Carrying Capacity Analysis Of Under Fire The Kewitte Single-layer Latticed Spherical Steel Truss Dome

The Kewitte single-layer latticed spherical steel truss dome is a new type of network shell created by Kewitte in order to improve the facilities and the Schwedler Latticed Domes and square mesh size of the shortcomings of asymmetrical. It is the triangle mesh divided into relatively spherical symmetry by the bar system, zonal and diagonal truss beam size, also called the parallel network of shell. It has not only the size of the grid symmetry, and internal force distribution, thereby commonly it is used in large, medium-span of the dome, such as gymnasiums, shopping malls, convention centers, construction.These public buildings are under the status of personnel-intensive for long time. In the event of fire, the collapse before evacuation of personnel in security, it will result in a large number of casualties and major economic losses. In the past the research of shell of the network focused on the stability of the shell, but the analysis of their load-bearing capacity under high temperature is also less. Therefore, it is necessary to have an in-depth study about carrying capacity of The Kewitte single-layer latticed spherical steel truss dome in high temperature to ensure that when the fire broke out the structure have sufficient fire resistance.In this paper, taking full account of geometric nonlinearity and material nonlinearity take the finite element method to analyse non-linear load-bearing capacity of the heat-structure of the Kewitte (K8)single-layer latticed spherical steel truss dome under high temperature and 125 casesFirst of all, take the way of transient thermal analysis using ANSYS finite element software with a single pole, to analyse temperature field of partial and overall fire of the The Kewitte single-layer latticed spherical steel truss dome.Secondly, through the heat - structure of multi-physics coupling, take ANSYS finite element software curve method to analyse load-bearing capacity of The Kewitte(K8) single -layer latticed spherical steel truss dome under fire through the overall 80 cases, its fire-resistant Limit under the all high temperature to collect are compared in the field of the different load size, span different, fire resistance because of different rise-to-span ratio. Take into account the overall stability of the structure under fire.Finally, through the heat - structure of multi-physics coupling, use ANSYS finite element software curve method to analyse load-bearing capacity of localized fire of the Kewitte single-layer latticed spherical steel truss dome under fire to the whole process of 55 cases. Get its fire-resistant the limits under the high temperature then to compare with different fire scenarios, different span, the impact of its fire resistance because of different rise-to-span. Compare of the different effects to load-bearing capacity under the part and the whole structure fire. By the paper,we can know the different factor in load-bearing capacity The Kewitte single-layer latticed spherical steel truss dome under the high temperatures, its fire resistance and fire resistance design for conducting The Kewitte(K8) single-layer latticed spherical steel truss dome Selection of the actual shell structure it provides the basis for engineering design; during the local fire analysis of the overall structure, it has certain real significance to the project.