CN112694290A - Novel pier of high durability of anti multiple disaster kind - Google Patents
Novel pier of high durability of anti multiple disaster kind Download PDFInfo
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- CN112694290A CN112694290A CN202011640732.9A CN202011640732A CN112694290A CN 112694290 A CN112694290 A CN 112694290A CN 202011640732 A CN202011640732 A CN 202011640732A CN 112694290 A CN112694290 A CN 112694290A
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- Prior art keywords
- stainless steel
- strain
- composite material
- cement
- steel pipe
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- 239000004568 cement Substances 0.000 claims abstract description 51
- 239000002131 composite material Substances 0.000 claims abstract description 48
- 239000010935 stainless steel Substances 0.000 claims abstract description 45
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 45
- 239000000835 fiber Substances 0.000 claims description 16
- 229920002748 Basalt fiber Polymers 0.000 claims description 12
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 12
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 12
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 239000010881 fly ash Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 3
- 238000007580 dry-mixing Methods 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 229910021487 silica fume Inorganic materials 0.000 claims 2
- 239000000203 mixture Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 7
- 238000004880 explosion Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 239000011863 silicon-based powder Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
本发明属于土木工程中的结构工程领域，特别涉及一种抗多灾种高耐久性新型桥墩。本发明由外部不锈钢管和内填的应变强化水泥基复合材料组成。不锈钢管内壁通过焊接栓钉或抗剪连接件来加强不锈钢管与内填的应变强化水泥基复合材料之间的粘结作用，使二者可以协调工作、共同受力形成组合桥墩。本发明的有益效果是合理利用不锈钢管和应变强化水泥基复合材料的材料特性，使该种新型桥墩具有优秀的对地震、火灾、冲击、爆炸等不同灾种的抵抗能力，且由于外部不锈钢管的存在，使其耐久性能优越。该类桥墩特别适用于大跨度的跨海、跨江桥梁或地震多发区的公路、铁路桥梁等。
The invention belongs to the field of structural engineering in civil engineering, and particularly relates to a new type of bridge pier with multi-hazard resistance and high durability. The present invention consists of an outer stainless steel tube and an inner filled strain-strengthened cement-based composite material. The inner wall of the stainless steel pipe is welded with studs or shear connectors to strengthen the bonding between the stainless steel pipe and the strain-strengthened cement-based composite material filled in it, so that the two can work in harmony and form a composite pier under joint force. The beneficial effect of the invention is that the material properties of the stainless steel pipe and the strain-strengthened cement-based composite material are rationally utilized, so that the new bridge pier has excellent resistance to different disasters such as earthquake, fire, impact, explosion, etc. The existence of it makes it superior in durability. This type of bridge pier is especially suitable for long-span sea-crossing, river-crossing bridges or highway and railway bridges in earthquake-prone areas.
Description
Technical Field
The invention belongs to the field of structural engineering in civil engineering, and particularly relates to a novel bridge pier with multiple disaster resistance and high durability.
Background
The bridge structure is an important infrastructure project, and how to ensure the safety of the bridge under the action of extreme load is more and more concerned by relevant departments and bridge engineers in the design process, but the collapse of the bridge still happens occasionally, which causes great harm to the society and the people. Most of the catastrophic bridge collapse accidents are not caused by the quality problems of the bridge structure itself but by external extreme disasters such as the scouring of rivers, the collision of tank cars against piers, earthquakes, the driving of overweight vehicles on bridges, and the terrorist attacks such as explosion. Damage to each part of the bridge structure affects the overall performance of the bridge, but the damage to the bridge pier, which is a critical component for supporting the superstructure of the bridge, is undoubtedly the most serious. The existing bridge pier type and the used materials have potential safety hazards under extreme disasters, and the whole bridge structure can collapse, so that a novel bridge pier capable of effectively improving the safety and the durability of the bridge is urgently needed. The stainless steel has excellent corrosion resistance, impact resistance and fire resistance, is simple to maintain, and has better shock resistance, impact resistance and explosion resistance compared with common carbon steel; the strain-reinforced cement-based composite material is a general name of a super-toughness fiber-reinforced cement-based composite material, has excellent energy absorption performance and impact resistance, has wide application prospect in civil engineering structures, and can improve the anti-seismic performance of piers by adopting the strain-reinforced cement-based composite material when large-span bridges are built. The basalt fiber can improve the tensile strength of the composite material, the polyvinyl alcohol fiber can improve the tensile strain of the material, and the blending of the basalt fiber and the polyvinyl alcohol fiber into the strain-reinforced cement-based composite material can improve the initial crack strength of the material by 30 percent, thereby being beneficial to maintenance and reducing the manufacturing cost. The stainless steel and the strain-reinforced cement-based composite material are suitable for being used in bridge structures, particularly piers, due to the respective material characteristics of the stainless steel and the strain-reinforced cement-based composite material, the strain-reinforced cement-based composite material is filled in stainless steel tubes to form a novel pier which is resistant to multiple disasters and high in durability, the pier can obviously improve the capability of the bridge structures in resisting extreme disasters (such as earthquake, vehicle or ship collision, corrosion, typhoon, fire and explosion), and along with the rapid development of bridge construction industry in China, the application of the novel pier inevitably improves the safety of the bridge structures and generates good economic benefits and social benefits.
Disclosure of Invention
The invention aims to provide a novel pier with high durability and multiple disaster resistance. The pier is particularly suitable for large-span sea-crossing bridges, river-crossing bridges or highways, railway bridges and the like in earthquake-prone areas.
The novel bridge pier with the disaster resistance and the high durability consists of an external stainless steel pipe and a strain-reinforced cement-based composite material filled in the external stainless steel pipe.
The inner wall of the stainless steel pipe is welded with studs or shear connectors to strengthen the bonding effect between the stainless steel pipe and the strain-strengthened cement-based composite material filled in the stainless steel pipe. The two can work in coordination and bear force together to form the combined pier.
The cross section of the stainless steel pipe is in a shape of a circle, a square, a rectangle, an ellipse or a round end.
The preparation method of the strain-strengthened cement-based composite material comprises the following steps: dry-mixing cement, fly ash and silicon powder for 1-3 minutes, then adding water and a water reducing agent, mixing for 2-5 minutes to obtain a uniform matrix, regulating the water-cement ratio to be 0.18, and finally adding fibers, and uniformly mixing; wherein the mass ratio of the cement, the fly ash, the silicon powder and the water reducing agent is 1:5:1:0.006, the fibers are polyvinyl alcohol fibers and basalt fibers, the doping amount of the polyvinyl alcohol fibers is 0-2 wt%, and the doping amount of the basalt fibers is 0-2 wt%.
The invention has the beneficial effects that:
(1) the stainless steel pipe has excellent corrosion resistance, impact resistance and fire resistance, is easy to maintain, can obviously reduce the cost of spraying the anticorrosive paint, and reduces the overall cost of the bridge.
(2) The strain-reinforced cement-based composite material has remarkable tensile strain reinforcing capacity, excellent energy absorption performance and impact resistance, and can improve the seismic performance and the impact resistance of the pier. The tensile strength of the composite material is improved by using the basalt fibers, the tensile strain of the material can be improved by using the polyvinyl alcohol fibers, and the initial crack strength of the composite material can be improved by 30% by using the basalt fibers and the polyvinyl alcohol fibers in a mixed manner, so that the composite material is favorable for maintenance and the manufacturing cost is reduced.
(3) The material characteristics of the stainless steel pipe and the strain-strengthened cement-based composite material are reasonably utilized, the composite material has excellent resistance to different disasters such as earthquake, fire, impact, explosion and the like, and the durability of the composite material is excellent due to the existence of the external stainless steel pipe.
Drawings
FIG. 1 is a high-durability pier elevation view against various disasters;
FIG. 2 is a cross-sectional view of a novel round multi-disaster resistant high-durability bridge pier;
FIG. 3 is a cross-sectional view of a square disaster-resistant high-durability novel bridge pier;
FIG. 4 is a cross-sectional view of a rectangular disaster-resistant high-durability novel bridge pier;
FIG. 5 is a cross-sectional view of an elliptical multi-disaster resistant high-durability novel bridge pier;
fig. 6 is a cross-sectional view of a novel pier with a round end shape, which is resistant to various disasters and high in durability;
FIG. 7 is a vertical view of a novel pier with studs for disaster resistance and high durability;
fig. 8 is a cross-sectional view of a novel pier with round pins and high durability against various disasters;
fig. 9 is a cross-sectional view of a square-shaped disaster-resistant high-durability novel pier provided with studs;
fig. 10 is a cross-sectional view of a rectangular disaster-resistant high-durability novel pier provided with studs;
fig. 11 is a cross-sectional view of an elliptical multi-disaster resistant high-durability novel pier provided with studs;
fig. 12 is a cross-sectional view of a round-ended pier provided with studs and resistant to various disasters and high durability;
FIG. 13 is an elevation view of a novel pier with longitudinal stiffeners and high durability against various disasters;
fig. 14 is a cross-sectional view of a novel pier with a round shape and longitudinal stiffening ribs for resisting various disasters and high durability;
fig. 15 is a cross-sectional view of a novel pier with a square shape and longitudinal stiffening ribs for resisting various disasters and high durability;
fig. 16 is a cross-sectional view of a novel pier with longitudinal stiffening ribs arranged in a rectangular shape and high durability against various disasters;
fig. 17 is a cross-sectional view of a novel pier with oval longitudinal stiffening ribs for resisting various disasters and high durability;
fig. 18 is a cross-sectional view of a novel pier with a round end shape provided with longitudinal stiffening ribs and high durability against various disasters;
wherein: 1-stainless steel pipe, 2-strain reinforced cement-based composite material, 3-stud and 4-longitudinal stiffening rib.
Detailed Description
The present invention provides a novel pier with high durability against various disasters, and the structure and the specific implementation of the present invention will be further described with reference to the following embodiments, but the present invention is not limited to the following embodiments.
Example 1
The novel pier structure with multiple disaster resistance and high durability comprises a stainless steel pipe, a strain-reinforced cement-based composite material and a shear connector, wherein the strain-reinforced cement-based composite material is filled in the steel pipe, and the shear connector is welded on the inner wall of the steel pipe to reinforce the bonding effect between the stainless steel pipe and the strain-reinforced cement-based composite material.
The section of the stainless steel pipe is circular.
The inner wall of the stainless steel pipe is a common smooth inner wall.
The filler is a strain-strengthened cement-based composite material.
The strain-reinforced cement-based composite material is prepared from ordinary cement, fly ash, silicon powder and a water reducing agent in a mass ratio of 1:5:1:0.006, a water-cement ratio of 0.18, 1.5% of polyvinyl alcohol fibers and 0% of basalt fibers.
The construction method of the novel bridge pier structure with the disaster resistance and high durability comprises the following specific steps: 1) hoisting the stainless steel pipe to the abutment and stably connecting the stainless steel pipe with the abutment; 2) and filling the stainless steel pipe with a strain-reinforced cement-based composite material to complete the construction of the pier.
Example 2
The novel pier structure with multiple disaster resistance and high durability comprises a stainless steel pipe, a strain-reinforced cement-based composite material and a shear connector, wherein the strain-reinforced cement-based composite material is filled in the steel pipe, and the shear connector is welded on the inner wall of the steel pipe to reinforce the bonding effect between the stainless steel pipe and the strain-reinforced cement-based composite material.
The cross section of the stainless steel pipe is square.
And the inner wall of the stainless steel pipe is welded with a stud.
The filler is a strain-strengthened cement-based composite material.
The strain-strengthened cement-based composite material is prepared from ordinary cement, fly ash, silicon powder and a water reducing agent in a mass ratio of 1:5:1:0.006, a water-cement ratio of 0.18, 1.5% of polyvinyl alcohol fibers and 0.5% of basalt fibers.
The construction method of the novel bridge pier structure with the disaster resistance and high durability comprises the following specific steps: 1) welding studs on the inner wall of the stainless steel pipe; 2) hoisting the stainless steel pipe with the welded stud to the abutment and stably connecting the stainless steel pipe with the abutment; 3) and filling the stainless steel pipe with a strain-reinforced cement-based composite material to complete the construction of the pier.
Example 3
The novel pier structure with multiple disaster resistance and high durability comprises a stainless steel pipe, a strain-reinforced cement-based composite material and a shear connector, wherein the strain-reinforced cement-based composite material is filled in the steel pipe, and the shear connector is welded on the inner wall of the steel pipe to reinforce the bonding effect between the stainless steel pipe and the strain-reinforced cement-based composite material.
The section of the stainless steel pipe is rectangular.
And longitudinal stiffening ribs are welded on the inner wall of the stainless steel pipe.
The filler is a strain-strengthened cement-based composite material.
The strain-strengthened cement-based composite material is prepared from ordinary cement, fly ash, silicon powder and a water reducing agent in a mass ratio of 1:5:1:0.006, a water-cement ratio of 0.18, 0.5% of polyvinyl alcohol fibers and 1.5% of basalt fibers.
The construction method of the novel bridge pier structure with the disaster resistance and high durability comprises the following specific steps: 1) welding longitudinal stiffening ribs on the inner wall of the stainless steel pipe; 2) hoisting the stainless steel pipe welded with the longitudinal stiffening ribs onto the abutment and stably connecting the stainless steel pipe with the abutment; 3) and filling the stainless steel pipe with a strain-reinforced cement-based composite material to complete the construction of the pier.
The results of the performance tests on the strain-strengthened cement-based composite materials obtained in examples 1 to 3 are shown in the following table. As can be seen from the table: the early strength of the strain-reinforced cement-based composite material is high, the 28d compressive strength is higher than 35MPa, the tensile strength of the composite material is improved by the doping of basalt fibers, and the tensile strain of the composite material is improved by the doping of polyvinyl alcohol fibers.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011640732.9A CN112694290A (en) | 2020-12-31 | 2020-12-31 | Novel pier of high durability of anti multiple disaster kind |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011640732.9A CN112694290A (en) | 2020-12-31 | 2020-12-31 | Novel pier of high durability of anti multiple disaster kind |
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| CN112694290A true CN112694290A (en) | 2021-04-23 |
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| CN202011640732.9A Pending CN112694290A (en) | 2020-12-31 | 2020-12-31 | Novel pier of high durability of anti multiple disaster kind |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888946A (en) * | 2012-11-04 | 2013-01-23 | 西安建筑科技大学 | Steel pipe high-elongation fiber concrete combined column |
| CN104197117A (en) * | 2014-08-18 | 2014-12-10 | 江苏中冶能源设备制造有限公司 | Large-caliber composite steel tube with observation hole |
| CN107382183A (en) * | 2017-06-29 | 2017-11-24 | 昆明理工大学 | A kind of high tenacity cement-base composite material |
| CN108360748A (en) * | 2018-01-18 | 2018-08-03 | 湖北工程学院 | A kind of composite steel tube UHPC damping stubs |
| CN108608557A (en) * | 2018-04-26 | 2018-10-02 | 华侨大学 | A kind of superhigh tenacity concrete shaped steel composite structure and construction method |
| CN110847160A (en) * | 2019-12-12 | 2020-02-28 | 福州大学 | Integral bridge pile foundation structure using ECC concrete and its construction method |
| CN111943594A (en) * | 2020-08-14 | 2020-11-17 | 东南大学 | High-ductility self-recovery cement-based combined column |
-
2020
- 2020-12-31 CN CN202011640732.9A patent/CN112694290A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888946A (en) * | 2012-11-04 | 2013-01-23 | 西安建筑科技大学 | Steel pipe high-elongation fiber concrete combined column |
| CN104197117A (en) * | 2014-08-18 | 2014-12-10 | 江苏中冶能源设备制造有限公司 | Large-caliber composite steel tube with observation hole |
| CN107382183A (en) * | 2017-06-29 | 2017-11-24 | 昆明理工大学 | A kind of high tenacity cement-base composite material |
| CN108360748A (en) * | 2018-01-18 | 2018-08-03 | 湖北工程学院 | A kind of composite steel tube UHPC damping stubs |
| CN108608557A (en) * | 2018-04-26 | 2018-10-02 | 华侨大学 | A kind of superhigh tenacity concrete shaped steel composite structure and construction method |
| CN110847160A (en) * | 2019-12-12 | 2020-02-28 | 福州大学 | Integral bridge pile foundation structure using ECC concrete and its construction method |
| CN111943594A (en) * | 2020-08-14 | 2020-11-17 | 东南大学 | High-ductility self-recovery cement-based combined column |
Non-Patent Citations (2)
| Title |
|---|
| 中国城市轨道交通协会单轨分会: "《中国单轨交通发展研究报告 2018》", 31 July 2019, 北京：中国铁道出版社 * |
| 曹海琳等: "《玄武岩纤维》", 30 November 2017, 北京：国防工业出版社 * |
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Application publication date: 20210423 |
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