Search found 5866 matches

by fmk
Sat Apr 14, 2018 7:20 pm
Forum: OpenSees.exe Users
Topic: Excavation Example in OpenSees Website
Replies: 2
Views: 379

Re: Excavation Example in OpenSees Website

possibly because when they put the example together they did not have the ability to put stresses from all gauss points into one output file .. or maybe they wanted to keep them seperate .. does it really matter??
by fmk
Sat Apr 14, 2018 7:18 pm
Forum: OpenSees.exe Users
Topic: Push and Pull
Replies: 9
Views: 1227

Re: Push and Pull

0 tensenion means the tangent is 0 when material goes into tension, hence the matrix (a 1x1) has a 0 on the diagnonal and hence it is not going to work!
by fmk
Tue Apr 10, 2018 8:22 pm
Forum: OpenSees.exe Users
Topic: Analysis Commands in Wall-Backfill Problems
Replies: 2
Views: 307

Re: Analysis Commands in Wall-Backfill Problems

you might need to brush up on dynamic analysis integration schemes (Newmark, Central Difference, ...), nonlinear solution algorithms (Newton Raphson, Modified Newton,...) before you start using OpenSees as you can get wrong answers if you do not know what you are doing. i suggest "Dynamics of Struct...
by fmk
Tue Apr 10, 2018 8:18 pm
Forum: OpenSees.exe Users
Topic: 2-Stage Pushover Analysis
Replies: 2
Views: 443

Re: 2-Stage Pushover Analysis

there should be no drop if you use loadConst .. do not add new load pattern do a step or 2 of analysis and results should not change .. if problems with second loading .. if you do not use 'locConst -time 0.0" the time series for second load step will return the factor at t_lastStepOfOldAnalysis + dT
by fmk
Tue Apr 10, 2018 8:14 pm
Forum: OpenSees.exe Users
Topic: How to download most recent source code of OpenSees?
Replies: 2
Views: 745

Re: How to download most recent source code of OpenSees?

you want to download a specific release tag using subversion .. release tags given in
http://opensees.berkeley.edu/OpenSees/changeLog.php

see page 4 or 17 for how to download specific release
https://greenbay.usc.edu/csci577/tools/ ... Manual.pdf
by fmk
Tue Apr 10, 2018 8:10 pm
Forum: OpenSees.exe Users
Topic: Salome for Opensees
Replies: 1
Views: 297

Re: Salome for Opensees

no
by fmk
Tue Apr 10, 2018 8:10 pm
Forum: OpenSees.exe Users
Topic: Unable to start correctly (0xc000007b)- Windows 7 - 64 bit
Replies: 2
Views: 442

Re: Unable to start correctly (0xc000007b)- Windows 7 - 64 b

have you installed the correct versions of tcl and opensees .. either both 32 or both 64
by fmk
Tue Apr 10, 2018 8:09 pm
Forum: OpenSees.exe Users
Topic: Push and Pull
Replies: 9
Views: 1227

Re: Push and Pull

by fmk
Wed Mar 28, 2018 9:11 pm
Forum: OpenSees.exe Users
Topic: Earthquake analysis
Replies: 4
Views: 1005

Re: Earthquake analysis

set rho 1.7

mass in continuum problems typically comes from the element as computing mass terms for the nodes would be a nightmare for all but regular meshes.
by fmk
Wed Mar 28, 2018 9:05 pm
Forum: OpenSees.exe Users
Topic: Eigen analysis of a 3D RC frame?
Replies: 3
Views: 974

Re: Eigen analysis of a 3D RC frame?

it is exactly same as 2d!
by fmk
Wed Mar 28, 2018 8:55 pm
Forum: OpenSees.exe Users
Topic: Geometric Transformation in Diagonal Members
Replies: 3
Views: 550

Re: Geometric Transformation in Diagonal Members

if you mean how to orient .. just treat it like a beam, the xz vector does not have to be perpendicular to the axis, it is just defining a plane.
by fmk
Mon Mar 19, 2018 10:08 am
Forum: OpenSees.exe Users
Topic: initial imperfection in 3D trusses
Replies: 3
Views: 422

Re: initial imperfection in 3D trusses

google opensees and the words initial strain or initial stress .. the last option you should be able to figure out yourself if using opensees.
by fmk
Mon Mar 19, 2018 10:06 am
Forum: Parallel Processing
Topic: Solution to Mumps Error
Replies: 2
Views: 1608

Re: Solution to Mumps Error

do the static analysis with a transient analysis .. sorry but there is some bug in Mumps related to memory when we destroy one instance and start the next.
by fmk
Mon Mar 19, 2018 10:05 am
Forum: Parallel Processing
Topic: Error running OpenseesSP using ibrun
Replies: 1
Views: 725

Re: Error running OpenseesSP using ibrun

use system Mumps
by fmk
Mon Mar 19, 2018 10:04 am
Forum: Framework
Topic: Compiling pythonmodule
Replies: 3
Views: 987

Re: Compiling pythonmodule

i have updated various Makefile .. the Makefille.def.EC2-UBUNTU contains steps on how to build the python module and OpenSees on a freash ubuntu machine