Reinforced Concrete Beams under Shock Loading, Linear and Nonlinear Response

摘要

In the current engineering practice the design of impact loaded, physically non-linear structures is usually carried out with the relatively simple single degree-of-freedom system. The question arises whether the model is always adequate. Intuitively, the deformed shape of the structure due to rapidly or locally varying loads is not identical to the deformed shape as a result of static loading conditions. In the report a model has been developed using discrete mass elements and spring elements, in order to take into account the inertias and deformations necessary to properly describe the behavior of a beam under transient loading conditions. Because of the probability of relatively short wave phenomena, it has been decided to implement the theory according to Timoshenko in the model. This means that translation and rotation inertia as well as bending and shear deformation are taken into account. As the model is rather new and the problem of elasto-plastic dynamics is not too well known, much attention has been paid to the verification and validation of the computation technique itself.