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

TY - JOUR

T1 - System Identification of Tunnel Response to Ground Motion Considering a Simplified Model

AU - Alonso-Rodriguez, Andres

AU - Nikitas, Nikolaos

AU - Knappett, Jonathan

AU - Kampas, Georgios

AU - Anastasopoulos, Ioannis

AU - Fuentes, Raul

N1 - This work was sponsored by a Newton Fund Initiative, supported jointly by the Engineering and Physical Sciences Research Council of the UK and the National Commission for Scientific and Technological Research of Chile, grant EP/N03435X/1.

PY - 2018/7/20

Y1 - 2018/7/20

N2 - 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.

AB - 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.

KW - system identification

KW - simplified models

KW - tunnel seismic response

KW - closed-form solutions

KW - structural monitoring

U2 - 10.3389/fbuil.2018.00039

DO - 10.3389/fbuil.2018.00039

M3 - Article

SN - 2297-3362

VL - 4

SP - 1

EP - 11

JO - Frontiers in Built Environment

JF - Frontiers in Built Environment

M1 - 39

ER -