N sa – Nominal material (steel) strength of the group of anchor in lbĪ se,N – Single anchor bolt’s effective cross section area (to be obtained from manufacturer’s catalog) in square inchį uta – Specified tensile strength for a single anchor (to be obtained from manufacturer’s catalog) in psi Φ – Strength reduction factor and its value for ductile anchor bolt in tension is 0.75 Steel strength in tension, φN sa = φnA se,Nf uta…………………….D-3
STRENGTH CALCULATION OF STEEL TANKS CODE
The calculation of steel strength of anchor in tension according to the ACI code goes like below: Part-8: Interaction of Tensile and Shear Forces Part-7: Determining Concrete Pryout Strength of Anchor in Shear Part-6: Determining Concrete Breakout Strength of Anchor in Shear Part-5: Determining Steel Strength of Anchor in Shear Part-4: Determining Side-face Blowout Strength of Anchor in Tension Part-3: Determining Concrete Pullout Strength of Anchor in Tension
Part-2: Determining Concrete Breakout Strengths of Anchor in Tension Part-1: Determining Steel Strength of Anchor in Tension (presently we are here ) We will start with the anchor diameter of 0.75 inch and do the design calculations through the following eight parts: If they are then we will declare that the selected bolt size is safe or else we will go for next higher size of the anchor bolts. The aim of this whole exercise is to calculate the design tensile strength and design shear strength of the group of anchor for a selected anchor bolt diameter and check if the design strengths are higher than the applied loads. Also assume that the column is mounted at the corner of a large concrete slab. Consider the factored tensile load as 20000 lb, factored shear load as 2300 lb and compressive strength of the concrete as 3500 psi.
See the above two figures (Fig.1 and Fig.2) and design the cast in place anchor bolts according to the arrangement shown.
STRENGTH CALCULATION OF STEEL TANKS SERIES
This series of eight articles will cover all the design guideline of the ACI code with the help of the following concrete anchor foundation bolt design calculation example:įig.1: Anchor Bolt design Example Plan Viewįig.2: Anchor Bolt design Example Elevation The American Concrete Institute (ACI) 318 Appendix D has extensive guidelines for designing concrete anchor bolts. Anchor bolts are used extensively as foundation bolts for rotating equipments like machines and structural members like towers.
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