The Research Of Slab Design On Steel Staggered-truss Structure System

As a new type with prominent features structure system,steel staggered-trussstructure system has a mature research so far,but most of the previous study of thestructure is concentrated on static and dynamic force,the component of stressanalysis and so on.Relative to character,in view of the steel staggered-truss structuresystem on the spatial analysis method,the research of slab design is few.The conventional assumption of rigid slab is used in simplified hand method ofsteel staggered-truss structure system.In the space analysis,whether the assumptionof rigid slab or flexible can reflect the mechanical characteristics of steelstaggered-truss structure system is in doubt?How to estimate the shear layer betweenthe upper truss and the lower truss after redistribution,and that can determine themost unbearable slab in the bedding face shear? When opening hole on slab,theoverall analysis and slab problem of itself stress influence isn’t effectively studied.Based on the above problems,the author mainly analyzed a related designexamples and completed the following job contents.(1)For typical architecture style of steel staggered-truss structure system,thethree dimensional space finite element analysis model of a design example is set.Compared the analysis results of the assumption of rigid slab, the assumption offlexible slab and the standard of the hand consequence,it is accepted that thetraditional assumption of the rigid slab can meet requirements of steelstaggered-truss structure system of the overall analysis accuracy;(2)According to the cases of different space truss layout,the author researchedthe space analysis of each design example.By generalizing the interlayer shear forceson the slab of the truss distribution rule,the slab simplified formula of the mostbedding face shear;(3) According to the cases of opening hole on slab,the author established thetentative design examples of space analysis model.By changing openingparameters,the author also researched the overall stress impact of steelstaggered-truss structure system with opening hole on slab and studied the shearrelay of slab in different opening situations.Key words:Staggered Truss;Overall Stress Distributions;Opening Hole on...