Structures Design COURSEWORK BRIEF

Solution.pdf

COURSEWORK BRIEF:

1) ROAD BRIDGE OVER RAILWAY- Full Analysis and Design of Composite Steel Bridge

Plate Girders and a reinforced concrete deck.

A Local Authority propose to develop a site at the far side of an existing overpass and existing railway from the nearest trunk road. In order to assess the feasibility of developing the site (for Industrial purposes), you have been approached, asConsultant, to provide a full design for the main span beams and slab. The proposed scheme is to be composite steel plate girders at 3 m. centres and a reinforced concrete deck, as shown in Fig. 1/001. The bridge is not to be continuous because the files necessary for the abutments and piers are in weak/stiff clays and the predic settlement of the supports is significant (say, exceeding span/1000) (Ref 1/1). To Avoid overstress, the structure should be made statically determinate by use of simply-supported spans. The bridge is to be 3 lanes, with a 2 m. pathway each side,as shown in Fig. 1/001, and the proposed scheme as shown has a minimum clearance of 5.7 m. under the existing viaduct, and has a minimum clearance under 5.0 m. to the railway tracks.

LOADING – according to BS 5400

LOADING – VARIABLE ACTION

Traffic loading to be taken as 10 kN/m2

for preliminary design. An alternative load is

to be considered, for element design, of 100 kN wheel load on a 0.3m x 0.3m. square

contact area. Footway loading is to be 5.0 kN/m2.

WIND LOADING

The Local Authority do not require a check for wind loading at this time.

LOADING - IMPACT 

It can be assumed that the leaf piers and abutments shown on Fig. 1/001 are

sufficiently far back (4.5 m.), and protected from the railway tracks for accidental

impact not to be a consideration.

LOADING – PERMANENT ACTION - SUPERDEAD

Take average characteristic loading of surfacing as 2.4 kN/m2

LOADING – PERMANENT ACTION - DEAD

Take unit weight of concrete as 24 kN/m3

LOADING ACCORDING TO BS EN CODES OF PRACTICES: need to be established

SITE CONDITIONS

Fill, alluvium and weak clay down to 12.0 m., where stiff clay (undrained Cu = 75kN/m2) was encountered to a large depth.

DESIGN CODE OF PRACTICES

Make a comparison Design using both BS 5400 Parts 3 & 5 - Composite Steel Bridgesand

BS EN 1993 part 1-1 – General rules and BS EN 198-Part 2 Steel bridge and any other

relevant BS EN codes of Practices

MATERIALS

Steel plates, EN 10025 Grade Fe 510B, fy = 355 N/mm2

Concrete deck, fck = 40 N/mm2 and for reinforcement, fy = 500 N/mm2

Marking Scheme

Tired of the boring assignments to be submitted to colleges and universities? MyAssignmentMart.com gives you multiple reasons to trust it with your orders. We employ PhD experts handpicked from prestigious universities over the globe. We cater to quality assignment help, dissertation writing services and online essay help, covering more than 100 academic subjects. We pledge to complete your assignments on time and never compromise when it comes to deadline. Our prices for assignments are the most competitive in the market and make sure the cost suits your budget.