By Edited by John M. Eidinger, P.E., Alex K. Tang, P.Eng., C.Eng., Craig A. Davis, Ph.D., John M. Eidinger
On April 20, 2013, a 6.6 significance earthquake with an epicenter in Lushan struck the southern component of the Longmenshan mountain diversity southwest of Chengdu, Sichuan province, and prompted harm to buildings and lifelines. The worst affected parts integrated the towns of Lushan, Baoxing, Tianquan, Sheungshizhen, and Taipingzhen, with landslides and rockslides inflicting significant highway closures and hampering emergency reaction efforts. This TCLEE Monograph discusses the subsequent lifeline platforms: electrical energy; water distribution; wastewater therapy; roads and bridges; telecommunications; emergency reaction equipment; and crucial and normal construction inventory. basic seismology of the development and geotechnical good points of the realm are incorporated. This monograph should be of curiosity to civil engineers, emergency managers and planners, and govt officers charged with bettering the resilience of lifeline infrastructure platforms in the course of earthquakes, landslides, and rockslides
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Extra info for Lushan, Sichuan Province, China, earthquake of 2013 : lifeline performance
Figure 4-6 shows the 110 kV yard, after it has been repaired. S. The question is why did this yard had so much damage? Twelve of the 110 kV current transformers were broken (Fig. 4-7). Our inspection indicated that one damage mode was due to high-tension forces applied to the terminations, leading to fracture of the porcelain (Fig. 4-8). These high forces were likely due to inadequate cable slack between the current transformers and adjacent switches / circuit breakers, aggravated in large part by swinging wave traps.
It appears that the original cables were used for the replaced equipment; there was no evidence of replaced cables. Damaged components in this photo include candlestick-type circuit breakers, horizontal-break disconnect switches, and current transformers. Figure 4-10 shows one end of the 110 kV yard, with the red circle highlighting two hanging wave traps. When the wave traps swing in the earthquake, they impose large displacements on the flexible bus, leading to high tension forces in the bus when the displacements exceed the available slack.
0). 5). S. codes, the Chinese code includes factors to account for spectral amplification and ductility. S. 10g zone). 18W) in moderately high seismic regions of California. 10g) in this area of China reflects that "China is a developing country" and the relatively lower wealth of this part of China. S. perspective, the introduction of economic variables into setting of prescriptive seismic design levels implies that society is seeking a cost effective solution, balancing initial construction costs against annual probability of earthquakes and their resulting impacts on society - dead and injured people, loss of economic assets and economic function.