scholarly journals Seismic response of bridge piers on pile groups for different soil damping models and lumped parameter representations of the foundation

2018 ◽  
Vol 48 (3) ◽  
pp. 306-327 ◽  
Author(s):  
Francisco González ◽  
Luis A. Padrón ◽  
Sandro Carbonari ◽  
Michele Morici ◽  
Juan J. Aznárez ◽  
...  
Keyword(s):  
Seismic Response ◽  
Bridge Piers ◽  
Pile Groups ◽  
Lumped Parameter ◽  
Soil Damping

Spectral matching RotD100 target spectra: Effect on records characteristics and seismic response

2021 ◽  
pp. 875529302110492
Author(s):  
Alan Rivera-Figueroa ◽  
Luis A Montejo
Keyword(s):  
Seismic Response ◽  
Strong Motion ◽  
Bridge Piers ◽  
Spectral Variability ◽  
Reinforced Concrete Bridge ◽  
Energy Demands ◽  
Target Spectrum ◽  
Single Column ◽  
Scaling Down ◽  
Motion Characteristics

This article investigates three different approaches to generate seismic input compatible with RotD100 design spectra: (1) separately matching each horizontal component to the target spectrum, (2) separately matching and then scaling-down the records to improve the match and (3) directly pursuing the match of RotD100 by simultaneously modifying both horizontal components. We examine the strong motion characteristics of the resulting records individually and their variability as suites of input records. The records generated, along with a set of amplitude-scaled records, are used as input for bi-directional non-linear response history analyses of idealized single column reinforced concrete bridge piers with different geometric and reinforcement characteristics. It is shown that the records generated pursuing a direct match of the target spectrum attain the closest match, retain better the strong motion characteristics of the seed records and their horizontal components exhibit a spectral variability comparable to suites of amplitude-scaled records. Regarding the effect on seismic response, the suites constructed separately matching each component consistently imposed larger peak inelastic and total energy demands than all other suites. Directly pursuing the match of RotD100 generated responses close but consistently below the expected from amplitude-scaled suites. The best results were obtained using the direct match methodology but using as target 110% the RotD100 spectrum as required in ASCE 7-16.

Soil-structure interaction effects in single bridge piers founded on inclined pile groups

2017 ◽  
Vol 92 ◽  
pp. 52-67 ◽  
Author(s):  
Sandro Carbonari ◽  
Michele Morici ◽  
Francesca Dezi ◽  
Fabrizio Gara ◽  
Graziano Leoni
Keyword(s):  
Soil Structure ◽  
Interaction Effects ◽  
Bridge Piers ◽  
Soil Structure Interaction ◽  
Pile Groups ◽  
Structure Interaction ◽  
Inclined Pile

Seismic response of caisson-supported bridge piers on viscoelastic soil

2020 ◽  
Vol 139 ◽  
pp. 106341
Author(s):  
Michele Mucciacciaro ◽  
Nikos Gerolymos ◽  
Stefania Sica
Keyword(s):  
Seismic Response ◽  
Bridge Piers

Seismic response of helical pile groups from shake table experiments

2022 ◽  
Vol 152 ◽  
pp. 107008
Author(s):  
A.F. Fayez ◽  
M.H. El Naggar ◽  
A.B. Cerato ◽  
A. Elgamal
Keyword(s):  
Seismic Response ◽  
Shake Table ◽  
Pile Groups ◽  
Shake Table Experiments

Kinematic Seismic Response of Single Piles and Pile Groups

1991 ◽  
Vol 117 (12) ◽  
pp. 1860-1879 ◽  
Author(s):  
Ke Fan ◽  
George Gazetas ◽  
Amir Kaynia ◽  
Eduardo Kausel ◽  
Shahid Ahmad
Keyword(s):  
Seismic Response ◽  
Pile Groups ◽  
Single Piles

Three-dimensional finite element nonlinear dynamic analysis of pile groups for lateral transient and seismic excitations

2004 ◽  
Vol 41 (1) ◽  
pp. 118-133 ◽  
Author(s):  
Bal Krishna Maheshwari ◽  
Kevin Z Truman ◽  
M Hesham El Naggar ◽  
Phillip L Gould
Keyword(s):  
Finite Element ◽  
Seismic Response ◽  
Radiation Effects ◽  
Seismic Analysis ◽  
Dynamic Stiffness ◽  
Three Dimensional ◽  
Nonlinear Dynamic Analysis ◽  
Element Formulation ◽  
Pile Groups ◽  
Pile Cap

The effects of material nonlinearity of soil and separation at the soil–pile interface on the dynamic behaviour of a single pile and pile groups are investigated. An advanced plasticity-based soil model, hierarchical single surface (HiSS), is incorporated in the finite element formulation. To simulate radiation effects, proper boundary conditions are used. The model and algorithm are verified with analytical results that are available for elastic and elastoplastic soil models. Analyses are performed for seismic excitation and for the load applied on the pile cap. For seismic analysis, both harmonic and transient excitations are considered. For loading on the pile cap, dynamic stiffness of the soil–pile system is derived and the effect of nonlinearity is investigated. The effects of spacing between piles are investigated, and it was found that the effect of soil nonlinearity on the seismic response is very much dependent on the frequency of excitation. For the loading on a pile cap, the nonlinearity increases the response for most of the frequencies of excitation while decreasing the dynamic stiffness of the soil–pile system.Key words: pile groups, plasticity, separation, dynamic stiffness, seismic response.

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