基于ansys的钢桁架桥的分析和计算

基于ansys的钢桁架桥的分
析和计算
姓名: 马彦
学院：建筑与环境
专业：工程力学
学号：1043055033
指导老师：朱哲明
2013/6/15
1.问题简述
钢桁架桥简图如下，尺寸如图，单元长12m，高16m。

设桥面板为0.3m厚的混凝土板。

杆件截面号形状规格
端斜杆 1 工字梁400*400*16*16
上下弦 2 工字梁400*400*12*12
横向连接梁 2 工字梁400*400*12*12
其他腹杆 3 工字梁400*300*12*12
参数钢材混凝土
EX 2.1x1011 3.5x1010
PRXY 0.3 0.1667
DENS 7850 2500
2.材料实常数
3.半横架桥模型
镜面对称，生成整体模型
3.施加约束及受力
4.计算及分析结果
◆整体位移云图
◆结点总位移矢量图
◆单元第一主应力云图
◆单元第二主应力云图
◆单元第三主应力云图
◆节点位移结果
PRINT U NODAL SOLUTION PER NODE
***** POST1 NODAL DEGREE OF FREEDOM LISTING *****
LOAD STEP= 1 SUBSTEP= 1 TIME= 1.0000 LOAD CASE= 0
THE FOLLOWING DEGREE OF FREEDOM RESULTS ARE IN THE GLOBAL COORDINATE
SYSTEM
NODE UX UY UZ USUM
1 0.18808E-02-0.20919E-01 0.70316E-03 0.21015E-01
2 0.11411E-02-0.21354E-01 0.59772E-0
3 0.21393E-01
3 0.14813E-02-0.20809E-01 0.11202E-02 0.20892E-01
4 0.15919E-02-0.20373E-01 0.11392E-02 0.20467E-01
5 0.22549E-02-0.18918E-01 0.10528E-02 0.19081E-01
6 0.23458E-02-0.18310E-01 0.10055E-02 0.18487E-01
7 -0.10050E-02-0.18459E-01-0.38731E-02 0.18887E-01
8 -0.11376E-02-0.19066E-01-0.38598E-02 0.19486E-01
9 0.24977E-02-0.12074E-01 0.72603E-03 0.12351E-01
10 0.29237E-02-0.11079E-01 0.68719E-03 0.11479E-01
11 -0.35033E-02-0.10438E-01-0.84626E-02 0.13887E-01
12 -0.38537E-02-0.10965E-01-0.84226E-02 0.14353E-01
13 0.27521E-02 0.0000 0.0000 0.27521E-02
14 0.34768E-02 0.0000 0.0000 0.34768E-02
15 0.82671E-03-0.17947E-01 0.14911E-03 0.17967E-01
16 0.67748E-03-0.19250E-01 0.10648E-03 0.19262E-01
17 0.42077E-02-0.19398E-01 0.59595E-02 0.20725E-01
18 0.40812E-02-0.18095E-01 0.59727E-02 0.19488E-01
19 0.40101E-03-0.10784E-01 0.34385E-04 0.10791E-01
20 0.34470E-03-0.12307E-01 0.25523E-06 0.12312E-01
21 0.69212E-02-0.11199E-01 0.10204E-01 0.16656E-01
22 0.65820E-02-0.10142E-01 0.10244E-01 0.15847E-01
23 0.0000 0.0000 0.0000 0.0000
24 0.0000 0.0000 0.0000 0.0000
MAXIMUM ABSOLUTE VALUES
NODE 21 2 22 2
VALUE 0.69212E-02-0.21354E-01 0.10244E-01 0.21393E-01
◆单元受力结果
PRINT ELEMENT TABLE ITEMS PER ELEMENT
***** POST1 ELEMENT TABLE LISTING *****
STAT CURRENT CURRENT
ELEM ZHOU_I ZHOU_J
1 -49659. 7936.3
2 -42695. -3502.7
3 -9873.9 -28642.
4 9567.9 -51440.
5 -15016. 23374.
6 -22120. -5510.4
7 -26981. -11385.
8 -33355. 18549.
9 -17656. -15556.
10 -16095. -16301.
11 -16203. -16943.
12 -12683. -20132.
13 4836.6 5157.1
14 -17901. -18351.
15 -2331.6 23001.
16 -18331. -20015.
17 -6067.9 50464.
18 -19568. -26493.
19 -5052.8 51411.
20 -26836. -34142.
21 -23626. -29919.
22 -32522. -21349.
23 -35649. -25215.
24 -699.47 1061.5
25 690.13 -1048.3
26 5802.4 -1462.3
27 -9677.8 5182.9
28 16212. -4765.1
29 -4310.8 3979.1
30 -25.038 0.0000
31 -9.3064 0.0000
32 23.898 0.0000
33 -3569.2 -42609.
34 8110.9 -49823.
35 -5544.6 -22051.
36 -11343. -27005.
37 18453. -33238.
38 -28592. -9977.1
39 -51593. 9648.5
40 23614. -15193.
41 -16998. -16116.
***** POST1 ELEMENT TABLE LISTING *****
STAT CURRENT CURRENT
ELEM ZHOU_I ZHOU_J
42 -20120. -12682.
43 -15489. -17761.
44 -16350. -16082.
45 5157.1 4836.6
46 -18351. -17901.
47 -2225.2 22850.
48 -18463. -19869.
49 -6087.5 50530.
50 -19228. -26843.
51 -5332.4 51796.
52 -21374. -32473.
53 -25205. -35655.
54 -34114. -26894.
55 -29953. -23607.
56 -1061.5 699.47
57 1048.3 -690.13
58 5171.8 -9672.1
59 -1448.6 5796.5
60 3928.8 -4269.3
61 -4732.8 16215.
62 -20.844 0.0000
63 -5.2944 0.0000
64 36.585 0.0000
MINIMUM VALUES
ELEM 39 4
VALUE -51593. -51440.
MAXIMUM VALUES
ELEM 40 51
VALUE 23614. 51796.
5.命令流文件
/FILNAM,Structural
/TITLE,Truss Bridge Static Analysis
/COM,Structural
/prep7
et,1,beam4
et,2,shell63
sectype,1,beam,i,,0 !定义工字型截面secoffset,cent !截面至心不偏移secdata,0.4,0.4,0.4,0.016,0.016,0.016,0,0,0,0 !定义工字型截面参数sectype,2,beam,i,,0
secoffset,cent
secdata,0.4,0.4,0.4,0.012,0.012,0.012,0,0,0,0
sectype,3,beam,i,,0
secoffset,cent
secdata,0.3,0.3,0.4,0.012,0.012,0.012,0,0,0,0
r,1,0.0187,0.00017,0.00054,0.4,0.4,0, !定义单元实常数r,2,0.0141,0.128e-3,0.415e-3,0.4,0.4,,
r,3,0.0117,0.541e-4,0.324e-3,0.3,0.4,,
r,4,0.3,,,,,,
MP,EX,1,2.1E11
MP,PRXY,1,0.3
MP,DENS,1,7850
MP,EX,2,3.5E10
MP,PRXY,2,0.1667
MP,DENS,2,2500
N,,0,0,-5,,,, !创建节点，复制结点NGEN,4,4,ALL,,,12,,,1,
NGEN,2,1,ALL,,,,,10,1,
NGEN,2,1,2,10,4,,16,,1,
NGEN,2,1,3,11,4,,,-10,1,
TYPE,1
MAT,1
REAL,1
ESYS,0 !单元坐标系SECNUM,1
TSHAP,LINE
E,11,14 !建立单元
TYPE,1 MAT,1 REAL,1 ESYS,0 SECNUM,2 TSHAP,LINE E,2,6
E,6,10
E,10,14 E,1,5
E,5,9
E,9,13
E,3,7
E,7,11
E,4,8
E,8,12
E,1,2
E,3,4
E,5,6
E,7,8
E,9,10
E,13,14 TYPE,1 MAT,1 REAL,1 ESYS,0 SECNUM,3 TSHAP,LINE E,3,6
E,6,11
E,4,5
E,5,12
E,2,3
E,1,4
E,6,7
E,5,8
E,10,11 E,9,12 TYPE,2 MAT,2 REAL,1 ESYS,0
TSHAP,QUAD
E,1,2,6,5
E,5,6,10,9
E,9,10,14,13
NSYM,X,14,ALL ESYM,,14,ALL
NUMMRG,ALL,,,,LOW NUMCMP,ALL FINISH
/SOL
NSEL,S,,,23,24
D,ALL,,,,,,UX,UY,UZ,,, NSEL,S,,,13,14
D,ALL,,,,,,UY,UZ,,, NSEL,S,,,1,2
F,ALL,FY,-100000 ALLSEL,ALL ACEL,0,10,0, ANTYPE,0
SOLVE
FINISH
/POST1
PLDISP,2
PLNSOL,U,SUM,0,1
PLVECT,U,,,,VECT,NODE,ON,0
ETABLE,zhou_i,SMISC,1
ETABLE,zhou_j,SMISC,7
ETABLE,zhou_i,SMISC,2
ETABLE,zhou_j,SMISC,8
ETABLE,zhou_i,SMISC,6
ETABLE,zhou_j,SMISC,12
PRETAB,ZHOU_I,ZHOU_J,JIAN_I,JIAN_J,WAN_I,WAN_J PLLS,ZHOU_I,ZHOU_J,1,0
PRNSOL,U,COMP
FINISH
/EXIT。