The OpenSees Community

fmk wrote: > keep it simple and use a truss or zerolength element to do your analysis > (axial load only). You may also need some initial stiffness iterations when > tangent goes to 0. Hi fmk: The reason why I use forcebeamcolumn or dispbeamcolumn is because I plan to use the same element, same mate...

fmk wrote: > there looks to be something wrong with the file source > LibGeneratePeaks.tcl. open it up and have a look. Hi Fmk: I also doubted that, but I cannot figure out where is the problem, could you please help me take a look on it. proc GeneratePeaks {Dmax {DincrStatic 0.001} {CycleType "...

.

Dear all: I'm trying to test the material stress-strain curve under cyclic compression-tension load. I just use Static Reversed Cyclic command file from OS official example page (http://opensees.berkeley.edu/wiki/index.php/OpenSees_Example_4._Portal_Frame) and make some adjustment based on my model....

Does anyone know how to solve this problem? Need help!

Dear all: I'm new to OS and try to build a simple model to test material stress-strain curve. I want to use forceBeamColumn element with fiber section to test the behavior of ConfinedConcrete01 material under cyclic compression (half cyclic). However, I always get error information as “ ForceBeamCol...

aodonne1 wrote: > I am running a reverse-cyclic pushover analysis of a wall panel model using the files > from Example 4 (specifically “LibGeneratePeaks”) on the OpenSEES website. I am able > to run a symmetrical reversed cyclic pushover (with “CycleType” set to “Full”) for > multiple peak displacem...

Hi, From the manual, it is said that "zeroLengthInterface2D is Node-to-Segment (NTS) frictional contact element used in two dimensional analysis for contact between elements. Please notice that any number of DOF (DOF>1) can be handled using this element (i.e. beam-solid, solid-solid as well as ...

Thanks very much

Dear all: I just encountered a problem about number format when I play with a one-bay one story frame. The script is as below: ############################################################################### wipe model BasicBuilder -ndm 2 -ndf 3 puts "model geometry" node 1 0 0 node 2 1 0 n...

Dear all: Hi, I want to test a simple truss frame but encountered a problem about boundary conditions and connection condition. My model is as simple as using two truss element to restrain a node in the system. The script is as below: #################################################################...

Dear all: I'm new to OpenSees and thinking about model a rocking rectangular block rocking on the two bottom corner support. Does anybody know how to change the boundary condition according to some real-time conditions (like node displacement is positive or negative) during the analysis. For example...

MohsenAmjadEQEng wrote: > Dear Frank, > > Eventually, I found the cause of the problem :D . As I discovered (!), the > "stop.exe" file, which is an executable file, must be put at the > sub-folder of "bin" i.e. "C:\tcleditor\bin" beside the > "OpenSees.exe" fi...

Thank you, vesna. I found Impact Material would be very helpful.

Hi,

Is anyone know if there are ways to model the compression only viscous damper in OpenSees? I try to model the rocking movement of a rigid block on the rigid foundation, and want to use a compression only damper to represent the energy dissipation mechanism once impacts happens.

Thanks

Song