摘要
混凝土材料的动态本构关系对冲击载荷作用下的混凝土结构分析很重要。Lagrange分析方法是一种研究材料的动态力学性能特别是本构关系方面的常用方法。利用改进的φ74的直锥变截面Hopkinson压杆作为加载设备,测量在不同位置的应变波形,通过Lagrange分析得到了混凝土材料在冲击加载条件的应力—应变关系,并讨论了混凝土材料的应变率效应和重复加载对材料性能的影响,拓宽了Lagrange分析方法的应用。另外文中还指出利用拉氏方法分析混凝土材料时应该注意的问题。
Dynamic constitutive properties of concrete material play important roles in the analysis of concrete structures subjected to impact loading. Lagrange analysis is useful to study dynamic performance of material, especially the material constitutive relation. A set of strain profiles at several different locations of concrete specimen have been measured using a modified fight cone 74-mm-diameter Hopkinson pressure bar as loading equipment. By Lagrange analysis, the stress-strain relation of concrete material under dynamic loading is obtained. The strain rate effect of concrete material and the influence of repetitious load on dynamic properties of material is also discussed. The method of Lagrange analysis is extended and some suggestions are indicated when Lagrange analysis are used to analyze concrete material.
出处
《工程力学》
EI
CSCD
北大核心
2005年第4期163-166,共4页
Engineering Mechanics
基金
国家自然科学基金资助项目(10372097)
