Development of Simulation Techniques for Dynamic Soil-Structure Interaction Applied to Modeling of the Foundation Response of Nano-Facilities and Synchrotron Light Laboratories

• Grant number: 12/17948-4
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: November 01, 2012
• End date: November 09, 2016
• Field of knowledge: Engineering - Mechanical Engineering - Mechanics of Solids
• Principal Investigator: Euclides de Mesquita Neto
• Grantee: Josué Labaki Silva
• Host Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated scholarship(s): 15/00209-2 - Development of simulation techniques for dynamic soil-structure interaction applied to the modeling of the foundation response of Nano-Facilities and synchrotron light laboratories, phase 2, BE.EP.PD 13/23085-1 - Development of simulation techniques for dynamic soil-structure interaction applied to modeling of the foundation response of Nano-Facilities and synchrotron light laboratories, BE.EP.PD

Abstract

The present research plan addresses the development of a series of simulation techniques to describe the dynamic response of circular or annular foundations interacting with distinct soil profiles. The research plan is motivated by the necessity to model and understand the dynamic behavior of annular foundations of the kind that are being designed for the new Brazilian Synchrotron Light Source, the Sirius Project (Sirius, 2010). The limits of vibrations amplitudes required for the proper operation of the synchrotron light rings are very demanding and a proper understanding of the underlying foundation dynamics is fundamental to the success of the project. This project is built on the previous experience of the supervisor's research group as well as on the PhD research work recently presented by the post-doctoral candidate, Josué Labaki (Labaki, 2012). During his PhD thesis, Labaki developed a series of solutions to describe the interaction of circular or annular, rigid and flexible plates embedded in anisotropic homogeneous or layered soil profiles. Labaki's work must be extended in order to create a series of simulation tools which will be applied to model the dynamic interaction of the soil with the foundation model that is being designed for the Sirius Light Source. The most accurate soil models represent the soil as an unbounded domain, subjected to Sommerfeld's Radiation Condition (SRC) (Sommerfeld, 1949). The SRC states that waves or energy emanated from the excitation source are radiated into infinity and not reflected. Standard numerical methods, such as the Finite Element Method (FEM), have limitations in fulfilling Sommerfeld's Radiation Condition. Special techniques are required for an accurate description of dynamic soil-structure interaction problems. These techniques are based on specific Green's functions that take into account the SRC and are usually incorporated in the Boundary Element Method (BEM). The Green's functions developed in Labaki's thesis (Labaki, 2012) fulfill the radiation condition and are very suitable to model the response of circular and annular foundations. Besides the development of the mathematical and engineering tools to model the Sirius foundation response, the present research plan foresees a scientific exchange with an international scholar from the Simon Fraser University, Canada, Prof. Nimal Rajapakse. The development of the present post-doctoral research work will be partially accomplished during a stay of the candidate, Josué Labaki, at the Simon Fraser University. This international collaboration will contribute to improving the quality of the present research as well as strengthen the capabilities of the Brazilian research group in which the present post-doctoral project will be developed.

Scientific publications

(5)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

LABAKI, J.; MESQUITA, E.; RAJAPAKSE, R. K. N. D.. Vertical Vibrations of an Elastic Foundation with Arbitrary Embedment within a Transversely Isotropic, Layered Soil. CMES-COMPUTER MODELING IN ENGINEERING & SCIENCES, v. 103, n. 5, p. 281-313, DEC 2014. (12/17948-4, 13/23085-1, 13/08293-7)

LABAKI, J.; MESQUITA, E.; RAJAPAKSE, R. K. N. D.. Coupled horizontal and rocking vibrations of a rigid circular plate on a transversely isotropic bi-material interface. Engineering Analysis with Boundary Elements, v. 37, n. 11, p. 1367-1377, NOV 2013. (12/17948-4)

LUIS FILIPE DO VALE LIMA; JOSUE LABAKI; EUCLIDES MESQUITA. STATIONARY DYNAMIC RESPONSE OF A CIRCULAR RIGID FOUNDATION PARTIALLY SUPPORTED BY A FLEXIBLE PILE AND INTERACTING WITH A HALF-SPACE. LATIN AMERICAN JOURNAL OF SOLIDS AND STRUCTURES, v. 17, n. 8, 2020-11-09. (13/08293-7, 12/17948-4, 17/01450-0)

DAMASCENO, D. A.; MESQUITA, E.; RAJAPAKSE, R. K. N. D.; PAVANELLO, R.. Atomic-scale finite element modelling of mechanical behaviour of graphene nanoribbons. INTERNATIONAL JOURNAL OF MECHANICS AND MATERIALS IN DESIGN, v. 15, n. 1, p. 145-157, MAR 2019. (12/17948-4, 15/00209-2, 13/08293-7, 13/23085-1)

DAMASCENO, D. A.; MESQUITA, E.; RAJAPAKSE, R. N. K. D.. Mechanical Behavior of Nano Structures Using Atomic-Scale Finite Element Method (AFEM). LATIN AMERICAN JOURNAL OF SOLIDS AND STRUCTURES, v. 14, n. 11, p. 2046-2066, 2017. (15/00209-2, 12/17948-4, 13/08293-7, 13/23085-1)