CalculiX comparabilities with SAP2000 and Analytical Calculations in Analyzing Reinforced Concrete 3D Frame Structure
Post on 03-Jul-2015
909 Views
Preview:
Transcript
CalculiX comparabilities with SAP2000 and Analytical Calculations in Analyzing
Reinforced Concrete 3D Frame Structure
Project MembersSameer Alam (10-PWCIV-3457)
M. Bilal Qazi (10-PWCIV-3444)
Shad Muhammad (10-PWCIV-3449)
SupervisorAsst. Prof. Faisal-ur-Rehman
2
Content● Introduction
● Problem Statement
● Objectives
● Literature Review
● Methodology
● Expected Outcome
● Work Overview
● Project Time-line
● References
3
Introduction
● Finite Element Analysis (FEA) is a numerical technique for
understanding behavior of structures.
● Commercial software are black boxes and proprietary i.e one cannot
see/modify the source code. It is difficult to acquire the output tailored
for research.
● Reliability of analysis softwares is required to be studied.
● To explore CalculiX - A free Finite Element Software, for the analysis
of Reinforced Concrete(RC) Frame Structures.
● To use a genuine and ethically legal software for analysis.
4
Problem Statement● SAP2000, SAFE and ETABS are commercial and proprietary
softwares are less suitable for engineering research.
● A FEA software for CED is required that can be modified and
developed as per our own requirement.
● Remember, all softwares provide disclaimer and provide no
guarantee on accuracy and reliability of results.
● Hence we require, 'a comparative analysis of CalculiX, analytical
and commercial FEA software by using example of RC frame
structure to explore the capability of CalculiX'.
5
Objectives
● Getting complete grasp over application of FEA to frame structures.
● Bringing forward & learning a new software “CalculiX”: which may
be more reliable and productive in structural analysis results.
● To create tables and graphs of comparative results.
● To test the effectiveness of using CalculiX.
● To lay out background for adopting CalculiX as a home grown
software for the Department of Civil Engineering, UETP.
6
Mission Statement
To Develop a Free Structural Engineering software for the Department of Civil Engineering, UETP, which can be designed, modified and used
as per our own requirement.
7
Scope
● Our major work will be carried out in CalculiX, while SAP2000
and manual calculation will be used for cross-check.
● To master SAP2000 and incorporating MATLAB as a tool for
data processing, to help us increase the results efficiency and
productivity.
● A case study will be conducted on a Warehouse of KPK FATA
Secretariat.
● We will only perform computational & manual analysis.
8
Limitations
● Only frame structure will be worked out.
● No experimental testing will be conducting.
● Only one case study will be carried out.
● No design calculations and design reports.
● Only gravity and earthquake loads will be taken.
● Linear analysis
9
Why Structure Analysis Softwares?
● More Efficient
● Entity Behavior Modeling
● Greater Flexibility
● Fewer Flaws
● Time saving
– For professional engineers, contractors and architects, structural analysis software is a time saver
● Peace of Mind
– A building project is stressful enough without worrying about integrated building codes, proper construction techniques, and architectural calculations
10
CalculiX● A Free Software, Three-Dimensional Structural Finite Element
Program, designed to solve field problems.
● It can be used, shared, decoded and rebuilt “FREELY”.
● It’s a Multi-Physics software covering many scientific disciplines and
providing many analysis options.
e.g.
– Seepage under Dams
– Maximum stress in a para-glide
– Pipe Flow analysis, Channel Flow Modeling, Time History Analysis, etc.
11
Literature Review
● Literature about Basics of CalculiX
● Analysis of Frames in SAP2000
● Analytical Analysis of Frame Structures
(Stiffness Method, Moment Coefficient Method, etc)
● Reference manuals and documentations of CalculiX
and SAP2000
12
Methodology
● We will start our work with basic structural models and leading
towards 3D frame structures.
● We will use analytical methods to manually analyze the 3D 2-Storey,
3 Bay frame model
(Stiffness Method, Moment Coefficient Method, etc)
● Analyze frames in SAP2000
● Analyze same frame in CalculiX
● Finally, comparing the results of both softwares and manual
calculations by using a case study.
13
Expected Outcome
● We will get the comparative results in graphical & tabular
form for frame structure analysis in CalculiX & SAP2000.
● Percentage difference based on the result will be taken.
● Conclusions and recommendations will be provided.
● A comprehensive documentation for analysis procedure
of 3D frame structure using CalculiX will be prepared.
14
Work ProgressBasic Model of Beam in CalculiX
Fig. 1 Steps involved in Modeling and Analysis of a Cantilever Beam in CalculiX
15
Work ProgressBasic Model of Cantilever Beam in CalculiX
1kips
10'
Location Loads (kips)
10' Distance 1
Fig. 2 Cantilever Beam in CaluliX
16
Basic Model of Continuous 3-Bay Beam in CalculiX
Location Loads (kips)
Bay 1, Midspan 1
Bay 2, Midspan 1
Bay 3, Midspan 1
Fig. 3 Continuous 3-Bay Beam in CalculiX
1kips 1kips 1kips
30'
17
Basic Model of Truss in CalculiX1kips
5'
5'
Location Loads (kips)
At Joint #2 1
Fig. 4 Truss example in CalculiX
18
Basic Model of Cantilever Beam in SAP2000
Fig. 5 Shear Force & Bending Moment Diagrams of Cantilever Beam in SAP2000
19
Basic Model of Continuous 3-Bay Beam in SAP2000
Fig. 6 Shear Force & Bending Moment Diagrams of Continous 3-Bay Beam in SAP2000
20
Basic Model of Truss in SAP2000
Fig. 7 Axial Force Diagram of 2D Truss in SAP2000
21
Basic Model of 2D-RC Frame Structure in SAP2000
Fig. 8 Shear Force & Bending Moment Diagrams of 2D RC Frame Structure in SAP2000
22
Manual Calculations Result2D-RC Frame Structure using Stiffness Method
Fig. 9 2D-RC Frame Structure using Stiffness Method
23
Manual Calculations Result2D-RC Frame Structure using Moment Coefficient Method
Fig. 10 2D-RC Frame Structure using Moment Coefficient Method
24
Finalized 3D-RC Frame Structure will Look Like following...
25
Project Overview
● We performed the analysis of basic structures and structural
elements i.e Beams, truss and frames in SAP2000 & manually.
● Having a difference in results up to 7 to 8%.
● Solved 3 examples (2 Beams, 1 Truss element) in CalculiX &
SAP2000.
● We have made a GUI based on parametric solution for
automatic calculation for CalculiX having a simple GUI
(Graphical User Interface).
26
Next Tasks● MATLAB interface
● Slab analysis
● 3D Frame analysis
● Lateral earthquake loading
● Interface for parametric inputs
● Custom output formats
● Importing/exporting models to SAP2000
● Creating analysis report
● Documentation of all the processes
27
Project Time-line: Gantt Chart
28
Weekly Meeting ScheduleDate Day Task Name Student Status
13/09/13 Friday Literature review on CalculiXM. Bilal Qazi
Sameer Alam Shad Muhammad
Completed
20/09/13 Friday 2D RC-Frame Structure analysis in SAP2000 Sameer Alam Completed
26/09/13 Thursday Manual Calculations & analysis of 2D RC-Frame structure M. BilalShad Muhammad
Completed
05/10/13 Saturday 1st Presentation Preparation Shad Muhammad Completed
04/10/13 Friday Presentation Review & Delivery PracticeM. Bilal
Sameer Alam Shad Muhammad
Completed
31/10/13 ThursdaySimple Beam analysis in CalculiX
M. Bilal QaziSameer Alam
Shad Muhammad
Completed
05/11/13 TuesdayTruss, cantilever beam & 3 Bay beam example in Calculix
M. Bilal QaziSameer Alam
Shad Muhammad
Completed
27/11/13 Wednesday Recheck of manual calculation using MATLAB M. Bilal Qazi Shad Muhammad
Completed
15/01/14 Wednesday Working on Project Copy Sameer AlamShad Muhammad
In progress
21/02/14 Friday Automating Calculations in Octave Shad Muhammad In Progress
04/03/14 Tuesday 2nd Presentation Preparation M. Bilal Qazi Sameer Alam
Completed
05/03/14 Wednesday Presentation review Shad Muhammad Completed
10/03/14 Monday Making and interface based on Parametric Procedures Shad Muhammad In progress
29
References
● CalculiX USER'S MANUAL
(www.bconverged.com/calculix/doc/cgx/html/index.html)
● Getting Started with CalculiX (www.bconverged.com/content/calculix/doc/GettingStarted.pdf)
● SAP2000 Tutorial Manual - Extra Materials
● Tutorial to SAP2000 Student Edition
● Stiffness Method details
30
THANK YOU
Special Thanks to
Sir Faisal-ur-Rehman for his hard work &
cooperation
top related