Search found 8 matches

by mindlessflip
16 Jun 2021, 14:39
Forum: 03-Analytical/modelling capabilities
Topic: Modal Participation factor and SRSS
Replies: 3
Views: 174

Re: Modal Participation factor and SRSS

Hi @seismosoft, First of all, thank you very much for your reply. I solved the problem by myself. I originally wanted to calculate the participation function which is defined by: phi_i x r_1 I used the participation factor given from SeismoStruct and multiplied it with the deformed shape value, also...
by mindlessflip
11 Jun 2021, 12:40
Forum: 03-Analytical/modelling capabilities
Topic: Modal Participation factor and SRSS
Replies: 3
Views: 174

Modal Participation factor and SRSS

Hi dear all, I have a question about using the modal participation factors and mode shape values. As I want to use the method of SRSS to combine the response spectra for the first two Mode shapes the formula gives me: =SQRT(SUM(r_i*phi_i*S_d,a,i)^2) - From an Eigenvalue Analysis I got for my 2 dimen...
by mindlessflip
12 May 2021, 08:30
Forum: 03-Unexpected behaviour/errors
Topic: Period elongation on Response spectra
Replies: 3
Views: 977

Re: Period elongation on Response spectra

Maybe I chose a wrong way to modify my time histories to a target spectra: My idea was to use some original time histories which after using SeismoMatch fit for my target spectrum (EC8, i.e. with PGA=1,6 and max. Sa(T)=4,0). Therefore I use a few original time histories with different PGA and Sa(T) ...
by mindlessflip
12 May 2021, 08:16
Forum: 03-Analytical/modelling capabilities
Topic: Increasing Ductility Demand
Replies: 3
Views: 685

Re: Increasing Ductility Demand

Thank you very much for your quick response @huffte! The aim of my study is to check the ductility demand of the RC structure for a few time histories. Maybe then I should use the yield value of the real curve? Furthermore I wanted to ask you if there is any possibility to obtain the participation f...
by mindlessflip
11 May 2021, 16:05
Forum: 03-Unexpected behaviour/errors
Topic: Period elongation on Response spectra
Replies: 3
Views: 977

Period elongation on Response spectra

Hi dear all! As I am working with SeismoMatch to modify my original time histories I have the fallowing issue: The original time history gives me good results in obtaining my maximum spectra. For my case I have a period of the frame which corresponds to T=0,45s. As soon as I modify the original time...
by mindlessflip
11 May 2021, 09:30
Forum: 03-Analytical/modelling capabilities
Topic: Increasing Ductility Demand
Replies: 3
Views: 685

Increasing Ductility Demand

Hi dear all, I just wanted to ask if anyone could give me some advice in order to increase the ductility demand in my RC-structure using the SeismoStruct software: It´s a 3-storey frame with 3-bays in the x-direction. Column sections are modelled 30x30cm with C30/37 (con_ma) and reinf. is modelled w...
by mindlessflip
28 Apr 2021, 07:45
Forum: 04-Unexpected behaviour/errors
Topic: Period elongation on Response spectra
Replies: 3
Views: 1019

Re: Period elongation on Response spectra

Hi @huffte, First of all thank you for your quick reply. (1) 3 storey frame with nonlinear behaviour and lumped masses (=1 for Mx, My and Mz) on the edges on every floor (example of Tutorial Nr. 4 of the SeismoStruct 2021 -PDF) and Im not sure if the accelerogram has a peak at T=0,45s? Anyway I want...
by mindlessflip
27 Apr 2021, 11:06
Forum: 04-Unexpected behaviour/errors
Topic: Period elongation on Response spectra
Replies: 3
Views: 1019

Period elongation on Response spectra

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...

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