Effect of infill nonlinearity on frame response to tunnelling

Yu, Yalin; Franza, Andrea; Neves, Luis; Marshall, Alec M

Abstract

Tunnel construction is needed for infrastructure development in urban areas. However, underground excavation can detrimentally influence adjacent buildings; in particular , for framed structures with shallow foundations, damage would localise in the infill walls. This paper uses a two-stage analysis method (TSAM) to evaluate the effect of infill nonlinearity on the frame response to tunnelling. First, TSAM results are validated using centrifuge experimental and advanced numerical results. Then, the influence of the infill nonlinearity on the foundation displacements and building deformation parameters are analysed, considering both long and short structures. During this stage, the reinforced concrete (RC) frame and the endwall are modelled as elastic, while both elastic and advanced constitutive models are adopted for the masonry infills. Finally, the role of infill nonlinearity in frame shear and bending behaviours is investigated.

• Conference Name: IS-Macau 2024: 11th International Symposium of Geotechnical Aspects of Underground Construction in Soft Ground
• Conference Location: Macao SAR, China
• Start Date: Jun 14, 2024
• End Date: Jun 17, 2024
• Acceptance Date: Apr 24, 2024
• Deposit Date: May 16, 2024
• Keywords: Finite element modelling; infilled frame; tunnelling; soil-structure interaction; two- stage analysis method
• Public URL: https://nottingham-repository.worktribe.com/output/34864926
• Related Public URLs: https://is-macau2024.skliotsc.um.edu.mo/