Seismic performance assessment of wide beam infill joist block frame structures in Turkey

Karaaslan, Enes
Wide-beam frame buildings are prevalent in Turkey since 1980’s due to their advantageous characteristics such as ease of construction, construction speed and cost efficiency. However; according to recent experimental studies, wide beam systems demonstrate poor energy dissipation capacity under earthquake. The capacities of the wide-beams may not fully developed at the beam-column joints. The beam reinforcements that do not anchor to the core area of the columns may not reach their full capacities unless special measures are taken. The goal of this thesis is to simulate the behavior of wide beam buildings under earthquake excitation through the earthquake simulation software OpenSees (Open System for Earthquake Simulation). The software occupies Modified Ibarra-Krawinkler Deterioration Model in order to model the hysteresis behavior of interior and exterior wide-beam connections. The hysteresis cycles of several experimental studies are calibrated through a procedure developed based on Haselton’s calibration equations. Later this calibration is implemented to the simulation of a wide-beam building model and a vulnerability study is carried out. The deformation limits of Immediate Occupancy (IO), Life Safety (LS) and Collapse Prevention (CP) are first identified through a pushover analysis. Later, a set of earthquake data is used in consecutive time history analyses and the maximum inter-story drift ratios are recorded for each ground-motion input. Finally, a set of fragility curves are produced for different types of ground motion parameters. The results are compared with the results of typical conventional moment frames and flat slab buildings.


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Multi-story reinforced concrete tunnel form buildings are one of the common structural types in regions prone to high seismic risk due to the buildings inherent earthquake resistance and ease of construction. Despite their good performance during earthquakes in 1999 in Turkey, and abundance of such structures scattered worldwide, current seismic codes and design provisions provide insufficient guidelines for their seismic design. As a compensatory measure, a series of modal and nonlinear static analyses are...
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Although it is a known fact that confined masonry construction has many advantages over unreinforced masonry construction, its application has been very limited in Turkish construction practice. One of the reasons for this issue is that the seismic regulations in Turkey do not explicitly enforce or even encourage the use of confined masonry structural systems. Now, being on the verge of releasing a new version of the Turkish seismic code, it seems to be an appropriate time to adapt confined ma-sonry to the ...
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Reinforced concrete frame buildings are the most common type of constructions in Turkey which are exposed to various types of forces during their lifetime. Seismic performance of reinforced concrete frame buildings is dominated by columns which can be classified as primary members of these structures. When current codes are considered, all of them contain several provisions in order to implement reliable seismic performances of reinforced concrete columns. In order to evaluate the accuracy of these provisio...
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In addition to high seismicity, poor construction quality, incorrect detailing and structural mistakes in Turkey have caused enormous loss of life and property. Therefore, seismic rehabilitation has been a major topic for civil engineers in Turkey. The object of this research is to develop a simple method that will provide strengthening of buildings without evacuating the inhabitants. This study is based on application of steel-fibre-reinforced mortar on masonry infill walls with the aim of converting nonst...
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A large number of joints are developed as a result of various timber construction techniques, structural efficiency and cultural differences. Many joints are not used because they are not adapted or are inconvenient for modern manufacturing and construction technologies. Nonetheless, this construction heritage can be harnessed and adjusted for contemporary use. Significant cultural and social differences in timber jointing and construction technologies are reviewed. The Geometric Breakdown Method is develop...
Citation Formats
E. Karaaslan, “Seismic performance assessment of wide beam infill joist block frame structures in Turkey,” M.S. - Master of Science, Middle East Technical University, 2015.