CN202688846U

CN202688846U - Pedestrian steel bridge

Info

Publication number: CN202688846U
Application number: CN2012202857006U
Authority: CN
Inventors: 刘松; 刘声树; 王炜正
Original assignee: CCCC Second Harbor Consultants Co Ltd
Current assignee: CCCC Second Harbor Consultants Co Ltd
Priority date: 2012-06-18
Filing date: 2012-06-18
Publication date: 2013-01-23
Anticipated expiration: 2022-06-18

Abstract

The utility model relates to a pedestrian steel bridge which comprises two arch ribs, wherein an upper lateral bracing is arranged between the two arch ribs; the lower end of each arch rib is provided with a lower chord; the two lower chords are in mutual parallel arrangement; a cross beam and a lower lateral bracing are arranged between the two lower chords in mutual parallel; the cross beam is provided with a bridge deck system; and a hanging rod is arranged between the arch ribs and the lower chords. The pedestrian steel bridge provided by the utility model is light in structural self-weight, is good in stability, is high in spanning capability, is small in exposed surface, is good in durability, and is easy to maintain.

Description

A kind of People's Bank of China steel bridge

Technical field

The utility model relates to a kind of People's Bank of China steel bridge.

Background technology

The sea port dock engineering is along with being the increase of leaning on the tonnage of ship, and the steel work pedestrian bridge application demand of striding greatly of crossing over mooring dolphin and dependency structure increases.At present, be widely used in the arch purlin formula People's Bank of China steel bridge of such environment, top-bottom chord adopts the same cross-sectional form, be difficult to accomplish reasonable stress and construct convenient.Member section is thin and larger with the atmosphere contact area, anti-marine salt mist corrosion ability a little less than.Used parallel rib structure form, the anti-bending strength that only relies on arch rib is resisted the beam wind load, and the section material utilization rate is low.Arch bridge rigidity web ends is born larger moment of flexure, shearing, needs to arrange very large connected node, and the web member stress distribution is uneven, and design is economical not.

Summary of the invention

Technical problem to be solved in the utility model is the deficiency that exists for above-mentioned prior art and provide a kind of right and wrong combination to couple hardness with softness and make easily People's Bank of China's steel bridge of simple-to-maintain.

The utility model is that the technical scheme that the problem of the above-mentioned proposition of solution adopts is: a kind of People's Bank of China steel bridge, comprise two arch ribs, and be provided with flat vertical connection between described two arch ribs; Every arch rib lower end is provided with a lower chord, two lower chord settings parallel to each other; Be provided with crossbeam and lower flat vertical connection between described two lower chords parallel to each other, be provided with bridge deck at crossbeam; Be provided with suspension rod between described arch rib and the lower chord.

Press such scheme, described arch rib is set to parabola shaped, and slopes inwardly and be the basket type arch structure.

Press such scheme, described suspension rod upper end and arch rib be for being articulated and connected, between suspension rod lower end and the lower chord for being articulated and connected.

Press such scheme, described suspension rod upper end is hinged by upper end bearing pin and arch rib, and upper end bearing pin axis is vertical with plane, arch rib axis place; The suspension rod lower end is hinged by lower end bearing pin and lower chord, and lower end bearing pin axis is parallel with the lower chord axis.

Press such scheme, described suspension rod is herringbone and is arranged between arch rib and the lower chord.

Press such scheme, described arch rib is hollow circular steel tube section, and described lower chord adopts the square steel box section of seal welding.

Press such scheme, described suspension rod is solid alloy steel rod.

The beneficial effects of the utility model are: 1, arch rib adopts parabola shapedly, and introversion becomes the basket type arch structure, and is stable in order to bridge lateral.2, because the vertical arch rib of bearing pin plane on being connected of suspension rod and arch rib can adapt to the longitudinal strain of bridge; Suspension rod is parallel with lower chord with the connection lower end bearing pin of lower chord, can adapt to the lateral deformation of bridge.3, arch rib is the round steel pipe cross section, and lower chord is the square steel box section of seal welding, forms the hemispherical dome general layout, and the round steel pipe cross section has the strong materials economy of bearing capacity, and the good looking appearance air resistance coefficient is little, the advantage that exposed surface area is little; The square-section have stress surface clear, be connected the advantages such as convenience, contact surface linear correlation, constructing structure be simple with the bridge floor girder system.4, suspension rod is the herringbone layout, in order to the arch rib stability in plane.5, because suspension rod adopts solid alloy round steel bar, and be replaceable material, so be beneficial to the anticorrosion and maintenance of marine environment.6, suspension rod is arranged as herringbone, is conducive to the stability in the introversion arch rib face.

Description of drawings

Fig. 1 is the facade structures schematic diagram of a kind of People's Bank of China of the utility model steel bridge.

Fig. 2 is the facade structures schematic diagram of a kind of People's Bank of China of the utility model steel bridge steel body structure.

Fig. 3 is the plane structure schematic diagram of a kind of People's Bank of China of the utility model steel bridge.

Fig. 4 is the syndeton profile of the suspension rod of a kind of People's Bank of China of the utility model steel bridge and arch rib, lower chord.

Fig. 5 is the suspension rod of a kind of People's Bank of China of the utility model steel bridge and the syndeton profile of pivot pin.

Among the figure: 1, arch rib, 2, lower chord, 3, suspension rod, 4, crossbeam, 5, upper flat vertical connection, 6, lower flat vertical connection, 7, the upper end bearing pin, 8, the lower end bearing pin, 9, longeron, 10, bridge deck.

The specific embodiment

Further specify embodiment of the present utility model below in conjunction with accompanying drawing.

Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, a kind of People's Bank of China steel bridge comprises being provided with flat vertical connection 5 between 1, two arch rib 1 of two arch ribs; Every arch rib 1 lower end is provided with 2 settings parallel to each other of 2, two lower chords of a lower chord, is provided with longeron 9 between two lower chords 2; Be provided with crossbeam 4 and lower flat vertical connection 6 between two lower chords parallel to each other 2, be provided with bridge deck 10 at crossbeam 4; Be provided with suspension rod 3 between arch rib 1 and the lower chord 2; Arch rib 1 is the hollow circular steel tube section of sealing, and lower chord 2 is the square steel box section of seal welding.

Suspension rod 3 adopts solid alloy round steel bar, and is replaceable member, the anticorrosion and maintenance in order to marine environment; Suspension rod 3 upper ends are hinged by upper end bearing pin 7 and arch rib 1, and suspension rod 3 lower ends are hinged by lower end bearing pin 8 and lower chord 2; Upper end bearing pin 7 is parallel with lower chord 2 axis, to adapt to possible direction across bridge distortion; Lower end bearing pin 8 is vertical perpendicular to plane, arch rib 1 place axis, to adapt to the longitudinal strain of bridge, upper end pivot pin 7 is vertical setting with lower end pivot pin 8, and to discharge the moment of flexure of suspension rod 3 both directions, two adjacent suspension rods 3 are the herringbone setting between introversion arch rib 1 and lower chord 2.

Arch rib 1 adopts parabola shaped, and slopes inwardly into the basket type arch structure.

Bridge span is set to 65 meters, and arch rib 1 highly is 8 meters, and arch rib 1 is selected the round steel pipe of diameter 508mm * wall thickness 14mm, and arch rib 1 inclined angle is 7 degree; Lower chord 2 is selected the square weldable steel case of wide 300mm * high 320mm, 3.5 meters of the axis centre spacings of two lower chords 2, form the general layout of hemispherical dome, spacing between two adjacent crossbeams 4 is 5.4 meters, longeron 9 is selected the welding H-bar of high 250mm * wide 120mm, suspension rod 3 is herringbone and arranges in 1 of arch rib, suspension rod 3 is selected diameter 35mm filled circles rod iron, two ends are hinged, hinged upper end, suspension rod 3 upper ends bearing pin 7 is vertical with arch rib 1 plane, and hinged lower end, suspension rod 3 lower ends bearing pin 8 is parallel with lower chord 2 axis.After above-mentioned optimization, 74 tons of full-bridge steel using amounts.

The above; only being preferred embodiment of the present utility model, is not that the utility model is done any pro forma restriction, and those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification; equivalent variations or modification all drop in the protection domain of the present utility model.

Claims

1. People's Bank of China's steel bridge comprises two arch ribs, it is characterized in that, is provided with flat vertical connection between described two arch ribs; Every arch rib lower end is provided with a lower chord, two lower chord settings parallel to each other; Be provided with crossbeam and lower flat vertical connection between described two lower chords parallel to each other, be provided with bridge deck at crossbeam; Be provided with suspension rod between described arch rib and the lower chord.

2. pedestrian overcrossing according to claim 1 is characterized in that, described arch rib is set to parabola shaped, and slopes inwardly and be the basket type arch structure.

3. People's Bank of China according to claim 1 steel bridge is characterized in that, described suspension rod upper end and arch rib be for being articulated and connected, between suspension rod lower end and the lower chord for being articulated and connected.

4. according to claim 1 or 3 described People's Bank of China steel bridges, it is characterized in that described suspension rod upper end is hinged by upper end bearing pin and arch rib, upper end bearing pin axis is vertical with plane, arch rib axis place; The suspension rod lower end is hinged by lower end bearing pin and lower chord, and lower end bearing pin axis is parallel with the lower chord axis.

5. People's Bank of China according to claim 1 steel bridge is characterized in that described suspension rod is herringbone and is arranged between arch rib and the lower chord.

6. People's Bank of China according to claim 1 steel bridge is characterized in that described arch rib is hollow circular steel tube section, and described lower chord adopts the square steel box section of seal welding.

7. People's Bank of China according to claim 4 steel bridge is characterized in that described suspension rod is solid alloy steel rod.