System Identification of Tunnel Response to Ground Motion Considering a Simplified Model

Frontiers in Built Environment

Anastasopoulos, Ioannis¹  Kampas, Georgios²  Nikitas, Nikolaos³  Alonso-Rodriguez, Andres³  Knappett, Jonathan⁴  Fuentes, Raul⁵ 

[1] Chair of Geotechnical Engineering, ETH ZüDepartment of Engineering Science, University of Greenwich, United Kingdom;School of Civil Engineering, University of Leeds, United Kingdom;School of Science and Engineering, University of Dundee, United Kingdom;rich, Switzerland

关键词: system identification;    Simplified models;    Tunnel seismic response;    closed-form solutions;    Structural Monitoring;   

DOI  :  10.3389/fbuil.2018.00039

学科分类：建筑学

来源: Frontiers

【 摘 要 】

This paper presents a simplified model using coupled Bernoulli and shear beams supported by Winkler-type springs for system identification of tunnels subjected to earthquake-induced ground motions. The model formulation is introduced and closed-form solutions to the modal characteristic equation and mode shapes are derived. The latter are verified against the results of numerical models. Then, the system identification algorithm is presented, showcasing its ability to recover model parameters when recorded acceleration time histories along the tunnel are compromised by noise and sensor locations are varied. The presented framework can be used to initially and, simply, recover tunnel response when monitoring data is available, or to plan for monitoring campaigns in newly constructed or existing tunnels.

【 授权许可】

CC BY