CN111979904A - Prefabricated assembled segment concrete-filled steel tube pier with additional energy dissipation device and construction method thereof - Google Patents
Prefabricated assembled segment concrete-filled steel tube pier with additional energy dissipation device and construction method thereof Download PDFInfo
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- CN111979904A CN111979904A CN202011018159.8A CN202011018159A CN111979904A CN 111979904 A CN111979904 A CN 111979904A CN 202011018159 A CN202011018159 A CN 202011018159A CN 111979904 A CN111979904 A CN 111979904A
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- pier
- bearing platform
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 81
- 239000010959 steel Substances 0.000 title claims abstract description 81
- 239000004567 concrete Substances 0.000 title claims abstract description 78
- 238000010276 construction Methods 0.000 title claims abstract description 21
- 230000021715 photosynthesis, light harvesting Effects 0.000 title claims abstract description 20
- 239000004918 carbon fiber reinforced polymer Substances 0.000 claims description 13
- 210000002435 tendon Anatomy 0.000 claims description 11
- 239000011210 fiber-reinforced concrete Substances 0.000 claims description 6
- 238000004873 anchoring Methods 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 5
- 239000011178 precast concrete Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
- E01D2101/285—Composite prestressed concrete-metal
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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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention provides a prefabricated assembled section concrete-filled steel tube pier with an additional energy dissipation device and a construction method thereof. The vertical bearing capacity and the horizontal lateral resistance of the pier assembled by the segments can be improved by utilizing the high performance of the steel pipe concrete.
Description
Technical Field
The invention relates to a prefabricated and assembled segment concrete-filled steel tube pier with an additional energy dissipation device and a construction method thereof.
Background
Currently, reinforced concrete structures are mainly formed by cast-in-place molding. However, the number of workers engaged in simple physical labor on the construction site in China is sharply reduced; at the same time, labor costs are also increasing. Therefore, there is a need for a reinforced concrete member that can be produced by a mechanized flow process in a prefabrication factory, and can be safely assembled and produced by mechanical hoisting on site with little personnel cooperation. To alleviate these problems, precast concrete construction is increasingly used.
The precast concrete bridge member is manufactured and processed in a factory, modern construction technologies such as automatic templates and steam curing can be used, the construction precision and the curing quality are improved, the precast member is transported to the bridge site to be assembled after being prefabricated, the site operation can be reduced, the concrete waste pollution and the construction noise of the construction site are reduced, the rapid construction is realized, and the traffic jam is reduced.
In the period of large-scale traffic infrastructure, the rapid bridge construction technology is more and more concerned and more emphasized by the advantages of high component processing quality, high construction efficiency, environmental friendliness and the like in the construction process of urban bridges and sea-crossing bridges. The bridge structure prefabrication and assembly technology is an important development direction for bridge engineering construction in the future.
Disclosure of Invention
The invention improves the problems, namely the technical problems to be solved by the invention are that the existing reinforced concrete structure is mainly formed by casting on site, the efficiency is low and the labor cost is high.
The specific embodiment of the invention is as follows: the prefabricated section assembled concrete-filled steel tube pier with the additional energy dissipation device comprises a bearing platform and a pier which is located above the bearing platform and formed by longitudinally and fixedly connecting a plurality of concrete-filled steel tube sections, wherein the concrete-filled steel tube sections comprise concrete columns and steel tubes sleeved outside the concrete columns, a prestressed pore channel is reserved between each concrete-filled steel tube section and the bearing platform, the pier is formed into a whole by stretching prestressed ribs in the prestressed pore channel, and the energy dissipation device is arranged between the top surface of the bearing platform and the side surface of each concrete-filled steel tube section at the bottom.
Furthermore, the lower extreme of concrete filled steel tube festival section is the annular joint, and the upper end of concrete filled steel tube festival section and the upper surface of cushion cap have can with the annular joint looks adaptation indent ring channel, the inside shear force key that is provided with of annular joint, the concrete filled steel tube festival section and the concrete filled steel tube festival section that are adjacent from top to bottom are connected through complex annular joint and concave ring channel between cushion cap.
Furthermore, the energy dissipation device is composed of a thinning steel plate and stiffening ribs welded with the two ends of the thinning steel plate, and the two ends of the energy dissipation device are respectively connected with the top surface of the bearing platform and the side surface of the steel pipe concrete segment through shear bolts.
Furthermore, the diameter of an inner ring of the annular joint is 1/3 of the diameter of the concrete column and is far larger than the diameter of the pre-stressed duct, the diameter of an outer ring of the annular joint is 2/3 of the diameter of the concrete column, and the height of the annular joint is not smaller than 1/5 of the diameter of the concrete column.
Furthermore, a groove is reserved in the middle of the bottom of the bearing platform, so that tensioning and anchoring of the prestressed tendons are facilitated.
Furthermore, the shear key is a CFRP solid rod with a circular cross section, and shear bolts are welded on the periphery of the outer side of the shear key.
The invention also comprises a prefabricated and assembled segment concrete-filled steel tube pier built with the additional energy dissipater, which is characterized by comprising the following steps of:
step one, manufacturing a geometric model of the annular joint according to design requirements in advance in work
Step two, fixedly connecting the annular joint model with the steel pipe;
step three, configuring a shear key and placing a PVC pipe in the steel pipe as a reserved prestressed duct according to requirements;
step four, pouring the fiber reinforced concrete into the steel pipe;
and fifthly, after natural curing for a period of time, removing the model, and connecting the prestressed tendons with the anchoring and welding energy dissipation device.
Furthermore, epoxy resin and concrete glue are coated on the surfaces of the adjacent concrete-filled steel tube segments to reinforce the connection, a fiber-reinforced mortar layer is arranged between the top surface of the bearing platform and the bottommost concrete-filled steel tube segment, the prestressed tendons are CFRP (carbon fiber reinforced plastics) prestressed tendons, and the concrete columns are formed by pouring fiber-reinforced concrete.
Compared with the prior art, the invention has the following beneficial effects: the concrete-filled tube pier designed by the invention is a prefabricated part and is manufactured in a factory, so that the construction quality and speed can be improved, and the field operation amount can be reduced. The vertical bearing capacity and the horizontal lateral resistance of the segment-assembled pier can be improved by utilizing the high performance of the steel pipe concrete, so that the defects of damage and the like of a plastic hinge area of the segment-assembled pier are avoided; the CFRP shear keys arranged in the annular joints can effectively increase the shearing resistance and the torsion resistance of the pier and the self-resetting capacity, the shear bolts welded on the outer sides of the shear keys can uniformly and stably transmit shearing force, and meanwhile, the energy dissipation device arranged on the bearing platform can control and reduce the displacement requirement of the pier under the action of horizontal loads such as earthquake and the like.
Drawings
Fig. 1 is a schematic diagram of an annular joint prefabricated assembled segment concrete filled steel tube pier with an additional energy dissipation device.
Fig. 2 is a construction diagram of a concrete filled steel tube segment.
Fig. 3 is a horizontal sectional view of a concrete filled steel tube segment.
Figure 4 is a schematic view of an energy dissipater.
Figure 5 is a horizontal cross-section of the dissipater.
Shown in the figure: the method comprises the following steps of 1-anchorage device, 2-prestressed tendon, 3-prestressed duct, 4-shear key, 5-concrete filled steel tube segment, 6-steel tube, 7-annular joint, 8-energy dissipation device, 9-bearing platform, 10-groove, 11-annular groove, 12-concrete column, 13-thinning steel plate, 14-stiffening rib and 15-shear bolt.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 5, the ring-shaped joint prefabricated and assembled segment concrete-filled steel tube pier with the additional energy dissipater comprises a bearing platform 9, a concrete-filled steel tube segment 5, a ring-shaped joint 7 and an energy dissipater 8; the concrete-filled steel tube segment 5 consists of a steel tube 6 and a concrete column 12 in the steel tube 6, and the steel tube 6 is sleeved outside the concrete column 12; and a prestressed duct 3 is reserved in the middle of the concrete column 12 of the concrete-filled steel tube segment 5, and the prestressed ribs 2 penetrating through the prestressed duct 3 are tensioned after the assembly is finished, so that the pier forms a firm whole.
The top of each prestressed tendon 2 is fixed through an anchorage device, joint structures with annular structures are arranged among the prefabricated concrete-filled steel tube segments 5 and among the bearing platform 9 and the prefabricated concrete-filled steel tube segments 5, the lower ends of the concrete-filled steel tube segments are annular joints, the upper ends of the concrete-filled steel tube segments and the upper surface of the bearing platform are provided with concave annular grooves which can be matched with the annular joints, shear keys 4 are arranged inside the annular joints, and the upper and lower adjacent concrete-filled steel tube segments and the concrete-filled steel tube segments are connected with the bearing platform through the matched annular joints and concave annular grooves; and an energy dissipation device 8 is arranged between the top surface of the bearing platform 9 and the side surface of the bottom of the prefabricated assembled pier.
Specifically, the diameter of the inner ring of the annular joint 7 is 1/3 of the diameter of the concrete filled steel tube segment and is far larger than the size of the pre-stressed duct 3, the diameter of the outer ring is 2/3 of the diameter of the concrete filled steel tube segment, and the height of the annular joint 7 is not smaller than 1/5 of the diameter of the concrete filled steel tube segment.
Specifically, the shear keys 4 are uniformly distributed and embedded in the annular connector 7, the shear keys 4 are CFRP solid rods with circular cross sections, and meanwhile, the shear bolts 15 are welded on the periphery of the outer side of each shear key 4. The shear key 4 made of CFRP (carbon fiber reinforced plastics) solid rod and CFRP (carbon fiber reinforced plastics) has higher specific stiffness, and the shear bolt 15 can increase the connecting strength after connection.
Specifically, a vertically through prestressed duct 3 is reserved at the center of the precast concrete filled steel tube segment 5 and the cast-in-place bearing platform 9, and in the embodiment, a groove 10 is reserved at the middle position of the bottom of the bearing platform 9, so that the prestressed reinforcement 2 can be conveniently tensioned and anchored. And after the assembly is finished, the prestressed tendons 2 are tensioned in the prestressed duct 3 through the anchorage device 1, so that the pier forms a firm whole.
Specifically, in this embodiment, the energy dissipation device 8 is composed of a thinned steel plate 13 and two end stiffeners 14 welded to the lower portion of the thinned steel plate 13, one end of the energy dissipation device 8 is connected to the top surface of the bearing platform 9 by shear bolts 15, and the other end of the energy dissipation device 8 is connected to the side surface of the precast concrete-filled steel tube segment 5 by shear bolts 15. The angle between the connecting line of the two ends of the energy dissipater 8 and the top surface of the bearing platform is between 30 and 60 degrees.
Specifically, the energy dissipaters 8 are uniformly distributed on four sides of the bottom of the prefabricated assembled pier, and the number of the energy dissipaters is four.
Specifically, epoxy resin and concrete glue are smeared on the surface between adjacent prefabricated steel pipe concrete segments 5 to strengthen the connection, a fiber reinforced mortar layer is arranged between the top surface of the bearing platform 9 and the end surface of the bottom of the prefabricated assembled pier, the prestressed reinforcement 2 adopts a prestressed CFRP reinforcement, and the concrete 12 adopts fiber reinforced concrete.
A construction method for an annular joint prefabricated and assembled segment concrete filled steel tube pier with an additional energy dissipation device comprises the following steps:
step one, manufacturing a geometric model of the annular joint according to design requirements in advance in work
Step two, fixedly connecting the annular joint model with the steel pipe;
step three, configuring a shear key and placing a PVC pipe in the steel pipe as a reserved prestressed duct according to requirements;
step four, pouring the fiber reinforced concrete into the steel pipe;
and fifthly, after natural curing for a period of time, removing the model, and connecting the prestressed tendons with the anchoring and welding energy dissipation device.
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.
In the description of this patent, it is to be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the patent, and are not intended to indicate or imply that the referenced devices or components must have the particular orientations, constructions and operations in the particular orientations, and therefore, are not to be considered limiting of the patent.
Meanwhile, if the invention as described above discloses or relates to parts or structural members fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (8)
1. The prefabricated assembled section concrete filled steel tube pier with the additional energy dissipation device is characterized by comprising a bearing platform and a pier which is positioned above the bearing platform and formed by longitudinally and fixedly connecting a plurality of concrete filled steel tube sections, wherein the concrete filled steel tube sections comprise concrete columns and steel tubes sleeved outside the concrete columns, a prestressed pore passage is reserved between each concrete filled steel tube section and the bearing platform, prestressed ribs are stretched in the prestressed pore passage to enable the pier to form a whole, and the energy dissipation device is arranged between the top surface of the bearing platform and the side surface of each concrete filled steel tube section at the bottom.
2. The prefabricated and assembled segment concrete-filled steel tube pier with the additional energy dissipater according to claim 1, wherein the lower end of the concrete-filled steel tube segment is provided with an annular joint, the upper end of the concrete-filled steel tube segment and the upper surface of the bearing platform are provided with concave annular grooves which can be matched with the annular joint, a shear key is arranged inside the annular joint, and the upper and lower adjacent concrete-filled steel tube segments and the concrete-filled steel tube segments are connected with the bearing platform through the matched annular joint and concave annular grooves.
3. The prefabricated assembled section concrete-filled steel tube pier with the additional energy dissipater according to claim 2, wherein the energy dissipater is composed of a thinned steel plate and stiffening ribs welded to two ends of the thinned steel plate, and two ends of the energy dissipater are connected with the top surface of the bearing platform and the side surface of the concrete-filled steel tube section through shear bolts.
4. An additional energy dissipater prefabricated spliced section concrete filled steel tube pier according to claim 2, wherein the diameter of the inner ring of the annular joint is 1/3 and is much larger than the diameter of the pre-stressed duct, the diameter of the outer ring is 2/3 of the diameter of the concrete column, and the height of the annular joint is not less than 1/5 of the diameter of the concrete column.
5. The prefabricated assembled section concrete-filled steel tube pier with the additional energy dissipater as claimed in claim 2, wherein a groove is reserved in the middle of the bottom of the bearing platform to facilitate tensioning and anchoring of prestressed tendons.
6. The prefabricated assembled section concrete filled steel tube pier with the additional energy dissipater as claimed in claim 2, wherein the shear key is a CFRP solid rod with a circular cross section, and shear bolts are welded around the outer side of the shear key.
7. A construction method for constructing the prefabricated assembled section concrete-filled steel tube pier with the additional energy dissipaters as claimed in any one of claims 1 to 6 is characterized by comprising the following steps:
step one, manufacturing a geometric model of the annular joint according to design requirements in advance in work
Step two, fixedly connecting the annular joint model with the steel pipe;
step three, configuring a shear key and placing a PVC pipe in the steel pipe as a reserved prestressed duct according to requirements;
step four, pouring the fiber reinforced concrete into the steel pipe;
and fifthly, after natural curing for a period of time, removing the model, and connecting the prestressed tendons with the anchoring and welding energy dissipation device.
8. The construction method of the precast assembled segment concrete-filled steel tube pier with the additional energy dissipater as claimed in claim 7, wherein epoxy resin and concrete glue are coated on the surfaces between the adjacent concrete-filled steel tube segments to reinforce the connection, a fiber reinforced mortar layer is arranged between the top surface of the bearing platform and the bottommost concrete-filled steel tube segment, the prestressed tendons are CFRP (carbon fiber reinforced plastics) and the concrete columns are formed by pouring fiber reinforced concrete.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011018159.8A CN111979904B (en) | 2020-09-24 | 2020-09-24 | Prefabricated assembled segment concrete filled steel tube pier with additional energy dissipation device and construction method thereof |
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| CN202011018159.8A CN111979904B (en) | 2020-09-24 | 2020-09-24 | Prefabricated assembled segment concrete filled steel tube pier with additional energy dissipation device and construction method thereof |
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| CN111979904A true CN111979904A (en) | 2020-11-24 |
| CN111979904B CN111979904B (en) | 2024-07-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113265942A (en) * | 2021-06-22 | 2021-08-17 | 宗杰 | T-shaped bridge damping method |
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| KR20080073279A (en) * | 2008-07-21 | 2008-08-08 | (주)대우건설 | Psc bridge pier assembled with precast concrete segments having steel duct and steel pipe and reinforcing bar, and constructing method thereof |
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| CN212426711U (en) * | 2020-09-24 | 2021-01-29 | 福州大学 | Prefabricated assembled segment concrete-filled steel tube pier with additional energy dissipation device |
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2020
- 2020-09-24 CN CN202011018159.8A patent/CN111979904B/en active Active
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| KR20080073279A (en) * | 2008-07-21 | 2008-08-08 | (주)대우건설 | Psc bridge pier assembled with precast concrete segments having steel duct and steel pipe and reinforcing bar, and constructing method thereof |
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| CN111979904B (en) | 2024-07-05 |
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