Database of rocking shallow foundation performance: Dynamic shaking

Gavras, Andreas G.; Kutter, Bruce L.; Hakhamaneshi, Manouchehr; Gajan, Sivapalan; Tsatsis, Angelos; Sharma, Keshab; Kohno, Tetsuya; Deng, Lijun; Anastasopoulos, Ioannis; Gazetas, George

doi:10.1177/8755293019891727

Cited by 32 publications

(31 citation statements)

References 46 publications

(58 reference statements)

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“…Since then, numerous analytical and numerical research studies have been conducted on the evaluation of SSI for a more accurate seismic response analysis; some recent studies are [10][11][12][13][14]. Several experimental works involving full or reduced scale tests of SSI problem have also been conducted during this period; see [15][16][17][18].…”

Section: Literature Survey On Evaluation Of Ssimentioning

confidence: 99%

Review of Soil-Structure Interaction Based on Continuum Mechanics Theory and Use of High Performance Computing

2021

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Recent achievement of research on soil-structure interaction (SSI) is reviewed, with a main focus on the numerical analysis. The review is based on the continuum mechanics theory and the use of high-performance computing (HPC) and clarifies the characteristics of a wide range of treatment of SSI from a simplified model to a high fidelity model. Emphasized is that all the treatment can be regarded as the result of the mathematical approximations in solving a physical continuum mechanics problem of a soil-structure system. The use of HPC is inevitable if we need to obtain a solution of higher accuracy and finer resolution. An example of using HPC for the analysis of SSI is presented.

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Section: Literature Survey On Evaluation Of Ssimentioning

confidence: 99%

Review of Soil-Structure Interaction Based on Continuum Mechanics Theory and Use of High Performance Computing

2021

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“…Meyerhof (1963) and Allotey and El Naggar (2008)), derived Equation 1b for the rocking moment capacity, which is approximately equal to Equation 1a; FS in Equation 1b is the static factor of safety of the footing with respect to the vertical loading. However, Gavras et al (in press) and Hakhamaneshi and Kutter (2016) explained that Equation 1a is preferred because it can account for the effect of the shape and size of the contact area on the bearing capacity of the loaded edge of a rocking footing.…”

Section: Background On Rocking Foundationsmentioning

confidence: 99%

“…Figure 4e shows that the force-based FS v is similar but somewhat greater than the geometry-based A / A c . Gavras et al (in press) elaborate on factors determining the difference between A / A c and FS v . Finally, Figure 4f plots the bearing pressure ( q ) with respect to the corresponding A / A c .…”

Section: Footing Shape Propertiesmentioning

confidence: 99%

“…In an attempt to compile the key experimental data and results of recent rocking foundation test series (centrifuge and shake table testing), two databases have recently been published. One database (FoRDy) summarizes selected data from dynamic experiments on rocking shallow foundations (Gavras et al, 2019); the other (FoRCy) compiles selected data of rocking foundation performance in monotonic and slow-cyclic loading experiments (Hakhamaneshi et al, 2019). This data paper focuses on the FoRCy database.…”

Section: Introduction To New Foundation Rocking Databasesmentioning

confidence: 99%

“…This data paper focuses on the FoRCy database. Gavras et al (in press) present examples from and describe data from FoRDy. These databases allow public access to the experimental data, and hopefully they will provide a body of data with which future similar experiments may be compared, and numerical simulations may be validated.…”

Section: Introduction To New Foundation Rocking Databasesmentioning

confidence: 99%

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Database of rocking shallow foundation performance: Slow-cyclic and monotonic loading

et al. 2020

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Many physical model tests have examined the performance of rocking foundations during cyclic and seismic loading. These tests varied in model size, testing equipment, superstructure properties, footing shape, supporting soil environment, and loading protocol. “FoRCy, Foundation Rocking database of Cyclic and Monotonic Loading” is a new database (published at https://datacenterhub.org/ ), summarizing the results of monotonic and slow-cyclic loading tests of rocking foundations. The database consists of columns identifying testing equipment and facility, soil, superstructure, and system properties, as well as loading protocol and results. The database contains 456 records (rows), each one being unique in either model configuration or loading amplitude. To illustrate its value, this article shows correlations between (1) settlement, rotation, and factor of safety with respect to bearing capacity and (2) moment and cumulative rotation for shallow footings. Data indicate that the rotation required to mobilize the moment capacity is surprisingly constant (about 0.01 radians) for a wide range of experiments.

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Novel post‐tensioned rocking piles for enhancing the seismic resilience of bridges

El-Hawat

Fatahi

Taciroğlu

2021

Earthq Engng Struct Dyn

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The rocking pile foundation system is a relatively new design concept that can be implemented in bridges to improve their seismic performance. This type of foundation prevents plastic damage at the bridge piers and the foundation system, which are difficult to repair and can lead to collapse. However, lack of adequate energy dissipation in this type of foundation can result in large deck displacements and subsequent catastrophic failures of the bridge. The present study proposes a novel foundation system that integrates post-tensioned piles with the rocking foundation to simultaneously prevent plastic hinging at the piers and reduce the deck displacements during severe earthquakes. The effectiveness of the proposed foundation system is investigated and compared against the rocking pile and conventional fixed-base foundation systems using identical bridge configurations. Three-dimensional finite element models of these bridges were developed to capture possible nonlinear behavior of the bridge as well as soil-structure interaction effects. Six strong earthquakes with both horizontal components were selected and scaled to the appropriate seismic hazard level with a return period of 2475 years. Static pushover and nonlinear time-history analyses were then performed to compare the dynamic response of the bridges, including deck displacements, pier and pile inertial forces, and other nonlinear behavior experienced by the structure. The results reveal that by integrating the post-tensioned piles with the rocking foundation, the deck displacements were reduced to an acceptable limit without subjecting the bridge to any damage. In contrast, the bridge with the fixed base foundation experienced extensive damage at the piers, and the bridge with the rocking foundation experienced substantial deck displacements that ultimately led to unseating, resulting in the collapse of both bridges. It was therefore concluded that the proposed rocking foundation system with post-tensioned piles is the superior alternative and can be implemented in practice as an attractive solution due to the seismic protection it offers.

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Database of rocking shallow foundation performance: Dynamic shaking

Cited by 32 publications

References 46 publications

Review of Soil-Structure Interaction Based on Continuum Mechanics Theory and Use of High Performance Computing

Review of Soil-Structure Interaction Based on Continuum Mechanics Theory and Use of High Performance Computing

Database of rocking shallow foundation performance: Slow-cyclic and monotonic loading

Novel post‐tensioned rocking piles for enhancing the seismic resilience of bridges

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