Can you please clarify how the phiVn/Vu ratio is calculated? When I had calculate this using the values provided in my output, it does not match the value shown. For example, in the output below, at 0.5L, phiVn/Vu = 1.216; however, calculating phiVn = 0.9*(Vc+Vs.reqd) = 0.9*(40.216kip + 15.388kip) = 50.04kip, and Vu = 51.663kip, therefore phiVn/Vu = 50.04kip/51.633kip = 0.98 - where Vc is the shear strength provided by the Concrete, and Vs.reqd is the shear strength provided by the stirrups (according to the variable definitions). I am trying to do a quick check on the shear load ratings using these values, and they are not matching.
Hi Vinay, why is the option given to consider the shear across failure plane when the simplified shear design procedure is used for analysis? Shouldn't it be greyed out? What is the program doing when you select simplified shear design AND check the box to include shear across failure plane in the rating tab? From my understanding the analysis and the rating (Beam) tab are doing different things.
Thanks
Hi ,
If the user has selected one of the 2 Vertical Shear Method in the Analysis TAB then the program will design the girder as per that method.
Then while rating the girder, if the user selects the FDOT alternative , then the program calculates the shear capacity as per FDOT requirements.
Program calculates the shear capacity based on what option is being selected in Analysis TAB and Rating Parameter Dialog box.
Please let me know if you need any additional information.