Search found 7 matches

by harvie
Mon Mar 01, 2021 10:03 am
Forum: OpenSees.exe Users
Topic: Lumped Mass system
Replies: 2
Views: 624

Re: Lumped Mass system

mhscott wrote:
Mon Mar 01, 2021 5:39 am
Do not use the Linear algorithm if you have nonlinear response! Use Newton.
Thank you very much, Sir!
by harvie
Sun Feb 28, 2021 7:32 am
Forum: OpenSees.exe Users
Topic: MDOF lumped mass model
Replies: 4
Views: 760

Re: MDOF lumped mass model

mhscott wrote:
Sun Feb 28, 2021 6:14 am
No
Thank you very much, Sir!

Though I have not yet figured out how I can correctly model a structure using a spring-mass system.
I actually posted another topic here: viewtopic.php?f=2&t=68378
Maybe you can give me insights about it, Thank you in advance!
by harvie
Sun Feb 28, 2021 7:27 am
Forum: OpenSees.exe Users
Topic: Lumped Mass system
Replies: 2
Views: 624

Lumped Mass system

Good day! I've been trying to model a simple structural system for time history analysis wherein mass are lumped and columns are represented by spring elements. I tried using two-node link elements for the column and defined a hysteretic material to represent the overall structure properties. I was ...
by harvie
Sat Feb 27, 2021 8:47 am
Forum: OpenSees.exe Users
Topic: MDOF lumped mass model
Replies: 4
Views: 760

Re: MDOF lumped mass model

mhscott wrote:
Sat Feb 27, 2021 6:08 am
Eigenvalue analysis is not required to do response history analysis.
Thank you for replying, Sir!

How about gravity analysis, is it mandatory before perfoming THA?
by harvie
Fri Feb 26, 2021 6:45 am
Forum: OpenSees.exe Users
Topic: MDOF lumped mass model
Replies: 4
Views: 760

MDOF lumped mass model

Hello everyone!

Any idea on how I model a lumped mass MDOF system with columns represented as shear and flexure springs?

Also, is it required to do first eigenvalue analysis and gravity analysis to capture the response to a time-history analysis?
by harvie
Sun Nov 29, 2020 7:13 am
Forum: OpenSees.exe Users
Topic: Help with MDOF shear and MDOF flexural-shear modeling
Replies: 2
Views: 526

Re: Help with MDOF shear and MDOF flexural-shear modeling

hello @selimgunay!

Thank you for replying, I'm actually thinking of using 2-node links, is this possible?
Or should I use zerolength elements and connect them with rigid links?
by harvie
Thu Nov 26, 2020 5:49 am
Forum: OpenSees.exe Users
Topic: Help with MDOF shear and MDOF flexural-shear modeling
Replies: 2
Views: 526

Help with MDOF shear and MDOF flexural-shear modeling

Good day everyone! Harvie here, I'm literally new to opensees and is trying to understand how this works. I'm trying to read stuff from the wiki but I can't seem to find what I'm looking for. I'm trying to model low to mid rise structures as MDOF concentrated mass shear models and high rise structur...