The Study Of The Stressed Skin Diaphragm In Light Gauge Steel Structure

Currently, pressed-steel plates are still used as exterior-protected constructions of the roofing and wall surface of buildings in the designing of light steel structures, without considering of their structure function. While, in fact, the sheets can work together with the structures if proper connections are made between the corrugated steel sheets and surrounding members, which will increase the strength and stiffness of the whole structure. Considering the influence of stressed skin diaphragm can help the model more accord with the condition of practical structure, which also produces considerable economic advantage. So it is significant and practical to develop the effect of stressed diaphragm in the light steel structures.This paper adopts numerical model to simulate the stressed skin diaphragm with ANSYS, a finite element software, based on the results of exist experiments, and the failure mechanism and working behaviors of the stressed skin diaphragm are intensive studied. Meanwhile, based on abundant results of numerical calculation, the influence factors and influencing mechanics of stressed skin diaphragm are discussed from three aspects: members,fasteners and corrugated steel sheets. The result show that the mechanical property and the arrangement of the fasteners have the greatest influence on the structures, and the influence of other factors can be realized only by the fastenings. With reasonable assumptions, this paper derives the formula of the optimum distance of three types of the fasteners, and effectiveness of the formula is verified by compared with the simulation results.Finally, the mechanical property and the distribution of internal forces of the diaphragms with openings are studied, and the influence of the area, the arrangement and the border members of openings on the diaphragms are also researched.Some important conclusions are arrived through numerical simulation in this paper, which can provide valuable references for the designing of the stressed skin diaphragm in the practical engineering.