Uplift Resistance of Long Pipelines in the Presence of Seismic Forces

Chakraborty, Debarghya and Kumar, Jyant (2014) Uplift Resistance of Long Pipelines in the Presence of Seismic Forces. In: JOURNAL OF PIPELINE SYSTEMS ENGINEERING AND PRACTICE, 5 (4).

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Abstract

The vertical uplift resistance of long pipes buried in sands and subjected to pseudostatic seismic forces has been computed by using the lower-bound theorem of the limit analysis in conjunction with finite elements and nonlinear optimization. The soil mass is assumed to follow the Mohr-Coulomb failure criterion and an associated flow rule. The failure load is expressed in the form of a nondimensional uplift factor F-gamma. The variation of F-gamma is plotted as a function of the embedment ratio of the pipe, horizontal seismic acceleration coefficient (k(h)), and soil friction angle (phi). The magnitude of F-gamma is found to decrease continuously with an increase in the horizontal seismic acceleration coefficient. The reduction in the uplift resistance becomes quite significant, especially for greater values of embedment ratios and lower values of friction angle. The predicted uplift resistance was found to compare well with the existing results reported from the literature. (C) 2014 American Society of Civil Engineers.

Item Type:	Journal Article
Publication:	JOURNAL OF PIPELINE SYSTEMS ENGINEERING AND PRACTICE
Additional Information:	Copyrights for this articles belongs to the ASCE-AMER SOC CIVIL ENGINEERS, 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	14 Dec 2014 10:15
Last Modified:	14 Dec 2014 10:15
URI:	http://eprints.iisc.ac.in/id/eprint/50430

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