CivilFEM 导入截面与混凝土壳截面

导入截面

首先，我们需要一个包含截面信息的txt文档：

'Angles' 'Angle 5x5' 501 8 50E-3 50E-3 5E-3 4E-3 0.0 0.0 5E-3 2E-3 0.0
'Angles' 'Angle 4.5x4.5' 501 8 0.045 0.045 4E-3 4.1E-3 0 0 4.5E-3 2E-3 0

用命令将txt里的上述命令读取出来，导入到截面库中：

FINISH
~CFCLEAR,,1

! CivilFEM Setup: Code & Units
~UNITS,SI
~CODESEL,EC3,EC2,,,EC8

/PREP7
! CivilFEM Preprocessor
! --------------------------------------------------
! 定义材料
~CFMP,1,LIB,STEEL,EC3,FE510        ! FE 510 (EC3)

! 定义用户库，这一步需要用菜单来定义
! Define cross section 1 as Angle 45X4
~SSECLIB,1,1,501,2   !Angle 45x45

通过上面的对话框来导入txt文件(但问题是我在软件界面中没有找到上面的这个对话框。。。)

混凝土壳体截面定义

实例描述

定义两个混凝土壳截面。第一个有恒定的厚度，另一个是变厚度。本例包括定义和列表显示两个梁&壳属性、列表显示实常数，单元采用SHELL43，单位为m。

对于壳体1

梁壳属性1(实常数1)

Section_I= Section_J = Section_K = Section_L = Shell vertex 1

几何属性：
THK    =   0.2       Vertex thickness
预应力：
MC = 0.048        Reinforcement Mechanical cover
ALPHA =  0         单元Y轴向预应力角
ASSXT = 1E-4    As/s reinforcement X Top
ASSXB = 2E-4   As/s reinforcement X Bottom
ASSYT = 2E-4   As/s reinforcement Y Top
ASSYB = 3E-4   As/s reinforcement Y Bottom

梁壳属性2(实常数2)

Section_I  = Shell vertex 2
Section_J = Shell vertex 3
Section_K = Shell vertex 4
Section_L = Shell vertex 5

Geometric Properties of shell vertex 2
THK    =   0.1         Vertex thickness
Reinforcement of shell vertex 2
MC = 0.048          Reinforcement Mechanical cover
ALPHA =  0           Reinforcement angle with element Y axis
ASSXT = 1E-4      As/s reinforcement X Top
ASSXB = 1.5E-4   As/s reinforcement X Bottom
ASSYT = 1.5E-4   As/s reinforcement Y Top
ASSYB = 2E-4      As/s reinforcement Y Bottom
Geometric Properties of shell vertex 3
THK    =   0.15       Vertex thickness
3点加强
MC = 0.048           Reinforcement Mechanical cover
ALPHA =  0           Reinforcement angle with element Y axis
ASSXT = 1.5E-4    As/s reinforcement X Top
ASSXB = 2E-4       As/s reinforcement X Bottom
ASSYT = 1E-4       As/s reinforcement Y Top
ASSYB = 3E-4       As/s reinforcement Y Bottom
壳顶点4的几何尺寸
THK    =   0.2        Vertex thickness
壳顶点4的几何参数
MC = 0.048           Reinforcement Mechanical cover
ALPHA =  0           Reinforcement angle with element Y axis
ASSXT = 1E-4      As/s reinforcement X Top
ASSXB = 1.5E-4   As/s reinforcement X Bottom
ASSYT = 2E-4      As/s reinforcement Y Top
ASSYB = 2.5E-4   As/s reinforcement Y Bottom

壳顶点5的几何属性

THK    =   0.25       Vertex thickness
壳顶5点加强：与4点相同

FINISH
~CFCLEAR,,1  ! Not needed

! CivilFEM Setup: Code & Units
~UNITS,SI
~CODESEL,EC3,EC2,,,EC8 ! Eurocodes: No.3, No.2 and No.8

/PREP7
! CivilFEM Preprocessor
! --------------------------------------------------
! 定义材料
~CFMP,1,LIB,CONCRETE,EC2,C20/25             !Concrete C20/25 (EC2)
~CFMP,2,LIB,REINF,EC2,S400                  !Reinforcing steel S400(EC2)

! 定义节点顶端
~SHLRNF,1,0.20,1,2,0.048,0.0001,0.0002,0.0002,0.0003    ! 壳顶点1
~SHLRNF,2,0.10,1,2,0.048,0.0001,0.00015,0.00015,0.0002  ! 壳顶点2
~SHLRNF,3,0.15,1,2,0.048,0.00015,0.0002,0.0001,0.0003   ! 壳顶点3
~SHLRNF,4,0.20,1,2,0.048,0.0001,0.00015,0.0002,0.00025  !壳顶点4
~SHLRNF,5,0.25,1,2,0.048,0.0001,0.00015,0.0002,0.00025  ! 壳顶点5

! 定义Beam & Shell Property
! Beam & Shell Property 1 (常数)
~BMSHPRO,1,SHELL,1,,,,43,,0,  !SHELL PROPERTY      !Beam & Shell Property 1
! Beam & Shell Property 2 (变化值)
~BMSHPRO,2,SHELL,2,3,4,5,43,,0,  !SHELL PROPERTY   !Beam & Shell Property 2
! List Beam & Shell Properties
~BMSHLST,1,2,1,1
! List Real Constants
RLIST, ALL

~SHLRNF, IVTX, THK, MAT, RMAT, MC, ASSXT, ASSXB, ASSYT, ASSYB, KRNF, ALP, THETA

定义预应力混凝土壳

IVTX：定义的桥顶点数量

THK：壳体端点厚度

MAT：材料和壳体顶点

RMAT：预应力材料.

MC：机械覆盖层 Mechanical cover.

ASSXT：顶部X面每单位长度预应力

ASSXB：底部X面每单位长度预应力

ASSYT：顶部X面每单位长度预应力

ASSYB：底部Y面每单位长度预应力

KRNF：预应力环境

• 0没有斜截面钢筋Not braced bars. (Value by default.)
• 1斜截面钢筋Braced bars

ALP：预应力钢筋和Y轴之间夹角，且为单元局部Y坐标系，只在木结构中考虑，默认 ALP=0

THETA：Angle of concrete compressive struts (sexagesimal degrees).