Abstract
This paper introduces a procedure for estimating wind-induced fatigue damage to metal roof cladding. Fatigue loading on roof cladding is determined using a rainflow count method and considering long-term wind climate. Linear or bilinear S-N curves on a log-log plot are derived based on fatigue tests of three types of commonly used light gauge steel roofing sheets. Fatigue damage indexes are calculated by a modified Miner's rule. Roof pressures measured on a low-rise building at Wind Engineering Research Field Laboratory of Texas Tech University (TTU Building) are used to carry out a comparison of fatigue damage caused by the new fatigue loading found in this study with that caused by the fatigue loading currently used in Australia and Europe with respect to design life of roofing sheets, wind return period, annual occurrence of cyclone, and others. The limit fatigue load-bearing capacity of roofing sheets is also obtained.
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