CN211057596U - Corrugated steel pipe reinforced concrete-filled steel tube pier - Google Patents
Corrugated steel pipe reinforced concrete-filled steel tube pier Download PDFInfo
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- CN211057596U CN211057596U CN201921537421.2U CN201921537421U CN211057596U CN 211057596 U CN211057596 U CN 211057596U CN 201921537421 U CN201921537421 U CN 201921537421U CN 211057596 U CN211057596 U CN 211057596U
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Abstract
The utility model discloses a ripple steel pipe reinforcing type steel pipe concrete pier, including ripple composite pipe (1), UHPC concrete (2), steel pipe (3), four parts outside-in of core concrete (4) constitute jointly, ripple composite pipe (1) and UHPC concrete (2) are located reinforced (5) of steel pipe concrete pier bottom, ripple composite pipe (1) is by interior ripple steel pipe (11), rubber layer (12), outer ripple steel pipe (13) three part constitutes, UHPC concrete (2) are filled and are full of in the clearance between ripple composite pipe (1) and steel pipe (3), core concrete (4) are filled in the inside of steel pipe (3). The utility model overcomes the defect that well-known steel pipe concrete structure exists can effectively restrain bottom steel pipe bucking, has the bearing capacity height, and the ductility is good, and damping performance is good, especially has excellent anti-seismic performance and good ability of absorbing the vibration load energy under effects such as horizontal bridge wind load, earthquake load.
Description
Technical Field
The utility model belongs to the technical field of the building and construction structure, concretely relates to concrete filled steel tube bridge pier, especially a corrugated steel pipe reinforcing type concrete filled steel tube bridge pier.
Background
With the development of the traffic industry of China, a large number of high-speed railways, highways, sea-crossing bridges and the like are put into construction and use. In an earthquake-proof high-intensity region, in order to ensure the safety of a bridge structure, the bridge pier is used as an important bearing member, not only bears the load transmitted by an upper structure, but also transmits the load and the self weight to a foundation through the foundation, the structural safety of the bridge pier is very important, and the bridge pier has very high requirements on the earthquake-proof performance. The traditional bridge pier is mainly made of reinforced concrete, the bearing capacity and the ductility of the traditional bridge pier are poor, the traditional bridge pier is easy to damage under the action of strong shock, and the traditional bridge pier is extremely difficult to repair when being damaged.
In recent years, a general concrete filled steel tube pier is widely used in a bridge structure due to its good seismic performance and convenient construction. However, a large number of researchers at home and abroad indicate that under the action of transverse bridge wind load, earthquake load and the like, shear force and bending moment at the bottom of the steel tube concrete pier are large, a steel tube at the bottom of the pier is in a local buckling failure mode, ductility of a steel tube concrete structure is reduced, buckling is difficult to repair, once the steel tube is buckled, constraint force is limited to a fixed value due to the elasto-plastic stress-strain relation of steel, the constraint effect on concrete is not increased, the strength of the steel tube is low, and finally, the steel tube is damaged due to concrete crushing and steel tube tearing.
In order to overcome the defects of the conventional structure, researchers develop related technologies to improve the bearing capacity storage of the structure and reduce the influence of transverse bridge wind load, earthquake load and the like on the concrete-filled steel tube pier. If the FRP is simply wound outside the steel pipe to form the composite pipe concrete pier, the FRP can be broken shortly after the steel pipe is yielded due to the lower ultimate strain capacity of the FRP, and the aims of 'multi-water defense approval' and performance design of the existing earthquake resistance standard in China cannot be achieved; as another example, chinese patent No. 201720755518.5 discloses a buckling restrained round-ended concrete-filled steel tube pier and a connection structure with a bearing platform, in which a groove for embedding the buckling restrained round-ended concrete-filled steel tube pier is provided at a central position of a reinforced concrete bearing platform, a metal corrugated sleeve is embedded in a side wall of the groove, and fiber-reinforced cement is filled between the buckling restrained round-ended concrete-filled steel tube pier and the metal corrugated sleeve.
Therefore, the design of the corrugated steel tube reinforced concrete filled steel tube pier is an urgent technical problem to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming prior art's is not enough, a ripple steel pipe reinforcing type steel pipe concrete pier is proposed, it is low to overcome the reinforced concrete pier bearing capacity, the poor shortcoming of ductility, make full use of steel pipe concrete structure anti-seismic performance is good advantage, through the bucking in pier bottom reinforcing area increase compound pipe of ripple and UHPC concrete in order to restrain pier bottom steel pipe, improve the ductility of steel pipe concrete pier, with the hope structure under earthquake load and strong vibration loading effect, guarantee that the structure has sufficient bearing capacity deposit, ductility and good absorbed vibration load energy's ability, realize rarely meeting good anti-seismic performance under the earthquake of structure.
In order to solve the technical problem, the utility model provides a ripple steel pipe reinforcing type steel pipe concrete pier, including the ripple composite pipe, the UHPC concrete, the steel pipe, four parts outside-in of core concrete constitute jointly, ripple composite pipe and UHPC concrete only are located the reinforced area of steel pipe concrete pier, the ripple composite pipe is by interior ripple steel pipe, the rubber layer, outer ripple steel pipe three passes through resin bonding and forms a whole, the ripple composite pipe is ripple curve or broken line shape along the component axis direction, UHPC concrete is filled and is full of the clearance between ripple composite pipe and steel pipe, the core concrete is filled in the inside of steel pipe, the steel pipe exerts the constraint effect to the whole cross-section of core concrete, the ripple composite pipe, UHPC concrete both exert local restraint reinforcing action to the reinforced area of steel pipe concrete pier bottom jointly.
The corrugated composite pipe, the UHPC concrete and the steel pipe are positioned around the core concrete in the circumferential direction, the inner corrugated steel pipe, the UHPC concrete and the steel pipe are first layers of constraint materials of the core concrete, and the outer corrugated steel pipe is a second layer of constraint material of the core concrete; the rubber layer is positioned between the inner corrugated steel pipe and the outer corrugated steel pipe, the restraint reinforcing effect of the outer corrugated steel pipe is buffered by utilizing the low elastic modulus, high deformation and easy recovery performance of the rubber layer, and the gap between the inner corrugated steel pipe and the outer corrugated steel pipe is filled by the thickness of the rubber layer, so that a time difference is generated between the inner corrugated steel pipe and the outer corrugated steel pipe when the restraint reinforcing is carried out on the concrete-filled steel pipe pier; the corrugated composite pipe is in a corrugated curve or broken line shape along the axis direction of the member, has large rigidity outside the plane, is not easy to deform in the construction process, fully improves the constraint effect of the corrugated composite pipe on the concrete-filled steel tube pier, and is more favorable for reducing the transverse expansion deformation in the use process. When the core concrete is pressed, firstly, the inner corrugated steel pipe, the UHPC concrete and the steel pipe which are used as the first layer of constraint materials play a constraint role, the strength and the deformability of the core concrete are enhanced in the first stage, at the moment, the outer corrugated steel pipe does not play a constraint role on the core concrete, when the external load continues to increase, the core concrete expands transversely, so that the gap between the inner corrugated steel pipe and the outer corrugated steel pipe is gradually reduced, the constraint action of the outer corrugated steel pipe on the core concrete is gradually generated, the strength and the deformability of the core concrete are further enhanced in the second stage, due to the existence of the rubber layer, a 'yield platform' similar to a steel bar yield stage appears between the first-stage reinforcement of the inner corrugated steel pipe, the UHPC concrete and the core concrete by the steel pipe and the second-stage reinforcement of the core concrete by the outer corrugated steel pipe; the rubber layer delays the damage of the external corrugated steel pipe, so that the structure has better ductility; meanwhile, the second-stage constraint enhancement of the core concrete by the external corrugated steel pipe provides the secondary rigidity of the structure after the steel pipe is yielded, so that the structure has enough bearing capacity storage; the high damping characteristic of the rubber layer provides the structure with good capability of absorbing vibration load energy.
The corrugated curve or broken line shape of the corrugated composite pipe can be one of a sine wave shape, a rectangular sawtooth shape, a trapezoidal sawtooth shape, a continuous type-half wave shape, an interrupted type-half wave shape and a broken line shape.
The rubber of the rubber layer is one of natural rubber, butadiene rubber, chloroprene rubber, isoprene rubber and styrene butadiene rubber.
The section form of the corrugated composite pipe is one of a circle, an ellipse, a rounded square, a rounded rectangle and a round end.
The resin is one of epoxy resin, vinyl resin, polyurethane resin and phenolic resin.
The utility model overcomes the defect that well-known ordinary steel pipe concrete pier exists has the bearing capacity height, and the ductility is good, and the secondary rigidity that strengthens after the surrender platform that can design and the surrender of designable, bearing capacity deposit is big, and damping performance is good, and the durability is good, especially has excellent anti-seismic performance and good absorption vibration load energy ability under rare meeting earthquake. The method has the following specific beneficial effects:
(1) the bearing capacity is high. The UHPC concrete is used as the filler between the corrugated composite pipe and the steel pipe concrete bridge pier, the thickness of the outer wrapping reinforcing layer is reduced, the dead weight is reduced, the ultrahigh compressive strength and good toughness of the UHPC concrete improve the bearing capacity and the seismic performance of the steel pipe concrete bridge pier.
(2) The corrugated composite pipe is UHPC concrete inside, the steel pipe concrete provides the hoop restraint effect, fully promote the restraint effect of corrugated composite pipe to the steel pipe concrete, the corrugated composite pipe is ripple curve or broken line shape along the member axis direction, its outer rigidity in plane is big, in the work progress, should not take place to warp, fully promote the restraint effect of corrugated composite pipe to the steel pipe concrete pier, in the use, more be favorable to reducing horizontal expansion deformation, effectively alleviate the problem that inside steel pipe takes place local buckling destruction.
(3) The cost is low. In the prior art, in order to avoid local buckling of the steel pipe, the wall thickness of the steel pipe is generally considered to be increased, and the corrugated composite pipe and the UHPC concrete are only positioned in a reinforcing area of a steel pipe concrete pier, so that the thickness of the steel pipe is effectively reduced, the self weight of the structure is reduced, and the construction cost is reduced.
(4) Due to the existence of the rubber layer, the restraint effect of the outer corrugated steel pipe is delayed, the damage of the outer corrugated steel pipe is delayed, the structure has better ductility, meanwhile, the high damping characteristic of the rubber layer can consume the vibration energy of the structure, the seismic reaction of the structure is reduced, and the structure is ensured to have good capability of absorbing the vibration energy under the action of strong vibration loads such as transverse bridge wind load and seismic load.
Description of the drawings:
FIG. 1 is a schematic longitudinal section view of a sine-wave corrugated steel pipe reinforced concrete filled steel pipe pier;
FIG. 2 is a schematic longitudinal section view of an interrupted-half-wave corrugated steel pipe reinforced concrete filled steel pipe pier;
FIG. 3 is a schematic longitudinal section view of a continuous-half-wave corrugated steel pipe reinforced concrete filled steel pipe pier;
FIG. 4 is a schematic longitudinal section view of a broken line type corrugated steel pipe reinforced concrete filled steel pipe pier;
FIG. 5 is a schematic longitudinal section view of a rectangular sawtooth type corrugated steel pipe reinforced concrete filled steel pipe bridge pier;
FIG. 6 is a schematic longitudinal section view of a trapezoidal sawtooth type corrugated steel pipe reinforced concrete filled steel pipe bridge pier;
fig. 7 is a schematic cross-sectional view of a circular-section corrugated steel pipe reinforced concrete filled steel pipe pier;
fig. 8 is a schematic cross-sectional view of an oval-section corrugated steel pipe reinforced concrete filled steel pipe pier;
fig. 9 is a schematic cross-sectional view of a fillet square section corrugated steel pipe reinforced concrete filled steel pipe pier;
fig. 10 is a schematic cross-sectional view of a rounded rectangular-section corrugated steel pipe reinforced concrete filled steel pipe pier;
fig. 11 is a schematic cross-sectional view of a round-end-shaped section corrugated steel pipe reinforced concrete filled steel pipe pier;
fig. 12 is a comparison of compressive stress-strain curves of a corrugated steel pipe reinforced concrete filled steel pipe pier and a general concrete filled steel pipe pier.
In fig. 1 to 11, 1 is a corrugated composite pipe; 2 is UHPC concrete; 3 is a steel pipe; 4 is core concrete; 5, a reinforcing area at the bottom of the steel pipe concrete pier; 11 is an inner corrugated steel pipe; 12 is a rubber layer; and 13 is an external corrugated steel pipe.
In fig. 12, the curves shown are: a is a compressive stress-strain curve of the common concrete-filled steel tube pier; b is a compressive stress-strain curve of the corrugated steel pipe reinforced concrete filled steel tube pier; in a compression stress-strain curve of the corrugated steel pipe reinforced concrete filled steel pipe pier, a is an elastic-plastic stage, b is a yield stage, c is a strengthening stage, and d is a residual stage.
The specific implementation mode is as follows:
in order to clearly understand the technical features, objects and effects of the present invention, the detailed implementation method of the present invention will now be described with reference to the accompanying drawings.
The utility model provides a ripple steel pipe reinforcing type steel pipe concrete pier, including ripple composite pipe 1, UHPC concrete 2, steel pipe 3, 4 four parts outside-in of core concrete constitute jointly, ripple composite pipe 1 and UHPC concrete 2 are located the reinforced area 5 of steel pipe concrete pier bottom, ripple composite pipe 1 is by interior ripple steel pipe 11, rubber layer 12, outer ripple steel pipe 13 three part forms a whole through the resin bonding, utilize the low elastic modulus of rubber layer 12, high deformation, the performance of easy recovery, the restraint reinforcing action of buffering outer ripple steel pipe 13, the clearance between interior ripple steel pipe 11 and outer ripple steel pipe 13 has been filled to the thickness of rubber layer 12, make outer ripple steel pipe 13 produce a time difference when reinforcing the restraint of core concrete 4; the corrugated composite pipe 1 is in a corrugated curve or broken line shape along the axis direction of the member, the rigidity outside the plane is large, deformation is not prone to occurring in the construction process, the restraint effect of the corrugated composite pipe 1 on the steel pipe concrete pier is fully improved, transverse expansion deformation is more favorably reduced in the use process, and the problem of local buckling damage of an inner steel pipe is effectively reduced; the UHPC concrete 2 is filled in and filled in a gap between the corrugated composite pipe 1 and the steel pipe 3, the bearing capacity and the seismic performance of the steel pipe concrete pier are improved due to the ultrahigh compressive strength and the good toughness performance of the UHPC concrete 2, the core concrete 4 is filled in the steel pipe 3, the steel pipe 3 exerts a constraint effect on the whole section of the core concrete 4, and the corrugated composite pipe 1 and the UHPC concrete 2 jointly exert a local constraint enhancement effect on a reinforcement area 5 at the bottom of the steel pipe concrete pier.
The corrugated composite pipe 1, the UHPC concrete 2 and the steel pipe 3 are positioned around the core concrete 4 in the circumferential direction, the inner corrugated steel pipe 11, the UHPC concrete 2 and the steel pipe 3 are first layers of constraint materials of the core concrete 4, and the outer corrugated steel pipe 13 is a second layer of constraint materials of the core concrete 4; the rubber layer 12 is located between the inner corrugated steel tube 11 and the outer corrugated steel tube 13, and the thickness of the rubber layer 12 fills the gap between the inner corrugated steel tube 11 and the outer corrugated steel tube 13 to buffer the restraint enhancement effect of the outer corrugated steel tube 13.
The corrugated curve or broken line shape of the corrugated composite pipe 1 can be one or a combination of a plurality of sine wave type, rectangular sawtooth type, trapezoidal sawtooth type, continuous type-half wave type, discontinuous type-half wave type and broken line type.
The rubber of the rubber layer 12 is one of natural rubber, butadiene rubber, chloroprene rubber, isoprene rubber and styrene butadiene rubber, and is mainly characterized by small elastic modulus, good rebound resilience, good damping performance and larger deformation and recovery characteristics.
The cross section of the corrugated composite pipe 1 is in one of a circular shape, an oval shape, a rounded square shape, a rounded rectangular shape and a round end shape.
The resin is one of epoxy resin, vinyl resin, polyurethane resin and phenolic resin.
To further illustrate the working principle and technical effect of the present invention, fig. 12 illustrates the compressive stress-strain curve comparison between the corrugated steel pipe reinforced steel pipe concrete pier and the conventional steel pipe concrete pier of the present invention, the compressive stress-strain relationship curve of the corrugated steel pipe reinforced steel pipe concrete pier is represented by elastic-plastic stage a, yield stage b, reinforcement stage c and residual stage d, the inner corrugated steel pipe 11, UHPC concrete 2 and steel pipe 3 provide the first stage constraint reinforcement for the core concrete 4, which is mainly represented by elastic-plastic stage a, since the rubber layer 12 provides the core concrete 4 with the compression space for the inner corrugated steel pipe 11 and the steel pipe 3 to deform transversely after yielding, so that the core concrete 4 exhibits one section of "yield platform", i.e. yield stage b, after the inner corrugated steel pipe 11 and the steel pipe 3 yield, the length of the "yield plateau" is determined by the gap filled by the thickness of the rubber layer 12, which gap gradually decreases during the expansion of the core concrete 4; the outer corrugated steel pipe 13 provides the second stage constraint reinforcement for the core concrete 4, so that the bearing capacity of the core concrete 4 in the second stage can be continuously and greatly increased, and the second stage constraint reinforcement is represented as a reinforcement stage c; until the outer corrugated steel pipe 13 is broken, the steel pipe 3 can continue to provide certain constraint force for the core concrete 4, and the higher residual bearing capacity of the structure, namely the residual stage d, is maintained. The utility model discloses a compressive stress-strain relation curve shows and bears the weight of the dynamic height, and the ductility is good, and the secondary rigidity of strengthening after surrender that can designable surrender platform and designable surrender.
The utility model discloses compare with existing ordinary steel pipe concrete pier and have great advantage, be the structure of innovation, can effectively restrain bottom steel pipe bucking, have excellent anti-seismic performance and good absorption vibration load energy ability under effects such as horizontal bridge wind load, earthquake load, can satisfy the needs of the anti-seismic "multiple water is accurate to be set up a defence" of structure and can change the design.
Claims (6)
1. A corrugated steel pipe reinforced concrete filled steel pipe pier comprises a corrugated composite pipe (1), UHPC concrete (2), a steel pipe (3) and core concrete (4) which are jointly formed from outside to inside, and is characterized in that the corrugated composite pipe (1) and the UHPC concrete (2) are positioned in a reinforcing area (5) at the bottom of the concrete filled steel pipe pier, the corrugated composite pipe (1) is formed by bonding three parts of an inner corrugated steel pipe (11), a rubber layer (12) and an outer corrugated steel pipe (13) through resin into a whole, the corrugated composite pipe (1) is in a corrugated curve or broken line shape along the axial direction of a member, the UHPC concrete (2) is filled and filled in a gap between the corrugated composite pipe (1) and the steel pipe (3), the core concrete (4) is filled in the steel pipe (3), the steel pipe (3) exerts a restraining effect on the whole section of the core concrete (4), the corrugated composite pipe (1) and the UHPC concrete (2) jointly exert a local constraint and reinforcement effect on a reinforcement area (5) at the bottom of the steel pipe concrete pier.
2. The corrugated steel pipe reinforced steel pipe concrete pier as claimed in claim 1, wherein the corrugated composite pipe (1), the UHPC concrete (2) and the steel pipe (3) are positioned around the core concrete (4) in the circumferential direction, the inner corrugated steel pipe (11), the UHPC concrete (2) and the steel pipe (3) are first layers of constraint materials of the core concrete (4), and the outer corrugated steel pipe (13) is a second layer of constraint materials of the core concrete (4); the rubber layer (12) is positioned between the inner corrugated steel pipe (11) and the outer corrugated steel pipe (13), and the thickness of the rubber layer (12) fills the gap between the inner corrugated steel pipe (11) and the outer corrugated steel pipe (13) to buffer the restraint enhancement effect of the outer corrugated steel pipe (13).
3. The pier with the corrugated steel pipe reinforced concrete filled steel pipe as claimed in claim 1, wherein the corrugated curve or broken line shape of the corrugated composite pipe (1) can be one or a combination of sine wave, rectangular sawtooth, trapezoidal sawtooth, continuous half wave, discontinuous half wave and broken line.
4. The pier of claim 1, wherein the rubber of the rubber layer (12) is one of natural rubber, butadiene rubber, chloroprene rubber, isoprene rubber and styrene-butadiene rubber.
5. The pier of claim 1, wherein the cross section of the corrugated composite pipe (1) is one of circular, oval, rounded square, rounded rectangle and rounded end.
6. The pier of claim 1, wherein the resin is one of epoxy resin, vinyl resin, polyurethane resin, and phenolic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921537421.2U CN211057596U (en) | 2019-09-11 | 2019-09-11 | Corrugated steel pipe reinforced concrete-filled steel tube pier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921537421.2U CN211057596U (en) | 2019-09-11 | 2019-09-11 | Corrugated steel pipe reinforced concrete-filled steel tube pier |
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| CN211057596U true CN211057596U (en) | 2020-07-21 |
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| CN201921537421.2U Expired - Fee Related CN211057596U (en) | 2019-09-11 | 2019-09-11 | Corrugated steel pipe reinforced concrete-filled steel tube pier |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112575952A (en) * | 2020-12-02 | 2021-03-30 | 苏州科技大学 | End steel plate self-anchoring structure of double-steel-plate-concrete combined structure |
| CN113338536A (en) * | 2021-05-24 | 2021-09-03 | 福州大学 | Double-layer corrugated steel plate concrete combined column with built-in steel ribs |
| CN114108810A (en) * | 2021-11-29 | 2022-03-01 | 扬州大学 | Composite enhanced steel sleeve joint for assembling FRP pipe truss and installation method |
| CN114134803A (en) * | 2021-09-26 | 2022-03-04 | 重庆大学 | Assembled thin-walled steel tube concrete pier system and construction process thereof |
-
2019
- 2019-09-11 CN CN201921537421.2U patent/CN211057596U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112575952A (en) * | 2020-12-02 | 2021-03-30 | 苏州科技大学 | End steel plate self-anchoring structure of double-steel-plate-concrete combined structure |
| CN113338536A (en) * | 2021-05-24 | 2021-09-03 | 福州大学 | Double-layer corrugated steel plate concrete combined column with built-in steel ribs |
| CN114134803A (en) * | 2021-09-26 | 2022-03-04 | 重庆大学 | Assembled thin-walled steel tube concrete pier system and construction process thereof |
| CN114108810A (en) * | 2021-11-29 | 2022-03-01 | 扬州大学 | Composite enhanced steel sleeve joint for assembling FRP pipe truss and installation method |
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