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用Opensees进行IDA分析(桥墩模型命令流).docx

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用Opensees进行IDA分析(桥墩模型命令流)

wipe# Opensees dandun# #Units:kN, m, sec# -----------------# Start of model generation# -----------------# Create ModeBulider (with two-dimensions and 3 DOF/node)model basic -ndm 2 -ndf 3 # -----------------#tag X Y node 1 0.0 0.0node 2 0.0 0.0node 3 0.0 2.0 node 4 0.0 4.0node 5 0.0 6.0 node 6 0.0 8.0node 7 0.0 10.0node 8 0.0 12.0node 9 0.0 14.0node 10 0.0 16.0node 11 0.0 18.0 node 12 0.0 20.0 # -----------------# Fix supports at base of columns# tag DX DY RZfix 1 1 1 1 # ----------------# Concretetag fc ec0fcu ecu # Core concrete (confined)uniaxialMaterial Concrete01 1 -25600.0 -0.00219 -17780.0 -0.01 #Cover concrete (unconfined)uniaxialMaterial Concrete01 2 -23400.0 -0.002 -0.0 -0.006 # STEEL # Reinforcing steel set fy 400000.0; #Yield stressset E 200000000.0;# Youngs modulus# tag fy E0 b uniaxialMaterial Steel02 3 $fy $E 0.01 18.5 0.925 0.15 uniaxialMaterial Elastic 11niaxialMaterial Elastic 12niaxialMaterial Elastic 13 587247596#Define cross-section for nonlinear columns # ---------------------# set some parameters set colWidth 8.18 set colDepth 4.28 set cover 0.05 set As 0.00049 # some variables derived from the parametersset y1 [expr $colDepth/2.0] set z1 [expr $colWidth/2.0] section Fiber 1 { # Create the concrete core fibers patch rect 1 20 30 [expr $cover-$y1] [expr $cover-$z1] [expr $y1-$cover] [expr $z1-$cover] # Create the concrete cover fibers (top, bottom, left, right) patch rect 2 20 5 [expr -$y1] [expr $z1-$cover] $y1 $z1 patch rect 2 20 5 [expr -$y1] [expr -$z1] $y1 [expr $cover-$z1] patch rect 2 5 10 [expr -$y1] [expr $cover-$z1] [expr $cover-$y1] [expr $z1-$cover] patch rect 2 5 10 [expr $y1-$cover] [expr $cover-$z1] $y1 [expr $z1-$cover] # Create the reinforcingfibers (left, middle, right) layer straight 3 175 $As [expr $y1-$cover] [expr $z1-$cover] [expr $y1-$cover] [expr $cover-$z1] layer straight 3 175 $As [expr $cover-$y1] [expr $z1-$cover] [expr $cover-$y1] [expr $cover-$z1] layer straight 3 115 $As [expr $y1-$cove

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