CN112681155A - Assembly type steel-UHPC combined reinforcement structure for improving shear bearing capacity of hollow plate girder and construction method thereof - Google Patents
Assembly type steel-UHPC combined reinforcement structure for improving shear bearing capacity of hollow plate girder and construction method thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of bridge reinforcement, and particularly relates to an assembled steel-UHPC combined reinforcement structure for improving the shear bearing capacity of a hollow plate girder. The assembled steel-UHPC combined box girder has the advantages of low material and manufacturing cost, remarkable improvement on shearing resistance and bearing capacity, no influence on bridge deck traffic, convenience, rapidness, remarkable economic benefit and social benefit, and the whole reinforcing construction is operated at the lower part of the hollow plate girder without involving the bridge deck part.
Description
Technical Field
The invention belongs to the technical field of bridge reinforcement, and particularly relates to an assembly type steel-UHPC combined reinforcement structure for improving the shear bearing capacity of a hollow plate girder and a construction method thereof.
Background
With the rapid development of national economy and traffic infrastructure construction capacity of China, the bridge construction level reaches a brand new height. According to the relevant data, the total quantity of the built bridges in China breaks through 100 thousands of seats by 10 months in 2019. Wherein, the percentage of the bridges with small and medium span is more than 90%. Hollow slab beams in bridges with medium and small spans are used in large quantities, and particularly in bridges with medium and small spans less than 20m, most of the cross sections of the hollow slab beams are hollow slab beams.
Along with the rapid development of traffic transportation construction, the traffic flow and the vehicle load are increased. Under the operating conditions of large traffic volume and heavy load, the existing bridge structure is under great pressure. Meanwhile, the problem of bridge diseases caused by improper operation and maintenance is increasingly prominent, and particularly, the problem of the diseases is more serious in the most widely used hollow slab girder bridge. In the hollow slab girder bridge, cracks and hairpin damages are two most representative and common diseases, and the diseases damage the normal use performance of the bridge and even directly damage the life and property safety of people.
As one of the crack diseases which are difficult to treat, the inclined section cracks are caused by insufficient shear bearing capacity of the hollow plate girder. Aiming at the problem of insufficient shear bearing capacity of the hollow plate beams, common structural shear bearing capacity reinforcement technologies, such as a section increasing reinforcement method, an external prestress reinforcement method, a steel plate pasting method, a carbon fiber cloth pasting reinforcement technology and the like, cannot be applied, because shear reinforcement needs to increase the section of the side surface of the hollow plate beam or add materials, all the hollow plate beams are tightly connected, especially the middle plate of the hollow plate beam cannot provide an operation space necessary for reinforcement, the hollow plate beams frequently with insufficient shear bearing capacity face the fate of dismantling and rebuilding, and economic and social benefit loss is huge.
If the bridge is not effectively reinforced and transformed, the bridge cannot be put into normal use. Even collapse and damage can be caused when the inclined section cracks of the hollow slab beam bridge are serious, so that the shearing-resistant bearing capacity reinforcing technology of the hollow slab beam, which is simplified, economical, efficient and practical, needs to be developed urgently in engineering application.
Disclosure of Invention
The invention aims to solve the problem of insufficient shear bearing capacity of the existing hollow slab bridge, and provides a hollow slab beam shear bearing capacity reinforcing structure which can be constructed at the bottom of a hollow slab beam, does not interrupt traffic, is rapid and efficient and has a good reinforcing effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
the assembled steel-UHPC combined reinforcement structure for improving the shear bearing capacity of the hollow plate girder comprises a steel-UHPC combined box girder, wherein the steel-UHPC combined box girder comprises a closed steel box, grouting holes are formed in the closed steel box, and a UHPC box body is poured in the closed steel box through the grouting holes.
The Ultra-High Performance Concrete is called UHPC (Ultra-High Performance Concrete) for short, and the compressive strength under standard curing is more than 120 MPa.
Preferably, the closed steel box comprises a top steel plate which is longitudinally arranged, a U-shaped cold-bending thin-wall steel plate is longitudinally arranged on the top steel plate, and a transverse end-sealing steel plate is arranged at the connecting end part of the top steel plate and the U-shaped cold-bending thin-wall steel plate; the three grouting holes are square and are uniformly distributed on the top steel plate; and a plurality of anchoring holes are uniformly formed in the top steel plate.
Preferably, the height of the longitudinal section of the steel-UHPC combined box girder in the length direction from the middle point to the end close to the midspan is gradually reduced.
Preferably, the steel-UHPC combined box girder is fixedly arranged under a web plate of the cross section of the hollow plate girder by using self-locking bolts.
Preferably, the steel-UHPC combined box girder is provided with counter-pulling steel bars.
Preferably, the UHPC box body is formed by prefabricating and pouring ultra-high performance steel fiber concrete, and the preparation method comprises the following steps:
(1) processing a closed steel box: manufacturing a longitudinal top steel plate, and forming grouting holes and anchoring holes in the surface of the longitudinal top steel plate, wherein the grouting holes and the anchoring holes are uniformly distributed along the length of the top steel plate; manufacturing a U-shaped cold-bending thin-wall steel plate, and welding counter-pulling steel bars on the inner side of the U-shaped cold-bending thin-wall steel plate; manufacturing a transverse end-sealing steel plate; assembling and welding a longitudinal top steel plate, a U-shaped cold-bending thin-wall steel plate and a transverse end-sealed steel plate;
(2) pouring a UHPC box body: and pouring ultra-high performance steel fiber concrete into the welded closed steel box through the grouting hole.
The invention also discloses a construction method of any one of the assembled steel-UHPC combined reinforced structures for improving the shear bearing capacity of the hollow plate girder, which comprises the following steps:
(1) erecting a scaffold: erecting a scaffold which does not obstruct the passing of the bridge:
(2) surface cleaning: polishing two sides of the bottom surface of the hollow slab beam to remove residual impurities;
(3) drilling an anchoring hole: drilling anchoring holes vertically from bottom to top at intervals by using a drill bit under a beam rib of the hollow plate beam, drilling the anchoring holes according to the anchoring holes preset on a steel plate at the top of the steel-UHPC combined box beam, wherein the longitudinal distance between the anchoring holes is 20cm, the depth is 15 cm, and cleaning the inner wall of each anchoring hole by using a brush or high-pressure air after the drilling of the anchoring holes is finished;
(4) bonding and fixing the self-locking bolt: cleaning the inner wall of an anchoring hole drilled in the hollow slab beam, smearing an inorganic adhesive on the inner wall of the anchoring hole, embedding a self-locking bolt into the anchoring hole, and standing until the inorganic adhesive is bonded;
(5) installing a steel-UHPC combined box girder: aligning the anchoring holes on the steel-UHPC combined box girder with the installed self-locking bolts one by one and screwing the nuts;
(6) and (5) dismantling the scaffold.
Preferably, the anchoring holes drilled in the hollow slab beam are required to avoid longitudinal main ribs in the hollow slab beam.
Preferably, the inorganic binder is a magnesium oxychloride binder.
Preferably, the diameter of the self-locking bolt is not less than 10mm, the self-locking bolt comprises a screwing head, a screw rod and a nut, the screw rod is vertically arranged below the screwing head, and a locking groove is formed in the side face of the screw rod.
Advantageous effects
The invention discloses an assembly type steel-UHPC combined reinforcing structure for improving the shear bearing capacity of a hollow plate girder, wherein the shear bearing capacity of the hollow plate girder is improved by drilling and fixing a steel-UHPC combined box girder, a new reinforcing part realizes the joint work with an original structure by anchoring a self-anchoring bolt and the hollow plate, the reinforcing material adopts the traditional material, the cost is low, the calculation theory is simple, the whole reinforcing construction is operated at the lower part of the hollow plate girder, the bridge deck part is not involved, no influence is caused on bridge deck traffic, the structure is convenient and rapid, and the economic benefit and the social benefit are obvious. The invention has the following beneficial effects:
(1) the steel-UHPC combined box girder and the hollow plate girder are well combined by embedding the self-locking bolt and injecting the inorganic binder in the drill hole, the shear-resistant bearing capacity is increased by increasing the section area, and the method is a reinforcing method which is convenient to operate.
(2) Through the mode of boring at hollow slab roof beam bottom and establishing the anchor hole, to bridge deck pavement and bridge floor traffic not influence, can not interrupt the traffic at whole reinforcement in-process, high efficiency can guarantee the normal use of hollow slab roof beam.
(3) The method solves the technical problem that the reinforcement of the shear-resistant bearing capacity of the middle plate of the hollow plate beam is difficult to implement, can replace the traditional reinforcement mode of removing the side plate, and can realize the rapid reinforcement of the shear-resistant bearing capacity of the hollow plate beam in a short time.
Drawings
FIG. 1: the schematic structural diagram of the steel-UHPC combined box girder in the embodiment 1 of the invention in the front view is shown;
FIG. 2: the A-A section structure of the steel-UHPC combined box girder is shown in figure 1;
FIG. 3: the invention embodiment 1 said steel-UHPC combination box beam attaches to look the structure schematic diagram;
FIG. 4: the left view structure schematic diagram of the steel-UHPC combined box girder in the embodiment 1 of the invention;
FIG. 5: the longitudinal structure schematic diagram of the steel-UHPC combined box girder of the embodiment 2 of the invention is arranged on a hollow plate girder;
FIG. 6: the structural schematic diagram of the A-A section of the steel-UHPC combined box girder disclosed by the embodiment 2 of the invention, which is arranged on a hollow slab girder, is shown;
FIG. 7: the steel-UHPC combined box girder of the embodiment 2 of the invention adopts a schematic diagram of a self-locking bolt connection structure;
FIG. 8: a comparison graph of a load-displacement relation curve after hollow plate girder reinforcement and a load-displacement relation curve before reinforcement in embodiment 3 of the invention is shown;
in the figure, 1: closed steel box, 2: UHPC box, 3: top steel plate, 4: u type cold-formed thin-walled steel sheet, 5: transverse-end-capped steel plate, 6: grouting holes; 7: an anchoring hole; 8: oppositely pulling the reinforcing steel bars; 9: a self-locking bolt; 10: an inorganic binder; 11: a hollow slab beam; 12: a steel-UHPC composite box girder; 13: and a nut.
Detailed Description
Hereinafter, the present invention will be described in detail. Before the description is made, it should be understood that the terms used in the present specification and the appended claims should not be construed as limited to general and dictionary meanings, but interpreted based on the meanings and concepts corresponding to technical aspects of the present invention on the basis of the principle that the inventor is allowed to define terms appropriately for the best explanation. Accordingly, the description proposed herein is just a preferable example for the purpose of illustrations only, not intended to limit the scope of the invention, so it should be understood that other equivalents and modifications could be made thereto without departing from the spirit and scope of the invention.
The following examples are given by way of illustration of embodiments of the invention and are not to be construed as limiting the invention, and it will be understood by those skilled in the art that modifications may be made without departing from the spirit and scope of the invention. Unless otherwise specified, reagents and equipment used in the following examples are commercially available products.
Example 1
As shown in fig. 1-4, an assembly type steel-UHPC combined reinforcement structure for improving shear bearing capacity of a hollow plate girder comprises a steel-UHPC combined box girder, wherein the steel-UHPC combined box girder comprises a closed steel box 1, a grouting hole 6 is formed in the closed steel box, and a UHPC box body 2 is poured in the closed steel box through the grouting hole.
The Ultra-High Performance Concrete is called UHPC (Ultra-High Performance Concrete) for short, and the compressive strength under standard curing is more than 120 MPa.
As shown in fig. 1, the closed steel box comprises a top steel plate 3 which is longitudinally arranged, a U-shaped cold-bending thin-wall steel plate 4 is longitudinally arranged on the top steel plate, and a transverse end-sealing steel plate 5 is arranged at the connecting end part of the top steel plate and the U-shaped cold-bending thin-wall steel plate; as shown in fig. 3, the three grouting holes 6 are square grouting holes, and are uniformly distributed on the top steel plate; and a plurality of anchoring holes 7 are uniformly formed in the top steel plate.
As shown in FIG. 1, the height of the longitudinal section of the steel-UHPC combined box girder from the midpoint to the right end in the length direction gradually decreases from 20cm to 5 cm.
The steel-UHPC combined box girder is fixedly arranged under a web plate at the cross section of the hollow plate girder by using self-locking bolts, the transverse width of the combined box girder is 10cm, the height of the combined box girder is 20cm, and the length of the combined box girder is 4 m.
The steel-UHPC combined box girder is provided with counter-pulling reinforcing steel bars 8, the counter-pulling reinforcing steel bars with the diameter of 12mm are arranged at the position of 10cm of the height of the combined box girder and are used for connecting a web plate of the hollow slab girder, the distance between every two adjacent counter-pulling reinforcing steel bars is 20cm, and a first counter-pulling reinforcing steel bar is arranged at the position 10cm away from a closed opening. In the variable cross section area, no counter-pulling reinforcing steel bar is arranged at the position where the height of the longitudinal cross section is less than 14cm, and a counter-pulling reinforcing steel bar with the diameter of 12cm is arranged at the position where the height of the longitudinal cross section is half of the height of the longitudinal cross section in the area which is greater than 14 cm.
The UHPC box body is formed by prefabricating and pouring ultra-high performance steel fiber concrete, and the preparation method comprises the following steps:
(1) processing a closed steel box: manufacturing a longitudinal top steel plate, wherein the size of the longitudinal top steel plate is as follows: the length of the top steel plate is 4m, the width of the top steel plate is 10cm, the thickness of the top steel plate is 2cm, and grouting holes and anchoring holes are formed in the surface of the top steel plate and are uniformly distributed along the length of the top steel plate; manufacturing a U-shaped cold-bending thin-wall steel plate, and welding counter-pulling steel bars on the inner side of the U-shaped cold-bending thin-wall steel plate; manufacturing a transverse end-sealing steel plate; assembling and welding a longitudinal top steel plate, a U-shaped cold-bending thin-wall steel plate and a transverse end-sealed steel plate;
(2) pouring a UHPC box body: and pouring ultra-high performance steel fiber concrete into the welded closed steel box through the grouting hole.
The steel-UHPC combined box girder has the advantages of simple structure, low material and manufacturing cost and convenient and quick construction, the reinforcing construction of the steel-UHPC combined box girder can be operated at the lower part of the hollow plate girder, the bridge deck part is not involved, the bridge deck traffic is not influenced, and the steel-UHPC combined box girder is convenient and quick and has obvious economic and social benefits.
Example 2
As shown in fig. 5 to 7, the construction method of the assembly type steel-UHPC combined reinforcement structure for improving the shear capacity of the hollow plate girder according to embodiment 1 includes the following steps:
(1) erecting a scaffold: erecting a scaffold which does not obstruct the passing of the bridge:
(2) surface cleaning: polishing two sides of the bottom surface of the hollow slab beam to remove residual impurities;
(3) drilling an anchoring hole: drilling anchoring holes vertically from bottom to top at intervals by using a drill bit under a beam rib of the hollow plate beam, drilling the anchoring holes according to the anchoring holes preset on a steel plate at the top of the steel-UHPC combined box beam, wherein the longitudinal distance between the anchoring holes is 20cm, the depth is 15 cm, and cleaning the inner wall of each anchoring hole by using a brush or high-pressure air after the drilling of the anchoring holes is finished;
(4) bonding and fixing the self-locking bolt: cleaning the inner wall of an anchoring hole drilled in the hollow slab beam, smearing an inorganic adhesive on the inner wall of the anchoring hole, embedding a self-locking bolt into the anchoring hole, and standing until the inorganic adhesive is bonded;
(5) installing a steel-UHPC combined box girder: aligning the anchoring holes on the steel-UHPC combined box girder with the installed self-locking bolts one by one and screwing the nuts;
(6) and (5) dismantling the scaffold.
And drilling anchoring holes on the hollow slab beam to avoid longitudinal main ribs in the hollow slab beam. The inorganic binder is a magnesium oxychloride binder. The diameter of the self-locking bolt is not less than 10mm, the self-locking bolt comprises a screwing head, a screw rod and a nut 13, the screw rod is vertically arranged below the screwing head, and a locking groove is formed in the side face of the screw rod.
The construction method of the assembled steel-UHPC combined reinforcement structure for improving the shear bearing capacity of the hollow plate girder can be used for construction at the bottom of the hollow plate girder, does not interrupt traffic, is rapid and efficient, and has good reinforcement effect.
The shear-resistant bearing capacity of the hollow plate girder is improved by drilling and fixing the steel-UHPC combined box girder, the newly reinforced part is anchored with the hollow plate through the self-anchoring bolts to realize the common work with the original structure, the reinforced material adopts the traditional material, the cost is low, the calculation theory is simple, the whole reinforcement construction is operated at the lower part of the hollow plate girder, the bridge deck part is not involved, the bridge deck traffic can not be influenced, the method is convenient and rapid, and the economic benefit and the social benefit are obvious.
Example 3
A certain highway has been operated for more than 20 years, and is currently facing the problem of reconstruction and expansion. Through inspection and evaluation, the shear-resistant bearing capacity of the upper hollow plate girder bridge on the highway can not meet the design standard load requirement of the existing highway bridge, and the engineering needs to improve the shear-resistant bearing capacity of the hollow plate girder bridges in an efficient and practical reinforcing mode urgently.
The total width of the original bridge hollow plate beam single plate is 1m, the height is 82cm, the thickness of the web plate is 19.5cm, the thicknesses of the top plate and the bottom plate are both 8cm, and the web plate is provided with double-limb stirrups with the longitudinal distance of 10cm and the diameter of 8 mm. When the assembled steel-UHPC combined reinforcement structure is adopted to improve the shearing resistance and bearing capacity of the hollow plate girder, the data comparison of the load-displacement relation curve after the hollow plate girder is reinforced and the load-displacement relation curve before the hollow plate girder is reinforced is shown in the table 1, and the drawing curve comparison is shown in the figure 8.
TABLE 1 data table of load-displacement curve before and after hollow plate girder reinforcement
As can be seen from the comparative analysis of the data in fig. 8 and table 1, after the hollow plate beam is reinforced by the scheme of the invention, the ultimate shear bearing capacity of the hollow plate beam is improved from 455.1kN before reinforcement to 586.9kN after reinforcement, and the ultimate shear bearing capacity after reinforcement is improved by 28.9% compared with that before reinforcement.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. The assembled steel-UHPC combined reinforcement structure is characterized by comprising a steel-UHPC combined box girder, wherein the steel-UHPC combined box girder comprises a closed steel box, grouting holes are formed in the closed steel box, and a UHPC box body is poured in the closed steel box through the grouting holes.
2. The assembled steel-UHPC combined reinforcement structure for improving the shear bearing capacity of the hollow plate girder as claimed in claim 1, wherein the closed steel box comprises a top steel plate which is longitudinally arranged, a U-shaped cold-bending thin-walled steel plate is longitudinally arranged on the top steel plate, the top steel plate and the U-shaped cold-bending thin-walled steel plate are provided with transverse end-sealed steel plates at the connecting end parts, the grouting holes are uniformly distributed on the top steel plate, and a plurality of anchoring holes are uniformly arranged on the top steel plate.
3. The assembled steel-UHPC combined reinforcement structure for improving the shear bearing capacity of the hollow plate girder according to claim 1, wherein the longitudinal section height of the steel-UHPC combined box girder from the midpoint to the end close to the midspan in the length direction is gradually reduced.
4. The assembled steel-UHPC combined reinforcement structure for improving the shear bearing capacity of the hollow plate girder according to claim 1, wherein the steel-UHPC combined box girder is provided with counter-pulling steel bars.
5. The assembled steel-UHPC combined reinforcement structure for improving the shear bearing capacity of the hollow plate girder according to claim 1, is characterized in that the steel-UHPC combined box girder is fixedly arranged at the part to be reinforced of the hollow plate girder by using self-locking bolts.
6. The assembled steel-UHPC combined reinforcement structure for improving the shear bearing capacity of the hollow plate girder according to any one of claims 1 to 5, wherein the UHPC box body is formed by prefabricating and pouring ultra-high performance steel fiber concrete, and the preparation method comprises the following steps:
(1) processing a closed steel box: manufacturing a longitudinal top steel plate, and forming grouting holes and anchoring holes in the surface of the longitudinal top steel plate, wherein the grouting holes and the anchoring holes are uniformly distributed along the length of the top steel plate; manufacturing a U-shaped cold-bending thin-wall steel plate, and welding counter-pulling steel bars on the inner side of the U-shaped cold-bending thin-wall steel plate; manufacturing a transverse end-sealing steel plate; assembling and welding a top steel plate, a U-shaped cold-bending thin-wall steel plate and a transverse end-sealed steel plate;
(2) pouring a UHPC box body: and pouring ultra-high performance steel fiber concrete into the welded closed steel box through the grouting hole.
7. A construction method of an assembly type steel-UHPC combined reinforcement structure for improving the shear bearing capacity of a hollow plate girder is characterized by comprising the following steps:
(1) erecting a scaffold: erecting a scaffold which does not obstruct the passing of the bridge:
(2) surface cleaning: polishing two sides of the bottom surface of the hollow slab beam to remove residual impurities;
(3) drilling an anchoring hole: drilling anchoring holes vertically from bottom to top at intervals by using a drill bit under beam ribs of the hollow plate beam, drilling the anchoring holes according to the anchoring holes preset on the steel-UHPC combined box beam top steel plate, and cleaning the inner walls of the anchoring holes after the drilling of the anchoring holes is finished;
(4) bonding and fixing the self-locking bolt: cleaning the inner wall of an anchoring hole drilled in the hollow slab beam, smearing an inorganic adhesive on the inner wall of the anchoring hole, embedding a self-locking bolt into the anchoring hole, and standing until the inorganic adhesive is bonded;
(5) installing a steel-UHPC combined box girder: aligning the anchoring holes on the steel-UHPC combined box girder with the installed self-locking bolts one by one and screwing the nuts;
(6) and (5) dismantling the scaffold.
8. The construction method of the assembled steel-UHPC combined reinforcement structure for improving the shear bearing capacity of the hollow plate girder according to claim 7, wherein the anchor holes drilled on the hollow plate girder are avoided from the longitudinal main ribs in the hollow plate girder.
9. The construction method of the assembled steel-UHPC combined reinforcement structure for improving the shear bearing capacity of the hollow plate girder according to claim 7, wherein the inorganic binder is a magnesium oxychloride binder.
10. The construction method of the assembled steel-UHPC combined reinforcement structure for improving the shear bearing capacity of the hollow plate girder according to claim 7, is characterized in that the longitudinal distance of the anchoring holes is 20cm, and the depth is 15 cm; the diameter of the self-locking bolt is not less than 10 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011524211.7A CN112681155B (en) | 2020-12-22 | 2020-12-22 | Assembled steel-UHPC combined reinforcement structure for improving shear bearing capacity of hollow slab beam and construction method thereof |
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| CN202011524211.7A CN112681155B (en) | 2020-12-22 | 2020-12-22 | Assembled steel-UHPC combined reinforcement structure for improving shear bearing capacity of hollow slab beam and construction method thereof |
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| CN112681155B CN112681155B (en) | 2023-05-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115059237A (en) * | 2022-07-28 | 2022-09-16 | 武汉大学 | FRP section bar-UHPC-recycled concrete composite beam |
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| CN203361030U (en) * | 2013-06-25 | 2013-12-25 | 西安公路研究院 | Box beam or T-shaped beam reinforcing structure combining unbonded pre-stress and steel plate concrete |
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| US20190309488A1 (en) * | 2018-04-09 | 2019-10-10 | Changsha University Of Science & Technology | Segmental joint of cast-in-place uhpc beam bridge and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102561214A (en) * | 2012-02-15 | 2012-07-11 | 中南大学 | Steel plate and concrete composite structure reinforcing method for positive bending moment area |
| CN203361030U (en) * | 2013-06-25 | 2013-12-25 | 西安公路研究院 | Box beam or T-shaped beam reinforcing structure combining unbonded pre-stress and steel plate concrete |
| CN105803916A (en) * | 2016-03-30 | 2016-07-27 | 邵旭东 | Steel and ultra-high performance concrete light combined box type cover beam and manufacturing method thereof |
| US20190309488A1 (en) * | 2018-04-09 | 2019-10-10 | Changsha University Of Science & Technology | Segmental joint of cast-in-place uhpc beam bridge and construction method thereof |
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| CN115059237A (en) * | 2022-07-28 | 2022-09-16 | 武汉大学 | FRP section bar-UHPC-recycled concrete composite beam |
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