Luciano Mendes Bezerra

Study of stud shear connectors behaviour in composite beams with profiled steel sheeting

This work presents an FE study concerning the prediction of the shear resistance of headed stud connectors in composite beams with profiled steel sheeting subjected to static load. To confirm the FE simulation for the determination of the shear resistance of stud connectors, many experimental push-out tests whose results are available in the literature were used as a database. The FE simulations took into account the influence of many physical and mechanical parameters that affect the shear resistance of the stud connectors and such parameters are reported in the course of this paper. The prediction of the shear resistance of such studs is also calculated from currently used Standards, such as: AISC-LRFD and Eurocode-4. This research proposes new formulations for the prediction of the shear resistance and the results show that the proposed formulations significantly improve the prediction of the shear resistance of headed stud connectors subjected to static load.

Dynamic Analysis of a Beam with Additional Auxiliary Mass Spatial Via Spectral Element Method

This paper aims to propose a new spectral element with additional mass. Methodologies for structural health monitoring are used to include additional auxiliary mass in the structure to change of natural frequencies. Therefore, the additional auxiliary mass can enhance the effects of discontinuities in the structural dynamics response, which could improve the identification and location of the discontinuities. The proposed approach deals with the wave propagation in structures regarding the spectral analysis method. The change in the natural frequencies due the mass is examined by comparing the differences between the dynamic responses of the beam with and without additional auxiliary mass. Similar analyses also performed with the Galerkin assumed modes technique to validate the new spectral element. The proposed technique is validated with numerical simulation and then compared to experimental data.

Damage Identification in Beams Using Experimental Data

There are several techniques for non-destructive damage detection in structures. However, they are costly and require a very precise analysis of the extent of the structure. Numerical methods can help in nondestructive testing of structures, showing the possible location of the damage and thereby decreasing the area of analysis and constituting less expensive non-destructive tests. Outstanding among the numerical methods most used to detect damage are the finite element method and the boundary element method. This paper presents the application of wavelet transform for damage detection to the static response of a beam (profile I) simply supported with a point load. Damage simulation was achieved using saw cuts in the top and bottom flanges of the beam.