# Damage Analysis and Evaluation of Light Steel Structures Exposed to Wind Hazards
## 2 Cladding
As to research on the fatigue problem of cladding-fastener connections, [PERSON] and [PERSON] [18] and [PERSON] and [PERSON] [19] first investigated the possibility of wind-induced fatigue damage to screw-fastened light-gauge-steel roofing sheets. They conducted a series of fatigue tests in laboratories and concluded that fatigue failure in the vicinity of fasteners is the only possible cause of the severe roofing damage during Cyclone Tracy. The research conducted by [PERSON] and [PERSON] [20] also highlighted the importance of wind-induced fatigue damage to metal buildings. [PERSON] [21; 22; 23; 24] performed a large number of fatigue tests on the arctangent type of roofing sheets with different spans and fastening systems under constant amplitude repeated loads. The tests were conducted by controlling the total fastener reaction force at the central support. [PERSON] and [PERSON] [25] carried out some tests on the trapezoidal type of sheets and made reports on tests with similar objectives for cladding with the trapezoidal cross section. [PERSON] [26; 27] carried out tests on three types of metallic plates commonly used in Australia to evaluate the effect of cyclic loads of constant amplitude and loads that simulated the lifting of the roof due to negative pressures exerted by the wind. It is shown in this research that the fatigue behavior of the joints was related to the wind-induced local plastic deformation (LPD) [28] in the form of nuts below the node hole around the plate of local depression. Changes in the geometrical dimensions of the profiled steel plate (wave height, wave pitch, etc.) affect the LPD strength and fatigue properties of corrugated steel roof joints. The addition of wind-resistant gaskets at the joints increases the effective wind-resistant area beneath the nuts, delaying the occurrence and expansion of cracks and plastic deformation, and increasing the LPD strength of the joints. From the view of the initiation and propagation of fatigue cracks, [PERSON] [27] studied the constant-amplitude fatigue problem of the corrugated steel roof commonly used in Australia and found that the fatigue cracks growth pattern will be different under different cyclic loading levels. The fatigue test of [PERSON] [21] reflects the effect of cyclic load amplitude on the fatigue performance of the joint from the viewpoint of the number of pre-failure load cycles. The discreteness of this result is the interaction of material properties, nodal fixation degree, and node fixed position. [PERSON] et al. [7] described the mechanism underlying the fatigue behavior by studying the initiation of cracking in corrugated high strength steel cladding. In combination with detailed stress analysis, such criteria could be implemented in a numerical model to predict crack initiation in cladding. The model can provide an analytical tool that could greatly assist the fatigue design process and lead to a reduction in the total reliance on prototype testing of each system used. [PERSON] et al. [26; 27] studied the fatigue behavior of three types of profiled steel sheets, which are commonly used in Australia, using the double-slab model. They found that the plate type has an effect on the fatigue damage accumulation. The anti-fatigue ability of corrugated a steel roof is higher than that of a ribbed steel roof under low amplitude cyclic loading. The fatigue capacity of a ribbed steel roof is higher than that of a corrugated steel roof under high amplitude cyclic loading. [PERSON] [21; 22; 23; 24] studied the fatigue properties of the trapezoidal steel roof commonly used in Australia and found that the fatigue resistance of the trapezoidal steel roof is better than the corrugated steel roof. For the corrugated steel roof, the stiffness of the node was reduced and the fatigue crack propagation speed was accelerated by the large load cycle, which leads to premature fatigue failure.