Since a 6-nm Cr layer against e-beam strand damage has to be considered, the resulting average bundle diameter at the plateau is ~20 nm, which is consistent with that measured in region III [20].
In straight tendons configurations of post-tensioned beams, strands are generally grouted inside the ducts to reduce the risk of corrosion and to improve the load bearing capacity at ultimate limit state.
An experimental test is performed to investigate the flexural behavior of bonded post-tensioned concrete beams under strand corrosion.
The residual flexural behavior of the locally ungrouted post-tensioned concrete beams after strand corrosion is investigated in the present study.
Transfer length was investigated using models of both a simple prismatic beam with 25 strands commonly used in laboratory research and a bulb-tee girder with 40 strands commonly used in bridge construction.
Resistance is in terms of moment capacity, with random variables taken as prestressing steel ultimate strength, concrete compressive strength, placement depth of strands, beam width, and thermal diffusivity.
7b Enhanced intensity in grazing incidence mode indicates C O bonds perpendicular to the IR beam, that is, strands lying approximately perpendicular to the tube axis.
It is found that, besides the resistance of energy-dissipating elements, beam arching action and strand catenary action are the major sources of structural capacity of a PT steel frame against progressive collapse.
With ion beam milled nanopores, DNA strands are detected, and the levels of current displacement are assigned to various degrees of strand folding.
It is demonstrated that the proposed system that features concrete topping (PS2) is lighter than the adjacent box beam system, requires fewer strands, provides shallower superstructure depths, and exhibits lower cambers for spans equal to 24.4 m and 30.5 m.
