Concrete platform with vibrating machines instaled above it
Also, are these mixers at ground level? So far I am assuming they are, a little more detail of the site situation will help give you a more accurate answer.
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5.1. Your case is is a table-top 2. Use SAP2000 to run time-history 3. Model plate as shell element and column as beam element 4 Make sure the main modes' frequencies (>95% participation) are +/- 20% away from machine speed 5. Check the amplitude 6.The conventional procedure is to define the machine loads as static distributed loads that comprises of the weight of the machine and a percentage for the dynamic effect due to the operation of the machine (vibration). If possible, provide dampers and or isolation pads to separate the machine from the structural frame work of the building. For the type of installation that you described, total live load of 8KN/m^2 should be ok. Check the platform and support structures (beams, columns and slab) for deflection, crack width etc. For further clarification, refer to “Reinforced concrete designer’s handbook” by REYNOLDS 7.list all data then we can help.
is this a table top ? make sure slab weight is big enough. etc
looks a simple job to do. you can do it in staadpro. no fancy calcs needed.
also needs soil data for foundation springs calcs.
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