A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Alternative and Cost-Effective Bridge Approach Slabs
The main purpose of the project Bridge Approach Slabs for Missouri Department of Transportation (MoDOT) - Looking at Alternative and Cost Efficient Approaches was to explore the usage of alternate innovative structural solutions to reduce the cost of construction when a bridge approach slab (BAS) is needed. The primary objectives of the proposed project are to a) Investigate and recommend alternative design solutions with the aim to reduce the cost of construction of a bridge approach slab and b) Develop remedial measures or alternative designs for a replacement. MoDOT currently uses two types of approach slabs namely, the Standard BAS, which is a twenty five feet span, twelve inch thick slab resting on the abutment at one end and connected to a sleeper slab with dowel rods at the pavement end and the Modified BAS which is similar in geometry to the Standard BAS but has approximately half the reinforcing steel and does not rest on a sleeper slab at the pavement end. Current costs of the Standard BAS have been calculated to be approximately $55,500. This project has developed three alternative design solutions all of which are over twenty percent less expensive than the current designs. The three solutions presented are (a) 12 inch thick cast in place (CIP) slab of 20 feet span with a sleeper slab support (b) 12 inch thick CIP slab of 25 feet span with no sleeper slab support and (c) 10 inch thick precast, prestressed slabs with transverse ties and a span of 20 feet for new construction and of 25 feet for replacement.
Alternative and Cost-Effective Bridge Approach Slabs
The main purpose of the project Bridge Approach Slabs for Missouri Department of Transportation (MoDOT) - Looking at Alternative and Cost Efficient Approaches was to explore the usage of alternate innovative structural solutions to reduce the cost of construction when a bridge approach slab (BAS) is needed. The primary objectives of the proposed project are to a) Investigate and recommend alternative design solutions with the aim to reduce the cost of construction of a bridge approach slab and b) Develop remedial measures or alternative designs for a replacement. MoDOT currently uses two types of approach slabs namely, the Standard BAS, which is a twenty five feet span, twelve inch thick slab resting on the abutment at one end and connected to a sleeper slab with dowel rods at the pavement end and the Modified BAS which is similar in geometry to the Standard BAS but has approximately half the reinforcing steel and does not rest on a sleeper slab at the pavement end. Current costs of the Standard BAS have been calculated to be approximately $55,500. This project has developed three alternative design solutions all of which are over twenty percent less expensive than the current designs. The three solutions presented are (a) 12 inch thick cast in place (CIP) slab of 20 feet span with a sleeper slab support (b) 12 inch thick CIP slab of 25 feet span with no sleeper slab support and (c) 10 inch thick precast, prestressed slabs with transverse ties and a span of 20 feet for new construction and of 25 feet for replacement.
Alternative and Cost-Effective Bridge Approach Slabs
G. Thiagarajan (author) / C. S. Gopalaratnam (author)
2010
251 pages
Report
No indication
English
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