This thesis examines the seismic internal retrofitting of existing deficient reinforced concrete
(RC) structures by using structural steel members. Both experimental and numerical studies
were performed. The strengthening methods utilized with the scope of this work are chevron
braces, internal steel frames (ISFs), X-braces and column with shear plate. For this purpose,
thirteen strengthened and two as built reference one bay one story portal frame specimens
having 1/3 scales were tested under constant gravity load and increasing cyclic lateral
displacement excursions. In addition, two ½ / scaled three bay-two story frame specimens
strengthened with chevron brace and ISF were tested by employing continuous pseudo
dynamic testing methods. The test results indicated that the cyclic performance of the Xbrace
and column with shear plate assemblage technique were unsatisfactory. On the other
hand, both chevron brace and ISF had acceptable cyclic performance and these two
techniques were found to be candidate solutions for seismic retrofitting of deficient RC
structures. The numerical simulations by conducting nonlinear static and dynamic analysis
were used to estimate performance limits of the RC frame and steel members. Suggested
strengthening approaches, chevron brace and ISF, were also employed to an existing five
story case study RC building to demonstrate the performance efficiency. Finally, design
approaches by using existing strengthening guidelines in Turkish Earthquake Code and
ASCE/SEI 41 (2007) documents were suggested.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12613450/index.pdf |
| Date | 01 June 2011 |
| Creators | Ozcelik, Ramazan |
| Contributors | Binici, Baris |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | Ph.D. Thesis |
| Format | text/pdf |
| Rights | Access forbidden for 1 year |
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