Experimental seismic mechanics

Course Information
TitleΠειραματική σεισμική μηχανική / Experimental seismic mechanics
SchoolCivil Engineering
Cycle / Level2nd / Postgraduate
Teaching PeriodWinter
Course ID600020573

Programme of Study: Aeifóros Schediasmós Technikṓn Érgōn Énanti Seismoý kai Állōn Fysikṓn kindýnōn

Registered students: 14
OrientationAttendance TypeSemesterYearECTS
KORMOSCompulsory Course115

Class Information
Academic Year2023 – 2024
Class PeriodWinter
Faculty Instructors
Weekly Hours1
Class ID
Course Type 2021
Specialization / Direction
Course Type 2016-2020
  • Scientific Area
Mode of Delivery
  • Face to face
  • Distance learning
Digital Course Content
Language of Instruction
  • Greek (Instruction, Examination)
General Prerequisites
- Compulsory attendance of all courses and in particular the corresponding workshops. - During the workshops, equipment is required to take photographs to be included in the final report (theme) - Theme development - Written and oral examinations.
Learning Outcomes
Purpose: To study the dynamic response and seismic behaviour of structural systems through laboratory measurements and on-site observations. Study of the dynamic and seismic behaviour of materials, simple structural elements and structural systems under laboratory and on-site stresses. Comparison of measurements of dynamic and seismic response of structural systems with results of corresponding numerical simulations. Study of limit states and failure modes of simple structural elements in their initial state or after repair, when these elements are subjected to simple or complex loadings. Interpretation of the observed behaviour and its correlation with the applied load on the one hand and failure criteria on the other hand. Connection of the above with failure modes observed in prototype structural systems after strong seismic excitations, Experimental and numerical investigation of the behaviour of repaired simple structural elements with typical failures in the laboratory. Investigation of means to reduce seismic response (Insulators - dampers - energy absorption devices) and comparison of measured behaviour with predictions from corresponding numerical simulations. Objectives: Upon successful completion of the course, the graduate student should: A) Through the study of the laboratory or on-site behaviour of materials, simple structural elements and structural systems on the one hand to establish the most decisive principles that dictate decisions for the repair-reinforcement of structural elements against a strong seismic stress on the other hand to understand the possibility of using experimental methods in combination with appropriate numerical simulations. B) Through the study of the dynamic or seismic response of simple structural systems, either on-site or in the laboratory using realistic physical simulations and the numerical simulation of this response, to understand in depth the phenomena that determine the successful study of the dynamic or seismic response of structural systems. In addition, to be able to investigate various ways to reduce the seismic response and either successfully implement the design and construction of the corresponding structural systems or to verify on-site, if required, their realised behaviour. In addition, through the application of appropriate numerical simulations, to be able to understand the scope, limitations and relative difficulty of successfully applying the relevant numerical simulations with applications either to realistic physical models to be studied in the laboratory or to prototype structural systems on-site.
General Competences
  • Apply knowledge in practice
  • Retrieve, analyse and synthesise data and information, with the use of necessary technologies
  • Make decisions
  • Work in teams
  • Generate new research ideas
  • Design and manage projects
  • Be critical and self-critical
  • Advance free, creative and causative thinking
Course Content (Syllabus)
1. Experimental study of seismic behaviour of structural systems - Physical models. . The nature of seismic loading . Laboratory arrangements for approximation of seismic action . - Loading arrangements - Strong floors, reaction frames, Artificial earthquake arrangements, test fields for in situ measurements and instrumentation schemes of real structures. . Instrumentation of experimental arrangements. Sensors and measurements of acceleration, displacement, load response. Recording, storage and processing of measurements. 2. Utilization of experimental methods in Dynamic and Seismic Engineering of Structures. Monitoring of structural health. - Analysis of dynamic signals in the time and frequency domain (Fourier Spectra - Response Spectra) - Idiomorphic analysis - experimental methods. Determination of damping rate. - On-site measurements (e.g. buildings, bridges, wind turbines, etc.) - Laboratory applications in simple dynamic systems. - Soil - foundation - superstructure interactions - Laboratory applications and numerical simulation. 3. Composite loading devices for dynamic or seismic loads - Simulation of seismic excitations - Seismic Bank. . Simulation of dynamic or seismic signals - White noise, sinusoidal or seismic excitations. - Laboratory study of dynamic response of single or two-stage simple systems in the laboratory through free oscillation or forced sine wave base excitation conditions. Influence of variation of stiffness and mass as well as support conditions. Comparison of measured response quantities with the corresponding results from numerical simulations. 4. Materials for the repair of structural elements damaged by seismic loads. - Forms of damage to structural elements and structures from seismic actions. - Failure scenarios. The logic of the weak link. - Characterisation of failures and ways of repairing structural elements damaged by seismic actions. . The affinity of reinforcement and concrete and ways to improve it. Welding of reinforcement. - Epoxy resins, special concretes, fibre-reinforced polymers. - Laboratory tests using simple experimental set-ups and laboratory applications 5. Behaviour of simple structural elements in their original form and after repair . The mechanism of tightening. - Improvement of the tightening mechanism by means of fibre-reinforced polymer sleeves. - Unreinforced and buckled masonry. . Compressive behaviour of specimens in the laboratory (initial condition). - Compressive behaviour of specimens in the laboratory after sheathing. - Comparison of experimental results with predictions by computational methods. 6. Mechanisms of force transfer in repaired structural elements. - Bolt mechanism and anchor mechanism. - Relevant provisions of the CCEPE. - Repair of frames with emphases. Wall fillings. 7. Behaviour of simple structural elements before and after repair. - Behaviour of an amphibious beam in bending/shearing in the laboratory (initial condition). Failure modes and repair/reinforcement methods. Behaviour of the same structural element after repair/reinforcement - The problem of repair/reinforcement of a slab in shear . Investigation of the anchoring mechanism of repair/reinforcement parts with fibre-reinforced polymers. - Comparison of experimental results with predictions by computational methods. 8. Non-destructive methods and their use in evaluating the behaviour of simple structural elements or connections in their original form and after repair. - In-situ measurements and application of sampling. - Laboratory applications - Repair of structural elements with sheathing. - Construction details. -Calculation methods - Simplifying software - Applications in building construction. 9. Comparison of experimental response from laboratory or on-site measurements with numerical simulation results on simple or complex structural systems in the laboratory or on-site - Soil - foundation - superstructure interactions . Physical simulation of frame structure and interaction with wall fill. Physical dummy of bridge deck on seismic bench on dummy reservoirs. Physical dummy of bridge pylon under scale with very stiff or relatively flexible bearing conditions. Numerical simulation of the behaviour. 10. Interventions in load-bearing systems to reduce seismic response - Passive Seismic Insulation - Dampers - Seismic energy absorption devices and structural components Bridges and applications to reduce seismic response Experimental study of the behaviour of instruments for seismic response reduction (Insulators - Dampers - Seismic energy absorbing devices and structural components). Regulatory provisions. 11. Interventions in load-bearing systems to reduce seismic response - Passive Seismic Insulation - Dampers - Energy absorption devices - Numerical simulation of behaviour.
Educational Material Types
  • Notes
  • Slide presentations
  • Video lectures
  • Audio
  • Multimedia
Use of Information and Communication Technologies
Use of ICT
  • Use of ICT in Course Teaching
  • Use of ICT in Laboratory Teaching
  • Use of ICT in Communication with Students
  • Use of ICT in Student Assessment
Course Organization
Laboratory Work401.3
Student Assessment
Student Assessment methods
  • Written Exam with Short Answer Questions (Formative, Summative)
  • Written Exam with Extended Answer Questions (Formative, Summative)
  • Oral Exams (Formative, Summative)
  • Report (Formative, Summative)
  • Labortatory Assignment (Formative, Summative)
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