Open File > New Model > Select Unit KN, m, C > Select
Grid Only :Grid Lines : X= 21, Y= 2, Z= 2Grid Spacing: X = Span/20,
Y= 10m, Z= 12mOK Close 3D, Select XZ View, select up or down key
above to move to XZ plane @ Y=0 Top Bar > Define> Section
Properties> Frame Sections> Add new property> Input of
assumed data Bottom Chord, Top Chord, Diagonal: (BOX Section)t3
=0.6 mt2= 0.45 mtf=0.025 mtw= 0.025 m Portal (DOUBLE Angle)t3=
0.15mt2= 0.30m (.15+.15)tf= 0.01 mtw= 0.01md= 0 Top Bracing, Bottom
Bracing (I Section)t3= 0.30 mt2= 0.25 mtf=0.01 mtw= 0.01 mt2b=0.25
mtw=0.01 m Cross Beam, Floor Beam (I Section)t3= 1.3 mt2= 0.32
mtf=0.02 mtw=0.01 mt2b=0.32 mtfb=0.02 m Stringe (I Section)t3=
.8mt2= 0.22 mtf=0.016 mtw=0.01 mt2b=0.22 mtfb=0.016 m
Draw Frame by selecting Section as required and Moment Release
Pinned Edit >Replicate> dx = Span/10 dy= 0 dz= 0 No=9
OK Select All Frames: 21 pts, 39 FramesEdit> Replicate>
dx=0, dy=10, dz=0, No=1
INCOMPLETE--------------------------------------------------------------------------------------------------------
Join the members of left most diagonals of the bridge. [XZ plane
@ Y=0 and then Y=10]Select member > Edit > Edit Lines >
Join Frames Define > Load Patterns >Write: Load Patter Name
Wind Load + Y Type WIND > Add New Load Pattern>Write: Load
Patter Name Wind Load - Y Type WIND > Add New Load Pattern>
OK
Select XZ Plane @ Y=0 > Select the 21 nodes joining T.Chord
,B. Chord and Diagonal Assign > Joint Loads > ForcesLoad
Pattern Name Wind Load + YForce Global Y = 105OK**3D View will show
load at nodes Select XZ Plane @ Y=10 > Select the 21 nodes
Assign> Joint Load>Forces Load Pattern Name Wind Load + Y
Force Global Y = -105OKDefine > Load Patterns >Write: Load
Patter Name Wind Load on Vehicle + Y Type WIND > Add New Load
Pattern>Write: Load Patter Name Wind Load on Vehicle - Y Type
WIND > Add New Load Pattern>OK
Select XZ Plane @ Y=0 > Select the internal 9 nodes with
Floor BeamsAssign > Joint Loads > Forces
For the two external nodes, Force will be half i.e F=6.64 KN
Select XZ Plane @ Y=10 > Select the internal 9 nodes> Repeat
with WL on Vehicle Y, F=-13.28KNAnd external 2 nodes F=-6.64KN
LANE
Select XY Plane, Z=0 > Tick off Fill Objects > Select
Stringer 2 and 4 (Use L to R selection) > View > Show
Selection Only Set Display Option > Tick mark on Labels Zoom in
> Note down the co-ordinate values on each node of stringer 4
and 2 Define > Bridge Load > Lanes > Add New Lane Defined
from Frames FILL Up Table as below:
Repeat same for Lane 2 but remember to Change Right Edge to
Exterior.OK > OK Display > Show Lane> Show Lane Width
VEHICLE Define > Bridge Load > Vehicle > Add
VehicleVehicle Type HSn-44, n=20Scale Factor 20>> Convert to
General Vehicle>> Modify or Show Vehicle > Change Vehicle
Name to: Wheel Load > Change Variable Length Maximum Distance to
14 > Tick on Vehicle Remains Fully in Lane > OK Add
VehicleVehicle Type: HSn-44L, n=20> Convert to General
Vehicle> Modify or Show Vehicle > Change Vehicle Name to:
Lane Load > Change Units to Kip,ft, F > Add Leading Load >
Modify Axle Load to 26> Tick on Vehicle Remains Fully in Lane
> OK > OK Define > Bridge Load> Vehicle Classes >Add
New Class > Vehicle Class Name Wheel Load > Vehicle Name
Wheel Load > Add > OKAdd New Class > Vehicle Class Name
Lane Load > Vehicle Name Lane Load > Add > OK Add New
Class > Vehicle Class Name Max Live Load > Vehicle Name Wheel
Load > Add > Vehicle Name Lane Load > Add > OK >
OK
Define > Load Cases > Add New Load Case> Load Case Name
Wheel Load > Load Case Type Moving Load > Vehicle Class Wheel
Load > Add > OKAdd New Load Case> Load Case Name Lane Load
> Load Case Type Moving Load > Vehicle Class Lane Load >
Add > OKAdd New Load Case> Load Case Name Max LL > Load
Case Type Moving Load > Vehicle Class > Max Load > Add
> Select both Lane 1, Lane 2 > OK Analyze> Run Now
Analysis Complete Display > Show Forces > Frames > Show
Value on Diagram
