强冲击载荷下钢筋混凝土的本构关系、破坏机理与数值方法

Constitutive model, failure mechanism and numerical method for reinforced concrete under intensive impact loading

钢筋混凝土不但在土木工程领域有着广泛的应用,而且其强动载荷下动态力学行为的研究在国家安全方面也具有十分重要的需求,其非均质、各向异性、多组分的特性亦给其动力学特性的研究带来诸多困难.本文针对强冲击载荷下钢筋混凝土的力学行为的研究进展进行了评述,具体包括:1)钢筋混凝土材料动态力学行为、破坏机理及动态本构模型;2)钢筋混凝土结构的侵彻及爆炸作用破坏机理;3)强冲击载荷下结构力学行为的数值模拟方法与软件.在此基础上,分析了针对强冲击载荷下钢筋混凝土的动态特性、侵彻机理和数值方法等方面的研究所存在的不足之处,并对需要进一步深入开展的研究工作进行了展望.

Reinforced concrete has been widely used in the field of civil engineering, and the dynamic mechanical behavior of reinforce concrete under intensive dynamic loading is also a very important requirement for national security. However, the characteristics of its heterogeneity, anisotropy and multicomponent bring many difficulties to the study of its dynamic characteristics. Research progress of mechanical behavior of the reinforced concretes under intensive impact loading were reviewed in this paper, including： 1） the dynamical properties and the macrosopic constitutive laws of the reinforced concretes; 2） mechanisms of the penetration of the reinforced concrete structures; 3） numerical simulation method and software of structural mechanical behavior under intensive impact loading. On this basis, the inadequacy of the research which including the dynamic characteristics, penetration mechanism and numerical methods of the reinforced concretes under intensive impact loading were analyzed, and the further in-depth research work need to do in the future was prospected.