Vibrations of shallow shells due to removal of formwork

LUIS A. GODOY; VICENTE SOUZA

JOURNAL OF SOUND AND VIBRATION

ACADEMIC PRESS LTD-ELSEVIER SCIENCE LTD

Lugar: Oxford; Año: 1998 vol. 215 p. 425 - 437

0022-460X

This paper is about the forced vibrations of thin-walled shallow shells having rectangular planform and constant thickness and curvature. Assumptions of linear behavior in both material and kinematic properties of the system are assumed, and an analytical solution is obtained for natural frequencies and mode shapes. The forced vibrations of the shell are computed using the modal superposition approach. The formulation is applied to solve the transient response of a reinforced concrete shallow shell due to removal of the formwork. The influence of structural defects is included in an approximate way to estimate forced vibrations in a deteriorated shell. Parametric studies indicate the influence of the main parameters affecting the behavior or the shell.