Effect of Construction and Service Loads on Reliability of Existing RC Buildings
Publication: Journal of Structural Engineering
Volume 127, Issue 10
Abstract
For existing structures, information about “safe” past performance (such as prior load history) may be used to update the probability distribution of resistance and hence reliability. This technical note investigates the effect of realistic construction loading with sustained dead and live loads and extraordinary live loads on time-dependent probabilities of failure. Structural configurations considered include RC floor beams and slabs designed to ACI 318, for various live-to-dead load ratios and construction periods for typical RC multistory buildings. The results show, for example, that the probability of failure for an existing structure after 5–10 years of occupancy is one or more orders of magnitude lower than that prior to the application of construction loads. This suggests that, if a structure survives construction and early service (occupancy) loads, then its reliability is increased significantly. Finally, for cases where prior service live loads are unknown, the inclusion of construction dead loads alone will still lead to significant increases in structural reliability.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 127 • Issue 10 • October 2001
Pages: 1232 - 1235
History
Received: Mar 29, 2000
Published online: Oct 1, 2001
Published in print: Oct 2001
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