A prefabricated box girder bridge and its anti-seismic structure
An anti-seismic structure and prefabricated technology, applied in the direction of bridges, bridge materials, bridge construction, etc., can solve the design method of reinforced concrete lateral limit stoppers, the detailed structure and its performance objectives, clearly stipulate, ignore the design of stoppers, and cannot Give full play to the block function and other issues to achieve the effect of ensuring the ability to resist shear damage, ensuring the ability to resist damage and improving the ability to resist shear damage
Active Publication Date: 2021-09-24
CHANGAN UNIV
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Problems solved by technology
Among the current seismic codes for bridges, important codes such as "Detailed Rules for Seismic Design of Highway Bridges", "Code for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts", "Code for Seismic Resistance of Highway Engineering" and other important codes do not have detailed specifications for reinforced concrete transverse limit stops. The design method, detailed structure and performance goals are clearly stipulated, and it is only used as a structural measure, which leads to bridge engineering personnel ignoring the design of the stopper and failing to give full play to the role of the stopper
Method used
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Embodiment
[0048] The anti-seismic structure of the assembled box girder bridge of the embodiment of the present invention includes a block 1, a vertical bar 2, a diagonal bar 3, a foot 4, a skeleton pressure bar 5, a skeleton tie rod 6, a skeleton large beam 7, a skeleton brace 8, and a small skeleton Crossbeam 9, skeleton longitudinal beam 10he skeleton longitudinal brace 11. See details Figure 1~Figure 5 And Figure 6(a) ~ Figure 6(c). like figure 1 As shown, the block 1 is located on both sides of the cover beam 19 , and the outer edge of the block 1 is flush with the edges at both ends of the cover beam 19 . A rubber pad 20 of 200×200×20 mm is pasted on the block 1, and two rubber pads 20 are arranged on one side of one block. like Figure 3~Figure 5 And as shown in Figure 6(a)~Figure 6(c), the vertical bar 2, the oblique bar 3, the feet 4, the skeleton pressure bar 5, the skeleton tie rod 6, the skeleton large beam 7, the skeleton diagonal brace 8, the skeleton small beam 9, T...
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The invention discloses an assembled box girder bridge and its anti-seismic structure. The anti-seismic structure includes stoppers located on both sides of the cover girder. The steel frame is welded by a number of side-by-side steel frame pieces through the frame longitudinal beam and the frame longitudinal diagonal brace. The structure of the steel frame sheet and the steel frame of the present invention ensures that the block can bear a relatively large tensile force toward the inner side of the cover beam, and bears relatively large pressure toward the outer side of the cover beam, thereby improving the direction of the block toward the cover. The anti-shear failure ability of the oblique section in the beam direction; several steel skeleton pieces arranged side by side in the steel skeleton are connected through the skeleton longitudinal beams and the longitudinal diagonal braces of the skeleton, which can make the connection between the steel skeleton pieces reliable and strong in impact resistance. This ensures the overall shear failure resistance of the block and improves the seismic performance of the bridge.
Description
technical field [0001] The invention relates to the field of bridge engineering, in particular to an assembled box girder bridge and its anti-seismic structure. Background technique [0002] Bridge limit stops refer to the block walls set on both sides of the bridge deck to prevent falling beams. For places where the earthquake is more serious, stoppers are also set between the beams to block the beams to prevent lateral movement. For trapezoidal and rectangular sections, it depends on the beam section. Reinforced concrete retaining blocks are widely used in domestic girder bridges, but the industry currently only regards retaining blocks as structural measures and does not participate in force analysis, and there are no clear regulations on the form and size of retaining blocks. At present, there are only principled regulations in highway seismic codes: in areas where the seismic fortification intensity is greater than or equal to 7 degrees, "for simply supported beam (sl...
Claims
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IPC IPC(8): E01D19/02E01D2/04E01D101/26E01D101/30
CPCE01D2/04E01D19/02E01D2101/26E01D2101/268
Inventor 王业路周勇军赵煜沈传东孙楠楠周先功
Owner CHANGAN UNIV
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