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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 2021-2022. Please note that changes may occur.

Course code


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Offered by

Faculty of Science and Technology, Department of Mechanical and Structural Engineering and Materials Science

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.

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). Introduction to simplified risk analysis  of structures. 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.

Required prerequisite knowledge

Written exam and exercice

Form of assessment Weight Duration Marks Aid
Written exam 60/100 3 Hours A - F
Individual exercice 40/100 A - F

Written exam and individual exercice. Both must be passed to obtain a final grade.If a student fails the assignment, he / she must repeat this the next time the course is taught. There will not be created an re-sit exam the assignment that is completed during the semester. Only written exam there can be re-sit exam.

Course teacher(s)
Course coordinator: Gerhard Ersdal
Course teacher: Gerhard Ersdal
Course coordinator: Gerhard Ersdal
Head of Department: Tor Henning Hemmingsen
Method of work
4 hours lecture per week, exercises, assignment prior to graduation.
Open for
Engineering Structures and Materials - Master's Degree Programme Industrial Asset Management - Master's Degree Programme Marine- and Offshore Technology - Master's Degree Programme Offshore Technology - Master's Degree Programme
Overlapping courses
Course Reduction (SP)
Life Extension of Structures (OFF620) 5
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