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FATIGUE FAILURE OF STEEL SPACE TRUSS SYSTEMS FROM SNOW LOADS
Abstract
Space truss systems are formed by steel bars which are under axial tension or compression loads connected each other with nodes. These systems provide constructing wide span structures by light structural elements and also make buildings more powerful and useful. Space truss system elements must be dimensioned due to the loads they carry as dead, live, wind and earthquake loads. In this paper; fatigue damage of a steel space truss system is studied under snow and thermal loads. Results are compared to four space truss systems which are collapsed from snow loads and it is seen that collapsing mechanism of these space truss systems and calculation results match. And also it is observed that; corrosion and structural irregularities are effective in failure of these systems. Precautions are given for preventing fatigue failure of space truss systems. In this study it is seen that; fatigue failure is an important problem which must be considered in all conditions.
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References9
http://www.db.bauzeitung.de/sixcms/media.php/273/db1004_mengering.pdf
ASM Handbook, Volume 19, Fatigue and Fracture Section, 2007
Wei Lu Pentti Mäkeläinen, Advanced Steel Structures, Helsinki University of Technology Department of Civil and Environmental Engineering Laboratory of Steel Structures, 2003
Ahmet TOPÇU, Snow Load and Collopsed Roofs, Eskişehir Osmangazi University [email protected]
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E. Bardal, J. M. Drugli , Corrosion Detection and Diagnosis Materials Science And Engineering –Norwegian University of Science and Technology, Norway SINTEF Materials Technology, Norway
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Joseph Lee Evins Dependence Of Strength On Corrosion-Fatigue Resistance Of Aisi 4130 Steel Georgia Institute of Technology April 2004
Guagliano, M., Riva, E., Guidetti, M., “Contact Fatigue Failure Analysis of Shot-Peened Gears”, Engineering Failure Analysis, 9, 147-158 2002.
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