| Summary: | 碩士 === 朝陽科技大學 === 營建工程系碩士班 === 98 === This research is concentrated on the cold-formed steel wall frame sheathed with calcium silicate board under cyclic loads. Two different thicknesses of sheathing, 9 mm and 12 mm, and two types of shear load, monotonic and cyclic loading conditions, were used in the experimental study. The ultimate strength, ductility ratio, energy absorption, stiffness dissipation, overstrength factor (Ω), response modification factor (R), and failure mode for each individual specimen were discussed in this study. In addition, the material properties, such as elastic modulus of steel, as well as elastic modulus and shear modulus of calcium silicate board were also investigated in order to provide relative parameters for the analysis of wall strength.
It was observed that most specimens reached the ultimate until the bottom track was pulled out from anchor bolts due to the uplift force during the test. For the specimens under the monotonic shear load, the ultimate strength, stiffness, and R value of the wall specimens with double end studs are much greater than those with only one single end stud. It is also found from the tests that the specimen sheathed with thicker board has higher ultimate strength. The overstrength factor of 1.5 and response modification factor of 2.5 were proposed for the cold-formed steel wall sheathed with calcium silicate board.
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