The structural performances of the new TH-Levy cable dome and the traditional Levy cable dome were analyzed when some components of ridge cable, diagonal cable, hoop cable or strut failed to work. The nonlinear finite element method was used to analyze the static performance of the two structures under fullspan load and half-span load. The Block Lanczos method was used to analyze the dynamic performance of the two structures. The analysis results showed that the upper hoop cables of the new cable dome can decrease structural deformations and component's internal forces when some components failed to work. Respectively, the new cable dome kept good static performance under design load, but the traditional cable dome completely lost structural bearing capacity when one ridge cable failed to work. The new cable dome was slightly better than the traditional cable dome in mechanical performance under design load when one diagonal cable failed to work. The new cable dome can retain parts of the structures to avoid collapse, but the traditional cable dome completely lost bearing capacity when one bottom hoop cable or strut failed to work. The natural frequencies of the new cable dome were greater than those of the traditional cable dome. Decreases of the natural frequencies of the new cable dome were less than those of the traditional cable dome when one ridge cable or diagonal cable failed to work. Results show that the dynamic performance of the new cable dome is better than that of the traditional cable dome.
XU Guo-jie,ZHUO Xin,SHOU Quan-gen,QIU Li-ming,FAN Feng. Structural performance of TH-Levy cable dome when local component failure. J4, 2011, 45(7): 1281-1287.
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