Dynamic response of a flexible rectangular underground structure in sand: centrifuge modeling

Ülgen, Deniz; Sağlam, Selman; Özkan, M. Yener

doi:10.1007/s10518-015-9736-z

Cited by 50 publications

(15 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the constraints of surrounding rocks or soil, underground structures are well known to suffer less damage induced by earthquakes than surface structures; thus, underground structures are generally believed to be strongly resistant to earthquakes unless they are crossed by active faults [1,2]. However, many instances of noticeable seismic damage of underground structures were reported during several strong earthquake events, including the Kobe earthquake in Japan [3,4], the Kocaeli earthquake in Turkey [5,6], the Chi-Chi earthquake in Taiwan [7,8], and the Wenchuan earthquake in China [9][10][11]. ese earthquake disasters provide sufficient evidences to demonstrate that the stability of underground structures located in seismically active areas is still an important and emergent issue.…”

Section: Introductionmentioning

confidence: 99%

Effects of Oblique Incidence of SV Waves on Nonlinear Seismic Response of a Lined Arched Tunnel

Lyu

et al. 2020

Shock and Vibration

View full text Add to dashboard Cite

The incident direction of earthquake motion is an important factor affecting the seismic response of underground structures. In this study, a three-dimensional (3D) oblique incidence method of SV waves is proposed and the effects of incident angles of SV waves on the seismic response of a lined arched tunnel are evaluated. Based on wave field decomposition principle and equivalent node force method and together with viscous-spring artificial boundary, the oblique incidence method of SV waves is implemented by transforming seismic wave field into the equivalent nodal forces acting on the artificial boundaries. By deriving the distance of the incident waves and the reflected wave on free surface to artificial boundaries, this method can comprehensively consider the phase difference of the seismic wave propagation and the influence of the damping effect of the rock medium on the seismic wave propagation. The method is programed into a dynamic finite element program and its effectiveness is examined by a numerical example. Consequently, the oblique incidence method is applied to evaluate the seismic behaviors of the tunnel. The numerical results reveal that (1) the oblique incidence of the seismic wave results in a larger seismic response; (2) the response amplitudes of the stress and displacement increase with the increase of incident angles and reaching the maximum in the case of 30° incident angle; (3) the damage extent increases with an increase in the incident angles, and the oblique incidence of the seismic wave is believed to increase the spatial difference of damage distribution.

show abstract

Section: Introductionmentioning

confidence: 99%

Effects of Oblique Incidence of SV Waves on Nonlinear Seismic Response of a Lined Arched Tunnel

Lyu

et al. 2020

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…Although many scholars have used numerical simulation methods to investigate the seismic behavior of soil-structure interactions (e.g., soil-tunnel interactions), an appropriate and more advanced constructive model would better predict the actual behavior of soil under earthquake forces. The use of some constitutive models such as Prevost's multi-yield model and the intergranular strain anisotropy model (ISA) requires complex calibration to determine their various parameters, which decreases their utility in research [23]. However, isotropic/kinematic plastic hardening models, comprising isotropic and kinematic hardening components, accurately predict soil behavior under dynamic loads.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Undrained Seismic Behavior of Shallow Tunnels in Soft Clay Using Nonlinear Kinematic Hardening Model

Asheghabadi

Cheng

2020

Applied Sciences

View full text Add to dashboard Cite

In this study, a soil–tunnel model for clay under earthquake loading is analyzed, using finite element methods and a kinematic hardening model with the Von Mises failure criterion. The results are compared with those from the linear elastic–perfectly plastic Mohr–Coulomb model. The latter model does not consider the stiffness degradation caused by imposing cyclic loading and unloading to the soil, whereas the kinematic hardening model can simulate this stiffness degradation. The parameters of the kinematic hardening model are calibrated based on the results of experimental cyclic tests and finite element simulation. Here, two methods—one using data from cyclic shear tests, and the other a new method using undrained cyclic triaxial tests—are used to calibrate the parameters. The parameters investigated are the peak ground acceleration (PGA), tunnel lining thickness, tunnel shape, and tunnel embedment depth, all of which have an effect on the resistance of the shallow tunnel to the stresses and deformations caused by the surrounding clay soils. The results show that unlike traditional models, the nonlinear kinematic hardening model can predict the response reasonably well, and it is able to create the hysteresis loops and consider the soil stiffness degradation under the seismic loads.

show abstract

“…However, SAJB has relatively poor seismic performance compared with IAJB [6,7]. Meanwhile, the longitudinal structures of bridge and the constraint structures of transverse anti-falling beams in SAJB are easier to damage under seismic load [8][9][10][11][12][13]. Therefore, Zhuang [14] and Chen [15] proposed a new type of micro piles made by concrete to improve the seismic behavior of SAJB.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Dynamic Response Characteristics of RPC and RC Micro Piles in SAJBs

et al. 2019

View full text Add to dashboard Cite

The pile foundations below approach slab in a semi-integral abutment jointless bridge (SAJB) that requires high flexibility to accommodate the horizontal cyclic deformation of approach slab generated by the girder’s thermal expansion and contraction as well as earthquake action. In this paper, reactive powder concrete (RPC) and reinforce concrete (RC) micro piles were designed and fabricated. The shaking table tests on dynamic response of micro piles-soil interaction were conducted to investigate the dynamic response characteristics such as the strain time history of pile-soil system, the bending moment, and the deformation of piles. The maximum strain response of piles was observed at the buried depth of 4.2 D (D is the diameter of pile). Meanwhile, the maximum bending moments of RPC and RC piles appear at the depth of 0.64 D and 0.42 D, respectively, under the dynamic load excitation, and the peak horizontal deformation of piles were observed at pile head. It is found that the bending moment and the strain response of the RPC pile are larger than that of the RC micro pile, and increased by 40% and 98%, respectively. The RPC micro pile has better crack resistance, higher ductility, and flexural rigidity than that of the RC pile, and it can be widely used as pile foundations in SAJBs for the earthquake area.

show abstract

Dynamic response of a flexible rectangular underground structure in sand: centrifuge modeling

Cited by 50 publications

References 29 publications

Effects of Oblique Incidence of SV Waves on Nonlinear Seismic Response of a Lined Arched Tunnel

Effects of Oblique Incidence of SV Waves on Nonlinear Seismic Response of a Lined Arched Tunnel

Analysis of Undrained Seismic Behavior of Shallow Tunnels in Soft Clay Using Nonlinear Kinematic Hardening Model

Experimental Study on Dynamic Response Characteristics of RPC and RC Micro Piles in SAJBs

Contact Info

Product

Resources

About