Period elongation on Response spectra
Posted: 27 Apr 2021, 11:06
Hi Dear all,
I am performing a dynamic Time-history analysis with SeismoStruct. Before I define the applied loads as an acceleration on the different (ground) nodes on the structure, I am using SeismoMatch to modify the original time history curve (match it to target spectrum, EC8). Everything works very nice so far, but if I now apply the modified Time history curve on the structure to get the acceration for the different storeys and want to get the response spectra, the peak is always far away from the original period T of the structure (T=0,45 s).
I have already used a few modified Time-history curves and the peak of the different response spectra always occurs too late. Here in my case, the maximum spectra occurs at T=0,7s.
Does anyone have an idea, why the peak of the response spectra for different storeys is so late and not in the range of 0,45s?
Thank you very much!
I am performing a dynamic Time-history analysis with SeismoStruct. Before I define the applied loads as an acceleration on the different (ground) nodes on the structure, I am using SeismoMatch to modify the original time history curve (match it to target spectrum, EC8). Everything works very nice so far, but if I now apply the modified Time history curve on the structure to get the acceration for the different storeys and want to get the response spectra, the peak is always far away from the original period T of the structure (T=0,45 s).
I have already used a few modified Time-history curves and the peak of the different response spectra always occurs too late. Here in my case, the maximum spectra occurs at T=0,7s.
Does anyone have an idea, why the peak of the response spectra for different storeys is so late and not in the range of 0,45s?
Thank you very much!