Behaviour of a Segmental Tunnel Lining Under Seismic Actions. (2016)

• Record Type: Journal Article
• Authors: Fabozzi, Stefania; Bilotta, Emilio
• Is Part Of: Procedia engineering. Volume 158(2016)
• Page Start: 230
• Page End: 235
• Publication Date: 2016
• Subjects: Circular tunnel -- seismic actions -- excavation process -- segmental lining -- three-dimensional FE analyses; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Conference proceedings; Periodicals; 620.005
• DOI: 10.1016/j.proeng.2016.08.434
• Languages: English
• ISSNs: 1877-7058

Abstract

Abstract: Full dynamic analyses that follow a coupled approach for the soil-structure interaction, provides satisfactory interpretation of non-linear boundary problems during earthquakes. This paper illustrates the results of a numerical study aimed at modelling the performance of continuous and segmental linings of shallow tunnel under seismic loading. A set of 3D finite-element full dynamic analyses have been carried out, calibrated on the experimental results of a centrifuge test on a model tunnel in a dense dry sand layer subjected to transversal dynamic loading [1]. The numerical study was extended to model and compare the seismic demand of a continuous and a segmental reinforced concrete lining, including the effect of the excavation process on the pre-seismic conditions and the influence of different input signals. The results show that even in rather simple ground conditions, a suitable constitutive model for soil is needed to capture the effect of soil-lining interaction during and after the seismic event.