基于有限元分析的塑性混凝土本构模型对比研究  

Comparative study of plastic concrete constitutive models based on finite element analysis

作　　者：张宝增[1] 江志安[1] 唐贝 ZHANG Baozeng;JIANG Zhi’an;TANG Bei(Sinohydro Foundation Engineering Co.,Ltd.,Tianjin Key Laboratory of Ground and Foundation Engineering,Tianjin 301700,China;Tianjin University,State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation,Tianjin 300350,China)

机构地区：[1]中国水电基础局有限公司天津市地基与基础工程企业重点实验室,天津301700 [2]天津大学水利工程智能建设与运维全国重点实验室,天津300350

出　　处：《水利建设与管理》2024年第6期28-36,共9页Water Conservancy Construction and Management

摘　　要：塑性混凝土力学性能介于混凝土与土体之间,其本构模型选择尚无统一标准。本文采用有限元方法,结合实例工程,分别采用塑性损伤和硬化土两种本构模型对塑性混凝土进行模拟,系统对比分析两种本构模型的计算差异性。结果表明,两种本构模型的计算结果规律基本一致,塑性损伤本构模型表达式简单,计算结果偏保守、安全,而硬化土体本构模型计算结果准确度更高,但模型参数测定较为复杂,后续可基于硬化土本构模型对塑性混凝土本构模型进行改进。Plastic concrete possesses mechanical properties that lie between those of concrete and soil,yet there remains no unified choice for its constitutive model.In this paper,utilizing the finite element method and case studies,plastic concrete is simulated using two constitutive models:plastic damage and hardening soil.A systematic comparative analysis is conducted on the computational differences between the two models.The results indicate that the computational outcomes of both models are generally consistent.The plastic damage constitutive model exhibits simplicity in expression,yielding conservative and safe results,while the hardening soil constitutive model offers higher accuracy in computations,albeit with more complex parameter determination.Subsequent improvements to the plastic concrete constitutive model could be based on the hardening soil model.

关 键 词：塑性混凝土 塑性损伤本构模型 硬化土本构模型 变形协调性 

分 类 号：TV52[水利工程—水利水电工程]