Development and verification of strain-softening model considering deformation modulus degradation in FLAC3D

LI Ying-jie; ZHANG Ding-li; LIU Bao-guo

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Development and verification of strain-softening model considering deformation modulus degradation in FLAC3D

更新时间：2026-06-25

- Development and verification of strain-softening model considering deformation modulus degradation in FLAC3D
- Vol. 32, Issue S2, (2011)
- 作者机构：
  
  1. 北京交通大学土木建筑工程学院,北京,100044
  2. 辽宁工程技术大学力学与工程学院,辽宁,阜新,123000
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU443
- Online First：26 August 2011，
  
  Published：2011
- 稿件说明：
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LI Ying-jie, ZHANG Ding-li, LIU Bao-guo. Development and verification of strain-softening model considering deformation modulus degradation in FLAC3D[J]. 2011, 32(S2).
DOI：

LI Ying-jie, ZHANG Ding-li, LIU Bao-guo. Development and verification of strain-softening model considering deformation modulus degradation in FLAC3D[J]. 2011, 32(S2). DOI：

摘要

FLAC3D软件中的应变软化本构模型是通过抗剪强度参数劣化来实现的，没有考虑变形模量劣化造成的影响。针对这一问题，采用了变形模量劣化的损伤本构模型，详细推导了劣化损伤本构模型的差分格式，研究该模型在FLAC3D中二次开发的流程，在VC++环境下实现了劣化损伤本构模型在FLAC3D中的二次开发；通过与深埋圆形洞室应变软化数值解算例对比，进一步验证了该模型弹塑性和损伤的力学性质，分析了变形模量劣化对围岩变形特性的影响。由于该模型能够反映围岩的劣化损伤特性和大变形特点，因此在工程应用中有一定的实用价值

Abstract

The strain-softening constitutive model in the fast Lagrangian analysis of continua in three dimensions(FLAC3D) implemented by shear strength parameters degrading and neglecting the influences of deformation-modulus degradation. For this case

based on the damage constitutive model of deformation modulus degradation

the difference scheme is deduced in detail; and the flow diagram of the model in FLAC3D as well as the secondary developed degradation damage constitutive model in FLAC3D with VC++ environment are studied. Compared with a numerical solutions from deep circular tunnel strain-softening model

elastoplastic and damage mechanical characters are further verified; and the influence of deformation modulus degradation on the deformation behaviours of surrounding rockmasses is analyzed. Because the characteristics of the damage and degradtion and the large deformation of the surrounding rockmasses can be reflected by this constitutive model

it has great using value in practice application

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