Design of innovative dynamic systems for seismic response mitigation
Name
813844640-MIT.pdf
Description
Full printable version
Size
15.84 MB
Format
Adobe PDF
Checksum (MD5)
b476188b86e8b87c218c8092d868800a
Author(s)
Seymour, Douglas (Douglas Benjamin)
Advisor(s)
Jerome J. Connor.
Date Issued
2012
Publisher
Massachusetts Institute of Technology
Abstract
Rocking wall systems consist of shear walls, laterally connected to a building, that are moment-released in their strong plane. Their purpose is to mitigate seismic structural response by constraining a building primarily to a linear fundamental mode. This constraint prevents mid-story failure, and maximizes energy dissipation by activating the maximum number of plastic hinges throughout the structure. This is a useful response mitigation system, but suffers from some difficulties, stemming primarily from the considerable mass of the wall. Those difficulties are notably expensive foundations, and very high inertial forces imparted to the building, with subsequent need for expensive lateral connectors. The purposes of this work are to analyze current implementations of rocking wall systems, present an early reference on their application, present the first systematic methodology for their design, clarify their analysis, and introduce an alternative structural system that avoids their difficulties. A quasi-static analysis model is used for predicting the seismic mitigation performance of rocking walls and rocking columns. The stiffness matrix is generalized for an N-story building equipped with these structural systems. The model presented enables optimization of the design parameters, and consequently improved system effectiveness, analytical tractability, and material usage. The case study is a rocking wall system installed in a building located in Tokyo, Japan. A software package is developed, providing an illustrative implementation of the methods derived.
Description
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2012.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 97-99).
Subjects
Civil and Environmental Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
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