Strain-Based Structural Health Monitoring of Civil Structures

Docente: Prof. Dr Branko Glisic

Descrizione:

Needs for optimization of maintenance costs, increase of safety, and continuous developments of new construction materials and methods, as well as recent technological developments in various areas of science and engineering, all led to creation of new interdisciplinary branch of engineering – Structural Health Monitoring (SHM). Strain is one of the most frequently monitored parameters in civil SHM applications due to multiple reasons: strain is directly related to stress and deflection, which reflect structural performance, safety, and serviceability; and strain field anomalies are frequently indicators of unusual structural behaviors (e.g., damage or deterioration). This course introduces the topics of strain-based SHM with basic definitions of measurement and monitoring, monitoring activities and entities, and with various available and emerging strain monitoring technologies. The fundamental criteria for applications on concrete and steel are elaborated, and basics on data interpretation and analysis are presented. Finally, methods applicable to large spectrum of civil structures, such as bridges, buildings, geo-structures, and large structures are developed. Each lecture of the course is illustrated with examples taken from the practice. A fair knowledge in Construction Materials, Structural Analysis, and Engineering Mathematics is expected from participants.

(brochure)

Programma del corso (5 CFU, 30 ore):

Day 1, July 11: 9:30-13:30 + 14:30-16:30 AULA 3 (and Teams platform for those who are not in Perugia)

  1. Introduction to structural health monitoring: basic notions, needs, benefits; smart structures
  2. Structural health monitoring process: core activities and entities (actors); example
  3. Monitoring systems: components; requirements and available technologies; specifications

Day 2, July 12: 9:30-13:30 + 14:30-16:30 AULA 3 (and Teams platform for those who are not in Perugia)

  1. Electrical strain sensors: strain‐gauges, vibrating wires, piezoelectric sensors
  2. Fiber optic strain sensors: EFPI, SOFO, FBG, and Intensity based discrete sensors, and distributed sensors
  3. 06 Basics on error analysis: uncertainty and error, rounding and significant figures, error propagation, outliers, missing data

Day 3, July 13: 9:30-13:30 + 14:30-16:30 AULA 3 (and Teams platform for those who are not in Perugia)

  1. Influence of gauge length: sensor gage‐length and measurement; short‐gage vs. long‐gage sensors; determination of gage‐length limits; distributed sensors
  2. Strain components: strain components and strain time evolution; elastic and plastic strain; thermal strain, creep, and shrinkage
  3. Strain analysis example: high-rise building
  4. Analysis of monitoring results: sources of errors; determination of strain components and stress from strain measurement; detection of anomalies

Day 4, July 14: 9:30-13:30 + 14:30-16:30 AULA 3 (and Teams platform for those who are not in Perugia)

  1. Global and integrity monitoring (1): introduction to global monitoring concept; simple topology
  2. Global and integrity monitoring (2): parallel topology
  3. Global and integrity monitoring (3): crossed and triangular topologies

Day 5, July 15: 9:30-13:30 + 14:30-16:30 AULA 3 (and Teams platform for those who are not in Perugia)

  1. Global and integrity monitoring (4): monitoring of pile foundations; monitoring of buildings; monitoring of heritage structures
  2. Global and integrity monitoring (5): monitoring of bridges – simple beam, continuous girder, arch, cable stayed, and suspension bridge
  3. Global and integrity monitoring (6): integrity monitoring
  4. Example of global and integrity monitoring: Streicker Bridge

Virtual room [link]