Dinâmica Estrutural e Engenharia Sísmica

Objectives

Compute the response of structural systems when subjected to dynamic actions. Focus on growingly complex problems, in terms of the number of degrees-of- freedom and in terms of the nature of the time-varying actions. Single and multi degree-of freedom systems response, subjected to time-varying actions (applied forces or base motion input). Performance-based checks, both in structural and non-structural effects. Earthquake-resistant layout and design of structures (based on modal response spectrum analysis), expressed in applicable codes of practice. Understanding of the foundations of seismology and earthquake hazard.

Syllabus

1. Introduction to Structural Dynamics 1.1 Static vs dynamic actions. Types of dynamic actions 2 . Dynamics of single degree of freedom systems 2.1 Equation of motion 2.2 Free and forced vibrations 2.3. Response to general dynamic loading using Duhamel Integral 2.4 Response to ground motion. Response spectrum 3. Dynamics of multi degree of freedom systems 3.1 Frequency analysis by the Rayleigh method 3.2 Equation of motion for multi degree of freedom systems 3.3 Calculation of frequencies and vibration modes shapes 3.4 Modal analysis by response spectrum. 3.5 Dynamic analysis by time step integration. 4 Seismic design and analysis (Eurocode 8 and the Portuguese National Annex). 5. Concepts of seismicity and seismic risk.

Prerequisites

Analysis of Structures

Cross Competence Component

Interpersonal and Intrapersonal Skills: oral, organizational and teamwork, self-discipline, perseverance, self-motivation skills - within the Group Work. Information and Media Literacy - Use of IT tools, information searching and management, structuring and formatiing reports and presentions, within the Group Work. The assessment percentage associated with these competences should be 10%.

Ethical Principles

All members of a group are responsible for the group's work. In any assessment, every students shall honestly disclose any help received and sources used. In an oral assessment, every students shall be able to present and answer questions about the entire assignment and solution.