Seismic Requalification of an Underground RCC Duct

[+] Author and Article Information
Kapilesh Bhargava

 Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, Indiakapiḻ66@magnum.barc.ernet.in

P. Ramesh, A. K. Ghosh, S. Ramanujam

 Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India

J. Pressure Vessel Technol 127(4), 525-529 (Jun 03, 2005) (5 pages) doi:10.1115/1.2043203 History: Received May 24, 2004; Revised June 03, 2005

The present paper deals with the reevaluation of design stresses and assessment of safety margins available for an underground reinforced cement concrete (RCC) duct. For stress analysis, a two-dimensional mathematical model has been adopted to appropriately represent the structure. The structure has been analyzed for both static and seismic loads. The seismic analysis has been carried out for site-specific response spectra. The design checks have been performed using available international standards and, accordingly, the safety margins have been evaluated. The structure has been found to possess sufficient safety margins under all the postulated design loadings. The seismic reassessment methodology conforms to the available international standards.

Copyright © 2005 by American Society of Mechanical Engineers
Topics: Stress , Design , Ducts , Safety
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Figure 3

Seismic ground motion response spectra

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Figure 2

Finite element model of the RCC duct for dynamic analysis

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Figure 1

Structural features of RCC ventilation duct




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