Shape matters

Influence of varying settlement profiles due to multicausal subsidence when modelling damage in a masonry façade

Conference paper (2023)

Authors

A. Prosperi Applied Mechanics - CEG
M. Longo Applied Mechanics - CEG
Paul A. Korswagen Applied Mechanics - CEG
M. Korff , Deltares
J.G. Rots Applied Mechanics - CEG
Research Group
Applied Mechanics (CEG) (TU Delft)
Copyright: © 2023 A. Prosperi, M. Longo, Paul A. Korswagen, M. Korff, J.G. Rots
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Published Date

2023

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Materials- Mechanics- Management & Design

Research Group

Applied Mechanics

Abstract

This paper demonstrates the use of non-linear finite element modelling to investigate the response of structures subjected to different shapes of subsidence-related ground settlements. The approach is presented with reference to a two-storey unreinforced masonry façade resting on a shallow foundation. Eight realistic settlement shapes, based on field and literature data, are applied in the model with increasing intensity. The intensity of the subsidence profiles is characterized using their (angular) distortion. The extent of the induced damage on the façade is objectively and directly quantified by a damage parameter, based on the number of cracks, their length and opening. The performance of different settlement indicators and corresponding limiting values, typically employed in the state of the art, is in this paper discussed in relation to the damage modelling strategy; these are observed to be dependent on the shape of the settlement profiles. The aim of this paper is thus to provide insight into the extent to which the vulnerability of masonry buildings depends on the shape of the subsidence pattern and may serve as a warning not to use (deterministic) damage indicators such as angular distortion without considering the settlement shape.

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