ftool - puc-rio – version 3.00 copyright aug. 2012 – luiz fernando martha tutorial for analysis...
TRANSCRIPT
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Prof. Luiz Fernando Martha - PUC-Rio Rua Marquês de São Vicente, 225 - CEP 22453-900 - Rio de Janeiro, RJ Tel. +55 21 2512-5984 - Fax. +55 21 3527-1848 - E-mail: [email protected] - URL: http://www.tecgraf.puc-rio.br/~lfm
FTOOL Tutorial for the creation of a bridge model with two load-trains, and visualization of
critical load-train positions along influence lines and of internal force envelops
Educational Version 3.00
August 2012
http://www.tecgraf.puc-rio.br/ftool
This file: http://www.tecgraf.puc-rio.br/ftp_pub/lfm/ftool300tutorialloadtrain.pdf
FTOOL model:
http://www.tecgraf.puc-rio.br/ftp_pub/lfm/ftool300bridge.ftl
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Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 2
Users of this educational version are free to apply and re-distribute the program as they wish.
However, neither the author nor the PUC-Rio University or any other related institution is
responsible for the incorrect use of the program and its results. The author and PUC-Rio have no
legal responsibility for any damage caused directly or indirectly to a person or a company, resulting
from the application of any information or the utilization of the program. Users are responsible for
all conclusions made through the program. There is no commitment of satisfactory performance or
any kind of warranty.
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Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 3
Table of Contents
Create a file for the bridge model (command "Save as... ") ...................................................................................... 4
Specification of units and number formatting ........................................................................................................... 4
Insertion of bridge beam in keyboard mode .............................................................................................................. 5
Cancel member insertion to fit model image on screen ............................................................................................ 5
Fit image of model on screen .................................................................................................................................... 6
Insertion of first bridge column in keyboard mode ................................................................................................... 6
Insertion of second bridge column in keyboard mode .............................................................................................. 7
Insertion of third bridge column in keyboard mode .................................................................................................. 7
Insertion of fourth bridge column in keyboard mode ................................................................................................ 8
Cancel insertion of members ..................................................................................................................................... 8
Leave keyboard mode and select area for zooming in .............................................................................................. 9
Mouse clicks for insertion of dimension line at bridge central span ......................................................................... 9
Dimension line at bridge central span ..................................................................................................................... 10
Insertion of other dimension lines ........................................................................................................................... 10
Turn off display of dimension lines to simplify image ........................................................................................... 11
Creation of new material ......................................................................................................................................... 11
Selection of material type and name; and assignment to all members .................................................................... 12
Creation of cross-section for bridge columns .......................................................................................................... 12
Select rectangular cross-section for the bridge columns ......................................................................................... 13
Specify rectangular cross-section parameters and apply to bridge columns ........................................................... 13
Creation of cross-section for bridge beam members ............................................................................................... 14
Select type and name of cross-section for bridge beam members ........................................................................... 14
Specify cross-section parameters and apply to bridge beam members ................................................................... 15
Definition of fixed support and assignment to inferior nodes ................................................................................. 15
Definition of simple support and assignment to beam end nodes ........................................................................... 16
Creation of uniformly distributed load (dead load) for bridge beam ....................................................................... 16
Definition of dead load value and assignment to beam members ........................................................................... 17
Select small display size for supports ...................................................................................................................... 17
Select small display size for loads ........................................................................................................................... 18
Specification of two vehicle live loads (load-trains) ............................................................................................... 18
Creation of highway load-train with four axes ........................................................................................................ 19
Specification of highway load-train length, values of concentrated forces, and values of interior and
exterior live loads (population of small vehicles) ................................................................................................... 19
Creation of railroad load-train ................................................................................................................................. 20
Specification of railroad load-train length, values of concentrated forces, and values of full and
empty car distributed loads ..................................................................................................................................... 20
Select result visualization step (2 m) and set transversal display of result values ................................................... 21
Select cross-section for visualization of shear force influence line result ............................................................... 21
Visualization of shear force influence line result and critical positions (that cause minimum and
maximum) of highway load-train ............................................................................................................................ 22
Visualization of bending moment influence line result and critical positions (that cause minimum and
maximum) of highway load-train ............................................................................................................................ 22
Visualization of axial force influence line result and critical positions (that cause minimum and
maximum) of railroad load-train ............................................................................................................................. 23
Visualization of shear force envelops for highway load-train (including effect of permanent load) ...................... 23
Visualization of bending moment envelops for railroad load-train (including effect of permanent load) .............. 24
Visualization of bending moment envelops for railroad load-train (excluding effect of permanent load) .............. 24
Consulting step results values along central beam member of bending moment envelops for
railroad load-train (excluding effect of permanent load) ......................................................................................... 25
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Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 4
Create a file for the bridge model (command "Save as... ")
Specification of units and number formatting
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Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 5
Insertion of bridge beam in keyboard mode
Cancel member insertion to fit model image on screen
![Page 6: FTOOL - PUC-Rio – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 3](https://reader031.vdocuments.mx/reader031/viewer/2022022010/5afbafe37f8b9a19548fa481/html5/thumbnails/6.jpg)
Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 6
Fit image of model on screen
Insertion of first bridge column in keyboard mode
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Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 7
Insertion of second bridge column in keyboard mode
Insertion of third bridge column in keyboard mode
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Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 8
Insertion of fourth bridge column in keyboard mode
Cancel insertion of members
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Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 9
Leave keyboard mode and select area for zooming in
Mouse clicks for insertion of dimension line at bridge central span
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Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 10
Dimension line at bridge central span
Insertion of other dimension lines
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Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 11
Turn off display of dimension lines to simplify image
Creation of new material
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Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 12
Selection of material type and name; and assignment to all members
Creation of cross-section for bridge columns
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Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 13
Select rectangular cross-section for the bridge columns
Specify rectangular cross-section parameters and apply to bridge columns
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Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 14
Creation of cross-section for bridge beam members
Select type and name of cross-section for bridge beam members
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Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 15
Specify cross-section parameters and apply to bridge beam members
Definition of fixed support and assignment to inferior nodes
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Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 16
Definition of simple support and assignment to beam end nodes
Creation of uniformly distributed load (dead load) for bridge beam
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Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 17
Definition of dead load value and assignment to beam members
Select small display size for supports
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Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 18
Select small display size for loads
Specification of two vehicle live loads (load-trains)
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Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 19
Creation of highway load-train with four axes
Specification of highway load-train length, values of concentrated forces, and
values of interior and exterior live loads (population of small vehicles)
![Page 20: FTOOL - PUC-Rio – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 3](https://reader031.vdocuments.mx/reader031/viewer/2022022010/5afbafe37f8b9a19548fa481/html5/thumbnails/20.jpg)
Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 20
Creation of railroad load-train
Specification of railroad load-train length, values of concentrated forces, and
values of full and empty car distributed loads
![Page 21: FTOOL - PUC-Rio – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 3](https://reader031.vdocuments.mx/reader031/viewer/2022022010/5afbafe37f8b9a19548fa481/html5/thumbnails/21.jpg)
Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 21
Select result visualization step (2 m) and set transversal display of result values
Select cross-section for visualization of shear force influence line result
![Page 22: FTOOL - PUC-Rio – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 3](https://reader031.vdocuments.mx/reader031/viewer/2022022010/5afbafe37f8b9a19548fa481/html5/thumbnails/22.jpg)
Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 22
Visualization of shear force influence line result and critical positions (that cause
minimum and maximum) of highway load-train
Visualization of bending moment influence line result and critical positions (that
cause minimum and maximum) of highway load-train
![Page 23: FTOOL - PUC-Rio – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 3](https://reader031.vdocuments.mx/reader031/viewer/2022022010/5afbafe37f8b9a19548fa481/html5/thumbnails/23.jpg)
Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 23
Visualization of axial force influence line result and critical positions (that cause
minimum and maximum) of railroad load-train
Visualization of shear force envelops for highway load-train (including effect of
permanent load)
![Page 24: FTOOL - PUC-Rio – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 3](https://reader031.vdocuments.mx/reader031/viewer/2022022010/5afbafe37f8b9a19548fa481/html5/thumbnails/24.jpg)
Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 24
Visualization of bending moment envelops for railroad load-train (including
effect of permanent load)
Visualization of bending moment envelops for railroad load-train (excluding
effect of permanent load)
![Page 25: FTOOL - PUC-Rio – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 3](https://reader031.vdocuments.mx/reader031/viewer/2022022010/5afbafe37f8b9a19548fa481/html5/thumbnails/25.jpg)
Ftool – Version 3.00 Copyright Aug. 2012 – Luiz Fernando Martha
Tutorial for analysis of influence lines and internal force envelops due to vehicle live loads 25
Consulting step results values along central beam member of bending moment
envelops for railroad load-train (excluding effect of permanent load)