A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Wheel Load Distribution in Concrete Slab Bridges
Concrete slab bridges offer economic alternatives for short span bridges. As the bridge span length approaches forty feet, a simple span concrete slab bridge may be the preferred alternate. Generally, the design of these bridges must conform to the AASHTO "Standard Specifications for Highway Bridges" which include provisions for truck and lane loadings. The design considerations include 1) Flexural strength, 2) Shear strength, 3) Deflection due to live load, 4) Crack control, 5) Edge beam effects, 6) Distribution reinforcing, and 7) Shrinkage and temperature reinforcing. The investigations included finite element analyses, model testing and application of the AASHTO design procedures. The span lengths considered were 24 feet and 40 feet; the widths were 14 feet, 24 feet and 34 feet. The finite element analyses were performed using a commercially available finite element program and SHELL elements. These elements had five degrees of freedom at each node. The output included bending moments in two directions and deflections normal to the slab. Scale models were constructed using Portland cement concrete with the largest aggregate size approximately 3/16 in and a 28 day compressive strength of about 3500 psi. The reinforcing steel was deformed steel wire with a yield strength of 65,000 psi. Neither shrinkage and temperature nor distribution reinforcing was incorporated into the models.
Wheel Load Distribution in Concrete Slab Bridges
Concrete slab bridges offer economic alternatives for short span bridges. As the bridge span length approaches forty feet, a simple span concrete slab bridge may be the preferred alternate. Generally, the design of these bridges must conform to the AASHTO "Standard Specifications for Highway Bridges" which include provisions for truck and lane loadings. The design considerations include 1) Flexural strength, 2) Shear strength, 3) Deflection due to live load, 4) Crack control, 5) Edge beam effects, 6) Distribution reinforcing, and 7) Shrinkage and temperature reinforcing. The investigations included finite element analyses, model testing and application of the AASHTO design procedures. The span lengths considered were 24 feet and 40 feet; the widths were 14 feet, 24 feet and 34 feet. The finite element analyses were performed using a commercially available finite element program and SHELL elements. These elements had five degrees of freedom at each node. The output included bending moments in two directions and deflections normal to the slab. Scale models were constructed using Portland cement concrete with the largest aggregate size approximately 3/16 in and a 28 day compressive strength of about 3500 psi. The reinforcing steel was deformed steel wire with a yield strength of 65,000 psi. Neither shrinkage and temperature nor distribution reinforcing was incorporated into the models.
Wheel Load Distribution in Concrete Slab Bridges
Frederick, Gerald R. (author) / Tarhini, Kassim M. (author)
Eighth International Conference on Computing in Civil and Building Engineering (ICCCBE-VIII) ; 2000 ; Stanford, California, United States
2000-08-04
Conference paper
Electronic Resource
English
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