dear all;
I' m trying to distinguish between the response curves used to defined the behavior of materials in static nonlinear procedure since its obvious that the models available in materials module are cyclic response used manly to serve the goal of dynamic analysis.so I'm expecting to see some of monotonic curves account for the main phenomena in cyclic ones such degradation.
my question, dose the program calculate such curves automatically ?
the second question, how could i find the materials models used to defined the uni-axial stress-strain relationship used to calibrate the fiber element cross-section since it made up from reinforcing steel and concrete?
best,
materials models used in pushover analysis
Re: materials models used in pushover analysis
zthaer, hi.
I am not sure I fully understand your queries, hence the feedback below may not necessarily address your doubts - do let me know if that happens to indeed be the case.
Anyway, the uniaxial constitutive models available in the 'Materials' module are used for both static and cyclic/dynamic analyses alike, and they are also employed in the characterisation of the response of each fibre, the integral of which then defines the response of the cross-section as whole.
Best,
Rui
I am not sure I fully understand your queries, hence the feedback below may not necessarily address your doubts - do let me know if that happens to indeed be the case.
Anyway, the uniaxial constitutive models available in the 'Materials' module are used for both static and cyclic/dynamic analyses alike, and they are also employed in the characterisation of the response of each fibre, the integral of which then defines the response of the cross-section as whole.
Best,
Rui
Re: materials models used in pushover analysis
dear dr.rui;
in adapting the monotonic loading relationship ( used in static nonlinear ) ,most codes and regulation highlight that this relationship should account for the major and important phenomena in cyclic envelope such as degradation see figure below:
https://drive.google.com/file/d/0BzZ5tJ ... Y0ams/view
so i expect not to have the same response value even in the first loop in the stain hardening line.
best,
in adapting the monotonic loading relationship ( used in static nonlinear ) ,most codes and regulation highlight that this relationship should account for the major and important phenomena in cyclic envelope such as degradation see figure below:
https://drive.google.com/file/d/0BzZ5tJ ... Y0ams/view
so i expect not to have the same response value even in the first loop in the stain hardening line.
best,
Re: materials models used in pushover analysis
zthaer, hi.
I could not see the figure you tried to share through Google Drive, but can in any case reconfirm that in SeismoStruct the material response used for pushover analysis is the same as the one used in the first cycle of a dynamic analysis.
Degradation effects due to cyclic loading are hopefully then taken into account by the different Nonlinear Static Procedures (NSPs), which have been calibrated against the results of nonlinear dynamic analyses (in other words, the calibrated parameters in the different NSP mehtods somehow "compensate" for the lack of cyclic degradation consideration in a pushover analysis).
Best,
Rui
I could not see the figure you tried to share through Google Drive, but can in any case reconfirm that in SeismoStruct the material response used for pushover analysis is the same as the one used in the first cycle of a dynamic analysis.
Degradation effects due to cyclic loading are hopefully then taken into account by the different Nonlinear Static Procedures (NSPs), which have been calibrated against the results of nonlinear dynamic analyses (in other words, the calibrated parameters in the different NSP mehtods somehow "compensate" for the lack of cyclic degradation consideration in a pushover analysis).
Best,
Rui
Re: materials models used in pushover analysis
dr.rui , hi
yes , i was needed to hear that there is a calibrated parameters, but could you please highlight such parameters and its physical meaning, sorry to ask beyond the forum domain.
best;
thaer
yes , i was needed to hear that there is a calibrated parameters, but could you please highlight such parameters and its physical meaning, sorry to ask beyond the forum domain.
best;
thaer
Re: materials models used in pushover analysis
thaer, hi.
You may refer to the publications where different NSPs are proposed in order to better understand their calibration (a good starting point may perhaps be e.g. the FEMA-440 report).
Best,
Rui
You may refer to the publications where different NSPs are proposed in order to better understand their calibration (a good starting point may perhaps be e.g. the FEMA-440 report).
Best,
Rui
Re: materials models used in pushover analysis
dr.rui;
many thanks;
best;
thaer
many thanks;
best;
thaer