Earthquake response analysis of multistorey buildings including foundation interaction

Chopra, Anil K.; Gutiérrez, J.F.

doi:10.1002/eqe.4290030106

Cited by 136 publications

(32 citation statements)

References 15 publications

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“…Material property of the bridge deck is assumed elastic with a thickness identical to thickness of the bridge pier. The assumed averaged properties for the bridge deck are Young modulus E e = 200,000 MPa and equivalent density q e = 28,000 kg/m 3 Thickness of soil overlays above the duct, and the clear distance between neighboring structures is 4.5 and 3.9 m for the base case as shown in Fig. 3c.…”

Section: Neighboring Structures Modelsmentioning

confidence: 99%

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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: Neighboring Structures Modelsmentioning

confidence: 99%

“…According to previous studies on the soil-structure interaction (SSI), structural dynamic responses are reported to be influenced in a soft soil rather than the stiff case [3,10,42]. In the pioneering study, Luco and Contesse [21] designated the SSSI on seismic responses of neighboring buildings.…”

Section: Introductionmentioning

confidence: 99%

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

2015

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“…Most design codes have provided detailed provisions for structure asymmetry and torsion-resistant design [5]. However, the destruction of numerous asymmetric buildings in earthquakes like Bucharest 1977, Mexico City 1985; Kobe 1995 and Bhuj 2001 made researchers realize that soil structure interaction (SSI) can substantially change the seismic performance of asymmetric structures.…”

Section: Introductionmentioning

confidence: 99%

“…Still the approaches not extended for the pile supported asymmetrical buildings. Chopra and Gutierres [5] highlighted out that the numerical methods are most appropriate and accurate methods for soil structure interaction analysis. Followed by this several researchers, including Wegner et al [29] carried out the study for SSI analysis of the asymmetrical building supported by the isolated, raft and shallow foundation system by considering the 3-D and the 2-D nonlinear analysis.…”

Section: Introductionmentioning

confidence: 99%

An efficient approach for assessing the seismic soil structure interaction effect for the asymmetrical pile group

Badry

Satyam

2016

Innov. Infrastruct. Solut.

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All of the civil engineering structures involve some type of structural element which is in direct contact with soil. To estimate the accurate response of the superstructure it is necessary to consider the response of the soil supporting structure, and is well explained in the soil structure interaction analysis. Many attempts have been made to model the SSI problem numerically; however the soil nonlinearity, foundation interfaces and boundary conditions make the problem more complex and computationally costlier. To overcome this problem the attempt has been made to optimize the computational efficiency by applying the equivalent pier method for the deep foundation system. In this research paper the L-shape 11 storey building supported by a pile foundation with homogeneous local soil condition is analyzed for dynamic loading including the SSI effect. The significance of the SSI effect has been studied by comparing the responses of the system for fixed base and flexible base condition. A new approach has been proposed to provide simplicity in SSI modeling and reduce the computational cost (both memory and time wise). The approach includes the applicability of the equivalent pier method for the asymmetrical pile groups system, including SSI effect of the pile foundation system. The approach is validated for group effect and found that equivalent pile method can successfully be adopted and helps to reduce the computational cost of SSI problem. To understand the applicability of EPM approach, the parametric study has been carried out for different input of earthquakes and soil types. In accordance with this the three distinct earthquakes, including 1995 Chamba (M = 4.9), 1999 Uttarkashi (M = 6.9) and 2001 Bhuj (M = 7.7) and soil types including cohesive, cohesionless and C-Phi soils have been considered for SSI analysis. The study observed that, earthquake magnitude and soil type shows the major impact on the response of the SSI system.

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“…The foundation sti ness and damping, which are frequency-dependent, have been expressed by complex-valued impedance functions evaluated by researchers such as Veletsos and Wei [12], Wong and Luco [13] and Aspel and Luco [14]. The relationships between the base shear and overturning moment, acting at the foundationsoil interface, and the corresponding foundation translation and rotation have been expressed in terms of the impedance functions in the Fourier-transformed frequency domain [11,[15][16][17]. Using the proposed formulation, the transfer functions and root-mean-square (r.m.s.)…”

Section: Introductionmentioning

confidence: 99%

Effect of soil interaction on the performance of liquid column dampers for seismic applications

Ghosh

Basu

2005

Earthquake Engng Struct. Dyn.

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SUMMARYThe e ects of soil-structure interaction (SSI) while designing the liquid column damper (LCD) for seismic vibration control of structures have been presented in this study. The formulation for the inputoutput relation of a exible-base structure with attached LCD has been presented. The superstructure has been modelled by a single-degree-of-freedom (SDOF) system. The non-linearity in the oriÿce damping of the LCD has been replaced by equivalent linear viscous damping by using equivalent linearization technique. The force-deformation relationships and damping characteristics of the foundation have been described by complex valued impedance functions. Through a numerical stochastic study in the frequency domain, the various aspects of SSI on the functioning of the LCD have been illustrated. A simpler approach for studying the LCD performance considering SSI, using an equivalent SDOF model for the soil-structure system available in literature by Wolf (Dynamic Soil-Structure Interaction.

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Earthquake response analysis of multistorey buildings including foundation interaction

Cited by 136 publications

References 15 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

An efficient approach for assessing the seismic soil structure interaction effect for the asymmetrical pile group

Effect of soil interaction on the performance of liquid column dampers for seismic applications

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