钢筋混凝土微平面动态本构模型

在B．P．Bazant等人提出的混凝土微平面模型基础上通过引入钢筋的影响提出了一个钢筋混凝土动态本构模型。本构模型的建立通过平行耦合假定考虑钢筋和混凝土的相互作用。混凝土模型采用能反映各种复杂受力行为并被充分验证的M5微平面模型，钢筋采用Cowper—Symonds型率相关的双线性模型。最后参照M4微平面模型对应变率效应的处理方法，将提出的钢筋混凝土模型推广到动态模型范畴。此模型可适合钢筋混凝土的静力、动力显式分析。

Microplane Dynamic Model for Reinforced Concrete

Based on concrete microplane model developed by Bazant B. P. et al. , a dynamic model for reinforced concrete is proposed to consider the action of reinforcing steel bars. The model is founded by introducing parallel coupling assumption to simulate the interaction between concrete and steel bars. Concrete is modeled by recently published micro-plane model M5 , which can simulate various physical properties of concrete and has been calibrated by many test data, while steel bars are represented by bilinear model with rate effect of Cowper-Symonds. With reference to M4, effect of strain rate has been taken into account, which generalizes the reinforced concrete model. The model can be used in static or dynamic explicit analysis of reinforced concrete structure.