Theoretical Analysis And Experimental Research For Load-carrying Capacity Of Steel Bar Truss Slab

With the development of our national economy, people pay more and moreattention to steel structure buildings in recent years. And steel bar truss slab hasbeen widely adopted. Acoording to some achieved research data, the structuralbehavior of steel bar truss slab is better than that of concrete slab. In order to makea deep research on the structural behavior of steel bar truss slab, we have designeda full-scale slab experiment. Firstly, two-point monotonic loads test was performedto8steel bar truss slabs, and wo got Load-deflection curves, Load-steel straincurves, Load-concrete strain curves, neutral axis developing curves and ect,basedon processed test data. The influence pattern was obtained through the analysis ofthe test results. And shear-span ratio, the steel slabs, the thickness of the compositelayer have an effect on load-carrying capacity of steel bar truss slab.In order to increase the quality of test components, the FEM ANSYS was alsoused to simulate monotonic static loading process of the slab. By analysis ondifferent value of parameters—shear-span ratio, steel sheeting, diagonal webmember, the same conclusion with the influence pattern of rigidity was achieved aswell as the test’s.Effective inertia method and static equilibrium method were used to calculatethe cracking load and ultimate load. By comparing with the test results, we find thatthe calculated value of effective inertia method is closer to the test result than thatof static equilibrium method. According to the results of the test and somereference data, the formula of load-carrying capacity is advanced for futurereference. And the modified factor is also given.