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Title: Seismic response of offshore guyed towers

Abstract

Seismic stresses in the offshore Guyed Tower assumes importance because of its flexural modes having smaller periods (in the range of 1 to 3 sec), which may attract considerable seismic forces. Since the displacement of the offshore Guyed Tower is generally guided by the rigid body mode corresponding to the fundamental period which lies between 20 to 40 sec., seismic excitation is relatively unimportant in relation to the towers` overall displacement behavior. The response of offshore Guyed Tower to ransom ground motion (E1 Centro earthquake, 1940) is investigated. The guyed tower is modeled as a uniform shear beam with a rotational spring at the base of the tower. The guylines are represented by a linearized spring whose force-excursion relationship is derived from a separate static analysis of the guylines. The dynamic equation of motion duly takes into account the pressure-drag effect produced due to fluid-structure interaction. The response is obtained in tim- domain using Newmark`s {beta} Time Integration Scheme.

Authors:
;  [1]
  1. Indian Inst. of Tech., New Delhi (India). Civil Engineering Dept.
Publication Date:
OSTI Identifier:
402997
Report Number(s):
CONF-940473-
ISBN 1-880653-15-X; TRN: IM9651%%32
Resource Type:
Conference
Resource Relation:
Conference: Special offshore symposium, Beijing (China), 17-18 Apr 1994; Other Information: PBD: 1993; Related Information: Is Part Of The proceedings of the special offshore symposium China; Li, Y.C. [ed.] [Dalian Univ. of Technology (China)]; Chung, J.S. [ed.] [Colorado School of Mines, Golden, CO (United States)]; PB: 797 p.
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; OFFSHORE PLATFORMS; SEISMIC EFFECTS; MOORINGS; RESPONSE FUNCTIONS; WAVE FORCES

Citation Formats

Jain, A K, and Bisht, R S. Seismic response of offshore guyed towers. United States: N. p., 1993. Web.
Jain, A K, & Bisht, R S. Seismic response of offshore guyed towers. United States.
Jain, A K, and Bisht, R S. 1993. "Seismic response of offshore guyed towers". United States.
@article{osti_402997,
title = {Seismic response of offshore guyed towers},
author = {Jain, A K and Bisht, R S},
abstractNote = {Seismic stresses in the offshore Guyed Tower assumes importance because of its flexural modes having smaller periods (in the range of 1 to 3 sec), which may attract considerable seismic forces. Since the displacement of the offshore Guyed Tower is generally guided by the rigid body mode corresponding to the fundamental period which lies between 20 to 40 sec., seismic excitation is relatively unimportant in relation to the towers` overall displacement behavior. The response of offshore Guyed Tower to ransom ground motion (E1 Centro earthquake, 1940) is investigated. The guyed tower is modeled as a uniform shear beam with a rotational spring at the base of the tower. The guylines are represented by a linearized spring whose force-excursion relationship is derived from a separate static analysis of the guylines. The dynamic equation of motion duly takes into account the pressure-drag effect produced due to fluid-structure interaction. The response is obtained in tim- domain using Newmark`s {beta} Time Integration Scheme.},
doi = {},
url = {https://www.osti.gov/biblio/402997}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Dec 31 00:00:00 EST 1993},
month = {Fri Dec 31 00:00:00 EST 1993}
}

Conference:
Other availability
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