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Life Extension of Structures (BYG570)

The course will provide an introduction to structural safety, in-service integrity management of structures and assessment of structures for life extension. The course will include topics such as the partial factor method, structural reliability theory, how structures age, inspection of structures, strength analysis of damaged and degraded structures and repair methods for structures. The course is related to structures in general, but with emphasis on offshore structures.


Course description for study year 2022-2023. Please note that changes may occur.

Facts
Course code

BYG570

Version

1

Credits (ECTS)

5

Semester tution start

Autumn

Number of semesters

1

Exam semester

Autumn

Language of instruction

English

Content

Part I: Safety of structures. Introduction to the principles of safety of structures as defined in standards such as ISO 2394 and EN 1990, and the historical development of principles of safety of structures. Introduction to structural reliability analysis (FOSM, FORM and Monte Carlo simulations). Use of structural reliability analysis of structures for calibration of safety factors, updating based on new information and planning of inspections.

Part II: Challenges related to life extension of aging structures, degradation of different materials and  structural types, historical development of standards used for design of offshore structures, causes of structural failure, methods for safety assessment of structures.

Assessment of structures for life extension: analysis used in assessment of structures for life extension including strength calculation of damaged and deteriorated structures  and fatigue analysis of existing structures.

Ensuring Structural Integrity in operation: Maintenance and monitoring of structures in operation and life extension, inspection planning, data management, integrity assessments in operation.

Learning outcome
After taking this course, students should:
  • Be able to understand and perform different types of safety assessments of structures
  • Be able to calculate characteristic loads, load effects and strength of structures
  • Understand the factors that can limit the life of structures
  • Be able to undertake strength analysis of deteriorated structures
  • Be able to perform fatigue analysis of existing structures
  • Know the principles of managing the integrity of structures in operation and in life extension, including inspection planning and general principles on repair of deteriorated and damaged structures.
Required prerequisite knowledge
None
Recommended prerequisites
Bachelor's Degree in Structural or Mechanical Engineering. 
Exam

Oral exam and exercice

Form of assessment Weight Duration Marks Aid
Oral exam 1/5 15 Minutes Letter grades
Individual exercise 4/5 Letter grades

The course has a continous assessment. All parts must be passed to achieve a final grade. There is no re-sit possibilities for the Individual exercise. Students that wish to improve their result on this part, may do so the next time the course is lectured.

Course teacher(s)
Course coordinator: Gerhard Ersdal
Course teacher: Gerhard Ersdal
Head of Department: Tor Henning Hemmingsen
Method of work
4 hours lecture per week, inclusive exercises and supervision, assignment prior to graduation.
Overlapping courses
Course Reduction (SP)
Life Extension of Structures (OFF620_1) 5
Open for
Structural and Mechanical Engineering, Master of Science Degree Programme Industrial Asset Management - Master's Degree Programme Marine and Offshore Technology, Master of Science Degree Programme Offshore Technology - Master's Degree Programme Exchange programme at Faculty of Science and Technology
Literature
The syllabus can be found in Leganto