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seismic design-10 miles length oil pipeline (mult. support e
hi:
we are in the process of analyzing a proposed fuel line to transport bunker c and diesel fuel from a dock to an existing tank facility. both pipes (20 and 24") runs along the side way of an existing main road and they will have a series of overpass to overcome some creeks at the area. approximately 80 percent of the pipeline will be located above ground from 3 to 6 feet in height and the other 20% will be buried around 48" below finish grade. this pipeline will be located on a seismic zone 3 and no active fault has been detected at the area after a preliminary seismic hazard analysis.
for this amount of pipe length, we are wondering if under a seismic event we have to consider a different approach as we normally proceed with a building or any other structure that has to comply with the regulatory design codes. we are still designing under the ubc 97 and the question is as follows:
1) what decides if a special seismic analysis is required for this application:
* pipeline length,
* pipeline geometry and/or geography location,
* api or any other code regulation,
* nature and/or location of supports
2) is it strictly necessary to perform a multiple support excitation analysis?
3) how does any of these analysis could affect the stress analysis that is normally performed to this type of pipeline?

2009-09-15, 08:48 PM	#1
huangyhg 超级版主注册日期: 04-03 帖子: 18592 精华: 36 现金: 249466 标准币资产: 1080358888 标准币	seismic design-10 miles length oil pipeline 9mult. support e seismic design-10 miles length oil pipeline (mult. support e hi: we are in the process of analyzing a proposed fuel line to transport bunker c and diesel fuel from a dock to an existing tank facility. both pipes (20 and 24") runs along the side way of an existing main road and they will have a series of overpass to overcome some creeks at the area. approximately 80 percent of the pipeline will be located above ground from 3 to 6 feet in height and the other 20% will be buried around 48" below finish grade. this pipeline will be located on a seismic zone 3 and no active fault has been detected at the area after a preliminary seismic hazard analysis. for this amount of pipe length, we are wondering if under a seismic event we have to consider a different approach as we normally proceed with a building or any other structure that has to comply with the regulatory design codes. we are still designing under the ubc 97 and the question is as follows: 1) what decides if a special seismic analysis is required for this application: * pipeline length, * pipeline geometry and/or geography location, * api or any other code regulation, * nature and/or location of supports 2) is it strictly necessary to perform a multiple support excitation analysis? 3) how does any of these analysis could affect the stress analysis that is normally performed to this type of pipeline? __________________ 借用达朗贝尔的名言：前进吧，你会得到信心! [url="http://www.dimcax.com"]几何尺寸与公差标准[/url]