I am a structural engineer with a large firm involved in the design of tall buildings. This past Friday I gave an in-house presentation on the "Analysis, Design and Detailing of Concrete Connections and Joints". the lecture dealt with beam-beam and beam-column connections under extreme...
The most important part of designing mat foundations is calculating the values for the nodal spring constants (Modulus of Subgrade Reaction MSGR, force/cubic foot typ.)This value can be obtained from a Geotecnical engineer, By the results of plate load tests, by typical published values or by...
I would suggest using any FEA software like SAFE or RISA3D. Whatever means you use, be sure to accurately account for the effect of openings near column supports (i.e. reduced punching shear capacity). Since design for punching shear typically assumes that the loads come in from all directions...
There is a program called "PCAcol" by The Portland Cement Association. It provides interaction diagrams for biaxially loaded, irregularly shaped sections with irregulat reinforcement layouts
