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Development of a Reduced-order Simul...

Ghimire, Pratibha,

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Development of a Reduced-order Simulation Model for the Nonlinear Response Analysis of a Large-scale Laminar Soil Box Experimental System /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Development of a Reduced-order Simulation Model for the Nonlinear Response Analysis of a Large-scale Laminar Soil Box Experimental System // Pratibha Ghimire.
Author:	Ghimire, Pratibha,
Description:	1 electronic resource (99 pages)
Notes:	Source: Masters Abstracts International, Volume: 85-12.
Contained By:	Masters Abstracts International85-12.
Subject:	Soil sciences. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31300015
ISBN:	9798382823560

Development of a Reduced-order Simulation Model for the Nonlinear Response Analysis of a Large-scale Laminar Soil Box Experimental System /
Ghimire, Pratibha,

Development of a Reduced-order Simulation Model for the Nonlinear Response Analysis of a Large-scale Laminar Soil Box Experimental System /Pratibha Ghimire. - 1 electronic resource (99 pages)

Source: Masters Abstracts International, Volume: 85-12.

The stability of major structures is influenced by the properties of the soil on which the structure is founded. During earthquake shaking, soil deforms and transfers the vibrations to the supported structure. Consequently, the structure is displaced, and induced forces are transferred back into the soil through the foundation. These forces will affect the displacement of the soil, which will, in turn, modify the structure's vibration. This two-way relationship between soil and structure is referred to as Soil-Structure Interaction (SSI) and is not comprehensively addressed by most structural design codes. However, past earthquakes have demonstrated that SSI effects can influence structural damage. Critical infrastructures such as nuclear plants, large buildings, bridges, underground pipes, and tunnels are more vulnerable, and SSI should be considered for their design. A comprehensive understanding of SSI effects must be informed by observations of actual system performance. However, field installations of sensors along with their data acquisition systems to obtain detailed data on SSI during extreme events is challenging. To overcome this challenge, researchers have been using shake tables to conduct SSI tests. This type of tests provides a method for investigating the coupled soil and structure system using representative earthquake ground motions under carefully controlled conditions. Shake table testing can provide substantial data to analyze the soil and structure behavior in the laboratory, which can inform future design methodologies.The University of Nevada, Reno, has recently developed a unique experimental capability by designing and commissioning the largest soil box in the nation along with its dedicated shake table. This experimental apparatus is capable of fully controlled large-scale experiments that can be used to study SSI in the laboratory under various soil conditions, structure types, and ground motions. The study described herein focuses on developing a reduced-order computational model and comparing its output to the experimentally collected data for the same laminar soil box experiment. A 1-D soil column was developed in SAP2000. The compacted soil in the soil box was represented as a 1-D Timoshenko beam model. This model can provide an essential and efficient tool for capturing the response of the soil box. The model was developed to represent the nonlinear response behavior of the soil box system through continuous updating of the model shear modulus and damping ratios based on the effective strain of the soil. Through comparison with soil box response data from carefully controlled soil box system commissioning tests, the reduced order model was demonstrated to be capable of capturing the dynamic behavior of the overall soil box, including both low-amplitude linear vibrations and high-amplitude nonlinear response.

English

ISBN: 9798382823560Subjects--Topical Terms:

2122699
Soil sciences.
Subjects--Index Terms:

Acceleration response spectrum

Development of a Reduced-order Simulation Model for the Nonlinear Response Analysis of a Large-scale Laminar Soil Box Experimental System /
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245 1 0 $a Development of a Reduced-order Simulation Model for the Nonlinear Response Analysis of a Large-scale Laminar Soil Box Experimental System / $c Pratibha Ghimire.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2024
300 $a 1 electronic resource (99 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Masters Abstracts International, Volume: 85-12.
500 $a Advisors: Elfass, Sherif Committee members: McCallen, David; Louie, John N.
502 $b M.S. $c University of Nevada, Reno $d 2024.
520 $a The stability of major structures is influenced by the properties of the soil on which the structure is founded. During earthquake shaking, soil deforms and transfers the vibrations to the supported structure. Consequently, the structure is displaced, and induced forces are transferred back into the soil through the foundation. These forces will affect the displacement of the soil, which will, in turn, modify the structure's vibration. This two-way relationship between soil and structure is referred to as Soil-Structure Interaction (SSI) and is not comprehensively addressed by most structural design codes. However, past earthquakes have demonstrated that SSI effects can influence structural damage. Critical infrastructures such as nuclear plants, large buildings, bridges, underground pipes, and tunnels are more vulnerable, and SSI should be considered for their design. A comprehensive understanding of SSI effects must be informed by observations of actual system performance. However, field installations of sensors along with their data acquisition systems to obtain detailed data on SSI during extreme events is challenging. To overcome this challenge, researchers have been using shake tables to conduct SSI tests. This type of tests provides a method for investigating the coupled soil and structure system using representative earthquake ground motions under carefully controlled conditions. Shake table testing can provide substantial data to analyze the soil and structure behavior in the laboratory, which can inform future design methodologies.The University of Nevada, Reno, has recently developed a unique experimental capability by designing and commissioning the largest soil box in the nation along with its dedicated shake table. This experimental apparatus is capable of fully controlled large-scale experiments that can be used to study SSI in the laboratory under various soil conditions, structure types, and ground motions. The study described herein focuses on developing a reduced-order computational model and comparing its output to the experimentally collected data for the same laminar soil box experiment. A 1-D soil column was developed in SAP2000. The compacted soil in the soil box was represented as a 1-D Timoshenko beam model. This model can provide an essential and efficient tool for capturing the response of the soil box. The model was developed to represent the nonlinear response behavior of the soil box system through continuous updating of the model shear modulus and damping ratios based on the effective strain of the soil. Through comparison with soil box response data from carefully controlled soil box system commissioning tests, the reduced order model was demonstrated to be capable of capturing the dynamic behavior of the overall soil box, including both low-amplitude linear vibrations and high-amplitude nonlinear response.
546 $a English
590 $a School code: 0139
650 4 $a Soil sciences. $3 2122699
650 4 $a Environmental engineering. $3 548583
653 $a Acceleration response spectrum
653 $a Laminar soil box
653 $a Nonlinear response analysis
653 $a Reduced order model
653 $a Shake table
653 $a Soil structure interaction
690 $a 0543
690 $a 0481
690 $a 0775
710 2 $a University of Nevada, Reno. $b Civil and Environmental Engineering. $e degree granting institution. $3 3830231
720 1 $a Elfass, Sherif $e degree supervisor.
773 0 $t Masters Abstracts International $g 85-12.
790 $a 0139
791 $a M.S.
792 $a 2024
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31300015