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    Bond behavior investigation of ordinary concrete-rebar with hinged beam test and eccentric pull-out test
    (Techno-Press, 2020) Arslan, Mehmet E.; Pul, Selim
    In this study, bond behavior of ordinary concrete and rebars with different diameters and development length was investigated by using Hinged Beam Test (HBT) and Eccentric Pull-Out Test (EPT) comparatively. For this purpose, three different rebar size and development length depending on rebar diameter were chosen as variables. Three specimens were produced for each series of specimens and totally 54 specimens were tested. At the end of the tests it was observed that obtained results for both tests were quite similar. On the other hand, increased bar size, especially for the specimen with 14 mm bar size and 14 development length (lb), caused shear failure of test specimens. This situation infers that when bigger bar size and lb are used in such test, dimensions of test specimens should be chosen bigger and stirrups should be used for producing of test specimens to obtain more adequate result by preventing shear failure. Also, a nonlinear regression analysis was employed between HBT and EPT results. There was a high correlation between the EPT values, lb, rebar diameters and estimated theoretical HBT. In addition, at the end of the study an equation was suggested to estimate bond strength for HBT by using EPT results.
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    Cyclic behaviors of different type of hollow brick infill walls: A hinged rigid frame approach
    (Elsevier Sci Ltd, 2019) Pul, Selim; Arslan, Mehmet Emin
    The main purpose of this study is to examine the behavior of the brick masonry and infill walls under cyclic horizontal loads, irrespective of reinforced concrete frames. For this purpose, the test walls, which are produced as non-plastered (plane), two side plastered and two side plastered and strengthened with zinc coated steel wire mesh by using vertical and horizontal hollow brick walls were tested in a rigid hinged steel loading frame under lateral cyclic loading. The findings were evaluated in terms of load carrying capacity, ductility and energy dissipation capacities. The tests carried out showed that the expected increases were provided any type of plastered walls in terms of stiffness with respect to the reference non-plastered walls. Besides this, wired mesh used in plastered walls increased significantly the ductility and consequently the energy dissipation capacity of the walls by maintaining wall integrity in an advanced stage of the loading. Also, both hollow brick and vertical brick infill walls strengthening with wired mesh increase load carrying capacity of the wall test specimens. Load carrying and energy dissipation capacities of wire meshed specimens almost five times more than those of plane test walls. (C) 2019 Elsevier Ltd. All rights reserved.