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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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