier column, and the hierarchical energy dissipation self-resetting assembled pier column can provide multi-level rigidity, bearing capacity and deformability according to the structural deformation state when encountering disasters of different types and different levels. Specifically, the hierarchical energy dissipation self-resetting assembled pier stud structure can sequentially enter the following four working stages, so that hierarchical energy dissipation is achieved.
(1) Elastic stage
Under the normal running process of the vehicle or the wind load effect, the bending moment generated by relative angular displacement of the base 3 and the lower segment cylinder 2 is smaller than the resisting bending moment provided by the maximum static friction force of the first friction pad piece 4, the self rigidity of the unbonded prestress rib 801, the maximum static friction force of the second friction pad piece 506 and the maximum static friction force of the first fastening piece 504 and the second fastening piece 505, the lower segment cylinder 2 and the base 3 cannot rotate relatively, all the component members are in an elastic and damage-free stage, and the structural rigidity and the bearing capacity are provided by the unbonded prestress rib 801, the first friction pad piece 4 and the second friction pad piece 506.
(2) Friction energy consumption stage
Under the action of earthquake, the bending moment generated by the relative angular displacement of the base 3 and the lower segment cylinder 2 reaches the resistance bending moment provided by the sliding friction force of the first friction pad 4, the self rigidity of the unbonded prestress rib 801, the sliding friction force of the second friction pad 506 and the sliding friction force provided by the first fastening piece 504 and the second fastening piece 505 in a combined way, the lower segment cylinder 2 starts to rotate relative to the base 3, the first connecting plate 501 and the cover plate 503 in the energy dissipation mechanism 5 start to relatively shear up and down, during the period, earthquake energy is consumed by the friction of the first friction pad 4, the friction of the first fastening piece 504 and the second fastening piece 505 on the upper and lower sides of the long slot holes, the sliding friction of the second friction pad 506 and the first connecting plate 501, the second connecting plate 502 and the cover plate 503, and the elastic restoring force is provided by the unbonded prestress rib 801 in the self-restoring mechanism to lighten the structural earthquake response, and the structural bearing force is provided by the sliding friction force of the first friction pad 4, the second friction pad 506, the first fastening piece 504 and the second fastening piece 505 and the elastic restoring force 801 in a combined way.
It will be appreciated that the elastic phase and the friction energy dissipation phase described above of the present invention, all of which are in an elastic, atraumatic state.
(3) Yield energy dissipation stage
Under the action of the earthquake with intensity of fortification, relative rotation angles of the base 3 and the lower segment column 2 are required to be further increased, the first connecting plate 501 of the energy dissipation mechanism 5 moves downwards to be in contact with the second connecting plate 502, steel yield phenomenon occurs to the first connecting plate 501 under the action of transverse pressure, the first connecting plate 501 yields to enable the cover plate 503 at one turning side to enter a limiting state, and the response of the structure under the action of the earthquake with large intensity can be controlled. The rigidity of the energy dissipation mechanism 5 is provided by the transverse rigidity of the cover plate 503, the energy dissipation capacity of the structure is provided by the first friction pad 4, the second friction pad 506, the first connecting plate 501, the second connecting plate 502 and the cover plate 503, meanwhile, the unbonded prestress rib 801 in the self-resetting mechanism provides elastic restoring force to relieve the earthquake response of the structure, and the bearing capacity of the structure is provided by the first friction pad 4, the first connecting plate 501, the second friction pad 506, the cover plate 503 and the unbonded prestress rib 801. In this stage, the other parts except the first connecting plate 501 and the second connecting plate 502 are still in an elastic nondestructive state, and after an earthquake, the first connecting plate 501 and the second connecting plate 502 can be replaced to realize quick repair of the structure.
(4) Hysteresis energy consumption stage
Under rare earthquakes, the relative rotation angle of the base 3 and the lower segment cylinder 2 is further increased, the first connecting plate 501 yields, so that the steel yield phenomenon also occurs to the turning side cover plate 503 under the action of transverse pressure, and the rigidity of the energy dissipation mechanism 5 is reduced and is provided by the transverse rigidity after the cover plate 503 yields. Because the cover plate 503 has excellent hysteresis energy dissipation characteristics after yielding, the construction energy dissipation capacity is provided by the first friction pad 4, the first connecting plate 501, the second connecting plate 502, the second friction pad 506 and the cover plate 503 together, meanwhile, the unbonded prestressed ribs 801 in the self-resetting mechanism provide elastic restoring force to relieve the structural seismic response, and the bearing capacity is provided by the first friction pad 4, the first connecting plate 501, the second connecting plate 502, the second friction pad 506, the cover plate 503 and the unbonded prestressed ribs 801 together. At this stage, the other parts except the first connecting plate 501, the second connecting plate 502 and the cover plate 503 are still in an elastic and nondestructive state, and the first connecting plate 501, the second connecting plate 502 and the cover plate 503 can be replaced after an earthquake to realize rapid repair of the structure.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a hierarchical energy dissipation self-resetting fabricated pier stud which characterized in that includes:
the bottom end of the column body is provided with a spherical part;
the base is provided with an arc groove for accommodating the spherical part, and a first friction pad is arranged between the arc groove and the spherical part;
the energy dissipation mechanism is symmetrically arranged on two sides of the column body respectively and comprises a first connecting plate, a second connecting plate, a cover plate, a first fastening piece and a second fastening piece, wherein the upper portion of the first connecting plate is connected with the outer wall of the column body through a first connecting member, the gap of the second connecting plate is arranged right below the first connecting plate, the lower portion of the second connecting plate is fixed on the base, the lower portion of the first connecting plate and the upper portion of the second connecting plate are clamped between the two cover plates, a second friction pad piece is arranged between the cover plate and the first connecting plate and extends between the cover plate and the second connecting plate, a plurality of vertically distributed first long slot holes and second long slot holes are formed in the cover plate, the first fastening piece penetrates through the second friction pad piece and the first connecting plate to be fastened and connected through the first long slot holes, and the second fastening piece penetrates through the second friction pad piece and the second connecting plate to be fastened and connected through the second long slot holes.
2. The hierarchical energy dissipating self-resetting fabricated pier column of claim 1, wherein the column comprises removably connected upper and lower section columns.
3. The hierarchical energy dissipation self-resetting fabricated pier column of claim 2, wherein the upper segment column is connected with the lower segment column through a second connecting member, the second connecting member comprises a first embedded part, a second embedded part and a third fastening piece, the first embedded part is embedded at the bottom of the upper segment column and extends to the outer part of the upper segment column to form a first connecting part, the second embedded part is embedded at the top of the lower segment column and extends to the outer part of the lower segment column to form a second connecting part, and the third fastening piece penetrates through the first connecting part and the second connecting part to be fastened and connected.
4. The hierarchical energy dissipating self-healing fabricated pier of claim 3, further comprising a self-healing mechanism comprising: the non-binding prestressed reinforcement is vertically arranged in the central pore canal of the lower section cylinder, the upper end of the non-binding prestressed reinforcement is connected with the second embedded part through the first anchor, and the lower end of the non-binding prestressed reinforcement is connected to the bottom of the base through the second anchor.
5. The hierarchical energy dissipation self-resetting fabricated pier column of claim 4, wherein the bottom of the upper section column is provided with a first accommodating cavity for accommodating the first anchor, the first embedded part is provided with a mounting hole for mounting the first anchor, and the bottom of the base is provided with a second accommodating cavity for accommodating the second anchor.
6. The hierarchical energy dissipation self-resetting fabricated pier column according to claim 2, wherein the first connecting member comprises a third embedded part, a third connecting plate and a connecting piece, the third embedded part is embedded on the inner wall of the lower segment column body and extends to the outer part of the lower segment column body, a plurality of third connecting parts are constructed, the third connecting parts are connected with the first end of the third connecting plate through fourth fasteners, and the second end of the third connecting plate is connected with the upper part of the first connecting plate through the connecting piece.
7. The hierarchical energy dissipation self-resetting fabricated pier column of any one of claims 1-6, further comprising a cap, wherein the base is connected to the cap via a third connecting member, wherein the third connecting member comprises a fourth embedment, wherein the fourth embedment is embedded in the cap, wherein the fourth embedment is connected with a plurality of fifth fasteners, and wherein the fifth fasteners extend above the cap and connect to the base.
8. The hierarchical energy dissipation self-resetting fabricated pier column of claim 7, wherein a groove is formed in the middle of the bearing platform, the base is arranged in the groove, an outer edge portion is arranged at the top of the base, and the outer edge portion is arranged on the bearing platform and connected through the fifth fastener.
9. The hierarchical energy dissipating self-resetting fabricated pier stud of claim 7, wherein the lower portion of the second connection plate is secured within a connection lug by a number of sixth fasteners, the connection lug being secured to the base by the fifth fasteners.
10. The hierarchical energy dissipation self-resetting fabricated pier column according to claim 9, wherein a plurality of stiffening ribs are respectively arranged on two sides of the connecting lug seat, and the stiffening ribs are located between two adjacent sixth fasteners.
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