ABAQUS建模规范化方法总结

一.命名规则

学习建模过程，可以使用示例中的命名规则，设计标准模型参见标准模型创建方法

二.确定构件使用的坐标系

构件坐标系是应该首先确定并记录的信息，以方便后续确定参考点坐标。

本例中坐标轴Z 轴沿模型截面中心向上，X 轴为荷载施加方向，荷载沿X 轴正向施加。Y 轴与模型侧面垂直。如图所示。

三.材料定义

1 混凝土材料的定义

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1.1. 密度/Density

Mass Density=2.5e-9 tone/mm³（=2500kg/m³）

1.2. 弹性/Elastic

Machanical/Elasticity/Elastic

定义参数：

杨氏模量：

Young’s Modulus=34500 N/mm²；

泊松比：

Poisson’s Ratio=0.2

1.3. 塑性/Concrete Damage Plasticity

Mechanical/Plasticity/Concrete Damage Plasticity

A baqus/CAE User’s Guide 12.9.2_Defining concrete damage plasticity

************************************************************** Dilation Angle

Dilation angle, , in the p–q plane. Enter the value in

degrees.

Eccentricity

Flow potential eccentricity, . The eccentricity is a small positive number that defines the rate at which the hyperbolic flow potential approaches its asymptote. The default is .

fb0/fc0

, the ratio of initial equibiaxial compressive yield stress to initial uniaxial compressive yield stress. The default

value is

K

, the ratio of the second stress invariant on the tensile

meridian, , to that on the compressive meridian, , at initial yield for any given value of the pressure invariant p such that the maximum principal stress is negative, . It must satisfy the condition . The default value is .

Viscosity Parameter

Viscosity parameter, , used for the visco-plastic

regularization of the concrete constitutive equations in

Abaqus/Standard analyses. This parameter is ignored in

Abaqus/Explicit. The default value is . (Units of .)

Temp

Temperature.

Field n

Predefined field variables.

*************************************************************** 定义参数：

扩散角：

Dilation Angle=38°；偏心率：Eccentricity=0.1；

（默认值）双轴压缩屈服应力与单轴压缩屈服

应力的比值：

fb0/fc0=1.16；（默认值）拉伸子午面与压缩子午

线的第二应力不变量之比：

K（K c）=2/3;

粘度系数：

Viscosity Parameter=默认的参数为0.0s，选取值为0.00001s 一般而言，

粘性系数取值越小，分析越不容易收敛。这是经验问题。至

于是什么原因，这里还需要进一步的讨论。

1.3.1 受压本构参数/Compressive Behavior——C50 混凝土

Compression Harding（应变硬化）：

受压应变—非弹性应变/Compression Stress-Inelastic Strain

compression hardening

22.68 0

32.4 0.000739885

18.5152 0.00282136

10.8008

0.00472398

7.40635

0.00650139

5.58672

0.00823314

4.4694

0.00994455 3.7184

0.0116453

3.18069 0.0133399

2.77743 0.0150306

Compression Damage

受压损伤因子—非弹性应变/Compression Damage factor-Inelastic Strain

COMPRESSION DAMAGE

0 0