Steel-concrete composite beam bridge with multi-stage energy consumption self-resetting anti-collision guardrails

Abstract

The utility model discloses a steel-concrete composite beam bridge with a multi-stage energy consumption self-resetting anti-collision guardrail, which mainly comprises the multi-stage energy consumption self-resetting anti-collision guardrail, a concrete bridge deck and a composite steel beam, and the multi-stage energy consumption self-resetting anti-collision guardrail comprises an anti-collision guardrail plate, a reinforced concrete guardrail, an energy consumption device and an energy consumption groove. The concrete bridge deck slab comprises bridge deck concrete, transverse stiffening ribs and bridge deck slab longitudinal steel bars, and the combined steel beam comprises a steel main beam, a diaphragm beam, welding nails and a steel bottom plate. According to the utility model, the anti-collision guardrail plate and the combined steel beam are integrally formed by adopting the prefabricated parts, and only the reinforced concrete guardrail and the concrete bridge deck are required to be cast in situ; when collision occurs, the first-stage energy consumption device preferentially absorbs and disperses collision energy and then transmits the energy to the second-stage energy consumption device, the second-stage energy consumption device absorbs the remaining collision energy, the elastic self-resetting device arranged in the second-stage energy consumption device automatically restores guardrail deformation after collision, the manual maintenance requirement is reduced, and the integrity and durability of a bridge are enhanced.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering technology, and in particular to a steel-concrete composite beam bridge with a multi-level energy-dissipating self-resetting anti-collision guardrail. Background Technology

[0002] With the rapid development of my country's transportation infrastructure construction, the scale and complexity of bridge engineering have significantly increased. Statistics show that by the end of 2023, the total number of highway bridges in my country had exceeded one million. Among them, steel-concrete composite bridges, with their superior load-bearing performance, have been widely used in recent years. However, in traditional construction techniques, the main body of the bridge and its ancillary facilities (such as crash barriers) are mostly constructed using a phased cast-in-place method, with few integrated crash protection systems, leading to extended construction periods and insufficient structural integrity.

[0003] In the field of traffic safety, crash barriers are considered the "lifeline" of bridges, and their performance directly affects the accident casualty rate. Traditional bridge crash barriers are mostly reinforced concrete structures. Cast-in-place reinforced concrete crash barriers have high rigidity but lack buffering capabilities. Under high-speed impacts, sudden changes in stiffness often lead to structural failure, resulting in a loss of guidance for out-of-control vehicles and causing serious accidents. Furthermore, the construction process of cast-in-place crash barriers faces technical bottlenecks. Their discrete construction operation mode requires on-site formwork erection, and the installation of the outer formwork relies on high-altitude work platforms, leading to even higher construction safety risks. Some energy-dissipating crash barriers are made of rigid materials, relying on deformation and damage to absorb energy; however, their deformation capacity and energy absorption capacity are limited.

[0004] In conclusion, ensuring the safety of bridge construction and addressing the limited energy dissipation capacity of existing bridge crash barriers have become issues that need to be resolved by those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to provide a construction scheme for a multi-level energy-dissipating self-resetting crash barrier, which can ensure bridge construction safety, significantly improve the crash barrier's anti-collision capability, reduce damage caused by vehicle impacts, and the elastic self-resetting device automatically restores the barrier's deformation after impact, thus strengthening the bridge's integrity and durability. To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A steel-concrete composite beam bridge with a multi-stage energy-dissipating self-resetting crash barrier includes an energy-dissipating crash barrier, a concrete bridge deck, and composite steel beams. The energy-dissipating crash barrier includes crash barrier panels, a primary energy-dissipating device, a primary energy-dissipating channel, a reinforced concrete barrier, a secondary energy-dissipating device, a secondary energy-dissipating channel, and an elastic self-resetting device. The crash barrier panels and composite steel beams are integrally formed using precast components. The concrete bridge deck includes bridge deck concrete, transverse stiffening ribs, and longitudinal steel reinforcement bars. The composite steel beams include steel main beams, transverse diaphragms, welded studs, and a steel base plate.

[0007] The improved version features a crash barrier plate integrally formed with a steel base plate, and a secondary energy-dissipating trough is formed by bending the bottom of the reinforced concrete guardrail. The crash barrier plate is used as the outer formwork of the reinforced concrete guardrail, and the height of the crash barrier plate is between 1.2 meters and 1.5 meters.

[0008] The improved primary energy dissipation device includes a primary energy dissipation block and a primary energy dissipation block guard plate. The primary energy dissipation block is embedded in the primary energy dissipation groove to preferentially absorb and disperse the energy of impact loads. The primary energy dissipation block guard plate is used for the inner formwork of the reinforced concrete guardrail. The primary energy dissipation device is made of rubber, nylon, polyurethane foam or PVC materials.

[0009] The improved version is made by pre-embedding a primary energy-consuming block in the middle of a reinforced concrete guardrail, with one channel set in the middle; the cross-section of the primary energy-consuming channel is trapezoidal, and the cross-sectional shape of the primary energy-consuming device is consistent with the cross-section of the primary energy-consuming channel.

[0010] The improved reinforced concrete guardrail includes: guardrail concrete, transverse reinforcement 1, transverse reinforcement 2, transverse reinforcement 3, and longitudinal reinforcement. The guardrail concrete is poured on-site. The crash barrier panel and the first-level energy-dissipating block panel are used as the outer and inner formwork for the guardrail concrete construction, respectively. The load-bearing skeleton of the reinforced concrete guardrail includes transverse and longitudinal reinforcement, anchored within the guardrail concrete. Both ends of transverse reinforcement 1 are welded to the crash barrier panel. One end of transverse reinforcement 2 is welded to the crash barrier panel, and the other end is welded to the longitudinal reinforcement of the bridge deck. One end of transverse reinforcement 3 is welded to the crash barrier panel, and the other end is welded to the longitudinal reinforcement of the bridge deck. The longitudinal reinforcement and transverse reinforcement of the guardrail are tied and fixed together.

[0011] The improved secondary energy dissipation device includes a secondary energy dissipation block and openings in the secondary energy dissipation block. The secondary energy dissipation device absorbs the remaining impact energy. The secondary energy dissipation block is fixed in the secondary energy dissipation groove. The openings in the secondary energy dissipation block are evenly arranged along the longitudinal direction of the bridge, with one opening every 0.5 to 1 meter, to accommodate the elastic self-resetting device. The secondary energy dissipation device is made of rubber, nylon, polyurethane foam, or PVC material.

[0012] The improved secondary energy-consuming trough is made by directly bending the crash barrier plate to fix the secondary energy-consuming device; the cross-section of the secondary energy-consuming trough is rectangular, the secondary energy-consuming trough is arranged along the longitudinal direction of the bridge, and the trough depth is 10-30cm; the trough width is determined according to the size of the secondary energy-consuming device.

[0013] The improved elastic self-resetting device automatically restores the guardrail deformation after impact; the elastic self-resetting device is evenly arranged along the longitudinal direction of the bridge, with one device every 0.5 to 1 meter; the elastic self-resetting device uses springs, lead cores or shape memory alloy materials.

[0014] The improved composite steel beams use precast components; the main steel beams are connected to the concrete bridge deck by weld studs, which are pre-welded onto the main steel beams; the main steel beams are I-beams, box girders, or T-beams; the crossbeams are truss beams, I-beams, or T-beams.

[0015] The improved concrete bridge deck is reinforced with transverse stiffeners and longitudinal steel bars to enhance its overall strength. The bridge deck concrete is poured on-site.

[0016] The technical advantages of this utility model are as follows:

[0017] (1) Optimized construction efficiency and controllable risks: This utility model adopts a multi-level energy-consuming self-resetting anti-collision guardrail for steel-concrete composite beam bridge. The anti-collision guardrail and composite steel beam are prefabricated components and integrally formed. At the same time, the anti-collision guardrail and the first-level energy-consuming block guardrail are used as construction templates for reinforced concrete guardrails, which can shorten the construction period, simplify the process, and reduce project cost and construction risks.

[0018] (2) Improved anti-collision performance of guardrail and maintainable design: The primary energy dissipation device on the reinforced concrete guardrail first absorbs and disperses the energy generated by the vehicle impact, and then transfers the remaining energy to the secondary energy dissipation device. The built-in elastic self-resetting device automatically restores the guardrail deformation after the impact; improves the safety of the driver and reduces the damage to the anti-collision guardrail; the energy dissipation device and the elastic self-resetting device are easy to replace, reducing the need for manual maintenance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0020] Figure 1 This is a schematic diagram of a steel-concrete composite beam bridge structure for a multi-level energy-dissipating self-resetting anti-collision guardrail according to the present invention.

[0021] Figure 2 This is a cross-sectional view of a steel-concrete composite beam bridge with a multi-level energy-dissipating self-resetting anti-collision guardrail according to the present invention.

[0022] Figure 3 This is a detailed drawing of an energy-consuming crash barrier.

[0023] Figure 4 This is a detailed drawing of a primary energy-consuming device;

[0024] Figure 5 This is a detailed drawing of a reinforced concrete guardrail.

[0025] Figure 6 This is a detailed drawing of the secondary energy-consuming device;

[0026] Figure 7 This is a schematic diagram of a composite steel beam and concrete bridge deck.

[0027] The labels in the diagram are as follows:

[0028] 1 is an energy-dissipating crash barrier, 2 is a concrete bridge deck, and 3 is a composite steel beam. The energy-dissipating crash barrier 1 includes: crash barrier plate 11, primary energy-dissipating device 12, primary energy-dissipating channel 13, reinforced concrete barrier 14, secondary energy-dissipating device 15, secondary energy-dissipating channel 16, and elastic self-resetting device 17; the concrete bridge deck 2 includes: bridge deck concrete 21, transverse stiffening ribs 22, and longitudinal steel bars 23; the composite steel beam 3 includes: steel main beam 31, transverse diaphragm beam 32, weld studs 33, and steel base plate 34; the primary energy-dissipating device 12 includes: primary energy-dissipating block 121 and primary energy-dissipating block guard plate 122; the reinforced concrete barrier 14 includes: barrier concrete 141, transverse steel bar 142, transverse steel bar 243, transverse steel bar 34, and longitudinal steel bar 145; the secondary energy-dissipating device 15 includes: secondary energy-dissipating block 151 and secondary energy-dissipating block opening 152. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1:

[0031] like Figures 1-3 , Figure 7 As shown, this utility model provides a multi-stage energy-dissipating self-resetting crash barrier for a steel-concrete composite beam bridge. The structure includes an energy-dissipating crash barrier 1, a concrete bridge deck 2, and a composite steel beam 3. The energy-dissipating crash barrier 1 includes a crash barrier plate 11, a primary energy-dissipating device 12, a primary energy-dissipating channel 13, a reinforced concrete barrier 14, a secondary energy-dissipating device 15, a secondary energy-dissipating channel 16, and an elastic self-resetting device 17. The crash barrier plate 11 and the composite steel beam 3 are prefabricated components integrally formed. The concrete bridge deck 2 includes bridge deck concrete 21, transverse stiffening ribs 22, and longitudinal reinforcing bars 23. The composite steel beam 3 includes a steel main beam 31, a transverse diaphragm beam 32, welded studs 33, and a steel base plate 34.

[0032] In this utility model, such as Figure 3As shown, the crash guardrail 11 is integrally formed with the steel base plate 34, and is bent at the bottom of the reinforced concrete guardrail 14 to form a secondary energy dissipation trough 16. The crash guardrail 11 is used as the outer template of the reinforced concrete guardrail 14, and the height of the crash guardrail 11 is set to 1.5 meters.

[0033] like Figure 3 , Figure 4 As shown, the primary energy dissipation device 12 includes a primary energy dissipation block 121 and a primary energy dissipation block guard plate 122. The primary energy dissipation block 121 is embedded in the primary energy dissipation groove 13 to preferentially absorb and disperse the energy of the impact load. The primary energy dissipation block guard plate 122 is used for the inner formwork of the reinforced concrete guardrail 14. The primary energy dissipation device 12 is made of rubber, nylon, polyurethane foam or PVC material.

[0034] like Figure 3 , Figure 4 As shown, the primary energy-consuming trough 13 is made by pre-embedding a primary energy-consuming block 121 in the middle of the reinforced concrete guardrail 14, with one trough set in the middle; the cross-section of the primary energy-consuming trough 13 is trapezoidal, and the cross-sectional shape of the primary energy-consuming device 12 is consistent with the cross-section of the primary energy-consuming trough 13.

[0035] like Figure 5 As shown, the reinforced concrete guardrail 14 includes: guardrail concrete 141, transverse reinforcement 142, transverse reinforcement 143, transverse reinforcement 144, and longitudinal reinforcement 145. The guardrail concrete 141 is poured on-site. The crash barrier 11 and the first-level energy-dissipating block guardrail 122 are used as the outer and inner formwork for the construction of the guardrail concrete 141, respectively. The load-bearing skeleton of the reinforced concrete guardrail 14 includes transverse and longitudinal reinforcements, which are anchored in the guardrail concrete 141. The two ends of the transverse reinforcement 142 are welded to the crash barrier 11. One end of the transverse reinforcement 143 is welded to the crash barrier 11, and the other end is welded to the longitudinal reinforcement 23 of the bridge deck. One end of the transverse reinforcement 144 is welded to the crash barrier 11, and the other end is welded to the longitudinal reinforcement 23 of the bridge deck. The longitudinal reinforcement 145 is tied and fixed to the transverse reinforcements.

[0036] like Figure 6 As shown, the secondary energy dissipation device 15 includes a secondary energy dissipation block 151 and a secondary energy dissipation block opening 152. The secondary energy dissipation device 15 absorbs the remaining impact energy. The secondary energy dissipation block 151 is fixed in the secondary energy dissipation groove 16. The secondary energy dissipation block opening 152 is evenly arranged along the longitudinal direction of the bridge, with one opening every 0.5 meters, to accommodate the elastic self-resetting device 17. The secondary energy dissipation device 15 is made of rubber, nylon, polyurethane foam or PVC material.

[0037] like Figure 3As shown, the secondary energy dissipation trough 16 is made by directly bending the anti-collision guardrail 11 and is used to fix the secondary energy dissipation device 15. The cross-section of the secondary energy dissipation trough 16 is rectangular. The secondary energy dissipation trough 16 is arranged along the longitudinal direction of the bridge and the trough depth is 20cm. The trough width is determined according to the size of the secondary energy dissipation device 15.

[0038] like Figure 6 As shown, the elastic self-resetting device 17 automatically restores the deformation of the guardrail after impact; the elastic self-resetting device 17 is evenly arranged along the longitudinal direction of the bridge, with one device every 0.5 meters; the elastic self-resetting device 17 is made of spring, lead core or shape memory alloy material.

[0039] like Figure 7 As shown, the main steel beam 31 is an I-beam, and the main steel beam 31 is connected to the concrete bridge deck 2 by welding studs 33. The welding studs 33 are pre-welded onto the I-beam, and the crossbeam 32 is also an I-beam.

[0040] like Figure 7 As shown, the concrete bridge deck 2 is reinforced with transverse stiffeners 22 and longitudinal steel bars 23 to enhance its overall strength. The bridge deck concrete 21 is poured on-site.

[0041] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A steel-concrete composite girder bridge of a multi-stage energy-dissipating self-resetting crash barrier, characterized by, The application relates to a kind of energy dissipation crash barrier, concrete bridge deck and composite steel beam, which are combined to form a bridge structure.The energy dissipation crash barrier includes crash barrier plate, primary energy dissipation device, primary energy dissipation groove, reinforced concrete guardrail, secondary energy dissipation device, secondary energy dissipation groove and elastic self-resetting device.The crash barrier plate and the steel bottom plate are integrally formed, and the secondary energy dissipation groove is formed by bending the bottom of the reinforced concrete guardrail.The crash barrier plate is used as the formwork on the outer side of the reinforced concrete guardrail, and the height of the crash barrier plate is between 1.2m and 1.5m.

2. The steel-concrete composite girder bridge of a multi-stage energy dissipation self-resetting crash barrier according to claim 1, characterized in that, The primary energy dissipation device includes primary energy dissipation block and primary energy dissipation block guard plate.The primary energy dissipation block is embedded in the primary energy dissipation groove to preferentially absorb and disperse impact load energy.The primary energy dissipation block guard plate is used as the formwork on the inner side of the reinforced concrete guardrail.The primary energy dissipation device is made of rubber, nylon, polyurethane foam or PVC material.

3. The steel-concrete composite girder bridge of a multi-stage energy dissipation self-resetting crash barrier according to claim 1, characterized in that, The primary energy dissipation groove is formed by embedding the primary energy dissipation block in the middle of the reinforced concrete guardrail, and a groove is formed in the middle.The cross section of the primary energy dissipation groove is trapezoidal, and the cross section of the primary energy dissipation device is consistent with the cross section of the primary energy dissipation groove.

4. The steel-concrete composite girder bridge of a multi-stage energy-dissipation self-resetting crash barrier according to claim 3, characterized in that, The reinforced concrete guardrail includes guardrail concrete, transverse steel bar one, transverse steel bar two, transverse steel bar three and guardrail longitudinal steel bar.The guardrail concrete is cast in situ, and the crash barrier plate and the primary energy dissipation block guard plate are used as the formwork on the outer and inner sides of the guardrail concrete, respectively.The stress skeleton of the reinforced concrete guardrail includes transverse and longitudinal steel bars, which are anchored in the guardrail concrete.The two ends of the transverse steel bar one are welded to the crash barrier plate.The one end of the transverse steel bar two is welded to the crash barrier plate, and the other end is welded to the bridge deck longitudinal steel bar.The one end of the transverse steel bar three is welded to the crash barrier plate, and the other end is welded to the bridge deck longitudinal steel bar.The guardrail longitudinal steel bar is fixed by being tied with the transverse steel bar.

5. The steel-concrete composite girder bridge of a multi-stage energy-dissipation self-resetting crash barrier according to claim 3, characterized in that, ​ 6. The steel-concrete composite girder bridge of a multi-stage energy dissipation self-resetting crash barrier according to claim 1, characterized in that, The secondary energy dissipation device (15) includes secondary energy dissipation blocks (151) and secondary energy dissipation block openings (152), absorbs the residual impact energy; the secondary energy dissipation blocks (151) are fixed in the secondary energy dissipation grooves (16); the secondary energy dissipation block openings (152) are uniformly arranged along the longitudinal bridge direction, and one is arranged every 0.5-1 meters, and is used for placing the elastic self-resetting devices (17); the secondary energy dissipation device (15) is made of rubber, nylon, polyurethane foam or PVC material.

7. The steel-concrete composite girder bridge of a multi-stage energy dissipation self-resetting crash barrier according to claim 1, characterized in that, The secondary energy dissipation groove (16) is directly bent from the crash barrier plate (11) and is used for fixing the secondary energy dissipation device (15); the cross section of the secondary energy dissipation groove (16) is rectangular, the secondary energy dissipation groove (16) is arranged along the longitudinal bridge direction, and the groove depth is 10-30 cm; the groove width is determined according to the size of the secondary energy dissipation device (15).

8. The steel-concrete composite girder bridge of a multi-stage energy dissipation self-resetting crash barrier according to claim 1, characterized in that, The elastic self-resetting device (17) automatically restores the deformation of the guardrail after impact; the elastic self-resetting device (17) is uniformly arranged along the longitudinal bridge direction, and one is arranged every 0.5-1 meters; the elastic self-resetting device (17) is made of spring, lead core or shape memory alloy material.

9. The steel-concrete composite girder bridge of a multi-stage energy dissipation self-resetting crash barrier according to claim 1, characterized in that, The combined steel beam (3) is a prefabricated component; wherein the steel main beam (31) and the concrete bridge deck slab (2) are connected through the welding nail (33), the welding nail (33) is pre-welded on the steel main beam (31); the steel main beam (31) is an I-beam, a box beam or a T-beam; the cross beam (32) is a truss beam, an I-beam or a T-beam.

10. The steel-concrete composite girder bridge of a multi-stage energy-dissipation self-resetting crash barrier according to claim 1, characterized in that, The concrete bridge deck slab (2) strengthens the overall strength of the concrete bridge deck slab (2) through the transverse stiffening rib (22) and the bridge deck slab longitudinal reinforcement (23), and the bridge deck concrete (21) is cast in situ.

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