CUED Publications database

Coupled foundation-superstructure analysis and influence of building stiffness on foundation response

Leung, YF and Hoult, NA and Klar, A and Soga, K (2010) Coupled foundation-superstructure analysis and influence of building stiffness on foundation response. In: UNSPECIFIED pp. 61-66..

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Abstract

This paper proposes a simple method to include superstructure stiffness in foundation analyses. The method involves extracting a small "condensed structural matrix" from finite element models of the superstructure, which can then be incorporated into pile group or piled raft analyses using common approaches such as elastic continuum or load transfer methods. The matrix condensation method directly couples structural and geotechnical analyses, and eliminates the need for iterative analyses between structural and geotechnical engineers. Effectiveness of the approach is illustrated through analyses of several buildings designed with a typical floor plan but with varying heights. The parametric study illustrates that superstructure stiffness can have a significant influence on foundation settlement estimates, and the stiffening effects are dominated by the lower stories of the superstructure. The proposed method aims to bridge the gap between structural and geotechnical analyses. Also, being a computationally simple and accurate approach, it is applicable to parametric or optimization studies that would otherwise involve large amounts of analyses. © 2010 ASCE.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Uncontrolled Keywords: Coupling Raft foundations Soil-structure interactions Stiffness Superstructures
Subjects: UNSPECIFIED
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:14
Last Modified: 27 Nov 2014 19:20
DOI: 10.1061/41106(379)6