Numerical simulation of the seismic response of tunnels in sand with an elastoplastic model

Gomes, Rui Telmo

doi:10.1007/s11440-013-0287-7

Cited by 29 publications

(7 citation statements)

References 14 publications

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“…4 Acceleration time history and its response spectrum with 5 % damping ratio for a Kobe and b Northridge earthquakes Acta Geotechnica liquefaction [32], and it is well known that small unit weight underground lifelines buried in liquefiable sandy soil may encounter floatation or upward movement and extra lateral deformation under shear deformation of this soften soil [2,7,15]. In this section, the seismic response of neighboring structural system is investigated on liquefaction with special attention to seismic interaction on the underground duct (Fig.…”

Section: Underground Rc Ductmentioning

confidence: 99%

Seismic interaction of underground RC ducts and neighboring bridge piers in liquefiable soil foundation

2015

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A coupled system of an underground reinforced concrete (RC) duct and a neighboring bridge pier supported by group piles is numerically investigated in sandy soil at both drained and undrained liquefiable states under seismic ground excitations. Parametric studies are conducted to evaluate influencing factors on seismic performances of these neighboring interactive structural systems. The numerical simulations are performed with the finite element code COM3 (COncrete Model for 3D) (Maekawa, Pimanmas and Okamura in Nonlinear mechanics of reinforced concrete, 2003), which is capable of simulation of inelastic performance of RC structure and high nonlinearity of soil medium, especially on the liquefiable loose sand. It is mechanically pointed out that liquefaction-induced uplift of underground ducts is substantially influenced by the presence of on-ground bridges. Alternatively, inertial forces induced to the onground bridge pier are also noticeably affected by the presence of the neighboring underground RC duct. It is pointed in practice of design that these nonlinear interacting responses between these neighboring infrastructures are greatly magnified on liquefiable soil foundations.

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Section: Underground Rc Ductmentioning

confidence: 99%

Seismic interaction of underground RC ducts and neighboring bridge piers in liquefiable soil foundation

2015

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“…The signal waveform of reflection waves observed in the tunnel and its time series can be expressed as [32]: is a synthetic variable and is also the arithmetic product of the refraction coefficient of the forward wave ( 1i E ), the refraction coefficient of the backward wave ( ij E ), and the reflection coefficient of the radial tip ( K R ). in the front of the tunnel face can be inverted on the basis of synthetic data [35]:…”

Section: A the Reflected Wavesmentioning

confidence: 99%

Application of Tunnel Seismic Image Approach to the Advanced Geological Prediction for Tunnel

Guo

Luo

2014

JMM

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With the large-scale construction and rapid development of underground engineering, a large number of underground engineering construction, such as tunnel and subway emerged. The geological structure of the tunnel is complex and the roc is fragmented. Tunnel seismic image is a new geophysical technique. This method has advantages such as high resolution, high reliability and obvious image characteristics. Therefore, to insure the safety of the construction and to eliminate geological disasters, the advanced prediction technology of seismic image in tunnel detection is applied. In the paper, the seismic image was used to detect the Huangzhuang tunnel geological condition. The reflected waves, the refraction wave and the surface waves can reflect the same geological conditions, and the result is in accordance with the drilling. Tunnel seismic image can effectively and safely guide the excavation of the tunnel section working surface in combination with reconstructed images and excavation technology.

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“…These works could expand our knowledge on seismic performance of different types of cross section subway structures. In terms of numerical simulations, several methods are available in the literature for the evaluation of the seismic response of underground structures [15][16][17][18][19][20][21][22][23][24]. For instance, Huo underground structure and the surrounding soil and to identify the causes for different behaviors of similar sections of the Daikai station subjected to the same seismic loading [15].…”

Section: Introductionmentioning

confidence: 99%

“…Shahrour et al carried out elasto-plastic FEM analysis of the seismic response of tunnels in soft soils, the soil behavior was described using an advanced elasto-plastic cyclic constitutive relation involving both isotropic and kinematic hardening [19]. More recently, Gomes described the numerical simulation of a Plane-strain model tunnel centrifuge tests embedded in dry uniform fine sand with dynamic loading with an elasto-plastic model [24].…”

Section: Introductionmentioning

confidence: 99%

Shaking-table tests and numerical simulations on a subway structure in soft soil

Chen

Zuo

et al. 2015

Soil Dynamics and Earthquake Engineering

130

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Numerical simulation of the seismic response of tunnels in sand with an elastoplastic model

Cited by 29 publications

References 14 publications

Seismic interaction of underground RC ducts and neighboring bridge piers in liquefiable soil foundation

Seismic interaction of underground RC ducts and neighboring bridge piers in liquefiable soil foundation

Application of Tunnel Seismic Image Approach to the Advanced Geological Prediction for Tunnel

Shaking-table tests and numerical simulations on a subway structure in soft soil

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