Electronic Theses and Dissertations

Identifier

6517

Author

Biraj Joshi

Date

2019

Date of Award

11-21-2019

Document Type

Thesis

Degree Name

Master of Science

Major

Civil Engineering

Concentration

Structural Engineering

Committee Chair

Charles Camp

Committee Member

Shahram Pezeshk

Committee Member

Roger Meier

Abstract

A shake table is a device used to simulate the seismic waves during an earthquake event and test the stability of the structure after an event. This table can be helpful in testing structural components or models. The primary objective of this study is to operate and verify the functionality of the shake table present at the Department of Civil Engineering’s structure research lab. The System Communication Software (SCSW), present at the University of Memphis’s Department of Civil Engineering lab, operates the shake table unidirectionally and requires ground motions to be uploaded to the software. Pacific Earthquake Engineering Research (PEER) provides strong ground motion data that was used to extract several ground motions for selection and scaling purposes for the study. As per ASCE 7-16, Chapter 16.2, non-linear response history analysis is applied to select and scale the motions. In addition to the ASCE provisions, the Spectral-Matching procedure in the frequency domain is practiced in scaling or matching of the ground motions for this study. The ground motions to be uploaded needs to be either load or displacement controlled. The extracted scaled ground motions as acceleration time histories are converted into displacement time histories and are uploaded to the SCSW software to control the shake table to displace. The scaled models are mounted on the shake table using bolted connections. Accelerometers are clamped on every story of the scaled model to measure the acceleration while being subjected to scaled ground motion. The data acquired from the accelerometers are raw, unprocessed, and thus need to be filtered for unwanted components or noise. The final processed and corrected accelerations are then compared with the output response at every story of all the scaled models from the 2D SAP2000 model for validation of the functionality of the shake table.

Comments

Data is provided by the student.

Library Comment

dissertation or thesis originally submitted to the local University of Memphis Electronic Theses & dissertation (ETD) Repository.

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