Lecture

Nonlinear Kinematic Analysis: Mechanism Identification and SDOF Transformation

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CIVIL-522: Seismic engineering

This course deals with the main aspects of seismic design and assessment of buildings including conceptual design. It covers different structural design and evaluation philosophies for new and existing reinforced concrete, steel and unreinforced masonry bu ...

Description

This lecture covers the steps for nonlinear kinematic analysis, including the calculation of horizontal force and displacement capacities, identification of displacement capacities, and transformation into an equivalent SDOF. It also discusses the application of displacement-based approaches and the N2 method.

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Instructors (4)

Dimitrios Lignos

Prof. Lignos joined the École Polytechnique Féderale de Lausanne (EPFL) in 2016 from McGill University in Canada where he was a tenured Associate Professor and a William Dawson Scholar for Infrastructure Resilience. He holds a diploma (National Technical University of Athens, NTUA, 2003), M.S. (Stanford University, 2004) and Ph.D. (Stanford University, 2008). In addition, he was a post-doctoral scientist at Stanford University (2009) and in Kyoto University (2010). Prof. Lignos teaches graduate and undergraduate courses in seismic design, nonlinear behaviour of steel and composite structures as well as supplemental damping systems, Structural Stability, Nonlinear Analysis and Performance-based Earthquake Engineering. His awards for teaching, research and service in Civil Engineering include the 2011 Outstanding Teaching Award (Faculty of Engineering, McGill University), as well as the Outstanding reviewer (2012, 2013) award from ASCE, the 2013 State-of-the-Art in Civil Engineering Award by ASCE and the 2014 Christophe Pierre Award for Research Excellence - Early Career. Just recently, he received the 2019 Walter L. Huber Civil Engineering Research Prize from ASCE for significant contributions in developing state of the art methods to simulate extreme limit states in steel structures.Prof. Lignos is a member of ASCE and the Earthquake Engineering Research Institute. He acts as an Associate Editor for Metal Structures and Seismic Effects of the ASCE Journal of Structural Engineering. He joined the Editorial Board of Earthquake Spectra and Earthquake Engineering and Structural Dynamics International journals. He serves as an acting member of the CEN/TC 250/SC 8/WG 2 and has been selected as a member of the Project Team (PT2) for the Eurocode 8-Part 1 Current Revisions for Steel and Composite Structures. He is also a member of the Canadian Standards Association (CSA) S16 technical committee for Steel Structures. Prof. Lignos is involved as a NEHRP consultant in numerous research-to-practice projects related to the behaviour and nonlinear modelling and analysis of structures applicable to the engineering practice through the Applied Technology Council (ATC). Detailed Curriculum Vitae (last update September 2018)

Savvas Saloustros

Education PhD | Construction Engineering 2017 – 2017 UPC-BarcelonaTech, Spain MSc | Structural Analysis of Monuments and Historical Constructions (SAHC) 2013 – 2013 University of Padova, Italy & UPC-BarcelonaTech, Spain Diploma | Civil Engineering 2012 – 2012 National Technical University of Athens, Greece Professionals experiences Co-founder & Board Member 2019–2019 FENECStructural Engineer 2019–2019 Windmill Structural Constultants, Barcel

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Related concepts (32)

Identification (psychoanalysis)

Identification is a psychological process whereby the individual assimilates an aspect, property, or attribute of the other and is transformed wholly or partially by the model that other provides. It is by means of a series of identifications that the personality is constituted and specified. The roots of the concept can be found in Freud's writings. The three most prominent concepts of identification as described by Freud are: primary identification, narcissistic (secondary) identification and partial (secondary) identification.

Defence mechanism

In psychoanalytic theory, a defence mechanism (American English: defense mechanism) is an unconscious psychological operation that functions to protect a person from anxiety-producing thoughts and feelings related to internal conflicts and outer stressors. Defence mechanisms (Abwehrmechanismen) are unconscious psychological processes employed to defend against feelings of anxiety and unacceptable impulses at the level of consciousness.

Projective identification

Projective identification is a term introduced by Melanie Klein and then widely adopted in psychoanalytic psychotherapy. Projective identification may be used as a type of defense, a means of communicating, a primitive form of relationship, or a route to psychological change; used for ridding the self of unwanted parts or for controlling the other's body and mind.

Kinematic pair

In classical mechanics, a kinematic pair is a connection between two physical objects that imposes constraints on their relative movement (kinematics). German engineer Franz Reuleaux introduced the kinematic pair as a new approach to the study of machines that provided an advance over the motion of elements consisting of simple machines. Kinematics is the branch of classical mechanics which describes the motion of points, bodies (objects) and systems of bodies (groups of objects) without consideration of the causes of motion.

Kinematic chain

In mechanical engineering, a kinematic chain is an assembly of rigid bodies connected by joints to provide constrained motion that is the mathematical model for a mechanical system. As the word chain suggests, the rigid bodies, or links, are constrained by their connections to other links. An example is the simple open chain formed by links connected in series, like the usual chain, which is the kinematic model for a typical robot manipulator. Mathematical models of the connections, or joints, between two links are termed kinematic pairs.

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