Iterative coupling procedure applied to the transient response of dynamic soil-structure systems

• Published in: Latin American journal of solids and structures Vol. 17; no. 8
• Main Authors: Tovo, Otávio Augusto, Lima, Luis Filipe do Vale, Labaki, Josué, Damasceno, Daniela Andrade, Mesquita, Euclides
• Format: Journal Article
• Language: English
• Published: Associação Brasileira de Ciências Mecânicas 01.01.2020
• Subjects: ENGINEERING, CIVIL; ENGINEERING, MECHANICAL; MECHANICS; Dynamic soil structure interaction; time-domain iterative coupling procedure; viscoelastic soils; convolution integral
• ISSN: 1679-7817; 1679-7825; 1679-7825
• DOI: 10.1590/1679-78256046

Abstract This paper proposes a methodology to obtain the transient response of structural system interacting with soil-foundation schemes supported by viscoelastic soils. The structure and soil are divided into sub-systems. The time domain solution for each subsystem is formulated by an appropriated methodology. The equations of motion of structure are solved by Newmark integration algorithm. The transient response of the soil is obtained by a convolution integral. The convolution integral uses transient impulse response of viscoelastic soils. Newmark and convolution algorithms are formulated as input and output schemes, which, in turn, are plugged to the time stepping iterative algorithm. The scheme is applied to vertical response of a dynamical system interacting with a massless foundation laying on a soil modelled as a three-dimensional homogeneous viscoelastic half-space. For two distinct external forces, the resulting coupled displacements, interface forces, errors and number of iterations within each time step are provided.