Analysis Of Single Layer Kiewitt Spherical Reticulated Shell For Stability And Resistance To Progressive Collapse

Single layer Kiewitt spherical reticulated shell,on account of its fine appearance,reasonable force and ability of acquiring a larger space,has been used wildly in public buildings,such as convention center,gymnasium and airport terminal.Until now,the progressive collapses of latticed shell around the world have brought about huge economic losses and casualties.And it is likely to encounter the incidental load(snowstorm or earthquake)during the use.Therefore,there has been growing attention on whether the latticed shell has the ability of enduring the load without progressive collapse under the pressure of incidental load.Comparing with double-grid shell structures,single-layer grid shell structures has a lower redundancy and weak progressive collapse resisting capacity.Therefore,the study about the resisting capacity of single layer spherical reticulated shell has the theoretical significance and application value of engineering.In order to study the progressive collapse resisting capacity of single layer spherical reticulated shell under the pressure of vertical loads and earthquake,this paper has carried out the sensitivity analysis and progressive collapse resisting capacity analysis of kiewitt single layer spherical reticulated shell through the employment of alternate path method and ANSYS finite element analysis software.Through analyzing the data,the author proposed an influence rule about how the sensitive bar,node distribution rule and various parameters influence the Kiewitt single layer spherical reticulated shell,which can provide references for concrete engineering design.