Abstract
Mathematical models have become the target of numerous attempts to obtain results that can be extrapolated to the study of hydraulic pressure infrastructures associated with different engineering requests. Simulation analysis based on finite element method (FEM) models are used to determine the vulnerability of hydraulic systems under different types of actions (e.g., natural events and pressure variation). As part of the numerical simulation of a suspended pipeline, the adequacy of existing supports to sustain the pressure loads is verified. With a certain value of load application, the pipeline is forced to sway sideways, possibly lifting up off its deadweight supports. Thus, identifying the frequency, consequences and predictability of accidental events is of extreme importance. This study focuses on the stability of vertical supports associated with extreme transient loads and how a pipeline design can be improved using FEM simulations, in the design stage, to avoid accidents. Distribution of bending moments, axial forces, displacements and deformations along the pipeline and supports are studied for a set of important parametric variations. A good representation of the pipeline displacements is obtained using FEM.
Highlights
Accidents associated with natural events or human actions are a common cause of hydraulic system failure
The first simulation is performed for combination ULS1, where the overloading is the internal pressure, during normal conditions, plus 2000 N applied in the vertical direction, for pipelines located 3 m from the ground according to [28]
The purpose purpose of of this this study study is is to to ensure ensure that thatin incase caseof ofan anextreme extremeevent, event,such suchas asaawater-hammer, water-hammer, the pipeline system will perform its intended function: position retention (the pipeline the pipeline system will perform its intended function: position retention, fall), leak tightness(the, and operability, and operability
Summary
Accidents associated with natural events or human actions are a common cause of hydraulic system failure. External ones may result from extreme events (i.e., such as storms, floods, landslides, earthquakes, sudden releases or ruptures) and can be a consequence of structural characteristics, maintenance state, or hydraulic operation devices [1]. Pipe systems, especially those installed above the ground, are under relevant dynamic forces during the occurrence of transients (water-hammer). The behaviour of the fluid and the structure can be studied as a whole, with a structural model, if appropriate load combinations are adopted This approach allows the possible consequences to be shown in terms of displacements and the vulnerability of the pipeline and its supports. The importance of detailed studies of identical system behaviour for different loads in the infrastructure design is emphasized
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