No abstract

The Structural Health Monitoring (SHM) in civil engineering faces several challenges. The main issue lies in defining a reliable and precise methodology of damage detection and localization in order to allow preventive maintenance or to enable the definition of repair actions. In this paper, a new methodology of SHM is proposed. Using Vibration-Based Damage Detection Methods (VBDDM), a damage detection and localization algorithm is elaborated and tested on a Finite Element Model (FEM) of an existing building. In a first case, the damage is introduced artificially by a local reduction of stiffness, while in the second case, the damage is calculated according to a real seismic signal from the italian L'Aquila earthquake. The advantages and disadvantages of each dynamic monitoring technique are discussed and the usefulness of the algorithm is highlighted.

This work presents a new composite beam model based on discrete layer theory. It enables the automatic verification of the continuity of transverse shear stresses by taking into account the Heaviside step function. The transverse shear is represented by a sine function which improves the accuracy of the results on the transverse shear stress. The membrane refinement cosine function improves the warping of the straight section in bending deformations. In order to validate the proposed model, several problems in bending and free vibration are presented. For sandwich composite beams, the proposed new model satisfies exactly and automatically the continuity conditions of displacements and stresses at the interfaces, as well as the boundary conditions.

No abstract

No abstract

No abstract

No abstract

No abstract