The Stability Analysis Of Temperature Variation And Initial Imperfection On Reticulated Shell Structures

As China’s economic development and scientific and technological progress, spatialstructure are increasingly used in large stadiums, exhibition center, airport hangars, a largecasino and other public building. And the span is increasing, the structure form is innovating.Spatial reticulated shell structure but also for its unique advantages and good visual effect bythe favour of people.The stability of the reticulated shell structure and the ultimate bearing capacity analysisis one of the key technologies of net shell structure. shell structure as a kind of typicalstatically indeterminate structure, under normal use, and after roof heat preservation and heatinsulation effect, so the effect of temperature change on the stability of the reticulated shellnots allow to ignore. In addition, as the defect sensitivity structure, the influence of the defect.Many scholars in the stability analysis of the structure, the temperature changes is consideredseparately or the effects of initial defects on the structural stability, without consideringtemperature variation and the initial defects coupling effect on the structural stability andultimate bearing capacity, so in the design of reticulated shell considering temperaturevariation and the initial defects coupling analysis on stability of structure is the key problem.According to net shell structure building normal use conditions, combined with housingtemperature changes, and indoor heating, cooling, and roofing work, analysis and probes intothe structure when the winter and summer temperature calculation method. On this basis, bymeans of finite element analysis software, set up Kiewitt8structure analysis model,analysisand explore different support conditions, in full span uniformly distributed load, full spanasymmetric load and asymmetric half span load condition, the gauge and temperaturerespectively, the initial geometric defects and their coupling effect, the reticulated shellstructure and the mechanism of bearing force and influence on structural stability, for the netshell structure provides the theory basis for reasonable design and use.