cancmm
Structural
- Dec 4, 2009
- 93
Hello all,
General question for you:
Say a seismic analysis was required for a bridge designed per AASHTO LRFD. The bridge consists of a standard concrete deck over precast girders, supported on a pier-type bent where the foundation extends roughly 50' below ground. What would be the "tributary permanent load" for this system? Am I correct in saying that you only account for half the pile length above the point of fixity of the pile? Subsequently, I would think that you would increase the depth of fixity due to liquefaction and increase the tributary permanent load accordingly. Seem ok?
General question for you:
Say a seismic analysis was required for a bridge designed per AASHTO LRFD. The bridge consists of a standard concrete deck over precast girders, supported on a pier-type bent where the foundation extends roughly 50' below ground. What would be the "tributary permanent load" for this system? Am I correct in saying that you only account for half the pile length above the point of fixity of the pile? Subsequently, I would think that you would increase the depth of fixity due to liquefaction and increase the tributary permanent load accordingly. Seem ok?
