Research On Load Carrying Capacity Of A New Type Of Light Gauge Steel System Square Studs

The new type of light gauge steel system is a new structural, which is mainly used in low-rise houses. Light gauge steel houses are broadly used in foreign countries, however, in our country, it's just beginning. At present, the new type of light gauge steel system studs are mainly constituted of H- profiles, C- profiles and tubes. In this paper, the studs constituted of tubes and clips are talked aboutThe new type of light gauge steel system studs are divided into 2 parts: the single-piece studs and the square studs. The square studs are mostly used in the corners and structures that carrying concentrated forces. In this paper, finite element researches and formula analyses are done on basis of the static tests of the new type of light gauge steel system studs. The following contents are involved:First, in order to understand the load-bearing capacity of new type of light gauge steel system studs, 5 full-size static tests were carried out, and researches were done on it. The process, results and cautions are introduced in this paper.Second, according to the results of the static tests, the wrecking mode of new type of light gauge steel system studs is bend-buckling. The theory of built-up member under pressure is used in calculating the ultimate load carrying capacity of the 5 samples. The calculating results match the test result, which shows it's appropriate to describe the new type of light gauge steel system studs as built-up studs, and it's feasible to calculate the ultimate load carrying capacity using the theory of built-up member under pressure.Third, the 5 samples are simulated using the finite element software ANSYS. The ultimate load carrying capacity and wrecking situations of the new type of light gauge steel system studs are reviewed. According to the comparing of ultimate load carrying capacity in finite element analysis, calculating and static tests, the results are matched, which shows that, it's feasible to simulate the new type of light gauge steel system studs under press using finite element analysis.At last, basis on the needs of designing, the ultimate load carrying capacities of different type of the new type of light gauge steel system studs are list on a table as a reference. The data shows that the space between clips doesn't strongly affect the load carrying capacity;while the bigger thickness of tube conduces to a better load carrying capacity.