precast78
Structural
- Aug 12, 2013
- 82
Hello, I was assigned to help design a small plastic structure. My background is more in concrete. I modeled the structure using FEA. The structure will be buried and loaded with soil cover and vehicle load. My questions are the following:
1. What shall I use as my limiting factor? Shall I use the yield strength of the material? Do I add some kind of reduction factor to account for creep? Is there a design book I can follow?
2. When I design concrete we typically factor the load instead of Factor of Safety. The load factors are determined by AASHTO. From what I see so far, most people use unfactored load and use factor of safety to design plastic. How do you determine the Factor of Safety?
Thank you!
1. What shall I use as my limiting factor? Shall I use the yield strength of the material? Do I add some kind of reduction factor to account for creep? Is there a design book I can follow?
2. When I design concrete we typically factor the load instead of Factor of Safety. The load factors are determined by AASHTO. From what I see so far, most people use unfactored load and use factor of safety to design plastic. How do you determine the Factor of Safety?
Thank you!