Capacity-spectrum push-over analysis of rock-lining interaction model for seismic evaluation of tunnels
Küçük Resim Yok
Tarih
2024
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Techno-Press
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Evaluation of tunnel performance in seismic -prone areas demands efficient means of estimating performance at different hazard levels. The present study introduces an innovative push -over analysis approach which employs the standard earthquake spectrum to simulate the performance of a tunnel. The numerical simulation has taken into account the lining and surrounding rock to calculate the rock -tunnel interaction subjected to a static push -over displacement regime. Elastic perfectly plastic models for the lining and hardening strain rock medium were used to portray the development of plastic hinges, nonlinear deformation, and performance of the tunnel structure. Separately using a computational algorithm, the non-linear response spectrum was approximated from the average shear strain of the rock model. A NATM tunnel in Turkey was chosen for parametric study. A seismic performance curve and two performance thresholds are introduced that are based on the proposed nonlinear seismic static loading approach and the formation of plastic hinges. The tunnel model was also subjected to a harmonic excitation with a smooth response spectrum and different amplitudes in the fully -dynamic phase to assess the accuracy of the approach. The parametric study investigated the effects of the lining stiffness and capacity and soil stiffness on the seismic performance of the tunnel.
Açıklama
Anahtar Kelimeler
earthquake spectrum, nonlinear static analysis, rock, seismic performance, tunnel
Kaynak
Earthquakes and Structures
WoS Q Değeri
N/A
Scopus Q Değeri
Q3
Cilt
26
Sayı
5
