I am considering the overturning moment on a tall steel tank (12' dia. X 43' high) filled with a dry product. This is a mild seismic area, so I am using ASCE 7-05, section 12.8 to find the Cs coefficient for the seismic shear equation V=CsW. My question is, even though I have a large...
I’m analyzing a concrete tank wall, which will have different thicknesses as the wall height increases. The inside face of the wall will always be at the same plane, where as the exterior plane of the wall will “step” inward to reduce thickness.
Modeling in STAAD with plate elements, the...
Does anyone one know of any standards for design of FRP tanks for the effects of seismic loading? API 650, Appendix E covers the method for welded steel tanks. One can calculate the base shear and overturning moments and thus anchorage. API 12P (Specification for Fiberglass Reinforced Plastic...
Does anyone know of a book or design guide that offers quick solutions; i.e. base reactions, axial loads and moments due to typical applied external loads (gravity and lateral).
I'm trying to avoid lengthy hand analysis and computer methods to quickly calculate reactions/stresses in members of...
I'm in need of a good masonry design handbook that covers design of walls for both gravity and lateral loads from wind, soil, etc.
Any suggestions for a text book that has ample examples and covers code compliance, control joints, horizontal reinforcement, construction issues etc.
I was...
Please refer to Equation F2-4 and Equation F2-6 (the Fcr and Lr equation respectively) in the AISC Manual (13th Edition) - the "Design of Members for Flexure" Chapter.
Does anyone know what the "c" variable in these equations is refering to, i.e. "Jc" ? I assume it is NOT Cw the warping...
I am designing multiple steel framed structures to support equipment and piping. I am analyzing the structures in STAAD. There is debate on how to model the steel column bases: Fixed or Pinned. A truly pinned base usually results in excessive and unrealistic deflections. I have found a good...
I'm analyzing a large, multi-cell concrete tank in STAAD. I've "cut" the tank into a quadrant to make the model small enough to analyze. I feel I need to place "fixed-but" supports at the wall edges that would have been connected to adjacent walls. I think I need to provide a spring stiffnes...
Has anyone used the "Sd" factor when calculating the moment in a concrete tank wall? It seems that the "Sd" factor for flexural steel as defined in section 9.2.6 and 10.6.4 (ACI 350-06) lead to very high factored moment values. I am calculatng factors of 2.25, 1.9 and 1.7 which are used in...
Has anyone used the "Sd" factor when calculating the moment in a concrete tank wall? It seems that the "Sd" factor for flexural steel as defined in section 9.2.6 and 10.6.4 (ACI 350-06) lead to very high factored moment values. I am calculatng factors of 2.25, 1.9 and 1.7 which are used in...
