一种基于裂缝带与变应变比的混凝土损伤塑性本构计算方法
By using a method based on crack bands and variable strain ratios, cracking strain is transformed into crack opening displacement, and the variable strain ratio coefficient is dynamically calculated. This solves the problems of mesh sensitivity and inaccurate stiffness degradation prediction in finite element analysis, and improves the simulation accuracy of concrete structures under complex loads.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANDONG UNIV
- Filing Date
- 2026-05-14
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies struggle to accurately track the unloading-reloading behavior of concrete materials under cyclic loading in finite element analysis, leading to inaccurate stiffness degradation predictions. Furthermore, traditional methods are prone to mesh sensitivity issues, affecting the reliability of structural energy dissipation analysis.
A concrete damage plastic constitutive calculation method based on crack zone and variable strain ratio is adopted. By converting cracking strain into crack opening displacement and combining fracture energy to adaptively correct the softening coefficient, the variable strain ratio coefficient under tension and compression is dynamically calculated, the nonlinear unloading-reloading stiffness degradation trajectory is reconstructed, and the data is cleaned and formatted for output.
It improves the computational stability and solution convergence rate of finite element analysis, accurately characterizes the stiffness degradation characteristics of concrete materials, and enhances the accuracy of predicting the mechanical response of structures under cyclic loads.
Smart Images
Figure CN122197166B_ABST