Elastoplastic solutions to predict tunnelling-induced load redistribution and deformation of surface structures

Authors
DeJong, Matthew J 

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Type
Article
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Abstract

In this paper, an elastoplastic two-stage analysis method is proposed to model tunnelling-induced soil-structure interaction and incorporated into a computer program `ASRE'. This solution allows considering both vertical and horizontal greenfield ground movements, gap formation and slippage, continuous or isolated foundations, and a variety of structural configurations and loading conditions. After introducing the proposed formulation, the model predictions are first compared with previously published data for validation. Then, to isolate the effects of various structural characteristics (relative beam-column stiffness, presence of a ground level slab, column height, number of storeys) and foundation types (continuous versus isolated), several example structures are analysed. Results demonstrate the value of the proposed analysis method to study a broad range of building characteristics very quickly, and show how the soil-structure interaction occurring due to underground excavations is altered by both foundation and superstructure configurations. In particular, the difference in behaviour between equivalent simple beams and framed structures on separated footings is clarified.

Publication Date
2019-04-04
Online Publication Date
2019-01-28
Acceptance Date
2018-09-05
Keywords
4005 Civil Engineering, 40 Engineering, 4019 Resources Engineering and Extractive Metallurgy
Journal Title
Journal of Geotechnical and Geoenvironmental Engineering - ASCE
Journal ISSN
1090-0241
1943-5606
Volume Title
145
Publisher
ASCE
Sponsorship
Engineering and Physical Sciences Research Council (EP/N021614/1)
Engineering and Physical Sciences Research Council (EP/N509620/1)
Technology Strategy Board (920035)
Engineering and Physical Sciences Research Council
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