Research Status of Impact on Concrete Structures

Abstract

Concrete is currently the most widely used material in civil engineering structures. In addition to being subjected to dead loads and live loads during its service, it may also encounter accidental loads such as impacts and collisions. Previous research has shown that the forced characteristics of concrete structures under dynamic loads such as impacts and collisions are very different from those under static loads. In order to summarize the dynamic characteristics of concrete structures and measures to reduce its impact damage, this article firstly introduced the mechanical characteristics of concrete structures under impact loads, including the dynamic force characteristics of concrete structures under high-speed, low-speed impact loads and confining pressure; Then reviews the achievements and development of domestic and foreign scholars on concrete impact research in recent years: the research status of concrete dynamic constitutive structure is summarized from the aspects of the sensitivity of concrete strength strain rate and the dynamic constitutive model; the research status of impact resistance of concrete structure is carried out from the aspects of high-speed, low-speed impact load and measures to reduce its impact damage. Finally the development trend of concrete structure impact is summarized and prospected, which will provide some references for the subsequent research on concrete structure impact.