A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Friction Losses in Unbonded Post-Tensioning Tendons
An important factor to be considered in the design of prestressed concrete pavements is the effective level of prestressing that the concrete feels. The effective prestress level must be high enough to prevent detrimental tensile stresses from developing in the concrete under service loads. The study investigates the amount of the initial prestressing that is lost due to friction along the length of the post-tensioning tendons. Knowing the amount of friction losses that occur is essential in order to determine the effective prestress force at any point along the tendon. Experimental tests were carried out on four test slabs with different configurations of unbonded post-tensioning tendons. The calculated losses were used to predict losses that would occur in an actual prestressed pavement. Friction losses measured during post-tensioning of the actual pavement were then compared to the calculated losses.
Friction Losses in Unbonded Post-Tensioning Tendons
An important factor to be considered in the design of prestressed concrete pavements is the effective level of prestressing that the concrete feels. The effective prestress level must be high enough to prevent detrimental tensile stresses from developing in the concrete under service loads. The study investigates the amount of the initial prestressing that is lost due to friction along the length of the post-tensioning tendons. Knowing the amount of friction losses that occur is essential in order to determine the effective prestress force at any point along the tendon. Experimental tests were carried out on four test slabs with different configurations of unbonded post-tensioning tendons. The calculated losses were used to predict losses that would occur in an actual prestressed pavement. Friction losses measured during post-tensioning of the actual pavement were then compared to the calculated losses.
Friction Losses in Unbonded Post-Tensioning Tendons
B. W. Dunn (author) / N. H. Burns (author) / B. F. McCullough (author)
1986
68 pages
Report
No indication
English
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