| With the wide application and development of steel structure, the clod-formed steel praised highly effective and economic steel is widely used in the light-gauge steel building especially because of many advantages such as the good cross-section mechanical capability,the high steel using rate,the more convenient operation,the facilitating node connection and so on. The development of the cold-formed steel makes research domain interest in a series of theoretical problem about it. The research of web perforation members' load capacity is among these. On the basis of a lot of references, the thesis makes experiment and ANSYS analysis to study and analyze the structural behavior and the ultimate load capacity of web perforation members.The tests of the cold-formed C-shape member with one opening in web were made and the tests of non-perforated members were participated in directly subjected to axial compression to find influence of opening in the load capacity, including the change in buckling behavior and the effects on ultimate load capacity. The non-perforated members with same length will be overall distortional buckling and local buckling behavior. The paper presents the reason of difference in behavior of these two kinds of members through the comparison with test and ANSYS analysis; In the next place, the both non-linearity finite element analysis software of ANSYS are made on the basis of the test and validate the reliability of ANSYS analysis through the load-displacement curve and the structure destructive behavior. At last, the parameters analysis is made to two kinds of member with web perforation. The analysis includes the effects of opening width ( rate),height,the rate of height-width,opening shape and ratio of width-thickness on the ultimate load capacity.
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