A reinforced concrete column footing foundation with a self-resetting function and a construction method

Abstract

The present invention discloses a reinforced concrete column footing foundation with a self - reset function and a construction method, which relates to the field of building technology. It includes a concrete column, a concrete foundation, a backing plate, a concrete filling pipe, a bottom plate, a plurality of energy - dissipating components, a plurality of shear - resisting components, a plurality of corbels and a plurality of prestressing tendons. A plurality of corbels are arranged circumferentially at the lower part of the concrete column. The bottom plate is fixed on the plurality of corbels. The concrete filling pipe is fixedly sleeved at the bottom of the concrete column. The backing plate and the concrete filling pipe are connected by a plurality of energy - dissipating components. The shear - resisting components are arranged on the upper surface of the backing plate and fixedly connected with the concrete foundation. The bottom of the shear - resisting components is in contact with the concrete filling pipe. The lower ends of the prestressing tendons pass through the backing plate and are anchored at the bottom of the concrete foundation, and the upper ends of the prestressing tendons pass through the bottom plate and are anchored above the bottom plate. This structure and construction method have high strength, stiffness and good self - reset ability, improve the seismic resistance, have relatively small overall residual deformation of the structure and low damage to structural members.

Description

Technical Field

[0001] The present invention relates to the technical field of construction, and particularly to a reinforced concrete column footing foundation with a self - reset function and a construction method therefor. Background Art

[0002] The connection structure between the column footing and the foundation affects the mechanical properties of the structure. In the prior art, the column footings of reinforced concrete frame structures are usually rigid column footings, which dissipate energy through the elastoplastic deformation of the column footings themselves. This design concept leads to component damage that is difficult to repair and large residual deformations. Summary of the Invention

[0003] To solve the above - mentioned technical problems, the present invention provides a reinforced concrete column footing foundation with a self - reset function and a construction method therefor, which has high strength, high stiffness and good self - reset ability, improves the seismic resistance, has relatively small overall residual deformation of the structure, and relatively low damage to structural components.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a reinforced concrete column footing foundation with a self - reset function, which includes a concrete column, a concrete foundation, a backing plate, a concrete - filled pipe, a bottom plate, a plurality of energy - dissipating components, a plurality of shear - resisting components, a plurality of corbels and a plurality of prestressing tendons. A plurality of the corbels are circumferentially arranged at the lower part of the concrete column. The bottom plate is sleeved on the concrete column and fixed on the plurality of corbels and located above the plurality of corbels. The concrete - filled pipe is fixedly sleeved at the bottom of the concrete column and is located below the plurality of corbels. The backing plate is arranged at the bottom of the concrete - filled pipe, and the backing plate and the concrete - filled pipe are connected by the plurality of energy - dissipating components. The backing plate is installed on the top of the concrete foundation. The shear - resisting components are arranged on the upper surface of the backing plate and fixedly connected to the concrete foundation. The bottom of the shear - resisting components is in contact with the concrete - filled pipe. The lower ends of the prestressing tendons pass through the backing plate and are anchored at the bottom of the concrete foundation, and the upper ends of the prestressing tendons pass through the bottom plate and are anchored above the bottom plate.

[0006] Preferably, the energy - dissipating component includes a support web, two support vertical plates and a plurality of energy - dissipating steel bars. The two support vertical plates are fixed on the backing plate. The support web is fixed on the concrete - filled pipe and is located between the two support vertical plates. Each support vertical plate and the support web are connected by the plurality of horizontally arranged energy - dissipating steel bars.

[0007] Preferably, the diameter of the energy - dissipating steel bar increases sequentially from the middle to the end close to the support vertical plate, and the diameter of the energy - dissipating steel bar also increases sequentially from the middle to the end close to the support web.

[0008] Preferably, the shear-resistant assembly includes shear keys and a plurality of embedded bolts. Each shear key includes a vertical limb and a horizontal limb fixed to one side of the bottom of the vertical limb. The horizontal limb is located on the backing plate and is fixedly connected to the concrete foundation through the plurality of embedded bolts. The vertical limb is inclined outward from bottom to top, and the bottom of the vertical limb contacts the concrete-filled pipe.

[0009] Preferably, it further includes a plurality of high-strength bolts, and the backing plate is mounted on the top of the concrete foundation through the plurality of high-strength bolts.

[0010] Preferably, it further includes a plurality of stud bolts, and the concrete-filled pipe is fixedly connected to the concrete column through the plurality of stud bolts.

[0011] Preferably, the concrete column is a rectangular column, the concrete-filled pipe is a rectangular pipe, there are eight corbels, one corbel is provided at each end of each side of the concrete column, both the energy-dissipating assembly and the shear-resistant assembly are provided with four, and one energy-dissipating assembly and one shear-resistant assembly are provided on each side of the concrete-filled pipe.

[0012] Preferably, it further includes a plurality of first anchors and a plurality of second anchors. A plurality of prestressed ducts are provided in the concrete foundation. The lower ends of the prestressed tendons pass through the backing plate and the prestressed ducts and are anchored to the bottom of the concrete foundation through the first anchors, and the upper ends of the prestressed tendons pass through the bottom plate and are anchored above the bottom plate through the second anchors.

[0013] The present invention also provides a construction method for a reinforced concrete column footing foundation with a self-resetting function, including the following steps:

[0014] Step 1: Embed the backing plate in the top surface of the concrete foundation, place the concrete column on the backing plate, circumferentially arrange a plurality of the corbels below the concrete column, and fix the bottom plate above the plurality of corbels;

[0015] Step 2: Sleeve the concrete-filled pipe on the bottom of the concrete column, and fix the concrete-filled pipe to the concrete column;

[0016] Step 3: Install a plurality of the prestressed tendons, and anchor the two ends of each prestressed tendon to the bottom of the concrete foundation and the top of the bottom plate respectively;

[0017] Step 4: Fix the energy-dissipating assembly to the concrete-filled pipe and the backing plate;

[0018] Step 5: Arrange the shear resistance component on the backing plate so that the bottom of the shear resistance component is in contact with the concrete-filled tube, and fix the shear resistance component to the concrete foundation.

[0019] The present invention has achieved the following technical effects compared with the prior art:

[0020] The reinforced concrete column footing foundation with self-resetting function and construction method provided by the present invention include a concrete column, a concrete foundation, a backing plate, a concrete-filled tube, a bottom plate, a plurality of energy dissipation components, a plurality of shear resistance components, a plurality of corbels and a plurality of prestressing tendons. A plurality of corbels are arranged circumferentially at the lower part of the concrete column. The bottom plate is fixed on the plurality of corbels. The lower ends of the prestressing tendons pass through the backing plate and are anchored at the bottom of the concrete foundation. The upper ends of the prestressing tendons pass through the bottom plate and are anchored above the bottom plate. That is, in the present invention, the concrete column is fixed to the concrete foundation through the prestressing tendons, forming a column footing foundation based on prestressed connection, which has high strength, stiffness and good self-resetting ability. At the same time, by arranging the energy dissipation components, the energy of the earthquake can be dissipated, thereby improving the seismic resistance ability and reducing the residual deformation after the earthquake; by arranging the shear resistance components to resist the shear force at the bottom of the column, the structure of the reinforced concrete column footing foundation is more stable. In the present invention, the prestress technology is combined with the prefabricated assembly technology, so that after this structure is affected by natural disasters such as earthquakes and typhoons, the overall residual deformation of the structure is small, the damage of the structural members is low, and various equipment inside the building can still operate normally. After the earthquake, it can still be used after simple maintenance or even without maintenance. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 It is the front view of the reinforced concrete column footing foundation with self-resetting function provided by the present invention;

[0023] Figure 2 It is the top view of the reinforced concrete column footing foundation with self-resetting function provided by the present invention.

[0024] Description of the reference numerals: 100, reinforced concrete column footing foundation with self-resetting function; 1, concrete column; 2, bottom plate; 3, corbel; 4, backing plate; 5, supporting vertical plate; 6, supporting web; 7, energy-dissipating steel bar; 8, shear key; 801, horizontal limb; 802, vertical limb; 9, embedded bolt; 10, high-strength bolt; 11, prestressed tendon; 12, first anchor; 13, second anchor; 14, prestressed duct; 15, concrete-filled tube. Detailed implementation manners

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] The object of the present invention is to provide a reinforced concrete column footing foundation with self-resetting function and a construction method, which have high strength, stiffness and good self-resetting ability, improve the seismic resistance, have relatively small overall residual deformation of the structure, and relatively low damage to structural members.

[0027] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0028] As Figure 1 and Figure 2As shown in the figure, this embodiment provides a reinforced concrete column footing foundation 100 with a self-resetting function, which includes a concrete column 1, a concrete foundation, a backing plate 4, a concrete-filled pipe 15, a bottom plate 2, a plurality of energy-dissipating components, a plurality of shear-resistant components, a plurality of corbels 3, and a plurality of prestressing tendons 11. A plurality of corbels 3 are arranged circumferentially at the lower part of the concrete column 1. The bottom plate 2 is sleeved on the concrete column 1 and fixed on the plurality of corbels 3 and located above the plurality of corbels 3. The concrete-filled pipe 15 is fixedly sleeved at the bottom of the concrete column 1, and the concrete-filled pipe 15 is located below the plurality of corbels 3. The backing plate 4 is arranged at the bottom of the concrete-filled pipe 15, and the backing plate 4 and the concrete-filled pipe 15 are connected by a plurality of energy-dissipating components. The backing plate 4 is installed on the top of the concrete foundation. By setting the energy-dissipating components, the energy of the earthquake can be dissipated, thereby improving the seismic capacity and reducing the residual deformation after the earthquake; the shear-resistant components are arranged on the upper surface of the backing plate 4 and fixedly connected to the concrete foundation, and the bottom of the shear-resistant components is in contact with the concrete-filled pipe 15. By setting the shear-resistant components to resist the shear force at the bottom of the column, the structure of the reinforced concrete column footing foundation is more stable; the lower ends of the prestressing tendons 11 pass through the backing plate 4 and are anchored at the bottom of the concrete foundation, and the upper ends of the prestressing tendons 11 pass through the bottom plate 2 and are anchored above the bottom plate 2. That is, in this embodiment, the concrete column 1 is fixed to the concrete foundation through the prestressing tendons 11. The connection method is simple and easy to construct, forming a column footing foundation based on prestressed connection, which has high strength, stiffness and good self-resetting ability, and avoids the secondary internal force caused by the axial shortening of the concrete column 1 under the axial pressure of the prestressing tendons 11.

[0029] It can be seen that in this embodiment, the prestress technology is combined with the prefabricated assembly technology, so that after this structure is affected by natural disasters such as earthquakes and typhoons, the overall residual deformation of the structure is small, the damage of the structural components is low, and various equipment inside the building can still operate normally. After the earthquake, it can still be used after simple repair or even without repair.

[0030] Specifically, the energy-dissipating component includes a support web 6, two support vertical plates 5, and a plurality of energy-dissipating steel bars 7. The two support vertical plates 5 are fixed on the backing plate 4, the support web 6 is fixed on the concrete-filled pipe 15, and the support web 6 is located between the two support vertical plates 5. Each support vertical plate 5 is connected to the support web 6 by a plurality of horizontally arranged energy-dissipating steel bars 7. Replaceable energy-dissipating steel bars 7 are arranged in both main axis directions of the concrete column 1. Through the yield energy dissipation of the energy-dissipating steel bars 7, the reinforced concrete column footing foundation is kept elastic. Even under the action of a large torsional effect, the reinforced concrete column footing foundation can avoid and reduce irreparable damage. Specifically, under such a torque action, small inelastic deformations can occur in the holes and bottoms of the support vertical plates 5 without affecting the structural state of the reinforced concrete column footing foundation. By adjusting the pretension, position of the prestressing tendons 11, and the diameter, strength and position of the energy-dissipating steel bars 7, the good self-resetting characteristics of the structure can be ensured.

[0031] The diameter of the energy-dissipating steel bar 7 increases successively from the middle to one end close to the supporting vertical plate 5, and the diameter of the energy-dissipating steel bar 7 also increases successively from the middle to one end close to the supporting web 6. That is, in this embodiment, the diameters of the connecting parts at both ends of the energy-dissipating steel bar 7 are larger, and the diameter of the middle part is smaller, presenting a hourglass shape, avoiding stress concentration, enabling uniform plastic deformation to occur in the middle part while the connecting parts still remain elastic.

[0032] In this specific embodiment, the energy-dissipating assembly includes four energy-dissipating steel bars 7. Two energy-dissipating steel bars 7 are arranged between each supporting vertical plate 5 and the supporting web 6, and the two energy-dissipating steel bars 7 are arranged corresponding to each other vertically.

[0033] Specifically, the shear-resistant assembly includes a shear key 8 and a plurality of embedded bolts 9. The shear key 8 includes a vertical limb 802 and a horizontal limb 801 fixed to one side of the bottom of the vertical limb 802. The horizontal limb 801 is located on the upper surface of the backing plate 4 and is fixedly connected to the concrete foundation through a plurality of embedded bolts 9. The vertical limb 802 is inclined outward from bottom to top, and the bottom of the vertical limb 802 is in contact with the concrete-filled pipe 15. That is, in this embodiment, the vertical limb 802 of the shear key 8 has an outward inclination angle with the column foot facade of the concrete column 1 to adapt to the lateral deformation of the concrete column 1. The horizontal limb 801 is fixedly connected to the concrete foundation through a plurality of embedded bolts 9, that is, the embedded bolts 9 pass through the horizontal limb 801 and the backing plate 4 in sequence and are fixed in the concrete foundation. There are three embedded bolts 9 in the shear-resistant assembly of this embodiment.

[0034] This embodiment also includes a plurality of high-strength bolts 10. The backing plate 4 is installed on the top of the concrete foundation through a plurality of high-strength bolts 10.

[0035] This embodiment also includes a plurality of stud bolts. The concrete-filled pipe 15 is fixedly connected to the concrete column 1 through a plurality of stud bolts.

[0036] In this specific embodiment, the concrete column 1 is a rectangular column, the concrete-filled pipe 15 is a rectangular pipe, there are eight corbels 3, one corbel 3 is provided at each end of each side of the concrete column 1, both the energy-dissipating assembly and the shear-resistant assembly are provided with four, and one energy-dissipating assembly and one shear-resistant assembly are provided on each side of the concrete-filled pipe 15.

[0037] In this specific embodiment, the backing plate 4 is a steel backing plate, the prestressing tendon 11 is a prestressing steel bar, the concrete-filled pipe 15 is made of an outer steel plate, the outer steel plate is surrounded into a rectangle along the bottom of the concrete column 1, and is connected to the concrete column 1 through stud bolts to work together.

[0038] This embodiment also includes a plurality of first anchor devices 12 and a plurality of second anchor devices 13. A plurality of prestressed ducts 14 are provided in the concrete foundation. The lower ends of the respective prestressed tendons 11 pass through the backing plate 4 and the prestressed ducts 14 and are anchored to the bottom of the concrete foundation by the first anchor devices 12, and the upper ends of the respective prestressed tendons 11 pass through the bottom plate 2 and are anchored above the bottom plate 2 by the second anchor devices 13. Specifically, the lower end of the prestressed tendon 11 is the anchorage end, and the upper end is the tensioning end.

[0039] This embodiment also provides a construction method for a reinforced concrete column footing foundation 100 with a self-resetting function, including the following steps:

[0040] Step 1: Embed the backing plate 4 in the top surface of the concrete foundation. Specifically, fix the two with high-strength bolts 10; place the concrete column 1 on the backing plate 4, arrange a plurality of corbels 3 circumferentially at the lower part of the concrete column 1, and fix the bottom plate 2 above the plurality of corbels 3. Specifically, arrange the corbels 3 at about 1.0 m above the bottom of the concrete column 1.

[0041] Step 2: Sleeve the concrete filling pipe 15 on the bottom of the concrete column 1 and fix the concrete filling pipe 15 to the concrete column 1. Specifically, form a rectangular concrete filling pipe 15 along the bottom of the concrete column 1 with an outer steel plate and fix it with stud bolts.

[0042] Step 3: Install a plurality of prestressed tendons 11, and anchor the two ends of each prestressed tendon 11 to the bottom of the concrete foundation and the top of the bottom plate 2 respectively.

[0043] Step 4: Fix the energy dissipation component to the concrete filling pipe 15 and the backing plate 4. Specifically, weld the support vertical plate 5 to the backing plate 4 and weld the support web 6 to the side wall of the concrete filling pipe 15.

[0044] Step 5: Arrange a shear resistance component on the backing plate 4 so that the bottom of the shear resistance component is in contact with the concrete filling pipe 15, and fix the shear resistance component to the concrete foundation. Specifically, make the bottom of the vertical limb 802 in contact with the concrete filling pipe 15, and fix the horizontal limb 801 to the concrete foundation through a plurality of embedded bolts 9.

[0045] In this specification, specific examples are used to elaborate on the principles and implementation manners of the present invention. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A reinforced concrete column footing foundation with a self - reset function, Characterized in that, It includes a concrete column, a concrete foundation, a base plate, a concrete - filled pipe, a bottom plate, a plurality of energy - dissipating components, a plurality of shear - resisting components, a plurality of corbels and a plurality of prestressed tendons. A plurality of the corbels are circumferentially arranged at the lower part of the concrete column. The bottom plate is sleeved on the concrete column and fixed on the plurality of corbels and located above the plurality of corbels. The concrete - filled pipe is fixedly sleeved at the bottom of the concrete column and the concrete - filled pipe is located below the plurality of corbels. The base plate is arranged at the bottom of the concrete - filled pipe, and the base plate and the concrete - filled pipe are connected by the plurality of energy - dissipating components. The base plate is installed on the top of the concrete foundation. The shear - resisting component is arranged on the upper surface of the base plate and fixedly connected with the concrete foundation. The bottom of the shear - resisting component is in contact with the concrete - filled pipe. The lower ends of the prestressed tendons pass through the base plate and are anchored at the bottom of the concrete foundation, and the upper ends of the prestressed tendons pass through the bottom plate and are anchored above the bottom plate. The energy - dissipating component includes a support web, two support vertical plates and a plurality of energy - dissipating steel bars. The two support vertical plates are fixed on the base plate, the support web is fixed on the concrete - filled pipe, and the support web is located between the two support vertical plates. Each support vertical plate and the support web are connected by the plurality of horizontally arranged energy - dissipating steel bars. The shear - resisting component includes a shear key and a plurality of embedded bolts. The shear key includes a vertical limb and a horizontal limb fixed on one side of the bottom of the vertical limb. The horizontal limb is located on the upper surface of the base plate and is fixedly connected with the concrete foundation through the plurality of embedded bolts. The vertical limb is inclined outward from bottom to top, and the bottom of the vertical limb is in contact with the concrete - filled pipe.

2. The reinforced concrete column footing foundation with a self - reset function according to claim 1, Characterized in that, The diameter of the energy - dissipating steel bar increases sequentially from the middle to the end close to the support vertical plate, and the diameter of the energy - dissipating steel bar increases sequentially from the middle to the end close to the support web.

3. The reinforced concrete column footing foundation with a self - reset function according to claim 1, Characterized in that, It further includes a plurality of high - strength bolts, and the base plate is installed on the top of the concrete foundation through the plurality of high - strength bolts.

4. The reinforced concrete column footing foundation with a self - reset function according to claim 1, Characterized in that, It further includes a plurality of stud bolts, and the concrete - filled pipe is fixedly connected with the concrete column through the plurality of stud bolts.

5. The reinforced concrete column footing foundation with a self - reset function according to claim 1, Characterized in that, The concrete column is a rectangular column, the concrete - filled pipe is a rectangular pipe, there are eight corbels, one corbel is arranged at each end of each side of the concrete column, both the energy - dissipating component and the shear - resisting component are arranged in four, and one energy - dissipating component and one shear - resisting component are arranged on each side of the concrete - filled pipe.

6. The reinforced concrete column footing foundation with self-resetting function according to claim 1, characterized in that, it further comprises a plurality of first anchors and a plurality of second anchors. A plurality of prestressed ducts are provided in the concrete foundation. The lower ends of the prestressed tendons pass through the backing plate and the prestressed ducts and are anchored to the bottom of the concrete foundation through the first anchors, and the upper ends of the prestressed tendons pass through the bottom plate and are anchored above the bottom plate through the second anchors.

7. A construction method of the reinforced concrete column footing foundation with self-resetting function according to any one of claims 1-6, characterized in that, it comprises the following steps: Step 1: Embed the backing plate in the top surface of the concrete foundation, place the concrete column on the backing plate, arrange a plurality of the corbels circumferentially at the lower part of the concrete column, and fix the bottom plate above the plurality of corbels; Step 2: Sleeve the concrete filling pipe on the bottom of the concrete column and fix the concrete filling pipe on the concrete column; Step 3: Install a plurality of the prestressed tendons, and anchor the two ends of each prestressed tendon to the bottom of the concrete foundation and the top of the bottom plate respectively; Step 4: Fix the energy dissipation assembly on the concrete filling pipe and the backing plate; Step 5: Arrange the shear resistance assembly on the backing plate so that the bottom of the shear resistance assembly is in contact with the concrete filling pipe, and fix the shear resistance assembly on the concrete foundation.

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