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Civil-Comp Proceedings
ISSN 1759-3433 CCP: 29
ADVANCES IN STRUCTURAL ENGINEERING COMPUTING Edited by: B.H.V. Topping and M. Papadrakakis
Paper V.1
Design of Prestressed Concrete Beams using System Reliability and Optimization A.S. Al-Harthy* and D.M. Frangopol#
*Department of Civil Engineering, Sultan Qaboos University, Al-Khoudh, Oman
A.S. Al-Harthy, D.M. Frangopol, "Design of Prestressed Concrete Beams using System Reliability and Optimization", in B.H.V. Topping, M. Papadrakakis, (Editors), "Advances in Structural Engineering Computing", Civil-Comp Press, Edinburgh, UK, pp 71-79, 1994. doi:10.4203/ccp.29.5.1
Abstract
In this paper, second moment reliability methods for
components and systems are integrated with optimization
tools in the design of prestressed concrete (PC) beams. Loading,
material properties, prestressing force levels, as well as
the models used to predict flexural behavior are all treated
as random variables. The performance functions considered
are related to the stresses at initial and final stages as well as
the flexural strength of the beam. System reliability methods
are used to compute the probabilities of unsatisfactory
performance of PC beams at these limit states. Reliability-based
design examples of double tee PC beams commonly
used in the construction industry are presented to illustrate
the proposed approach. Additionally, design charts are proposed
to make easier the implementation of the proposed
method.
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