Research On Mechanical Properties Of Profiled Steel Sheets-Wheat Straw Concrete Composite Slabs

Compared with common reinforced concrete slabs,the weight of lightweight aggregate concrete composite slabs decreases rapidly,this composite slab has attracted much attention because of its simple construction process,fast speed and good economic effect.At present domestic researchers have started research on it.In this paper,the author mixed lightweight aggregate concrete with wheat straw for the first time and then analyzed the mechanical performance of this kind of composite slabs.As a byproduct,wheat straw is used to realize the full use of resource,avoiding the environment pollution caused by some straw burning at the same time;In this article,the strength of the new type of concrete configured is higher,which can fully satisfy the requirements made by technical specification for lightweight aggregate concrete about use of lightweight aggregate concrete structure.On the premise of guaranteeing its strength,the density reduces effectively,greatly decreasing the weight of the composite slabs,which has important economic significance,making the development prospect about the kind of composite slab is very considerable.This paper mainly completed two parts.The wheat straw concrete experiment was carried out firstly,and analyzed the influence because of the factors such as dosage of wheat straw,water cement ratio on the mechanical properties and structural properties,configuring out a new type of concrete with low density and proper intensity.Based on this,finite element simulation analysis was carried out on the wheat straw concrete composite slabs,setting up variable values of thickness of profiled steel sheets,thickness of composite slabs and shear span reasonably in this paper.Through the variable combination,multiple sets of composite slabs were designed,on which the finite element simulation analysis was carried out,studying the influence of these factors on the mechanical performance and the failure mechanism of composite slabs,confirming the failure types,discussing the bearingcapacity of this kind of composite slabs at the same time,and drawing out some conclusions.At last,some corresponding suggestions are put forward to research the wheat straw concrete composite slabs in the future.