Metal Bridge Design

Contents

1. SECTION I

1.1 DESCRIPTION OF THE DESCRIBED VERSIONS AND JUSTIFICATION OF THE ACCEPTED VERSION OF THE BRIDGE

2. SECTION II

2.1 PURPOSE OF FLOORING SHEET THICKNESS

2.2 DETERMINATION OF DESIGN VALUE OF BENDING MOMENT IN LONGITUDINAL RIBS OF ORTHOTROPIC PLATE

2.3 SELECTION OF SECTION OF LONGITUDINAL RIBS OF ORTHOTROPIC PLATE

2.4 DETERMINATION OF DESIGN FORCE FACTORS IN TRANSVERSE RIBS OF ORTHOTROPIC PLATE

2.5 SELECTION OF CROSS SECTION OF TRANSVERSE RIBS OF ORTHOTROPIC PLATE

2.6 CHECK OF OVERALL STABILITY OF ORTHOTROPIC PLATE

2.7 TEST OF LONGITUDINAL RIB ENDURANCE AT LOCAL LOAD ACTION

3. SECTION III

3.1 DETERMINATION OF DESIGN POWER FACTORS IN MAIN BEAMS OF SPAN STRUCTURES

3.2 SELECTION OF SECTION OF MAIN BEAMS OF SPAN STRUCTURE

3.3 CHECK OF STRENGTH IN LOWER EDGE OF LONGITUDINAL RIB IN ZONE OF POSITIVE MOMENTS OF MAIN BEAM IN SUPPORT SECTION

3.4 CHECK OF LOCAL STABILITY OF MAIN BEAM WALL

3.5 CALCULATION OF INSTALLATION JOINT OF MAIN SPAN BEAM

3.6 CALCULATION OF SPAN SUPPORT PARTS

4. SECTION IV

4.1 JUSTIFICATION OF ADOPTED SUPPORT STRUCTURE

1.1 Description of the considered options and justification of the accepted version of the bridge.

1. Basic Source Data

• Bridge hole - 263 m

• River category -6

• Bridge dimensions - G-16.0 + 2x1.5 m

• Temporary load - A14 and NK-80

• Design features of span structures (orthotropic slab or

reinforced concrete slab of roadway)

2. Description of accepted bridge options

Assigned 6 category

-surface height 9.5 m,

-scaffold width - 60/40 m

- minimum depth of navigation -1 .5 m

Sheet 1 shows three versions of bridges accepted for consideration according to the initial data of the task, differing in the design of span structures.

Versions of span structures of the bridge according to the 3x42 + 63 + 2x42m scheme with a total span length of 273m were accepted for development. With a distance between the coastal edges in terms of high water level of 259 m and three intermediate supports 2 m wide, the bridge opening will be 259 m, which is 1.5% less than the specified one.

Shore and intermediate supports in all versions with the same bridge schemes will be the same, which will make it possible to judge the effectiveness of the decision taken by the cost of only span structures.

In the first version of the bridge, the continuous span structure is accepted as metal with continuous three main I-beams of constant height along the length of the bridge, installed at a distance of 6.7 m from each other, with a roadway in the form of a reinforced concrete slab, which is included in the operation for the general effect of the load. The value of the console of the reinforced concrete slab of the roadway will be 3.5 m.

In the second version of the bridge, the continuous span structure is accepted as metal with continuous three main I-beams of constant height along the length of the bridge, installed at a distance of 6.7 m from each other, with a roadway in the form of an orthotropic plate, which is included in the operation for the general action of the load. The value of the console of the orthotropic roadway plate will be 3.5 m.

In the third version of the bridge, the continuous span structure is accepted as metal with continuous two main box beams of constant height along the length of the bridge with a width of 3 m, installed at a distance of 7.4 m between each other, with a roadway in the form of an orthotropic plate included in the operation for the general action of the load. The value of the console of the orthotropic roadway plate will be 3.5 m.

Курсовой стальной.dwg