manual programa XTRACT 2012

1. XTRACT
Cross Sectional Analysis of Structural Components
Tutorial
CIE 525 – Concrete Structures
September 11, 2012

2. About the XTRACT Software
• Created by Dr. Charles Chadwell at UC
Berkeley
• Original name: UCFyber
• Acquired by Imbsen Software Systems in 2001
• Renamed to: XTRACT
• XTRACT is a general cross-sectional analysis
software for analysis of any section shape and
material subjected to any force-based loading

3. Moment-Curvature Analysis of a Beam Section
Using XTRACT
15“
22“
1.5“ concrete cover
#5 ties spaced @ 4”
on center
#9 main reinforcing bars
n4

4. 1. Create New Project
2. Cross Section and Beam Core Details

5. 3. Geometry
4. Materials

6. Typical values for the crushing and spalling
strain for unconfined concrete are 0.003 and
0.006, respectively (ACI 318-11 R10.2.3).
Failure Strain
If analyzing a section where cover spalling is
not to control the termination of the analysis,
enter a large number in this text field (e.g. 1.0 -
strain of 100%). If analyzing a cross section where
computation should terminate when the cover
spalls, enter the crushing or spalling strain in this
text field.
Unconfined Concrete Model for Concrete Cover

7. Mander Confined Concrete Model for Beam Core
Note: Typically, to go beyond a 0.02 strain
for confined concrete, the details and
construction quality need to be carefully
controlled.

8. Longitudinal Steel
(Parabolic Strain Hardening Steel Model)

9. 5. Create Section
Unconfined Concrete Cover
Model
Confined Core Model
Shape Boundaries

10. 6. Copying and Modifying the Section

11. 7. Loading and Analysis
XTRACT analysis types:
-Moment Curvature, Axial
-Force-Moment Interaction
-Capacity Orbit (moment-moment interaction)
Moment Curvature Analysis

12. 7. Analysis (Rebar Strain Hardening Model)

14. 7. Analysis (Elasto-Plastic Rebar Model)
Add:
a.) MATERIALS  Bilinear Steel Model
b.) New Section from Template