3D Building model of 40 Story Building
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Material for frames = A992 (50ksi)
Beams (24” permitted by architect)
Columns (30” permitted by architect)
Use 6” thick concrete slab
Secondary beams maximum spacing to be 1m
Floor heights are 3m, except ground floor which is 4m
Braced frames (Cross braced‐Per 4 storeys)
6@7m (typ.)
5m
2@8m (typ.)
5m
5m
5m
WALL MESHING
• SAP2000 works on Finite element method of structural analysis in
which the loads, moments, translations and rotations transmit from
one point to other point referred as notes.
• The nodes at line elements (beam and columns) are at joints, but in
area elements the nodes are at meshing
• The finer meshed area in shell, more accurate will be analysis
Meshing Rules
• Wall meshing is always done in shell type elements not membrane as
previously explained
• The meshing lines must be continuous as per illustration
Meshing in SAP2000
• Two types of meshing in SAP2000
• Manual meshing
• Automeshing
SLAB MESHING
• SAP2000 works on Finite element method of structural analysis in
which the loads, moments, translations and rotations transmit from
one point to other point referred as notes.
• The nodes at line elements (beam and columns) are at joints, but in
area elements the nodes are at meshing
• The finer meshed area in shell, more accurate will be analysis
Meshing Rules
• Slab meshing is always done in shell type elements not membrane as
previously explained
• The meshing lines must be continuous as per illustration
Meshing in SAP2000
• Two types of meshing in SAP2000
• Manual meshing
• Automeshing
Selection Groups
• Selection groups in SAP2000 refer to defining a group of elements
(Beams, Columns, Slabs, Walls) to be all selected together when defined
in form of a group
• It helps in quick iterations to incorporated design changes and revisions
for cross sections of the selected structural members
• Using this option there would be no need for selecting particular set of
members again and again in order to alter/change/revise/modify/delete
properties for that particular set of members
• Let’s have a look on how to do it.
Merge Models
• The merge model tools is very helpful in modelling complex models
which helps to combine models in SAP2000
• But before merging the models, the merge model checks must be
performed
• Let’s have a look at the rules/checks before merging two models
Rules for merging models
• The model to be copied is called “sub model”, there may be multiple
sub models.
• The model where sub models are pasted i.e the model which will be
combined/merged model is called “main model”
• The materials, cross‐sections of slabs, walls, beams and columns and
other important properties of model of the sub model must be
defined in the main model with same “Names”
• The storey heights of main model must be same as sub model
• The sub model must be copied from 3D view into the 3D view of the
main model
• The origin of “sub model” can be pasted with displacement in x, y or
z‐axis
Exercise
• The main model is given as
Exercise
• The Sub model 01 is given as:
Exercise
• The Sub model 02 is given as:
Exercise
• The Merged model should be
Sub
model 02
Sub
model 01
Main
model