How does the program define the tension limit under the AASHTO LRFD 2007 principal check request in bridge design? Which formula does SAP2000 use?
The tension limit is calculated from the specified concrete compressive strength, f’_c (this is defined on the “Material Property Data” form), and a “Ten Lim” factor (this is defined on the “Superstructure Design Request” form) as a sqrt{f’_c} multiplied by the “Ten Lim” factor. Please note that the “Ten Lim” factor depends on the units used. The default value for ksi units is 0.19, while the default value for MPa units is 0.5.
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