Search found 26 matches

by caosasa
Wed Oct 24, 2012 6:53 pm
Forum: OpenSees.exe Users
Topic: zero-length component in Beamwithhinges element
Replies: 2
Views: 848

zero-length component in Beamwithhinges element

Dear Vesna and other openseesers: i have 2 questions about the BWH element, 1. if the length of the elastic part or a hinge part at one end of the BWH element is set to be 0, will the BWH element work still well? 2. in the model of a long pier in bridge, if several BWH elements is defined, ie, the l...
by caosasa
Sat Oct 20, 2012 6:43 pm
Forum: OpenSees.exe Users
Topic: curvature of forceBeamColumn & dispBeamColumn in pushover
Replies: 12
Views: 3529

Re: curvature of forceBeamColumn & dispBeamColumn in pushove

wuhaoshrek wrote: > vesna wrote: > > The displacement-based approach follows standard finite element > > procedure where we interpolate section deformations from an > > approximate displacement field and then use the PVD to form the element > > equilibrium relationship. To approximate nonlinear elem...
by caosasa
Tue Oct 16, 2012 7:22 pm
Forum: OpenSees.exe Users
Topic: About the plastic rotation of the dispBeamColumn
Replies: 13
Views: 4806

Re: About the plastic rotation of the dispBeamColumn

Dear vesna, thank you for your reply. I saw other users are also confused about how to compute the plastic rotation. Would you please consider the question 2: how can i use curvature and plastic hinge length to calculate plastic rotation? would you show me an example please? i have record the curvat...
by caosasa
Tue Oct 16, 2012 7:14 pm
Forum: OpenSees.exe Users
Topic: curvature of forceBeamColumn & dispBeamColumn in pushover
Replies: 12
Views: 3529

Re: curvature of forceBeamColumn & dispBeamColumn in pushove

Dear vesna, thank you for your patience reply. Can i replicate "To approximate nonlinear element response, constant axial deformation and linear curvature distribution are enforced along the element length (exact only for prismatic linear elastic elements)" as the displacement-based approach is exac...
by caosasa
Tue Sep 25, 2012 3:38 am
Forum: OpenSees.exe Users
Topic: curvature of forceBeamColumn & dispBeamColumn in pushover
Replies: 12
Views: 3529

Re: curvature of forceBeamColumn & dispBeamColumn in pushove

one more question: in the dispelement, can the plastic rotation be computed as the
curvature at the i node multiplying the length of the element at the foot of piles or pier?
by caosasa
Mon Sep 24, 2012 10:26 pm
Forum: OpenSees.exe Users
Topic: curvature of forceBeamColumn & dispBeamColumn in pushover
Replies: 12
Views: 3529

curvature of forceBeamColumn & dispBeamColumn in pushover

Dear all, i find that in the pushover analysis of a pier, if all elements of the pier is simulated with dispbeamcolumn and fiber section, the curvature in all the integration points of an disp element is almost identical, and the cuvature at node j of element 1 is different from the cuvature at node...
by caosasa
Sat Sep 22, 2012 11:53 pm
Forum: OpenSees.exe Users
Topic: questions about dynamic of SDOF
Replies: 3
Views: 1381

Re: questions about dynamic of SDOF

Dear vesna, can you tell me "In SDOF systems the damping is proportional to mass only "
is on which part of the book? it's hard to find.
Thank you very much!
by caosasa
Fri Sep 21, 2012 6:05 pm
Forum: OpenSees.exe Users
Topic: About the plastic rotation of the dispBeamColumn
Replies: 13
Views: 4806

Re: About the plastic rotation of the dispBeamColumn

vesna wrote: > To get plastic rotation of plastic hinges for element 1 here is the > command: > > recorder Element -file Element1.out -time -ele 1 plasticDeformation > > The file will contain 4 columns. The 1st is time, the 2nd is axial plastic > deformation, the 3rd is plastic rotation at node i, a...
by caosasa
Thu Sep 20, 2012 5:06 am
Forum: OpenSees.exe Users
Topic: About the plastic rotation of the dispBeamColumn
Replies: 13
Views: 4806

Re: About the plastic rotation of the dispBeamColumn

Dear vesna, would you please consider my question? Thank you very much.
by caosasa
Thu Sep 20, 2012 3:37 am
Forum: OpenSees.exe Users
Topic: About the plastic rotation of the dispBeamColumn
Replies: 13
Views: 4806

About the plastic rotation of the dispBeamColumn

Dear all, i am computing the plastic rotation of piers of bridge with OpenSees. The pier is about 20 meters in elevation. Fiber section and dispBeamColumn are used for all the elements. Each element is 2 meters in length. The number of the element is from bottom to top of the pier. The element at th...