Reinforced Concrete solid design using Stress analysis
Reinforced Concrete solid design using Stress analysis
(OP)
Hi I am using ROBOT and have a volumetric solid which has to be designed. The output of of solid elements are stresses however how would one design the reinforcement when the condition is not beam flexure theory? I see there is an ACI method using stress analysis, does anyone have any examples of this method utilized in any codes??
Any help or tips would be appreciated
Regards
Byron
Any help or tips would be appreciated
Regards
Byron





RE: Reinforced Concrete solid design using Stress analysis
RE: Reinforced Concrete solid design using Stress analysis
If your structure is 'beam' like but modelled using solid elements, could you calculate sectional forces from stresses (i.e. cut your beam with a perpendicular plane and integrate the stresses to get forces and moments about its centroid). This is a very rough approach, but might give you some idea.
The international federtinon for structural concrete (CEB - FIB) has issuen a bulletin / state of the art report regarding this issue:
No. 45. Practitioners' guide to finite element modelling of reinforced concrete structures
and it has sections dealing with reinforcement calculations based on 3d stress analysis (I have not used it so cannot comment).
RE: Reinforced Concrete solid design using Stress analysis
The design is for a capping beam for a quay wall. The Capping beam includes service tunnels and is supported on the caisson walls. I have been looking at an envelope of forces consisting of Bollard pull, fender load, crane load, shrinkage and differntial temperatures. The stresses show tensions at the top and bottom of the section of the beam with localised patches of tension. I have taken a step back and calculated alot by hand, however I would like to know how one designs the reinforcement to an almost patch like arrangement of stress. Tomorrow ill post an image.
I have integrated the the the stress and determined the reinforcement in direct tension, additionaly checked for cracking. However I do feel this is conservative.
I will try and get that book practitioners guide. I just find its odd how many people use FEA but dont know how to design the reinforcement if the gradient is not clear showing obvious bending.
Thanks