Drucker-Prager材料一致率型本构模型  

A DRUCKER-PRAGER CONSISTENT RATE-DEPENDENT MODEL

作　　者：肖诗云[1] 林皋[1] 王哲[2] 

机构地区：[1]大连理工大学海岸及近海工程国家重点实验室,大连116024 [2]北方交通大学土木建筑学院,北京110044

出　　处：《工程力学》2003年第4期147-151,共5页Engineering Mechanics

基　　金：国家自然科学基金资助重点项目(50139010)

摘　　要：根据一致粘塑性模型理论,结合所做的混凝土单轴动力特性试验,对常用的混凝土本构模型Drucker-Prager模型进行改进,引入应变率的影响,推导了Drucker-Prager材料的一致率型本构模型;并与试验的应力应变曲线进行比较,结果表明本文模型能够较好地反映混凝土的动力特性;最后,通过对一平面梁进行计算,并与线弹性及率无关塑性结果进行比较,结果表明考虑了应变率的影响后梁的动力特性发生了较大的变化。According to viscoplastic consistency model and the dynamic experimental results of concrete, a Drucker-Prager consistent rate-dependent model is set up. It evolves from the classical Drucker-Prager model by incorporating the effect of strain rate on concrete. Compared with experiment results, the model can predict the dynamic behavior of concrete accurately. A plane beam is studied using the model. The results are compared with those of the linear elastic model and rate-independent plastic model. The comparison shows that the dynamic behavior of the beam exhibits significant change when the effect of strain rate is considered.

关 键 词：粘塑性 率相关 应变率 内变量 动力反应 

分 类 号：TU528[建筑科学—建筑技术科学]