Abstract
Impact loads may cause serious or even fatal damage to the structure (component), in most existing specifications in China, and there are no special terms that take impact load into consideration. So, the response analysis of the structure (component) under impact loads is very important. In this paper, the sensitivity analysis was conducted for the 22 parameters of the Holmquist–Johnson concrete (HJC) constitutive model of concrete, and the sensitive parameters of the HJC model are identified with A, B, G, Pl, μl, and fc respectively. LS-DYNA nonlinear transient finite element analysis code was used for this paper. Based on the validation of finite element modeling and choosing midspan deflection of RC beams and impact loads as response indices, some influencing factors on RC beams under falling weight impact were investigated, such as the mass and speed of falling weight, impact position, the strength of concrete and rebar, longitudinal reinforcement ratio, and the span of the beam.
Highlights
Impact is a kind of disaster, which is divided in direct menace, such as terrorist attacks and vehicle collision, and indirect menace caused by secondary disasters of traffic accidents and earthquakes. us, it can be seen that the threat of impact on the structure is increasing
The problems of impact loads have been studied with the different methods. e dynamic property of concrete materials is an important factor to determine the accuracy of the structure using computer simulation, so the dynamic property of concrete materials is one of the key research topics
Experimental method is the main way to study the dynamic properties of concrete, and the hydraulic loading, falling weight impact loading device, split Hopkinson pressure bar (SHPB) loading, and plate impact loading are the popular ways for concrete fast loading
Summary
Impact is a kind of disaster, which is divided in direct menace, such as terrorist attacks and vehicle collision, and indirect menace caused by secondary disasters of traffic accidents and earthquakes. us, it can be seen that the threat of impact on the structure is increasing. E dynamic property of concrete materials is an important factor to determine the accuracy of the structure using computer simulation, so the dynamic property of concrete materials is one of the key research topics It is the strain-rate effect that causes the main differences between the dynamic and static properties of concrete materials, which refers to the phenomenon that higher mechanical behavior of the concrete with loading speed increasing [1]. Abbas et al [17] had established the finite element model of the RC beam about impact problem and compared the results obtained by the model simulation with the experimental data, which verified the reliability of the finite element method. The emphasis is on verifying the reliability with [19] On this basis, the factors affecting the impact response of RC beams will be studied, such as the quality and speed of falling weight, impact position, the strength of concrete and rebar, and longitudinal reinforcement ratio
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
