Author(s)

R. Viparelli, A. De Luca, S. Santorelli, A.G. Pizza

Abstract

Pre-stressed concrete large-diameter pipes: joint behaviour during earthquakes R. Viparelli*, A. De Luca\ S. Santorelli*, A. G. Pizza^ *Facolta Ingegneria-Universita Basilicata, Potenza, Italy ^Facolta Ingegneria-Universita "Federico H", Naples, Italy ^Servizio Sismico Nazionale, Rome, Italy Abstract The full efficiency of a pipeline after an earthquake is crucial for the delivery of necessary supplies under maximal emergency conditions. The paper tackles the problem of mechanic reliability of large-diameter pre- stressed concrete bell-and-spigot joints. In previous works [7,8] a new methodology, relying on a totally new approach, was developed for the calculation of pipelines. The pipeline is assumed to consist of a continuum of several sections, each with its own resistance to axial or bending stress; under seismic conditions, it is possible to evaluate the different vibrating modes, with related circular frequencies and contributing factors. Such evaluations allow rotati

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