Experimental Research On Mechanical Properties Of Straw Concrete And Finite Element Analysis Of Multi-ribbed Composite Wall

Straw concrete is a new type of energy-saving and green buildingmaterials. It has some advantages, such as low density, good heat preservationcapacity and environmental friendly. It is made up of plant fiber and concrete.Corn straw was used in this paper; it is economical to be widely used in ruralareas.Multi-ribbed composite board structure is a new type of structure system,integrated with functions of containment, bearing load and anti-seismic, it hasgood performance in exist study and engineering. The straw concrete multi-ribbed composite wall in this paper is made up of normal concrete as grid frame,filling with straw concrete blocks. Thus it has low weight, heat preservation andproperty of energy-consumption.On the basis of a huge amount of literature and data, this paper made aexperiment study about mechanical properties of straw concrete blocks, builtfinite element model with constitutive relation of straw concrete, discussed themulti-ribbed composite board’s property of energy-consumption. The maincontents are as follows:1. This paper made two types concrete blocks with10%and15%straw, madea experiment about the compressive strength of prismoid and cube, got thecompressive strength, elasticity modulus and the complete curve equation. 2. This paper used FEA software ABAQUS, built and improved the model ofconcrete multi-ribbed composite wall, compared the FEA model withexperimental model, confirmed the accuracy of FEA method. Then the papersimulated the stress state of multi-ribbed composite wall under horizontal lowcyclic load, made the hysteretic curve, analyzed seismic and energy dissipationperformance of the wall.3. Based on the properties of straw concrete, the derivation formula of inclinedsection shear bearing capacity has been made by the paper. The influencecoefficient of blocks has been corrected by the FEA calculation to adapt theformula of inclined section bearing capacity of straw concrete multi-ribbedcomposite wall. At last, this paper discussed the influence factors of shearbearing capacity and the application scope of the formula.