CivilFEM钢结构简支梁

数值模拟 5年前 (2013-01-21) 1,347 人围观 12

如下图所示,钢结构简支梁,受均布荷载作用。截面采用欧洲规范的IPE200结构钢截面,本例练习用Eu.3规范做梁的结构工作性能检查。

w=2.5kN/m

a=12m

梁单元采用Beam3,长度和力的单位分别采用m,kN。

APDL

FINISH
~CFCLEAR,,1 ! Not needed
! Title
/TITLE,CivilFEM Example 0601. Pure Bending
! CivilFEM Setup: Code & Units
~UNITS,,LENG,M
~UNITS,,TIME,S
~UNITS,,FORC,KN
~CODESEL,EC3,EC2,,,EC8
/PREP7
! CivilFEM Preprocessor
! ————————————————–
! Materials
! Mat 1: Fe430
~CFMP,1,LIB,STEEL,EC3,Fe 430,0,0,0
! Element Types
ET,1,BEAM3 ! Type 1: 2D Beam
! Cross Sections
~SSECLIB,1,1,1,7 !IPE 200
! Beam & Shell properties
~BMSHPRO,1,BEAM,1,1,,,3,1,0, ! Beam Property
! Ansys Preprocessor
! ————————————————–
! Nodes
N, 1 $ N,25,12 $ FILL, 1,25
! Elements
E,1,2
EGEN,24,1,1
EPLOT
/SOLU
! Ansys Solution
! ————————————————–
! Displacements
D, 1,UX
D, 1,UY
D,25,UY
! Apply Load
SFBEAM,ALL,1,PRES,2.75
! Solve
SOLVE
/POST1
! CivilFEM Postprocessor
! ————————————————–
! Read results
~CFSET,,1,1 !First load case
! Plot bending moment MZ
~PLLSFOR,M,Z
! Eurocode No.3 Check in Bending
~CHKSTL,BENDING,-Z,PARTIAL
! Plot Check Results
~PLLSSTL,CRT_TOT ! Eurocode No.3 Criterion (Must be < 1.00)
!List Bending Check Results
~PRSTL,DETAILED,BOTH,12,ALL

加载后的模型图

绘制梁弯矩图

用~PLLSSTL命令显示规范检查结果,基于结构外力与抗力之间的比值,在<1.0的时候,结构安全。而进行规范检查,也是CivilFEM的主要优势