CN210798069U - Concrete column base node containing high-ductility replaceable energy-consumption connecting assembly - Google Patents
Concrete column base node containing high-ductility replaceable energy-consumption connecting assembly Download PDFInfo
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- CN210798069U CN210798069U CN201921201163.0U CN201921201163U CN210798069U CN 210798069 U CN210798069 U CN 210798069U CN 201921201163 U CN201921201163 U CN 201921201163U CN 210798069 U CN210798069 U CN 210798069U
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Abstract
The utility model discloses a concrete column foot node that contains removable power consumption coupling assembling of high ductility, concrete column foot node sets up in concrete structure rectangular cross section column bottom, including concrete column, the removable power consumption coupling assembling of high ductility and concrete foundation, the removable power consumption coupling assembling of high ductility passes through the welding with pre-buried steel connecting block in concrete column and the concrete foundation respectively and constitutes a continuous reliable biography power system. The bottom of the concrete column of the utility model is provided with a column bottom strengthening core column which can bear the column bottom pressure under the action of earthquake and can not be damaged; the high-ductility replaceable energy-consumption connecting assembly is arranged on four side surfaces of a column base node to replace a stressed longitudinal rib at the original position, and can dissipate seismic energy by using the hysteresis performance of the high-ductility replaceable energy-consumption connecting assembly and control the damage inside the high-ductility replaceable energy-consumption connecting assembly during a medium earthquake or a large earthquake.
Description
Technical Field
The utility model relates to a civil engineering field, concretely relates to concrete column foot node that contains removable power consumption coupling assembling of high ductility.
Background
(1) Toe damage under seismic action
Under the action of earthquake, the reinforced concrete column or the bridge pier column is subjected to reciprocating horizontal load while bearing vertical load, and when the bending resistance, the shearing resistance or the ductility is insufficient, the column can be cracked or damaged. The column foot part is under the combined action of larger pressure and bending moment, one side is under pressure and the other side is under tension under the action of the bending moment, and a plastic hinge is formed earlier. Particularly, the construction of a column base node of a concrete frame structure is the key for exerting the shock resistance of the concrete structure, and plastic hinges inevitably occur under the action of a strong earthquake. For a traditional concrete column, the limit compressive strain which can be provided by concrete on the compression side of the column bottom is very small, the improvement effect of limiting the compressive strain by adopting a restraining reinforcement is also very limited, under the action of alternate repeated bending moment, the compressed concrete can be pressed to be crisp due to fatigue, the buckling of a compressed main reinforcement cannot be limited by a stirrup, and the phenomena of serious concrete crushing and stripping, stirrup outward bulging and breaking and the like exist, so that the bearing capacity of a hysteretic curve is remarkably reduced. The concrete at the bottom of the column is crushed and the yield of the compressed steel bars makes post-earthquake repair difficult. How to reduce the damage on the column bottom under the action of earthquake and make the damage concentrate on the position convenient for post-earthquake repair to realize the goal of controllable damage is a common concern of researchers.
(2) Buckling Restrained Brace (BRB)
The study on a safe, reliable, economical and applicable structural earthquake-resistant system and a shock absorption method can reduce the influence of earthquake disasters to the maximum extent, and is a great demand and urgent task in the engineering field. The energy dissipation shock attenuation absorbs and dissipates the earthquake energy through the energy dissipation device, can effectively reduce the response and the damage of structure, avoids the major structure to take place serious destruction, is the important means of realizing based on performance antidetonation. The Buckling Restrained Brace (BRB) is an axial force-bearing component which restrains and supports the core plate through an external restraining component and prevents the core plate from buckling under pressure, and can fully play the hysteretic property of the core plate under the action of cyclic tension and compression under the action of a strong earthquake so as to achieve the purpose of dissipating earthquake energy. In frame structures, Buckling Restrained Braces (BRBs) are typically disposed between diagonal nodes of the frame, and the component size is large, which has a certain adverse effect on the frame structure space utilization. There are also angle braces placed near the outside of the beam-column joint, which saves structural space compared to Buckling Restrained Braces (BRBs), but still adversely affects structural aesthetics and space utilization.
(3) Post-earthquake remediation
After a violent earthquake occurs, the yield part of the structure is greatly damaged. The damaged engineering structure has the disadvantages of weakened load bearing and acting capacity, deteriorated stress performance and lowered safety of the structure. Under the action of earthquake which may happen in the future, structural integrity is more likely to be lost due to accelerated failure of damaged parts, collapse is seriously likely to happen, and huge loss of lives and properties of people is caused. But if the bearing capacity and the stress performance of the structure can be recovered through quick repair work, the method plays a vital beneficial role in recovering and reconstructing after disasters.
SUMMERY OF THE UTILITY MODEL
The technical problem is as follows: the utility model discloses the technical problem who aims at does: (1) the construction of column base node is the key to the exertion of the shock resistance of concrete structure. Under the action of a strong earthquake, the column base joint bears large axial force and bending moment, and the joint is easy to have the phenomena of crushed concrete in a compression area, buckling of a compression main reinforcement, collapse of an outer hoop reinforcement and the like, so that the bearing capacity of a hysteresis curve is obviously reduced; (2) the easy replacement of the damaged component is the key to ensure the easy repair of the structural performance. At present, the easy repair of structural performance is the latest requirement of engineering structure for earthquake resistance. The energy-consuming connection dissipates the seismic energy through the plastic hysteresis energy-consuming capacity of the material, and the development and accumulation of the plasticity bring gradual and aggravated structural damage. In order to ensure that the post-earthquake structure has the earthquake resistance which can bear the earthquake possibly encountered in the subsequent service period, the rapid repair of the damaged structure after the earthquake is the most economic scheme, and the replacement of the damaged component is the most thorough and perfect repair means for repairing the structure; (3) the existing post-earthquake repairable concrete column foot node has some defects. In the method for arranging the post-earthquake replaceable energy consumption connecting piece at the joint of the concrete column foot, a replaceable steel plate is mostly adopted as a main energy consumption part, but an effective buckling restraining device is absent outside the side face and the plane of the replaceable steel plate, so that the replaceable steel plate is easily subjected to compression buckling under the action of a large earthquake, the full-section yielding is difficult to achieve, and the hysteretic energy consumption capability of the replaceable steel plate cannot be well exerted. In addition, in existing utility model, adopt bolted connection more between removable steel sheet and concrete shaft, the concrete foundation, the connection structure form is comparatively complicated, and the component preparation is higher to the construction precision requirement when installing, and the prosthetic work load after the shake is great. The utility model aims at providing a concrete column base node that contains removable power consumption coupling assembling of high ductility to satisfy simultaneously that the atress is reasonable, the construction is convenient, the structure is pleasing to the eye, energy dissipation shock-absorbing capacity is strong and shake the requirement of back easy restoration.
The technical scheme is as follows: the utility model relates to a concrete column base node that contains removable power consumption coupling assembling of high ductility, concrete column base node sets up in concrete structure rectangular cross section column bottom, including concrete column, the removable power consumption coupling assembling of high ductility and concrete foundation, the removable power consumption coupling assembling of high ductility passes through the welding with pre-buried steel connecting block in concrete column and the concrete foundation respectively and constitutes a continuous reliable biography power system.
Further, the concrete column includes that concrete shaft and rectangular cross section's column bottom strengthen the stem, thereby the cross-section of the core column is strengthened to the column bottom is less than the cross-section of concrete shaft and forms the headspace, and the cross-section center of the core column is strengthened to the column bottom and the cross-section center of concrete shaft is located same plumb line. The concrete column bottom is equipped with the column bottom and strengthens the stem, and even the axial compression ratio of post is great, the damage still can not take place for strengthening the stem at the column bottom, avoids appearing traditional concrete column bottom and receives the condition that the district concrete is crushed.
Furthermore, a section mutation area exists between the concrete column body and the column bottom reinforcing core column, the section mutation area is provided with a column bottom steel connecting block, and the column bottom steel connecting block is fixedly connected with a column inner anchoring longitudinal rib in the concrete column body.
Furthermore, the high-ductility replaceable energy-consumption connecting component is arranged on four side faces of the column bottom reinforcing core column respectively, the remaining part of the reserved space is filled with filling concrete after the installation is completed, and a horizontal seam is reserved at the upper end and/or the lower end of the high-ductility replaceable energy-consumption connecting component respectively when the filling concrete is poured. The high-ductility replaceable energy-consumption connecting assembly is equivalent to a small buckling restrained brace, is arranged on four sides of a concrete column base node to replace ductility energy-consumption assemblies of original position stressed longitudinal bars, and is very convenient to construct and install. The horizontal seam is used to prevent the filled concrete from bearing the vertical pressure when the column is bent.
Further, removable power consumption coupling assembling of high ductility includes the power consumption core steel sheet that one or polylith was arranged side by side, surrounds two restraint apron and two packing plates of power consumption core steel sheet to and connecting bolt, two restraint apron are located both sides around the steel face of power consumption core steel sheet respectively, two packing plates are located the steel body left and right sides of power consumption core steel sheet respectively, connecting bolt will restrain apron and packing plate and link as an organic wholely, all be equipped with the bolt hole that is convenient for connecting bolt aligns and passes on restraint apron and the packing plate, power consumption core steel sheet is complete steel sheet or middle part fluting steel sheet, and power consumption core steel sheet is wrapped up by the unbonded material. The energy-consuming core steel plate is restrained by the restraining cover plate and the filling plate when being pressed, the restraining cover plate and the filling plate are fixed on the periphery of the energy-consuming core steel plate through the connecting bolts, and even if the energy-consuming core steel plate is pressed to yield, large-amplitude buckling cannot occur.
Furthermore, the energy-consuming core steel plate is sequentially divided into a column-direction connecting section, a column-direction transition section, an energy-consuming section, a foundation-direction transition section and a foundation-direction connecting section from top to bottom along the length direction, the sectional areas of the column-direction connecting section and the foundation-direction connecting section are larger than that of the energy-consuming section, the energy-consuming section is in gentle transition with the column-direction connecting section and the foundation-direction connecting section to respectively form the column-direction transition section and the foundation-direction transition section, and a continuous and reliable force transferring system is formed between the column-direction connecting section and the steel connecting block at the bottom of the column through welding.
Furthermore, when the energy-consuming core steel plate is a middle slotted steel plate or a plurality of steel plates arranged side by side, slot part filling blocks are arranged in the space between the middle slotted steel plate or the plurality of steel plates.
Furthermore, the lengths of the constraint cover plate and the filling plate are slightly smaller than that of the energy consumption core steel plate; gaps are reserved among the corresponding surfaces of the constraint cover plate, the filling plate, the groove part filling block and the energy dissipation core steel plate, and the gaps are filled with non-adhesive materials.
Further, the concrete foundation includes basic concrete piece, protruding stopper and basic steel connecting block, basic steel connecting block anchor in the top surface of basic concrete piece and corresponding with the position of column bottom steel connecting block, the bottom surface of strengthening the stem at the bottom of the column is placed in the top surface central authorities of basic concrete piece, protruding stopper and the bottom side of strengthening the stem at the bottom of the column are pasted closely each other, protruding stopper and basic steel connecting block fixed connection, the muscle fixed connection is indulged with basic anchor in the bottom surface of basic steel connecting block, the basis of power consumption core steel sheet constitutes a continuous and reliable biography power system to between linkage segment and the basic steel connecting block through the welding. The column bottom reinforced core column is placed in the center of the top surface of the foundation concrete block and can freely swing under the action of an earthquake, and due to the fact that the protruding limiting blocks which are tightly attached but not connected are arranged on the periphery of the column bottom reinforced core column, the column bottom reinforced core column cannot slide in the horizontal direction, and the column bottom shearing force can be effectively resisted.
Furthermore, the axial tensile yield bearing capacity of the energy-consuming core steel plate is smaller than the connection bearing capacity between the column bottom steel connecting block and the column inner anchoring longitudinal rib in the concrete column, is also smaller than the connection bearing capacity between the foundation steel connecting block and the foundation anchoring longitudinal rib in the concrete foundation, is also smaller than the axial tensile bearing capacity between the column inner anchoring longitudinal rib and the foundation anchoring longitudinal rib, and is also smaller than the connection bearing capacity between the energy-consuming core steel plate and the column bottom steel connecting block and between the energy-consuming core steel plate and the foundation steel connecting block.
Has the advantages that: compared with the prior art, the utility model has the advantages of it is following:
1) the structure is clearly divided into labor and force transmission system is reasonable. The utility model discloses in, each component part of concrete column base node has clear and definite atress and divides the worker. The column bottom of concrete column lower part is strengthened the stem and is undertaken column bottom pressure under the earthquake effect, even the axial compression ratio of post is great, the damage still can not take place for the stem is strengthened to the column bottom, avoids appearing traditional concrete column bottom and receives the condition that district's concrete was crushed when the moment of flexure is great. The column bottom reinforced core column is placed in the center of the top surface of the foundation concrete block and can freely swing under the action of an earthquake, and due to the fact that the protruding limiting blocks which are tightly attached but not connected are arranged on the periphery of the column bottom reinforced core column, the column bottom reinforced core column cannot slide in the horizontal direction, and the column bottom shearing force can be effectively resisted. The position of the energy-consuming core steel plate in the high-ductility replaceable energy-consuming connecting component is in the same vertical plane with the anchoring longitudinal rib in each side column in the concrete column and the anchoring longitudinal rib in each side foundation in the concrete foundation, so that a direct and reasonable vertical force transmission system is convenient to form. The high-ductility replaceable energy-consumption connecting component can replace stressed longitudinal ribs at the original positions of the column base nodes and provide bending-resistant bearing capacity for the column base nodes;
2) the structure damage is concentrated, and the energy consumption performance is good. The utility model discloses in, the stem is strengthened at the bottom of the column that the regional steel core concrete structure of using of column bottom, high-strength concrete structure or built-up steel construction makeed, even the axial compression ratio of post is great, the damage still can not take place for the stem is strengthened at the bottom of the column. The utility model discloses in, owing to installed the power consumption core steel sheet of easy surrender at four side-mounting at the column bottom, make the plasticity action concentrate on the column base position under the earthquake action, and upper portion concrete column body is because of keeping away from bottom plasticity hinge region, the muscle is indulged in the post anchor in the concrete column simultaneously, the tensile bearing capacity of muscle is indulged in the pre-buried basis anchor in the concrete foundation and its and the steel connecting block between be connected the bearing capacity, the connection bearing capacity between steel connecting block and the power consumption core steel sheet all is greater than the tensile bearing capacity of power consumption core steel sheet, thereby make the damage of post concentrate on in the power consumption core steel sheet in the removable power consumption coupling assembling of column bottom high ductility. The energy-consuming core steel plate adopts a structural principle similar to that of the core plate in the buckling restrained brace, yielding only occurs in an energy-consuming section of the energy-consuming core steel plate, plastic strain is uniformly distributed after yielding, the energy-consuming core steel plate has smaller plastic strain under the same interlayer deformation, and excellent ductility and low cycle fatigue capability can be exerted;
3) the structure is easy and convenient to repair after earthquake. Under the action of earthquake, the damage of the concrete column foot joint in the utility model is concentrated in the energy consumption core steel plate in the column bottom high-ductility replaceable energy consumption connecting component, while other main components are not obviously damaged, and the function of the structure can be recovered only by replacing the energy consumption core steel plate after the earthquake, so that the maintenance range is small, and the maintenance process is very simple and convenient;
4) the installation is convenient and the tolerance adaptability is good. The high-ductility replaceable energy-consuming connecting component is just like a fuse of a concrete column, and yields first under the action of a strong earthquake to protect other parts of the column. In order to make the position of this concentrated damage be liable to change, the utility model discloses with its design for with the interior anchor of post indulge the muscle and throw off, can wait to install again after the installation of the rest parts of structure is accomplished. The afterloaded parts must have good tolerance-accommodating capabilities. If the size of the high-ductility replaceable energy-consuming connecting part is larger than or exactly equal to the size of the installation space of the components, the components collide with each other and are blocked, and the installation cannot be carried out. Therefore, in order to facilitate the installation of the components, the size of the high-ductility replaceable energy-consuming connecting component is slightly smaller than that of the installation space of the components, so that a gap may exist between the components after the components are installed, and the gap is very unfavorable for the column base node which bears the combined action of the axial force and the bending moment. The utility model adopts the welding seam connection mode to connect the energy consumption core steel plate in the high-ductility replaceable energy consumption connecting component with the pre-anchored column bottom and the steel connecting block on the top surface of the concrete foundation into a whole, thereby being convenient for eliminating the clearance between force transmission systems in the installation stage and being convenient for construction;
5) the practicability is strong, and the appearance is not influenced. The utility model discloses in, the removable power consumption coupling assembling of high ductility sets up in four side headspace of column base node, is wrapped up in column bottom filling concrete after the installation is accomplished. The appearance of the column base node is consistent with that of a common concrete column, and the traditional aesthetic property is met.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an exploded view of the present invention;
FIG. 3 is an exploded view of a high ductility replaceable energy dissipating connection assembly;
FIG. 4 is a schematic structural diagram of an energy-consuming core steel plate;
FIG. 5 is a front view of the structure of the present invention;
FIG. 6 is a front cross-sectional view of a concrete column leg joint including a high ductility replaceable energy dissipating connection assembly;
FIG. 7 is an enlarged view taken at A in FIG. 6;
figure 8 is a partial cross-sectional view of a high ductility replaceable energy dissipating connection assembly installed at a side of a column shoe node.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The invention will be further described with reference to the following figures and examples:
as shown in fig. 1 and 5, the utility model relates to a concrete column base node containing high-ductility replaceable energy-consumption connecting assembly, the concrete column base node is arranged at the bottom of a rectangular cross-section column of a concrete structure, and relates to the column base of a concrete frame structure, the bottom node of a bridge pier column and other parts, including a concrete column 1, a high-ductility replaceable energy-consumption connecting assembly 2 and a concrete foundation 3, the high-ductility replaceable energy-consumption connecting assembly 2 and steel connecting blocks pre-embedded in the concrete column 1 and the concrete foundation 3 respectively form a continuous and reliable force transmission system by welding;
as shown in fig. 2, the concrete column 1 includes a concrete column body 11 and a column bottom reinforcing column 12 with a rectangular cross section, the column bottom reinforcing column 12 can adopt a steel pipe concrete structure, a high-strength concrete structure or a combined steel structure but is not limited to the three structures, the first structure is a concrete block body which is a rectangular cross section core with four side surfaces and a bottom surface both restrained by steel plates, the second structure is a rectangular cross section block body made of high-strength materials such as high-strength grouting material and ultra-high performance concrete, the third structure is a section steel block made of a plurality of steel plates through fixed connection, the column bottom reinforcing column 12 bears column bottom pressure under the action of earthquake, even if the axial pressure of the column is large, the column bottom reinforcing column 12 cannot be damaged, and the situation that the concrete in the bottom compression area of the traditional concrete column 1 is crushed when the bending moment is large is avoided;
the section of the column bottom reinforcing column 12 is smaller than that of the concrete column body 11 so as to form a reserved space, and the center of the section of the column bottom reinforcing column 12 and the center of the section of the concrete column body 11 are positioned on the same vertical line; a section abrupt change region exists between the concrete column body 11 and the column bottom reinforcing core column 12, a column bottom steel connecting block 13 is arranged in the section abrupt change region, and the column bottom steel connecting block 13 is fixedly connected with an in-column anchoring longitudinal rib 14 in the concrete column body 11 to form a vertical force transmission system;
the high-ductility replaceable energy-consumption connecting components 2 are respectively arranged on four side surfaces of the column bottom reinforcing core column 12, the remaining part of the reserved space is filled with filling concrete 28 after the installation is finished, the appearance of a column base node is consistent with that of a common concrete column, the traditional aesthetics is met, and a horizontal seam 29 is respectively reserved at the upper end and/or the lower end of each high-ductility replaceable energy-consumption connecting component 2 when the filling concrete 28 is poured; the high-ductility replaceable energy-consumption connecting assembly 2 is equivalent to a small buckling restrained brace, is arranged on four sides of a concrete column base node to replace ductility energy-consumption assemblies of stressed longitudinal bars at the original position, is very convenient to construct and install, and the horizontal seam 29 is used for preventing filled concrete 28 from bearing the vertical pressure when the column is bent;
as shown in fig. 3, the high-ductility replaceable energy-consuming connecting assembly 2 includes one or more energy-consuming core steel plates 21 arranged side by side, two constraining cover plates 22 and two filling plates 23 surrounding the energy-consuming core steel plates 21, and connecting bolts 24, wherein the two constraining cover plates 22 are respectively located on the front and rear sides of the steel surface of the energy-consuming core steel plates 21 and are used for limiting the occurrence of out-of-plane instability of the energy-consuming core steel plates 21, the two filling plates 23 are respectively located on the left and right sides of the steel body of the energy-consuming core steel plates 21 and are used for limiting the occurrence of in-plane instability of the energy-consuming core steel plates 21, the constraining cover plates 22 and the filling plates 23 are connected into a whole by the connecting bolts 24, and the constraining cover plates 22; the energy consumption core steel plate 21 is restrained by the restraining cover plate 22 and the filling plate 23 when being pressed, the restraining cover plate 22 and the filling plate 23 are fixed on the periphery of the energy consumption core steel plate 21 through the connecting bolts 24, and even if the energy consumption core steel plate 21 is pressed to be buckled, large-amplitude buckling cannot occur; during normal use and small earthquakes, the energy-consuming core steel plate 21 in the high-ductility replaceable energy-consuming connecting component 2 keeps elasticity and can provide bending rigidity for the column base node; when the earthquake is moderate or large, the energy consumption core steel plate 21 is pulled or pressed to yield, and the hysteresis performance of the energy consumption core steel plate is utilized to dissipate the earthquake energy, so that the dynamic response of the structure is reduced;
as shown in fig. 4, the energy-consuming core steel plate 21 is sequentially divided into a column-direction connecting section 211, a column-direction transition section 212, an energy-consuming section 213, a foundation-direction transition section 214, and a foundation-direction connecting section 215 from top to bottom along the length direction, the sectional areas of the column-direction connecting section 211 and the foundation-direction connecting section 215 are larger than the sectional area of the energy-consuming section 213, the energy-consuming section 213 is gently transited between the column-direction connecting section 211 and the foundation-direction connecting section 215 to form the column-direction transition section 212 and the foundation-direction transition section 214, and a continuous and reliable force-transferring system is formed between the column-direction connecting section 211 and the column-bottom steel; the energy-consuming core steel plate 21 adopts a structural principle similar to that of the core plate in the buckling restrained brace, yielding only occurs in an energy-consuming section 213 of the energy-consuming core steel plate 21, plastic strain is uniformly distributed after yielding, the energy-consuming core steel plate 21 has smaller plastic strain under the same interlayer deformation, and excellent ductility and low cycle fatigue capability can be exerted;
the energy consumption core steel plate 21 can be a complete steel plate or a middle slotted steel plate, the energy consumption core steel plate 21 is wrapped by an unbonded material 27, when the energy consumption core steel plate 21 is a middle slotted steel plate or a plurality of steel plates arranged side by side, a slot part filling block 26 is arranged in a space between the middle slotted steel plate or the plurality of steel plates, and the lengths of the constraint cover plate 22 and the filling plate 23 are slightly smaller than that of the energy consumption core steel plate 21; gaps are reserved among the corresponding surfaces of the constraint cover plate 22, the filling plate 23, the groove part filling block 26 and the energy consumption core steel plate 21, and the gaps are filled with the non-adhesive material 27;
as shown in fig. 6 to 8, the concrete foundation 3 includes a foundation concrete block 31, a protruding stopper 32 and a foundation steel connecting block 33, the foundation steel connecting block 33 is anchored on the top surface of the foundation concrete block 31 and corresponds to the position of the column bottom steel connecting block 13, the bottom surface of the column bottom reinforced core column 12 is placed in the center of the top surface of the foundation concrete block 31, the protruding stopper 32 and the bottom side surface of the column bottom reinforced core column 12 are attached to each other, the protruding stopper 32 is fixedly connected with the foundation steel connecting block 33, the bottom surface of the foundation steel connecting block 33 is fixedly connected with the foundation anchoring longitudinal rib 34, and a continuous and reliable force transmission system is formed between the foundation direction connecting section 215 of the energy-consuming core steel plate 21 and the foundation steel connecting block 33 by welding; the column bottom reinforced core column 12 is placed in the center of the top surface of the foundation concrete block 31 and can freely swing under the action of an earthquake, but because the periphery of the column bottom reinforced core column 12 is provided with the raised limit blocks 32 which are tightly attached but not connected, the column bottom reinforced core column 12 cannot slide in the horizontal direction and can effectively resist the shear force of the column bottom, the raised limit blocks 32 can be replaced by raised limit steel bars and raised limit short steel bars, but are not limited to the three structures, and play a role in resisting the shear force of the column bottom; the position of the energy-consuming core steel plate 21 in the high-ductility replaceable energy-consuming connecting assembly 2 is in the same vertical plane with the anchoring longitudinal ribs 14 in each side column in the concrete column 1 and the anchoring longitudinal ribs 34 in each side foundation in the concrete foundation 3, so that a direct and reasonable vertical force transmission system is conveniently formed, and the high-ductility replaceable energy-consuming connecting assembly 2 can replace stressed longitudinal ribs at the original position of a column base node and provide bending-resistant bearing capacity for the column base node;
in the utility model, because the easily yielding energy-consuming core steel plates 21 are arranged on four side surfaces of the column bottom, the plastic behavior under the earthquake action is concentrated on the column base part, the upper concrete column body 11 is far away from the plastic hinge area of the bottom layer, and simultaneously, the axial tensile yielding bearing capacity of the energy-consuming core steel plates 21 in the high-ductility replaceable energy-consuming connecting assembly 2 is smaller than the connecting bearing capacity between the column bottom steel connecting block 13 and the column inner anchoring longitudinal rib 14 in the concrete column 1, is also smaller than the connecting bearing capacity between the foundation steel connecting block 33 and the foundation anchoring longitudinal rib 34 in the concrete foundation 3, is also smaller than the axial tensile bearing capacity of the column inner anchoring longitudinal rib 14 and the foundation anchoring longitudinal rib 34, is also smaller than the connecting bearing capacity between the energy-consuming core steel plates 21 and the column bottom steel connecting block 13 and between the energy-consuming core steel plates 21 and the foundation steel connecting block 33, so that the damage of the column is concentrated in the energy-consuming core steel plates 21 in the high-, the utility model adopts the welding seam connection mode to connect the energy consumption core steel plate 21 in the high-ductility replaceable energy consumption connecting component 2 with the pre-anchored column bottom and the steel connecting block on the top surface of the concrete foundation into a whole, thereby being convenient for eliminating the clearance between force transmission systems in the installation stage and being convenient for construction, through the design, the bearing capacity of other parts on the force transmission path of the structure is larger than that of the energy consumption core steel plate 21, the control damage is only concentrated on the energy consumption core steel plate 21, the rest parts of the structure are kept in good condition, after an earthquake, the connection between the energy consumption core steel plate 21 and the concrete column and the concrete foundation and the restraint of the restraint cover plate 22 and the filling plate 23 around the energy consumption core steel plate 21 can be removed, the damaged energy consumption core steel plate 21 is replaced by a new energy consumption core steel plate 21, the function of the structure can be recovered, the maintenance range is small, and the maintenance process is very simple and convenient.
The utility model has the characteristics that the structure atress divides the worker to make clear and definite, pass the power route direct, and the power consumption core steel sheet 21 among the removable power consumption coupling assembling 2 of high ductility can exert stable ductility power consumption ability, even concrete column 1's axial compression ratio is great, still can realize that the damage at the bottom of the column is only concentrated on power consumption core steel sheet 21, and can change the power consumption core steel sheet 21 that receives the damage after the macroseism very conveniently to resume structural function fast.
The utility model discloses a use method:
1) component fabrication
Respectively processing and manufacturing a concrete column 1 and a concrete foundation 3 according to the designed size, and arranging a reserved space in a column base node area for installing a high-ductility replaceable energy-consumption connecting assembly 2;
processing and manufacturing each part in the high-ductility replaceable energy consumption connecting assembly 2 according to the designed size;
2) high-ductility replaceable energy-consumption connecting component installation
Installing the energy-consuming core steel plate 21 wrapped with the unbonded material 27 around the high-ductility replaceable energy-consuming connecting assembly 2 between a column bottom steel connecting block 13 in the concrete column 1 and a foundation steel connecting block 33 in the concrete foundation 3, adjusting the front, rear, left and right positions of the energy-consuming core steel plate to enable the energy-consuming core steel plate to have a direct vertical force transmission relationship with the in-column anchoring longitudinal bar 14 in the concrete column body 11 and each side foundation anchoring bar 34 in the concrete foundation 3, connecting the column direction connecting section 211 of the energy-consuming core steel plate 21 with the column bottom steel connecting block 13 through a welding seam, and connecting the foundation direction connecting section 215 of the energy-consuming core steel plate 21 with the foundation steel connecting block 33 through a welding seam; the installation of the constraint cover plates 22, the filling plates 23 and the groove part filling blocks 26 in the high-ductility replaceable energy consumption connecting component 2 and the installation of the energy consumption core steel plate 21 are alternately performed, the two constraint cover plates 22 are respectively positioned at the front side and the rear side of the steel surface of the energy consumption core steel plate 21, the two filling plates 23 are respectively positioned at the left side and the right side of the steel body of the energy consumption core steel plate 21, then the constraint cover plates 22 and the filling plates 23 are connected into a whole through connecting bolts 24, and the connecting bolts 24 are aligned and penetrate through bolt holes in the constraint cover plates 22 and the filling plates 23;
the length of the restraining cover plate 22 and the filling plate 23 is slightly less than that of the energy consumption core steel plate 21; gaps are reserved among the corresponding surfaces of the constraint cover plate 22, the filling plate 23, the groove part filling block 26 and the energy consumption core steel plate 21, and the gaps are filled with the non-adhesive material 27;
3) replacement of post-earthquake damaged energy-consuming core steel plate 21
After a large earthquake occurs, chiseling partial concrete around the column base joint, cutting the upper end and the lower end of an energy consumption core steel plate 21 in the high-ductility replaceable energy consumption connecting assembly 2 to be connected with a welding seam between a column bottom steel connecting block 13 in the concrete column 1 and a foundation steel connecting block 33 in the concrete foundation 3, removing a constraint cover plate 22, a filling plate 23 and a groove part filling block 26, taking down the damaged energy consumption core steel plate 21, replacing a new energy consumption core steel plate 21, then reinstalling a new energy consumption assembly according to the energy consumption assembly installing method, and reinstalling the rest part of the reserved space with filling concrete 28, so that the earthquake resistance of the structure is recovered.
Claims (10)
1. The utility model provides a concrete column foot node that contains removable power consumption coupling assembling of high ductility which characterized in that: the concrete column foot node is arranged at the bottom of a concrete structure rectangular section column and comprises a concrete column, a high-ductility replaceable energy consumption connecting assembly and a concrete foundation, wherein the high-ductility replaceable energy consumption connecting assembly is welded with a steel connecting block pre-embedded in the concrete column and the concrete foundation respectively to form a continuous and reliable force transmission system.
2. The concrete column leg node with the high ductility replaceable energy dissipating connecting assembly as claimed in claim 1, wherein: the concrete column includes that concrete shaft and rectangular cross section's column bottom strengthen the stem, thereby the cross-section of column bottom strengthen the stem is less than the cross-section of concrete shaft and forms the headspace, and the cross-section center of column bottom strengthen the stem and the cross-section center of concrete shaft is located same plumb line.
3. The concrete column leg node with the high ductility replaceable energy dissipating connecting assembly as claimed in claim 2, wherein: a section mutation area exists between the concrete column body and the column bottom reinforcing core column, the section mutation area is provided with a column bottom steel connecting block, and the column bottom steel connecting block is fixedly connected with a column inner anchoring longitudinal rib in the concrete column body.
4. The concrete column leg node with the high ductility replaceable energy dissipating connecting assembly as claimed in claim 3, wherein: the high-ductility replaceable energy-consumption connecting assembly is arranged on four side faces of the column bottom reinforcing core column respectively, the remaining part of the reserved space is filled with filling concrete after the installation is completed, and a horizontal seam is reserved at the upper end and/or the lower end of the high-ductility replaceable energy-consumption connecting assembly respectively when the filling concrete is poured.
5. The concrete column leg node with the high ductility replaceable energy dissipating connecting assembly as claimed in claim 4, wherein: removable power consumption coupling assembling of high ductility includes the power consumption core steel sheet that one or polylith arranged side by side, surrounds two restraint apron and two packing boards of power consumption core steel sheet to and connecting bolt, two restraint apron are located both sides around the steel face of power consumption core steel sheet respectively, two packing boards are located the steel body left and right sides of power consumption core steel sheet respectively, connecting bolt will restrain apron and packing board and link as an organic wholely, all be equipped with the bolt hole that is convenient for connecting bolt aligns and passes on restraint apron and the packing board, power consumption core steel sheet is complete steel sheet or middle part fluting steel sheet, and power consumption core steel sheet is wrapped up by the unbonded material.
6. The concrete column leg node with the high ductility replaceable energy dissipating connecting assembly as claimed in claim 5, wherein: the energy-consuming core steel plate is sequentially divided into a column-direction connecting section, a column-direction transition section, an energy-consuming section, a foundation-direction transition section and a foundation-direction connecting section from top to bottom along the length direction, the sectional areas of the column-direction connecting section and the foundation-direction connecting section are larger than that of the energy-consuming section, the energy-consuming section and the column-direction connecting section and the foundation-direction connecting section are in smooth transition to form the column-direction transition section and the foundation-direction transition section respectively, and the column-direction connecting section and the bottom steel connecting block are welded to form a continuous and reliable force transferring system.
7. The concrete column leg node with the high ductility replaceable energy dissipating connecting assembly as claimed in claim 5, wherein: when the energy consumption core steel plate adopts a middle slotted steel plate or a plurality of steel plates arranged side by side, a slot part filling block is arranged in the space between the middle slotted steel plate or the plurality of steel plates.
8. The concrete column leg node with the high ductility replaceable energy dissipating connecting assembly as claimed in claim 5, wherein: the lengths of the constraint cover plate and the filling plate are slightly smaller than that of the energy dissipation core steel plate; gaps are reserved among the corresponding surfaces of the constraint cover plate, the filling plate, the groove part filling block and the energy dissipation core steel plate, and the gaps are filled with non-adhesive materials.
9. The concrete column leg node with the high ductility replaceable energy dissipating connecting assembly as claimed in claim 6, wherein: the concrete foundation includes basic concrete piece, protruding stopper and basic steel connecting block, basic steel connecting block anchor in the top surface of basic concrete piece and corresponding with the position of column bottom steel connecting block, the bottom surface of the stem is strengthened at the bottom of the post bottom is placed in the top surface central authorities of basic concrete piece, protruding stopper is strengthened the bottom side of stem and is pasted tightly each other with the column bottom, protruding stopper and basic steel connecting block fixed connection, muscle fixed connection is indulged with basic anchor in the bottom surface of basic steel connecting block, the basis of power consumption core steel sheet constitutes a continuous and reliable biography power system to connecting section and basic steel connecting block between through the welding.
10. The concrete column leg node with the high ductility replaceable energy dissipating connecting assembly as claimed in claim 9, wherein: the axial tensile yield bearing capacity of the energy-consuming core steel plate is smaller than the connection bearing capacity between a column bottom steel connecting block and a column inner anchoring longitudinal rib in a concrete column, is also smaller than the connection bearing capacity between a foundation steel connecting block and a foundation anchoring longitudinal rib in a concrete foundation, is also smaller than the axial tensile bearing capacity between the column inner anchoring longitudinal rib and the foundation anchoring longitudinal rib, and is also smaller than the connection bearing capacity between the energy-consuming core steel plate and the column bottom steel connecting block and between the energy-consuming core steel plate and the foundation steel connecting block.
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| CN201921201163.0U CN210798069U (en) | 2019-07-29 | 2019-07-29 | Concrete column base node containing high-ductility replaceable energy-consumption connecting assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110359633A (en) * | 2019-07-29 | 2019-10-22 | 东南大学 | A kind of concrete foot joint of the replaceable energy consumption connection component containing high ductility |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110359633A (en) * | 2019-07-29 | 2019-10-22 | 东南大学 | A kind of concrete foot joint of the replaceable energy consumption connection component containing high ductility |
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