Fatigue Behavior of Welded Aluminum Light Poles - Menzemer

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Objectives • Brief, historical perspective on aluminum fatigue design provisions • Existing fatigue data for welded aluminum light pole support details • Review research program sponsored by HAPCO at The University of Akron • Fatigue test results from HAPCO research program • Parametric studies and fracture mechanics evaluation • Age old questions – how much, how long, are you sure….. • Design recommendations
Historical Perspective • 1986 First fatigue design specification published by the Aluminum Association i in the U.S. • 1986 Specification based on primarily small scale fatigue specimens • Prior to the mid 1970’s, most fatigue data held by private and government laboratories • Effort started in the 1970’s to develop a fatigue data bank. Collaborative effort started with European colleagues. • Full – scale welded aluminum specimens evaluated during the 1980’s in Europe and the U.S. • Data sharing and extensive analysis resulted in current Aluminum Association and ECCS fatigue design specifications • Current provisions utilize stress range and detail type as the primary variables that determine fatigue life for welded aluminum structures.
Page 1: Fatigue Behavior of Welded Aluminum
Page 5 and 6: Fatigue Test Results ATLSS Fatigue
Page 7 and 8: Project Components 35 Stress (ksi)
Page 9 and 10: Fatigue- Test Results Shoe base Str
Page 11 and 12: Butterfly Trend Gage 2 Gage 3 ang e
Page 13 and 14: Suggested Specification Provision

Fatigue Behavior of Welded Aluminum Light Poles - Menzemer

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