Hello,
We are running a modal analysis on a tank structure (modeled with shell elements. We have run several modal analyzes for the model with different mesh sizes to evaluate the mesh sensitivity. The modal analysis results appear to have similar cumulative mass participation but the...
I am designing headwall with fairly large conduit opening (8-foot diamter). The headwall has wingwalls at 45-degrees. The headwall will need to extend about 3-4 feet above the conduit per the civil grading.
I am designing the headwall above the conduit to span horizontally to the wing walls to...
Hey All,
I am designing a cast-in-place rectangular valve vault structure. Owner requested CIP instead of precast. There are several structures with different dimensions (5'x10', 5' x 15', 10' x 20'). They are 6-feet deep. They will have a non-traffic live load (300 psf). We originally designed...
Hey All,
I am curious on how others approach the design and/or analysis of wing walls (e.g., for culvert headwall) or any type of retaining wall with the height of the wall sloping downward to match the grading (varying retained back fill height). Generally what approach do you take:
1)...
Hey All,
I am working on a project in the early phases that involves slope stabilization of an embankment. There is a head wall for a twin barrel (84-inch diameter) culverts on the downstream slope of the embankment. The re-grading to stabilize the slope requires increasing the height of the...
Project Background: The project is rehabilitation of a concrete spillway at a dam. The spillway apron is being partially removed(removal of 2-3" of shotcrete surface) and removal of a minimum of 1/4" to sound concrete into the existing 18" concrete slab. This is being done via hydro demolition...
I am evaluating an existing surge tank at a hydro-plant for code compliance. The surge tank consists of steel riser and cylindrical tank with 8 built up columns supporting the tank at the springline. The columns are braced with rods and struts at 3 locations. The built-up column consists of...
