Seismic Capacity and Demand of Buried Pipe
Date Issued
2009
Date
2009
Author(s)
Chang, Ming-Li
Abstract
From the various earthquake disasters, besides the building damage, water supply system may be neglected by the people. Those facilities and pipelines of water supply system are often damaged under earthquake. The buried pipes of service pipe line are investigated in this paper. The seismic demand of buried pipe under earthquake is compared with the capacity of buried pipe. If the seismic capacity is greater than the seismic demand that means the strength of buried pipe is enough under seismic excitation.The structure of buried pipe can be generalized to two different types. One is continuous pipe, and the other is segmented pipe. The behavior of two different structure of pipe is studied. The welded joint of continuous pipe possesses significant strength and stiffness to the pipe barrel. The joint of segmented pipe has low strength and stiffness relative to the pipe barrel.The weak joint almost absorb all deformation which is made by ground excitation. The buried pipe could be damaged by three modes which are wave mode, liquefied mode and fault crossing mode.After understanding about the structure and destruction of buried pipe, the two manuals of U.S.A and Japanese are referenced. Two different manuals can lead us to calculate the buried pipe’s seismic demand in 475 and 2500 years return period.After those investigations, the results show that the geological conditions are very important. The seismic demand of buried pipe can be studied better if more detail of geological conditions can be obtained. Finally, the prospect is buildup a seismic evaluation for seismic demand of buried pipe to make sure the Lifeline is secure.
Subjects
water supply system
pipeline
joint
demand
capacity
seismic estimate
SDGs
Type
thesis
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