ACI 318-19 Spread Footing Design Calculator
The SkyCiv Spread Footing Design Calculator is developed to assist in designing isolated concrete spread footings (also know as pad footings). Het kan worden gebruikt in plaats van traditionele spreadsheets voor het ontwerpen van voetplaten. Deze gebruiksvriendelijke en gratis calculator evalueert funderingen die worden blootgesteld aan axiale krachten, transversaal (horizontale) schuintrekken, and bending moment of either axis for both reinforced and mass concrete footings. De fundering wordt gecontroleerd op axiale kracht, zowel bij compressie als bij trek (verheffen) in overeenstemming met de ACI 318-19. The Spread Footing Software considers the stability checks for soil bearing on the footing subject to vertical load and biaxial moments. Daarnaast, it performs the concrete design based on the Ultimate Strength Design Method of the ACI 318-19.
Over de ACI 318-19 Spread Footing Calculator
What Inputs are Required?
Various inputs are required to complete the design checks for the pad footings. De ingangen omvatten:
- Footing Dimensions and Material
- Bezig met laden
- Concrete Properties
- Wapeningseigenschappen
- Geotechnische parameters
Zodra alle invoergegevens zijn ingevuld, klikt u op de "Klik op" button in the top right to complete the spread footing design.
Does the Spread Footing Calculator include Stability Checks?
The program considers the stability checks for soil bearing on the footing subject to vertical load and biaxial moments. Daarnaast, it performs the concrete design based on the Ultimate Strength Design Method in accordance with ACI 318-19. The soil pressures are calculated using the solution of Bellos and Bakas and the footing is assumed to be perfectly rigid with constant thickness. The pressures may also be calculated when only a part of the footing is in contact with the soil. This is especially useful for footings with small vertical loads and large moments, such as the case of footings at the corners of buildings under lateral loads.
Spread Footing Loading
This spread footing calculator allows the input of lateral loads (schaar en moment) and it can deal with four load cases (dode lading, live load, roof live load, en wind of een ander zijdelings belastinggeval). The user should check the load combination factors of the table and add or modify them accordingly to the adopted loading code. The weight of the pedestal is added to the specified dead load and therefore all factors included in the combinations will affect this load.
Which Spread Footing Checks are Completed?
Maximum eccentricity, kantelen, and sliding checks are performed by this spread footing software. The last check does not include the passive pressure contribution. Het is altijd wenselijk om concentratie van spanningen in de bodem te vermijden en daarom heeft het programma een waarschuwingsstatus wanneer de resultante zich buiten het middelste derde deel van de fundering bevindt. In extreme cases where the load eccentricity generates ratios of maximum stress vs. mean stress greater than 6, the spread footing program triggers an error due to the large concentration of stresses and possible large rotation of the footing. In dergelijke gevallen, the user is advised to enlarge the footing to have a better distribution of stresses or use other solutions as strap footings are not considered in the scope of this tool.
