SPIDA: An Analysis and Design System for Buried Concrete Pipe

by Frank J. Heger, Simpson Gumpertz & Heger Inc, Arlington, MA, USA,
Atis A. Liepens, Simpson Gumpertz & Heger Inc, Arlington, MA, USA,
Ernest T. Selig, Simpson Gumpertz & Heger Inc, Arlington, MA, USA,



Document Type: Proceeding Paper

Part of: Advances in Underground Pipeline Engineering

Abstract:

The paper presents a description of a new computerized direct design method for buried concrete pipe named SPIDA (Soil-Pipe Interaction Design and Analysis). Also the technical basis and some of the results of SPIDA analyses and designs obtained to date with this method are summarized. The soil-structure interaction finite element system, the salient characteristics of the soil and pipe models, the soil and pipe properties and the principal features of the soil meshes that were established for embankment and trench installations are described in the paper. Also summarized are the new reinforced concrete design methods that were developed for shear, radial tension, crack control, and cracked section stiffness. SPIDA calculated deflections for four buried concrete pipe test installations are presented and compared to the measured deflections.

Subject Headings: Concrete pipes | Soil-pipe interaction | Buried pipes | Soil properties | Soil analysis | Structural design | Finite element method

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