Analytical Solution of Cable Tray Hanger 3D Structural Interaction under Seismic Loading

by Indrajit K. Ghosh, California Engineering Research, Los, Angeles, CA, USA,
Sudhir K. Jain, California Engineering Research, Los, Angeles, CA, USA,
Winston G. Perera, California Engineering Research, Los, Angeles, CA, USA,

Document Type: Proceeding Paper

Part of: Structural Engineering in Nuclear Facilities


Structural design of cable tray hangers is controlled by the Nuclear Regulatory Commission's stringent requirements of seismic analysis. A finite element space frame model consisting of several bays including the trays using modal analysis response spectrum method is the ideal method of analysis. However, due to high computer and man hour costs, often simplified decoupling methods are sought introducing inaccuracies in the design of the hanger system. The present paper outlines a very convenient, easy, and cost-effective analytical method resulting in coupled interaction differential equations which models the cable tray and its supporting members (legs and beams) in three dimensions.

Subject Headings: Cables | Seismic loads | Three-dimensional analysis | Earthquake resistant structures | Structural analysis | Seismic tests | Finite element method | Space frames

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