混凝土正交各向异性动态损伤本构模型研究

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (3) : 23-26.

论文

混凝土正交各向异性动态损伤本构模型研究

陈士海，张安康，杜荣强，张子华

作者信息 +

orthotropic dynamic damage constitutive model for concrete

CHEN Shi-hai, ZHANG An-kang , DU Rong-qiang, ZHANG Zi-huai

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摘要

为建立混凝土的正交各向异性动态损伤本构，首先采用动力放大系数的形式考虑材料的应变率效应，然后基于Sidoroff能量等价原理，建立动态条件下单元体的损伤刚度矩阵。同时在损伤演化模型中，采用Mazars损伤模型描述主轴方向的损伤变量。另外采用适用于正交各向异性的Hoffman屈服破坏准则，并考虑损伤及动力放大系数对强度的修正。以建筑结构受爆破震动荷载作用的实验资料，对本模型进行了验证。

Abstract

In order to establish orthotropic dynamic damage constitutive model for concrete, dynamic increase factors (DIF) were first used for considering strain effects, then based on Sidoroff’s energy equivalent theory, the dynamic damage elastic matrix of elements was found., and Mazars’ damage model was used for calculating damage scalars of principle axial directions, and orthotropic Hoffman failure criteria was adopted, which intensities was modified for damage and DIF. The model was proved by a destroying experiment of a structure under blasting vibration.

导出引用

陈士海;张安康;杜荣强;张子华. 混凝土正交各向异性动态损伤本构模型研究[J]. 振动与冲击, 2012, 31(3): 23-26

CHEN Shi-hai;ZHANG An-kang;DU Rong-qiang;ZHANG Zi-huai. orthotropic dynamic damage constitutive model for concrete[J]. Journal of Vibration and Shock, 2012, 31(3): 23-26