Those who are working on SAP2000 and knows hysteresis curve.Or anybody studying in seismic analysis in SAP2000
Dear Vishvas Patil,
Based on my experience using SAP2000, you need to define nonlinear hinges on elements (beam, columns, or bracings) before the analysis using the menu define -> frame sections -> nonlinear hinges. After the analysis finished, you can extract the hysteresis data on the hinge from show table menu, there is a menu called hinge states. However, if you are using link element, it can be easier to plot. You can only use menu plot function to get the hysteresis curve of your link, define the local coordinate of your link and local force and the hysteresis curve will be shown directly for each link.
Best regards,
Andri Setiawan
Hello,
One can use Hinges or Links. Both can be used to model localized nonlinear behavior, but for getting Hysteresis curves links would be more appropriate.
Hinges are suitable for pushover analysis since hinge state may be displayed graphically for each pushover increment. Hinge properties may be entered manually, or automatically, according to code guidelines. Multiple hinges may be assigned along element length to simulate the distribution of plasticity along the member.
Links are more complex and provide more modeling features, including energy-dissipation capability, various hysteresis models, and advanced seismic properties as isolation and Wen plasticity. Hysteretic behavior may be specified for multiple DOFs within a single link, which cannot be done with hinges. Links are independent objects which do not require association with a frame element. Various link properties are available for modeling steel, concrete, and several types of bearing behavior.
Hello,
One can use Hinges or Links. Both can be used to model localized nonlinear behavior, but for getting Hysteresis curves links would be more appropriate.
Hinges are suitable for pushover analysis since hinge state may be displayed graphically for each pushover increment. Hinge properties may be entered manually, or automatically, according to code guidelines. Multiple hinges may be assigned along element length to simulate the distribution of plasticity along the member.
Links are more complex and provide more modeling features, including energy-dissipation capability, various hysteresis models, and advanced seismic properties as isolation and Wen plasticity. Hysteretic behavior may be specified for multiple DOFs within a single link, which cannot be done with hinges. Links are independent objects which do not require association with a frame element. Various link properties are available for modeling steel, concrete, and several types of bearing behavior.
Vagelis Plevris
Hello,
Thank you, Dr. Vagelis Plevris for your precious comments. I have one more question. Could you please show me how to implement link element parameters as Wen but the hysteric behavior is asymmetric not symmetric case but it is similar to Wen link element.
Abdelkader Benyoucef
Hi Abdelkader,
I am afraid that Bouc-Wen link-type in SAP2000 is only able to model the symmetric behavior of hysteresis loops. I suggest you to use multi-linear link element if you have asymmetrical hysteresis shape in tension and compression. I believe it help to solve your problem.
Regards,
Andri
If you want to simulate viscous damper or base isolation, you can do it by link element. Please note that, you must have reasonable magnitudes for all property. After assigning related properties, you need to do non-linear time history analysis with appropriate earthquake data. After that, you can easily plot force Vs displacement and get your desired hysteresis curve.
Hope this helps.
Vishvas Patil ...Good question… Please check references below.. hope it will be helpful for you…
Regards…
http://digital.library.ryerson.ca/islandora/object/RULA:1240/datastream/OBJ/download/Comparison_of_analysis_techniques_for_the_seismic_evaluation_of_an_88-storey_concrete_building.pdf
Its Too Easy !
Home > Display > More > Show Plot Functions.
first run nonlinear analysis to generate the data necessary for plotting link hysteresis.
Once analysis is complete, users should define two plot functions, one for link deformation, and one for link force. These plot functions are generated as follows:
On the Plot Function Trace Display Definition menu, select Define Plot Functions.
Select Add Link Forces/Deformations > Add Plot Function.
Specify a link label, along with the desired component and type of plot function.
Select OK to save the definition.
Select the defined plot function, then select Modify/Show Plot Function to assign such custom names as DEFORMATION for link deformation and FORCE for link force,
Can anyone provide me with a summary of existing hysteresis models in the literature?
Regards
Hi
For Plotting link hysteresis, follow the below step by step instruction :
- Select Display > Show Plot Functions.
- On the Plot Function Trace Display Definition menu, select Define Plot Functions.
- Select Add Link Forces/Deformations > Add Plot Function.
- Specify a link label, along with the desired component and type of plot function.
- Select OK to save the definition.
- Select the defined plot function, then select Modify/Show Plot Function to assign such custom names as DEFORMATION for link deformation and FORCE for link force.
- Select deformation as the horizontal plot function and force as the vertical plot function.
- Finally, select Display to display the hysteresis curve.
Hi
I think the issue might have been solved. But for some reasons, you may need to refer to the following link from csi wiki to plot the link hysteresis (e.g. using SAP2000)
https://wiki.csiamerica.com/display/kb/Plotting+link+hysteresis
Excuse me, how can I display 'Link force-deformation' in ETABS after conducting nonlinear time history analysis?
- Badges
- Science topic
- Similar topics
- Phytochemistry
- Extracts