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Predicting reinforced concrete frame response to excavation induced settlement
Date Issued
2009-11
Date Available
2010-08-06T16:30:05Z
Abstract
In many tunneling and excavation projects, free-field vertical ground movements have been used to predict subsidence and empirical limits have been employed to evaluate risk. Validity of such approaches given the reality of two-dimensional ground movements and the influence of adjacent applied loads has been largely unknown. This paper employed analytical and large-scale experimental efforts to quantify these issues, in the case of a reinforced concrete frame structure adjacent to an excavation. Nearly half of all soil and building movements occurred prior to installation of the first tie-back, even when conservative practices were applied. Free-field data generated a trough half the size of that recorded near the building frames. Empirically based relative gradient limits generally matched the extent and distribution of the damage. Application of various structural limits also generally reflected global experimental response but did not fully identify local damage distribution. Fully free-field data or failure to include accurate two-dimensional soil displacements under-predicted building response by as much as 50% for low-rise concrete frames without grade beams.
Sponsorship
Science Foundation Ireland
Other Sponsorship
NDRC
Type of Material
Journal Article
Publisher
American Society of Civil Engineering (ASCE)
Journal
Journal of Geotechnical and Geoenvironmental Engineering
Volume
135
Issue
11
Start Page
1605
End Page
1619
Copyright (Published Version)
2009 ASCE
Subject – LCSH
Reinforced concrete--Evaluation
Subsidences (Earth movements)--Forecasting
Excavation
Settlement of structures--Forecasting
Language
English
Status of Item
Peer reviewed
ISSN
1090-0241
This item is made available under a Creative Commons License
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