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  1. dynamicd

    Dynamic Analysis of Foundation on soild rock

    I would like to know if we are analysing and designing foundation of elevated centifugal machine supported on solid rock, (and no soil layer), What are the soil spring constants to be used? As rock is lava derived and foundation is kept after blasting, I presume there is no damping effect to...
  2. dynamicd

    Vibrating foundation on solid rock

    I would like to know if we are analysing and designing foundation of elevated centifugal machine supported on solid rock, (and no soil layer), What are the soil spring constants to be used? As rock is lava derived and foundation is kept after blasting, I presume there is no damping effect to...
  3. dynamicd

    How to use frequency dependent soil siffnesses in Dynamic analysis ?

    Currently I am designing concrete elevated frame type centrifuge machine (high speed as 60 cps) foundation and geotech report has given us frequency dependent soil stiffnesses. Geotech report shows that vertical stiffness gets in negative values after 30 cps for that perticular soil...

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