How to model prestressed concrete deck?

[Jihoon]

Thanks for click me~~!!!

I'm modeling straight and curved bridge now.
I have problem about applying prestressed in concrete deck.
The bridge deck is modeled using elastic beam elements.

Here is the Elastic properties of the bridge deck
----------------------------------------------------------------------------
Area 5.72 m2 (8,869 in2)
Compressive strength 34.47 MPa (5 ksi)
Elasticity modulus 27,596 MPa (4,002 ksi)
Shear modulus 11,498 MPa (1,668 ksi)
Moment of inertia about z-axis 2.81 m4 (325.5 ft4)
Moment of inertia about y-axis 53.87 m4 (6,242 ft4)
Torsional moment of inertia 6.03 m4 (699 ft4)
Prestressing force 31,136 kN (7,006 kips)
----------------------------------------------------------------------------

so I modeled in OpenSees Like this

set IDColTransf 4; # all columns(parallel to Y axis)
set IDBeamTransf 5; # all beams(parallel to X axis)
set IDGirdTransf 6; # all girders(parallel to Z axis)
set ColTransfType PDelta ; # options, Linear PDelta Corotational
geomTransf $ColTransfType $IDColTransf 0 0 1 ; # only columns can have PDelta effects (gravity effects)
geomTransf Linear $IDBeamTransf 0 0 1;
geomTransf Linear $IDGirdTransf 1 0 0;

# #################################################
# Define Pier/Deck Elements
# #################################################
# Deck------------------------------------------------------------------
# beams
set E [expr 27596*$MPa];
set A [expr 5.72*$m2];
set G [expr 11498.*$MPa]; # Shear Modulus(set large)
set J [expr 6.03*$m4]; # torsional moment of inertia of cross section(set large)
set Iy [expr 53.87*$m4];
set Iz [expr 2.81*$m4];
set SecTagDeck 4;
for {set i 1} {$i <= 40} {incr i} {
element elasticBeamColumn [expr $i+1000] [expr $i] [expr $i+1] $A $E $G $J $Iy $Iz $IDBeamTransf;
}


How can I apply prestress in straight and curved concrete deck??

[dakekiouy]

oh.yep..I don't know.sorry