Abstract
In this study, a new method is proposed to evaluate the seismic behavior of buried jointed water pipeline networks subjected to wave propagation. First, using finite element method and solid elements, different kinds of currently used connections in the network are modeled, and their nonlinear behavior in all directions is obtained. Second, a 950-meter long network consisting of ductile iron pipes segments of 6-meter length and springs characterizing the connections, are modeled using beam elements. Three-component displacement record of the Tabas earthquake is applied to the network considering the time lag between support inputs, and the nonlinear soil-pipe interaction. The record is applied once in North-South direction and once in East-West direction with different wave propagation velocities. Results of interest such as stress values and rotations at various points of the network are then obtained, and critical points are introduced in each direction. Results show that the points other than the critical ones at the network intersections remain elastic.
Highlights
Water supply networks are one of the main components of urban infrastructures and their continuous and uninterrupted operation is of great importance in today’s life. These networks are vulnerable to seismic wave propagation, and adverse consequences followed directly or indirectly from damages, affect the citizens
It is worth mentioning that Tyton connections of different diameters are modeled with different lengths, and the results show that the length parameter does affect the connection behavior
When seismic waves propagate in the earth’s surface, phase differences and frequency contents of an incoming wave are the factors contributing in the failure of buried pipe networks
Summary
Water supply networks are one of the main components of urban infrastructures and their continuous and uninterrupted operation is of great importance in today’s life. These networks are vulnerable to seismic wave propagation, and adverse consequences followed directly or indirectly from damages, affect the citizens. Toprak et al [6] evaluated the performance of the water supply system in Denizli, Turkey They compared the relative effects of transient ground deformations and permanent ground deformations based on maps of liquefiable soil and zones of predicted lateral ground displacements.
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