| Info |
|---|
This page is devoted to frequently asked questions (FAQ) related to constraints. |
On this page:
| Table of Contents |
|---|
What is the difference between a line constraint and an edge constraint?
Answer: Line and edge constraint both refer to the same modeling feature except that line constraint is terminology specific to ETABS, while edge constraint is used in SAP2000.
| Show if | ||
|---|---|---|
| ||
Review to check if this Q/A be removed. It is possible that edge constraint is now used in ETABS as well as SAP2000. |
What are the advantages and disadvantages between using rigid links and body constraints?
Extended Question: I am using the Bridge Modeler to model an offset rocker bearing. A combination of link objects seems to simulate the connection between girder and pier systems. Is there an explanation for the difference between links and body constraints?
...
- Using body constraints reduces the number of degrees of freedom (DOF) in the model, which speeds numerical solution.
| Show if | ||
|---|---|---|
| ||
Related Incidents:
|
Why are numerical problems reported for diaphragm constraints?
...
Answer: Please see the Line (edge) constraint article for response.
| Show if | ||
|---|---|---|
| ||
Question 1: When would a body constraint be applied with only some DOF constrained? Answer 1: OPEN QUESTION Question 2: What behaviors occur when only some DOF are constrained? Answer 2: OPEN QUESTION Question 3: Is there an example of how constraint coupling may cause numerical instability? Answer 3: OPEN QUESTION |