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Soil Spring Constants for Foundations Design

 

 

"Soil Spring Constants for Foundations Design" refers to a MS excel based spreadsheet program specifically designed to find out the soil spring constants concerning foundations toward the vertical direction (Z), together with the horizontal directions (X and Y).

 

Particularly, the soil spring constants, both at the surface and at a user input implantation depth, are examined in the analysis. Once the soil spring constants are procured from the analysis, these can then be applied instantly and provided into RISA-3D finite element analysis computer models associated with foundations, mats, and bases of pits or tanks. (Note: user guideline is given at the end of the calculation worksheet.)

 

This excel program is developed on the basis of the references described below :-

 

a. Washington State Dept. of Transportation (WSDOT) - Bridge Design Manual - M 23-50.13 (Feb. 2014)

 

b. Federal Emergency Management Agency (FEMA) Report No. 356 (Nov. 2000) - "Prestandard and Commentary for the Seismic Rehabilitation of Buildings" - Section 4.4.2.1.2
(Note: FEMA 356 supercedes FEMA 273 - "NEHRP Guidelines for the Seismic Rehabilitation of Buildings" - Oct. 1997)

c. "Foundation Analysis and Design", Fifth Edition - by Joseph E. Bowles, P.E., S.E. (McGraw-Hill, 1997)

 

d. "Vibrating Machinery Foundations on Soil (Using Frequency Dependent Criteria)" - Guideline 000.215.1233 (Aug. 18, 2005) - Fluor Corporation.

Here the instructions are given following the RISA-3D computer analysis software (by RISA Technologies, LLC) but the results can be applied in most other finite element computer analysis software programs.

 

Link for download www.civilax.com

 

Soil Spring Constants for Foundations Design
Image Courtesy: civilax.com

 

 

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