Search found 10 matches
- Sun Mar 27, 2022 8:07 am
- Forum: OpenSees.exe Users
- Topic: Hysteretic Material
- Replies: 12
- Views: 10260
Re: Hysteretic Material
Yes that should theoretically work, you need to check the resulting force displacement though Hello, when I used this way for considering fixed and expansion bearing, many of hysteretic materials about 196 utilized on case of bridge in which created instability of structure. what do I do? do instab...
- Sun Mar 27, 2022 7:56 am
- Forum: OpenSees.exe Users
- Topic: Tangent Stiffness Proportional Damping on Updated Frequencies
- Replies: 4
- Views: 11403
Re: Tangent Stiffness Proportional Damping on Updated Frequencies
To be able to use tangent stiffness proportional damping, you need to use $betaK or $betaKcomm, where $betaKcomm is preferred for numerical purposes and better convergence. Instead of computing $betaKcomm for each time step and instantaneous frequency, you can approximately compute it for an elonga...
- Sat Sep 11, 2021 12:14 am
- Forum: OpenSees.exe Users
- Topic: Hysteretic Material
- Replies: 12
- Views: 10260
Re: Hysteretic Material
Salutes to you
How do I use the best possible mode from hysteretic material during performing time history analysis in the bridge model (i.e stability test described in workshop's ‪Frank McKenna)?
Crated instability (dt=0.005, dt= 0.00001) in owing to it.
How do I use the best possible mode from hysteretic material during performing time history analysis in the bridge model (i.e stability test described in workshop's ‪Frank McKenna)?
Crated instability (dt=0.005, dt= 0.00001) in owing to it.
- Sat Jun 26, 2021 11:29 pm
- Forum: OpenSees.exe Users
- Topic: nonlinear time history analysis
- Replies: 12
- Views: 11941
Re: nonlinear time history analysis
If you want an identical analysis time step for all motions, you can use the smallest, which is 0.004 sec. But if there is no specific reason for running all with the same analysis step, you can run each with the corresponding ground motion step. What is the period of your structure? salutes to dea...
- Thu Jun 03, 2021 4:45 am
- Forum: OpenSees.exe Users
- Topic: nonlinear time history analysis
- Replies: 12
- Views: 11941
Re: nonlinear time history analysis
Hello
I have 40 records with different time-steps [0.02 sec, 0.005 sec,0.004 sec], what is the best identical time-step for all records to perform the transient analysis?
I have 40 records with different time-steps [0.02 sec, 0.005 sec,0.004 sec], what is the best identical time-step for all records to perform the transient analysis?
- Sat May 29, 2021 8:17 pm
- Forum: OpenSees.exe Users
- Topic: groundmotion and uniformexitation.
- Replies: 8
- Views: 8998
Re: groundmotion and uniformexitation.
Hello, I am performing nonlinear time history analysis on the bridge with SSI(Structure-Soil Interaction).this work is conducting by Multiple-Support excitation{ground motion-impose}. how can I use of acceleration.txt file or velocity.txt file or dispalecement.txt file cause some resources recommen...
- Sat May 29, 2021 12:17 am
- Forum: OpenSees.exe Users
- Topic: Imposed displacement time series ground motion
- Replies: 3
- Views: 4833
Re: Imposed displacement time series ground motion
Hello, I am performing nonlinear time history analysis on the bridge with SSI(Structure-Soil Interaction).this work is conducting by Multiple-Support excitation{ground motion-impose}. how can I use of acceleration.txt file or velocity.txt file or dispalecement.txt file cause some resources recommend...
- Sat May 29, 2021 12:13 am
- Forum: OpenSees.exe Users
- Topic: groundmotion and uniformexitation.
- Replies: 8
- Views: 8998
Re: groundmotion and uniformexitation.
Hello, I am performing nonlinear time history analysis on the bridge with SSI(Structure-Soil Interaction).this work is conducting by Multiple-Support excitation{ground motion-impose}. how can I use of acceleration.txt file or velocity.txt file or dispalecement.txt file cause some resources recommend...
- Tue Oct 06, 2020 1:48 pm
- Forum: OpenSees.exe Users
- Topic: Hysteretic Material
- Replies: 12
- Views: 10260
Re: Hysteretic Material
Yes that should theoretically work, you need to check the resulting force displacement though Hello to you Unfortunately, I can not catch a good response because there are two gaps (negative and positive) in combination. Actually, how I model this material , besides I have to that combine two EPPGa...
- Mon Oct 05, 2020 12:04 am
- Forum: OpenSees.exe Users
- Topic: Hysteretic Material
- Replies: 12
- Views: 10260
Re: Hysteretic Material
Salutes all minds I want to know that how do model [gap] in Hysteretic material for fixed bearing and expansion bearing elements in the bridge (Neilson 2005). Can I model a gap in hysteretic material or should use other ways? *I have being trying that by combininga HystereticMaterial with an EPPGapM...