Seismic Performance of Flexural Controlled Src Composite Columns in Existing Buildings


Abstract eng:
This paper addresses experimentally the cyclic performance of older-type steel reinforced concrete (SRC) columns that resemble existing buildings and bridges of pre 1980s construction; prior to enforcing seismic details. Two flexural controlled test specimens representing exterior columns modeled based on a typical seismic design of a 20-story prototype gravity-designed existing building are constructed and tested under quasi-static cyclic loading with different axial compression load levels. The tested columns include non-seismic widely spaced hoops with 90 degree hooks; thus the columns are considered flexure and confinement deficient. Test parameters include target failure mode and axial load ratio. The tests aim to quantify existing SRC columns seismic strength and deformability along with a preliminary attempt to establish backbone curve recommendations. From performance-based engineering demand viewpoint, the results show very satisfactory drift capacity associated with low axial load ratio indicating no need for retrofit and limited drift capacity and early strength loss and stiffness degradation under high axial load ratio suggesting the need for retrofitting existing SRC flexural columns with high axial loads.

Contributors:
Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 2214.:
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