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Accelograms.......
Hi......
I have a accelaration vs time data for an earthquake. But I need velocity vs time data for an earthquake for dynamic analysis of a structure with this earthquake as input. The intrgration of accelaration is velocity. How I can integrate this numerical data? I have an idean about Newmarks beta method but how to use it? I have no idea. Is there any further simple method to do this? Is there any reference book or journal or link available for this?
Thanks in advance......
Sreenu
Forums:
Why do you need velocity
Why do you need velocity diagram? For Newmark integration is possible to use accelerograms. I think, it is better to have accelerograms because, it is easy to compute nodal load forces.
Hi Yes always it is
Hi
Yes always it is the accelaration vs time graph or data used, but I was going through one article where the author used velocity for calculating nodal load forces. SO, I was thinking on how to convert the acceleration data to velocity data. I thinked over it, its simple I believe. We can integrate the data to convert into velocity. WE can use simpsons rule, trapezoidal rule etc. The Newmark beta technique is the best.........
With regards
Inspiration and genius--one and the same.
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Siva Srinivas Kolukula
Junior Research Fellow
Noise
Hi Siva,
I think the newmark method only works if your accelogram data is free of noise. That is rarely the case due to the limitation of the equipment. I have included the link of two papers I coauthored, which I think may be relevant to you. I hope you would find it useful.
http://www.stanford.edu/~borja/pub/jgr2008(1).pdf
http://www.stanford.edu/~borja/pub/ag2007(2).pdf
Best Regards,
WaiChing