Study On The Stressed Skin Effect Of Phosphogypsum Board In Light-gauge Steel Structure

Phosphogypsum is a phosphorus chemical enterprises in the use of phosphate rock and sulfuric acid reaction to produce phosphoric acid produced,which is the main component of OHCaSO24?2.China's annual output of tens of millions of tons of phosphogypsum,and 10% annual growth rate,but the utilization rate is less than20%.Phosphogypsum takes up a lot of land resources and some of the harmful chemicals in the phosphogypsum penetrate into the soil to destroy the soil's corrosive capacity.Phosphogypsum can produce high-strength semi-water gypsum that has a strong adhesion which can be used to make the building materials used in the brick or plate.It is not only reduced the natural gypsum Consumption,but also deal with the already deposited mountains of phosphogypsum.In order to obtain the optimal incorporation ratio of lime,fly ash and slag powder,fly ash and slag powder was determined by changing the proportion of lime.the compressive strength of the tested phosphogypsum block were applied to the nonlinear finite element model of light steel wall,and study the stressed skin effect of phosphogypsum board in light steel structure.In the study of the stressed skin effect of light steel structure,this paper mainly studies the stressed skin effect of cold-formed steel residential building.In this paper,three non-linear springs are simulated in the connection of self-tapping screws in light steel wall by finite element model analysis.Then,through the establishment of a large number of non-linear finite element model of the slate wall,the integral lateral stiffness and ductility of the wall with different aspect ratio,different phosphogypsum board,different hole location and different hole size are analyzed.