CN105696457A - Pier energy consumption and anti-crushing structure with replaceable composite board built-in energy consumption steel boards - Google Patents
Pier energy consumption and anti-crushing structure with replaceable composite board built-in energy consumption steel boards Download PDFInfo
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- CN105696457A CN105696457A CN201610108438.0A CN201610108438A CN105696457A CN 105696457 A CN105696457 A CN 105696457A CN 201610108438 A CN201610108438 A CN 201610108438A CN 105696457 A CN105696457 A CN 105696457A
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- uhpc
- wasted
- steel plate
- bridge pier
- energy consumption
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- 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
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- Civil Engineering (AREA)
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Abstract
The invention provides a pier energy consumption and anti-crushing structure with replaceable composite board built-in energy consumption steel boards. According to the structure, each of the four edges of a pier bottom section is provided with two overlapped ultra high performance concrete (UHPC) boards, and a pipeline is reserved between every two corresponding UHPC boards for containing the corresponding energy consumption steel board; finish rolled thread reinforcing steel bars transversely penetrate the UHPC boards and the pier bottom section and are anchored through high-strength nuts and steel pads, and prestress is applied through the finish rolled thread reinforcing steel bars, so that the UHPC boards and the pier bottom section are combined into a whole; the energy consumption steel boards are connected with embedded steel rods in an upper section and a bearing platform through reserved holes in the ends; and rubber pad layers need to be arranged between the pier bottom section and the upper section and between the UHPC boards and the upper section. The pier energy consumption and anti-crushing structure is used for treating a dry joint section spliced pier, it can be guaranteed that the pier has the good energy consumption capacity under the stimulation of an earthquake, the bottom section can be prevented from being severely crushed, the pier can be rapidly repaired through replacement of the UHPC boards and the energy consumption steel boards after the earthquake, the use function of a bridge is restored in time, and the influences caused by the earthquake on traffic are reduced.
Description
Technical field
The present invention relates to middle highly seismic region bridge rapid construction technology and Seismic Design Method, particularly to section assembling technology, external prestressing technique with utilize the damper technology that metal material consumes energy, belong to field of civil engineering。
Background technology
Stem grafting seam section assembling bridge pier, because having advantage and the self-resetting capability of rapid construction, obtains engineer applied in some including port Zhuhai and Macao bridge and Canadian Federal bridge in the bridge spanning the sea of river。The bridge pier of this form is that pier shaft is vertically divided into some sections, Reinforcement disconnects at segmental joints place, " stem grafting seam " is adopted to connect between sections, or the durability of bridge pier is improved at seam crossing filling epoxy resin, then adopt the mode of post-tensioned prestressing that sections is connected into entirety。Chinese scholars is found by experimental and theoretical study, and stem grafting seam section assembling bridge pier energy dissipation capacity under seismic stimulation is poor, and easily crushes in coxopodite section。
For improving the energy dissipation capacity of stem grafting seam section assembling bridge pier, the method employed up in engineering practice and scientific research at present is to stitch built-in power consumption reinforcing bar in section assembling bridge pier at stem grafting。Although this method can improve the energy dissipation capacity of bridge pier, but can cause that the residual deformation of shake rear abutment increases simultaneously, simultaneously built-in power consumption reinforcing bar is not easy to change after shake。
For stem grafting stitch section assembling bridge pier seismic stimulation go to the bottom sections hold squashy problem, applying maximum methods in engineering is that coxopodite section concrete is increased constraint to improve concrete deformability, including increasing stirrup consumption in coxopodite section concrete, using concrete filled steel tube to make coxopodite section or at coxopodite section concrete outer wrap FRP, this method can actually alleviate coxopodite section degree of injury under seismic stimulation, but the concrete of damage there is also shake after not easily changeable problem。
Summary of the invention
Technical problem: it is an object of the invention to provide one and utilize replaceable ultra-high performance concrete (UltraHighPerformanceConcrete, UHPC) bridge pier of the built-in Wasted-energy steel plate of plate consumes energy and anti-crushed structure, the replaceable built-in Wasted-energy steel plate of UHPC plate is utilized to crush to improve stem grafting seam section assembling bridge pier energy dissipation capacity under geological process encourages and anti-crushed coxopodite section, this method is used to be possible not only to improve stem grafting seam section assembling bridge pier energy dissipation capacity and prevent coxopodite section from crushing under seismic stimulation, and can quickly repair impaired bridge pier by changing impaired UHPC plate and wherein built-in Wasted-energy steel plate after shake, recover the use function of bridge in time。
Technical scheme: the present invention is the bridge pier power consumption of a kind of built-in Wasted-energy steel plate of replaceable composite plate and anti-crushed structure, and this structure respectively arranges two blocks of UHPC plates being superimposed on four limits of bridge pier coxopodite section, and between two blocks of UHPC plates, preserved pipeline is used for placing Wasted-energy steel plate；Finish rolling deformed bar is horizontally through described UHPC plate and bridge pier coxopodite section, is anchored by high-strength nut and steel plate washer, combines both into entirety by finish rolling deformed bar Shi Hanzhang；Described Wasted-energy steel plate is connected with upper segment respectively through the pre-buried rod iron of cushion cap by end reserving hole；Need to arrange rubber spacer between described bridge pier coxopodite section and UHPC plate and upper segment, prevent under geological process encourages owing to the collision of bridge pier coxopodite section causes upper segment to damage, upper segment, to increase wall thickness with bridge pier coxopodite section seam crossing, is gradually reduced to wall thickness。
Pre-buried steel stick end diameter is slightly less than the reserving hole diameter of Wasted-energy steel plate end, and Wasted-energy steel plate, more than power consumption central layer end reserving hole diameter, is fixed by remainder diameter by nut。
Wherein:
Described Wasted-energy steel plate end arranges ribbed stiffener。
The inside dimension of described preserved pipeline is slightly larger than the outside dimension of Wasted-energy steel plate。
Described UHPC plate uses the UHPC mixing micro steel fiber to make。
Beneficial effect: the present invention contrasts prior art and has the advantage that
1. this invention adopts capacity protection principle to be easily separated with protected district by vulnerable zone; utilize finish rolling deformed bar Shi Hanzhang using integral with the inner bottom sections as protected district for the UHPC plate as vulnerable zone; loosening and stretch-draw again of finish rolling deformed bar can be passed through, it is achieved the quick-replaceable to impaired UHPC plate after shake。
2. vulnerable zone adopts UHPC plate, it is possible to the character of " split and not broken " that make full use of that UHPC has because of mixing of steel fiber and the corrosion resistant character having because structure is closely knit。
3. it is respectively provided with two blocks of replaceable UHPC plates on bridge pier coxopodite section four limit, preserved pipeline for placing Wasted-energy steel plate is arranged between two blocks of UHPC plates, Wasted-energy steel plate is observed after not only improving shake and changes by such way, is also beneficial to prevent Wasted-energy steel plate corrosion。
4. Wasted-energy steel plate outside dimension to be slightly smaller than the size of preserved pipeline, the UHPC of pipeline is prevented from Wasted-energy steel plate and buckling failure occurs when pressurized, Wasted-energy steel plate upper, lower end is connected with the pre-buried rod iron in upper segment and cushion cap respectively by end reserving hole, pre-buried rod iron and reserving hole linkage section diameter are less than reserving hole diameter, remainder diameter is more than reserving hole diameter, so only nut need to be used just to be fixed Wasted-energy steel plate end in outside, the construction space needed is little, not only improve the replacing to Wasted-energy steel plate after shake, also ensure that Wasted-energy steel plate can Free Transform under geological process encourages。
5. need to arrange rubber spacer between stem grafting seam section assembling bridge pier coxopodite section and UHPC plate and upper segment, prevent under geological process excitation owing to the collision of coxopodite section causes upper segment to damage, this ensures that there the contingent damage of bridge pier and only concentrate on removable UHPC plate, recover the use function of bridge after being conducive to shake in time, gain time for earthquake relief work。
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention structural section；
Fig. 2 is embodiment of the present invention structure top view；
Fig. 3 is Wasted-energy steel plate structural map in the embodiment of the present invention。
Number in the figure illustrates: 1-bridge pier coxopodite section, 2-UHPC plate, 3-preserved pipeline, 4-Wasted-energy steel plate, 5-ribbed stiffener, 6-finish rolling deformed bar, 7-high-strength nut, 8-steel plate washer, 9-end reserving hole, 10-upper segment, the pre-buried rod iron of 11-, 12-nut and 13-rubber spacer。
Detailed description of the invention
The present invention is a kind of structure by utilizing the replaceable built-in Wasted-energy steel plate of UHPC plate to improve stem grafting seam section assembling bridge pier energy dissipation capacity under geological process encourages and the crushing of anti-crushed coxopodite section, and this structure needs to use replaceable UHPC plate, Wasted-energy steel plate, finish rolling deformed bar, nut, high-strength nut, steel plate washer, pre-buried rod iron and rubber spacer。
Described replaceable UHPC plate is respectively provided with two pieces on bridge pier coxopodite section four limit, and preserved pipeline between two blocks of UHPC plates is used for placing Wasted-energy steel plate, is symmetric with bridge pier center by described pipeline。
Described replaceable UHPC plate and inner bottom sections are combined into entirety by finish rolling deformed bar Shi Hanzhang, by calculating the thickness obtaining replaceable UHPC plate, UHPC is utilized to have the character of " splitting and not broken " because of mixing of steel fiber, after ensureing shake, replaceable UHPC plate only occurs local damage occurrence of large-area to crush, inner bottom sections still remains intact simultaneously, enough support top dead load and connect different segment institute Shi Hanzhang, can quick-recovery bridge pier soon by changing UHPC plate after shaking。
Described preserved pipeline is slightly larger in dimension than the outside dimension of Wasted-energy steel plate, wherein Wasted-energy steel plate upper and lower end is connected with the pre-buried rod iron in upper segment and cushion cap respectively by end reserving hole, pre-buried steel stick end diameter is slightly less than the reserving hole diameter of Wasted-energy steel plate end, remainder diameter is then more than reserving hole diameter, pre-buried rod iron traverse reserving hole, then side, Wasted-energy steel plate end props up pre-buried rod iron diameter increases section, and opposite side uses nut to be fixed by Wasted-energy steel plate。Stem grafting seam section assembling bridge pier can wave in the horizontal direction under geological process encourages, Wasted-energy steel plate is made to be subject to tension and compression repeatedly and elastic-plastic deformation occurs, reach the purpose of power consumption, wherein the UHPC of pipeline is prevented from Wasted-energy steel plate generation buckling failure, micro-pore is left, it is ensured that Wasted-energy steel plate has certain expansion space when pressurized between power consumption rod iron and surrounding UHPC。
The described pipeline in replaceable UHPC plate and Wasted-energy steel plate are 12。
Need to arrange rubber spacer between stem grafting seam section assembling bridge pier coxopodite section and UHPC plate and upper segment, it is prevented that owing to the collision of coxopodite section causes upper segment to damage under geological process excitation。Upper segment, to increase wall thickness with coxopodite section seam crossing, is gradually reduced to wall thickness, and when changing UHPC plate successively after so can ensure that shake, bridge pier remains to effectively top dead load and prestressing force be passed to cushion cap。
The invention provides a kind of by utilizing the replaceable built-in Wasted-energy steel plate of UHPC plate to improve stem grafting seam section assembling bridge pier energy dissipation capacity under geological process encourages and the structure (such as Fig. 1) preventing coxopodite section from crushing, the described pipeline in replaceable UHPC plate and Wasted-energy steel plate are 12。
The process that the present invention is embodied as is as follows:
Step 1: stem grafting is stitched each sections of section assembling bridge pier and is transported to job site from precast plant, each sections vertically place in order on cushion cap errorless after, upper segment 10 bottom surface has bondd rubber spacer 13, by post-tensioned prestressing, each sections is connected into entirety；
Step 2: be sequentially placed one block of UHPC plate 2 (such as Fig. 2) on coxopodite section 1 four limit；
Step 3: Wasted-energy steel plate 4 is placed on the groove of UHPC plate 2, and is connected with the pre-buried rod iron 11 in upper segment 10 and cushion cap respectively with nut 12 by end reserving hole 9；
Step 4: be sequentially placed another block UHPC plate 2 (such as Fig. 2) on coxopodite section 1 four limit, two blocks of UHPC plates 2 align at preserved pipeline 3 place, and now Wasted-energy steel plate 4 is just in preserved pipeline 3；
Step 5: by finish rolling deformed bar 6 through the duct being reserved on coxopodite section 1 and UHPC plate 2, according to regulation about stretch-draw finish rolling deformed bar 6 in " highway bridge and culvert construction technique normalizing " (JTG/TF50-2011), utilize relevant device to finish rolling deformed bar 6 Shi Hanzhang, and use high-strength nut 7 and steel plate washer 8 to its anchoring。
In the present embodiment, the UHPC plate 2 described in step 2 is made by the UHPC mixing micro steel fiber, and UHPC plate 2 thickness is obtained by calculating, to ensure that inner bottom sections 1 does not occur damage for calculating principle。
In the present embodiment, in UHPC plate 2 described in step 3, preserved pipeline 3 and Wasted-energy steel plate 4 are 12, preserved pipeline 3 is slightly larger in dimension than the outside dimension of Wasted-energy steel plate 4, when stem grafting stitches the occurred level deformation under geological process encourages of section assembling bridge pier, whole Wasted-energy steel plate 4 can Free Transform, give full play to energy dissipation capacity。
Although as it has been described above, represented and described the present invention with reference to specific preferred embodiment, but it shall not be construed as the restriction to the present invention self。Under the spirit and scope of the present invention premise defined without departing from claims, it can be made a variety of changes in the form and details。
Claims (5)
1. the bridge pier of the built-in Wasted-energy steel plate of replaceable composite plate consumes energy and anti-crushed structure, it is characterized in that, this structure respectively arranges two blocks of UHPC plates (2) being superimposed on four limits of bridge pier coxopodite section (1), and between two pieces of UHPC plates (2), preserved pipeline (3) is used for placing Wasted-energy steel plate (4)；Finish rolling deformed bar (6) is horizontally through described UHPC plate (2) and bridge pier coxopodite section (1), anchored by high-strength nut (7) and steel plate washer (8), combine both into entirety by finish rolling deformed bar (6) Shi Hanzhang；Described Wasted-energy steel plate (4) is connected with the pre-buried rod iron (11) in upper segment (10) and cushion cap respectively by end reserving hole (9)；Need to arrange rubber spacer (13) between described bridge pier coxopodite section (1) and UHPC plate (2) and upper segment (10), prevent under geological process encourages owing to the collision of bridge pier coxopodite section (1) causes upper segment (10) to damage, upper segment (10), to increase wall thickness with bridge pier coxopodite section (1) seam crossing, is gradually reduced to wall thickness。
2. the bridge pier of the built-in Wasted-energy steel plate of replaceable composite plate according to claim 1 consumes energy and anti-crushed structure, it is characterised in that described Wasted-energy steel plate (4) end arranges ribbed stiffener (5)。
3. the bridge pier of the built-in Wasted-energy steel plate of replaceable composite plate according to claim 1 consumes energy and anti-crushed structure, it is characterised in that the inside dimension of described preserved pipeline (3) is slightly larger than the outside dimension of Wasted-energy steel plate (4)。
4. the bridge pier of the built-in Wasted-energy steel plate of replaceable composite plate according to claim 1 consumes energy and anti-crushed structure, it is characterised in that described UHPC plate (2) uses the UHPC mixing micro steel fiber to make。
5. the bridge pier of the built-in Wasted-energy steel plate of replaceable composite plate according to claim 1 consumes energy and anti-crushed structure, it is characterized in that, described pre-buried rod iron (11) end diameter is slightly less than reserving hole (9) diameter of Wasted-energy steel plate (4) end, Wasted-energy steel plate (4), more than the diameter of power consumption central layer (4) end reserving hole (9), is fixed by remainder diameter by nut (12)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610108438.0A CN105696457B (en) | 2016-02-26 | 2016-02-26 | Bridge pier power consumption and the anti-crushed structure of Wasted-energy steel plate built in replaceable composite plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610108438.0A CN105696457B (en) | 2016-02-26 | 2016-02-26 | Bridge pier power consumption and the anti-crushed structure of Wasted-energy steel plate built in replaceable composite plate |
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| CN105696457A true CN105696457A (en) | 2016-06-22 |
| CN105696457B CN105696457B (en) | 2017-08-25 |
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| CN109989340A (en) * | 2019-05-06 | 2019-07-09 | 卫军 | A kind of anti-ship collision device of built-in frame structure |
| CN111041978A (en) * | 2019-12-11 | 2020-04-21 | 郑州第二市政建设集团有限公司 | Anti-seismic pier column structure |
| CN113373801A (en) * | 2021-06-30 | 2021-09-10 | 青岛理工大学 | But earthquake back quick replacement's prefabricated pier plasticity hinge structure |
| CN114319072A (en) * | 2021-12-09 | 2022-04-12 | 东南大学 | Hydraulic energy consumption device for self-resetting pier, anti-seismic system and construction method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113373801A (en) * | 2021-06-30 | 2021-09-10 | 青岛理工大学 | But earthquake back quick replacement's prefabricated pier plasticity hinge structure |
| CN114319072A (en) * | 2021-12-09 | 2022-04-12 | 东南大学 | Hydraulic energy consumption device for self-resetting pier, anti-seismic system and construction method |
| CN114319072B (en) * | 2021-12-09 | 2024-05-03 | 东南大学 | Hydraulic energy consumption device for self-resetting bridge pier, earthquake-resistant system and construction method |
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| CN105696457B (en) | 2017-08-25 |
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