I am applying Prescribed displacement at the bottom of soil to simulate earthquake. So my static line displacement is (say) 1 m. I wanna give dynamic multiplier in the form of acceleration table. In which unit basis ('g' or 'm/s^2') I have to input my acceleration multipliers? And thus the displacement multipliers found by Plaxis from my acceleration multipliers will be on what unit? Thanks in advance
Dear Mohammed,
The units as specified in the Project Properties are used, with exception of time: in dynamics time is always in seconds.. Hence, if you specified distance in "m" and time in "s" the acceleration will be in "m/s^2". Would you specify distance in 'mm' and time in 'days' then we would use "mm/s^2" for acceleration.Please note that the multipliers have no unit, it's the dynamics component of the load that has the units. the multiplier is just a unit-less multiplier that varies in time.
With kind regards,
Dennis Waterman
Yeah.. Multipliers have no unit but it has amplitude. My doubt is, regarding prescribed displacement, the acceleration multipliers were converted into displacement multipliers (say it is in 'metre' as u said). Which would be appropriate, giving acceleration multipliers amplitude with respect to unit 'g' or unit 'm/s^2'??
I already answered that question: PLAXIS will use the units as given in the Project Properties, hence m and s. Why would you then still want to use the multiplier as a multiplier on "g" ?
Hi ,
Also, I have same problem, is it right to use 9.8 in a scale value to convert the values of the acceleration from "g" to "m/s2" ?
best regrads
Hi,
Of course, just give the Dynamic base load a value of 9.8 m/s2 and then you can use the multiplier as if it's a value in "g".