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THREE DIMENSIONAL RESPONSES OF A STEEL STRUCTURE
UNDER BLAST LOADS
by
Young Seo Hwang
A Dissertation Presented to the
FACULTY OF THE USC GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(CIVIL ENGINEERING)
December 2010
Copyright 2010 Young Seo Hwang
Object Description
| Title | Three dimensional responses of a steel structure under blast loads |
| Author | Hwang, Young Seo |
| Author email | yhwang@usc.edu; ox0525@gmail.com |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Civil Engineering |
| School | Viterbi School of Engineering |
| Date defended/completed | 2010-12 |
| Date submitted | 2010 |
| Restricted until | Unrestricted |
| Date published | 2010-11-24 |
| Advisor (committee chair) | Anderson, James C. |
| Advisor (committee member) |
Wong, Hung Leung Wang, Chunming |
| Abstract | The use of vehicle bombs by terrorists to attack building structures has become of increasing concern to structural engineers since the bombing of the marine barracks in Beriut (1982). This is particularly true following attacks on the Murrah building (1995). Due to increasing threat of vehicle bomb attack, structural engineers have developed methods of design and analysis to protect against blast loads. However, the behavior of structures under blast loads is difficult to understand. Current design for air blast loads generally uses simplified analysis procedures that were developed in the late 1950's [19]. More recent modeling and computation capabilities can readily be used to provide a more exact estimate of the structural behavior under these extreme loads. It has been suggested that buildings designed for strong ground motions will also have improved resistance to air blast loads. As an initial attempt to quantify this behavior, the responses of a three story and ten story steel building, designed for the 1994 building code, with lateral resistance provided by perimeter moment frames, are considered. An analytical model of the building is developed and the magnitude and distribution of blast loads on the structure are estimated using available computer software that is based on empirical methods.; To obtain the relationship between pressure, time duration, and standoff distance, these programs are used to obtain an accurate model of the air blast loading. A hemispherical surface burst for various explosive weights and standoff distances is considered for generating the air blast loading and determining the structural responses. Linear and nonlinear analyses are conducted for these loadings. Air blast demands on the structure are compared to current seismic guidelines. These studies present the displacement responses, story drifts, demand/capacity ratio, diaphragm analysis and inelastic demands for these structures. |
| Keyword | air blast; demand/capacity ratio; dynamic responses; earthquake; plastic hinge; story drift |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m3562 |
| Contributing entity | University of Southern California |
| Rights | Hwang, Young Seo |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | cisadmin@lib.usc.edu |
| Filename | etd-Hwang-4168 |
| Archival file | uscthesesreloadpub_Volume44/etd-Hwang-4168.pdf |
Description
| Title | Page 1 |
| Contributing entity | University of Southern California |
| Repository email | cisadmin@lib.usc.edu |
| Full text | THREE DIMENSIONAL RESPONSES OF A STEEL STRUCTURE UNDER BLAST LOADS by Young Seo Hwang A Dissertation Presented to the FACULTY OF THE USC GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (CIVIL ENGINEERING) December 2010 Copyright 2010 Young Seo Hwang |
