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Soil-structure interaction, contact, and interface modeling in Abaqus
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Basé sur la classification professionnelle SOC
Domain-specific knowledge and Q&A for various engineering fields
Diagnose and fix Abaqus convergence issues
Generate Abaqus .inp files from natural language or templates
Provide mesh quality advice and element selection guidance
Geotechnical boundary conditions, initial conditions, and loading for Abaqus
Geotechnical constitutive model selection and parameter calibration for Abaqus
| name | geotech-interface |
| version | 1.0.0 |
| description | Soil-structure interaction, contact, and interface modeling in Abaqus |
| description_cn | 土-结构相互作用、接触与界面建模（Abaqus） |
| triggers | ["interface","界面","contact","接触","土结构","soil-structure","摩擦","friction","桩土","pile","衬砌","lining","支护","retaining","锚杆","anchor"] |
| priority | P1 |
| dependencies | [] |
| author | AbaqusGPT Team |
| tags | ["geotechnical","contact","interface","soil-structure-interaction"] |
Expert guidance on modeling soil-structure interaction, contact pairs, and interface behavior in geotechnical Abaqus simulations. Covers pile-soil, retaining wall-soil, tunnel lining-ground, and anchor-grout interfaces.
岩土 Abaqus 仿真中土-结构相互作用、接触对和界面行为的建模指导。覆盖桩-土、挡墙-土、隧道衬砌-围岩、锚杆-灌浆体界面。
*CONTACT PAIR, INTERACTION=SOIL_STRUCT, TYPE=SURFACE TO SURFACE
STRUCTURE_SURFACE, SOIL_SURFACE
*CONTACT PAIR, INTERACTION=SOIL_STRUCT, TYPE=NODE TO SURFACE
SOIL_SURFACE, STRUCTURE_SURFACE
*CONTACT
*CONTACT INCLUSIONS, ALL EXTERIOR
*CONTACT PROPERTY ASSIGNMENT
, , SOIL_STRUCT_PROP
*SURFACE INTERACTION, NAME=SOIL_STRUCT
*SURFACE BEHAVIOR, PRESSURE-OVERCLOSURE=HARD
*SURFACE BEHAVIOR, PRESSURE-OVERCLOSURE=EXPONENTIAL
10., 0.001
*FRICTION
0.4
| 界面类型 | μ 范围 | 推荐值 |
|---|---|---|
| 混凝土-砂土 | 0.40-0.60 | tan(2φ/3) |
| 混凝土-黏土 | 0.25-0.40 | tan(φ/2) |
| 钢-砂土 | 0.30-0.50 | tan(φ/2) |
| 钢-黏土 | 0.20-0.35 | tan(φ/3) |
| 土工膜-土 | 0.15-0.30 | 按试验 |
*FRICTION, ELASTIC SLIP=0.001
0.4
*COHESIVE BEHAVIOR
1e6, 1e6, 1e6
*DAMAGE INITIATION, CRITERION=QUADS
100., 50., 50.
*DAMAGE EVOLUTION, TYPE=ENERGY
0.1, 0.05, 0.05
** 桩侧摩擦
*SURFACE INTERACTION, NAME=PILE_SHAFT
*SURFACE BEHAVIOR, PRESSURE-OVERCLOSURE=HARD
*FRICTION
0.4
** 桩端承压
*SURFACE INTERACTION, NAME=PILE_TIP
*SURFACE BEHAVIOR, PRESSURE-OVERCLOSURE=HARD
*FRICTION
0.5
*SURFACE INTERACTION, NAME=WALL_SOIL
*SURFACE BEHAVIOR, PRESSURE-OVERCLOSURE=HARD
*FRICTION
0.35
*SURFACE INTERACTION, NAME=LINING_ROCK
*SURFACE BEHAVIOR, PRESSURE-OVERCLOSURE=HARD
*FRICTION
0.40
*GAP
** 注浆层可用 gap 单元模拟
*EMBEDDED ELEMENT, HOST ELSET=SOIL
ANCHOR_ELEMENTS
*SPRING, ELSET=ANCHOR_SPRING
1
*SPRING, ELSET=ANCHOR_SPRING
200000.
*SURFACE INTERACTION, NAME=GEOGRID_SOIL
*SURFACE BEHAVIOR, PRESSURE-OVERCLOSURE=HARD
*FRICTION
0.35
*CONTACT CONTROLS, STABILIZE=0.001
*CONTACT PAIR, ADJUST=0.001
*TIE, NAME=SOIL_CONCRETE_TIE
CONCRETE_SURFACE, SOIL_SURFACE
| 问题 | 原因 | 解决方案 |
|---|---|---|
| 接触不收敛 | 初始间隙/穿透过大 | 使用 ADJUST，检查网格对齐 |
| 应力震荡 | 主从面选反了 | 刚性大的面做主面 |
| 接触面穿透 | 罚刚度不够 | 增大 penalty stiffness |
| 大变形下接触丢失 | 有限滑移不够 | 改用 FINITE SLIDING |
| 摩擦力不对 | 法向压力不正确 | 检查地应力平衡是否完成 |
abaqusgpt ask "桩土接触怎么设置" --domain geotechnical
abaqusgpt ask "挡墙接触面摩擦系数取多少" --domain geotechnical
from abaqusgpt.skills.geotech_interface import GeotechInterfaceSkill
skill = GeotechInterfaceSkill()
result = skill.execute({
"query_type": "contact_setup",
"interface_type": "pile_soil",
"soil_type": "sand"
})