本帖最后由 senja 于 2012-4-20 16:24 编辑
大概操作了一下,方法和思路是对的,可能选择的区域或者范围不对,仅供参考。
!20m空心板梁
!分离式模型,约束方程法,初应变施加预应力,单位mm,c50混凝土
!1.定义单元与材料性质
finish
/clear
/prep7
et,1,solid65
et,2,link8
mp,ex,1,21945 !定义混凝土的弹性模量、泊松比和密度
mp,prxy,1,0.2
mp,dens,1,2300e-12
fc=23.1 !混凝土单轴抗压强度和单轴抗拉强度
ft=1.89
tb,concr,1 !定义混凝土材料及相关参数,关闭压碎
tbdata,,0.4,0.90,ft,-1
tb,miso,1,,11 !定义混凝土应力应变曲线,用miso模型
tbpt,,0.0002,fc*0.19
tbpt,,0.0004,fc*0.36
tbpt,,0.0006,fc*0.51
tbpt,,0.0008,fc*0.64
tbpt,,0.001,fc*0.75
tbpt,,0.0012,fc*0.84
tbpt,,0.0014,fc*0.91
tbpt,,0.0016,fc*0.96
tbpt,,0.0018,fc*0.99
tbpt,,0.002,fc
tbpt,,0.0033,fc*0.85
mp,ex,2,2.0e5 !钢筋材料的弹性模量和泊松比
mp,prxy,2,0.3
mp,ex,3,1.95e5 !预应力钢筋的弹性模量、泊松比和密度
mp,prxy,3,0.3
mp,dens,3,7921e-12
tb,biso,2 !定义钢筋应力应变曲线,用biso模型
tbdata,,300,0
r,1,140 !预应力钢绞线的公称截面面积
r,2,490.9 !直径25mm的钢筋截面面积490.9mm2
r,3,113.1 !直径12mm的钢筋截面面积113.1mm2
r,4,50.3 !直径8mm的钢筋截面面积50.3mm2
!2.创建几何模型
k,1 !混凝土
k,2,,100.001
k,3,100.001,149.999
k,4,50.000,800.000
k,5,99.999,850.000
k,6,890.001,850.000
k,7,939.999,800.000
k,8,890.001,149.999
k,9,990,100.001
k,10,990,0
a,1,2,3,4,5,6,7,8,9,10
vext,all,,,,,20000
cyl4,495.000,450.000,312.601,,,,20000
vsbv,1,2
wpcsys,-1
wprota,,90
wpoff,,,-36.400
vsbw,all
wpoff,,,-41.1034
vsbw,all
wpoff,,,-652.8916
vsbw,all
wpcsys,-1 !循环切分,切出箍筋位置
vsel,s,loc,y,36.400,730.392
wpcsys,-1
wpoff,,,190
vsbw,all
wpoff,,,60
vsbw,all
*do,i,1,15
wpoff,,,100
vsbw,all
*enddo
*do,i,1,41
wpoff,,,200
vsbw,all
*enddo
wpoff,,,100
vsbw,all
wpoff,,,100
vsbw,all
*do,i,1,41
wpoff,,,200
vsbw,all
*enddo
*do,i,1,15
wpoff,,,100
vsbw,all
*enddo
wpoff,,,60
vsbw,all
wpcsys,-1
wprota,,,-90
wpoff,,,-139.0012
vsbw,all
wpoff,,,-712.0026
vsbw,all
wpcsys,-1 !切出拉区纵筋竖向位置
vsel,s,loc,y,36.400,77.5034
wprota,,,-90
wpoff,,,-45
vsbw,all
*do,i,1,18
wpoff,,,-50
vsbw,all
*enddo
wpcsys,-1 !切出压区纵筋竖向位置
vsel,s,loc,y,730.392,850.000
wprota,,,-90
wpoff,,,-139.0012
vsbw,all
wpoff,,,-206.0007
vsbw,all
wpoff,,,-300.0012
vsbw,all
wpoff,,,-206.0007
vsbw,all
wpcsys,-1 !切出纵筋水平位置
vsel,all
wprota,,90
wpoff,,,-127.504
vsbw,all
wpoff,,,-691.2989
vsbw,all
wpcsys,-1
nummrg,all,,,,low !整理
numcmp,all !压缩编号
!3.划分钢筋网格
lsel,none !箍筋,定义组件,设置属性等
wpcsys,-1
wprota,,,-90
wpoff,,,-128.6012
vsbw,all
wpoff,,,-732.8026
vsbw,all
wpcsys,-1
wprota,,90
wpoff,,,-26
vsbw,all
wpoff,,,-803.2003
vsbw,all
lsel,s,loc,x,128,862
lsel,r,loc,y,25,820
cm,g1,line
lsel,s,loc,x,131,858
lsel,r,loc,y,27,818
cm,g2,line
lsel,s,loc,y,36.4
lsel,a,loc,y,77.5
lsel,a,loc,y,128
lsel,a,loc,y,730
cm,g3,line
lsel,s,loc,x,139
lsel,a,loc,x,345
lsel,a,loc,x,851
lsel,a,loc,x,645
cm,g4,line
cmsel,s,g1
cmsel,u,g2
cmsel,u,g3
cmsel,u,g4
以上红色部分为线选择部分。
1. 横截面线图
2. 组件g1线条
3.组件g2线条
4.最后选择的线框
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