structeng24
Structural
- Sep 27, 2010
- 25
A while back somebody asked this question and the thread has been closed. I was curious if anyone knew the answer to this question? It is shown below:
"We are performing construction services for a project on which we also performed the design. The superstructure is comprised of prestressed concrete, adjacent BI-48 box beams. Based on NJDOT specifications, the fabricator is to design and detail the transverse post tensioning rods/strands and all anchorage details. The typical detail has a 3" diameter sleeve in the beam to accommodate the transverse ties with a steel washer plate over the opening (typically 6"x6"x3/4"). We have received the calculations and for the steel washer plate the contractor calculated the required thickness to satisfy shear requirements based on the following calculation: Shear area =Pi*3"(diameter of sleeve)^2/4 * plate thickness * sqrt(2)My question is if bending of the plate should also be considered. Anyone have experience designing the steel washer plate for this type of bridge?"
-Thank you
"We are performing construction services for a project on which we also performed the design. The superstructure is comprised of prestressed concrete, adjacent BI-48 box beams. Based on NJDOT specifications, the fabricator is to design and detail the transverse post tensioning rods/strands and all anchorage details. The typical detail has a 3" diameter sleeve in the beam to accommodate the transverse ties with a steel washer plate over the opening (typically 6"x6"x3/4"). We have received the calculations and for the steel washer plate the contractor calculated the required thickness to satisfy shear requirements based on the following calculation: Shear area =Pi*3"(diameter of sleeve)^2/4 * plate thickness * sqrt(2)My question is if bending of the plate should also be considered. Anyone have experience designing the steel washer plate for this type of bridge?"
-Thank you
