← AStrutTie blog archive (2016–2017)

Technical Support – Foundation on Rock

2017-03-20

Archive — originally published on the AStrutTie blog (2016–2017), restored as written. For current theory, code guides and worked examples see Learn.

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This design example is based on a question asked by our customer, it is about strut-tie model of rock foundation supporting load in uplift. The geometrical shape of the foundation is shown in the following figure.

This example requires two truss analyses to include main tension reinforcements in strut-tie model. The design procedure for this example is as follows.

Step 1 : Construct the strut-tie model excluding elements representing main tension reinforcements according to compressive principal stress flow.

Step 2 : After performing the truss analysis, find the vertical reactions at nodes 1 and 2.

Step 3 : After adding the element representing main tension reinforcements in the strut-tie model, the reactions determined in the above model are loaded.

Step 4 : After performing the analysis of modified strut-tie model, perform strength verification of struts, ties, and nodal zones.


 

Example File Downloads : Foundation_on_Rock.stm

10 figure(s) from the original post could not be recovered (the original server was retired and the Wayback Machine did not archive them). Text is as originally published.

Original URL: http://astruttie.aroad.co.kr/index.php/2017/03/20/astruttie-strut-and-tie-technical-support-foundation-on-rock-design-example/