Objectif
IN ORDER TO WITHSTAND THE COMPETITION OF OTHER MATERIALS, NEW DESIGNS ARE PRESENTED WHICH AVOID THE NEED TO USE COMPLICATED AND EXPENSIVE NODES.
INSTEAD OF THE TRADITIONAL TRUSS STRUCTURE A VERTICAL CYLINDER WITH A LARGE DIAMETER AND WALL THICKNESS WILL BE USED.
HOWEVER THE FATIGUE BEHAVIOUR OF THESE THICK PLATES HAS NOT YET BEEN INVESTIGATED.
AN ON-GOING REVIEW OF THE REQUIREMENTS OF THE CODES IS EXTREMELY IMPORTANT. IN THIS CONNECTION IT IS ADVISABLE TO INVESTIGATE THE EFFECT OF A ROOT DEFECT ON FATIGUE BEHAVIOUR, BECAUSE THESE DEFECTS ARE ALMOST UNAVOIDABLE IN ONE-SIDE WELDING AND THERE IS SOME DOUBT WHETHER ALL ROOT DEFECTS NEED TO BE REPAIRED.
BY AVOIDING THE NEED TO REPAIR THE WELDS MUCH TIME AND/OR MONEY CAN BE SAVED.
THE PROPOSED RESEARCH PROGRAMME DEALS WITH THE FOLLOWING ITEMS:
- FATIGUE BEHAVIOUR OF WELDED STEEL JOINTS IN OFFSHORE STRUCTURES.
THE FATIGUE BEHAVIOUR OF
1. A BUTT-WELDED THICK PLATE
2. A THICK PLATE WITH AN ATTACHMENT PERPENDICULAR TO THE MAIN STRESS DIRECTION
3. A THICK PLATE WITH AN ATTACHMENT PARALLEL WITH THE MAIN STRESS DIRECTION
4. ROOT DEFECTS IN A BUTT-WELDED TUBULAR CONNECTION
- FATIGUE LIFE ESTIMATION BASED ON A FRACTURE MECHANICS APPROACH ESPECIALLY FOR THE REGION OF LONGER FATIGUE LIVES.
Thème(s)
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2628 AL DELFT
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