Abstract
Masonry infilled walls are widely used in reinforced concrete (RC) frams worldwide. However, infilled RC frame building failure is a common mode in destructive earthquakes. Further researcher is needed to bring insightful understandings into the behaviors of these structures. Therefore, this study investigates seismic parameters, ultimate tensile damage, and force transfer mechanisms in a reinforced concrete structure under in-plan load. For this purpose, the definitions and the relevant literature were reviewed. Then, an analytical software supporting an infill model was selected and described altogether with a particular modeling approach. Calibrating software results with those presented by Abdulhafez et al. (2014), the researchers designed a series of planer one-story one-bay reinforced concrete frames upon ACI 318M-14 Building Code. The seismic behavior of infilled frames were also studied using finite element method. Force transfer mechanisms in infilled frame with opening, which is one of the important items, was investigated in this study. Comparing the analysis outcomes with the bar frame, it was indicated that the ultimate load, stiffness, and toughness of the full in-filled frame were increased while the ductility was decreased. It was also revealed that the presence of opening in infilled frame decreased the ultimate load, stiffness and toughness corresponding full infilled frame. In addition, the increasing of opening size increased the reduction of the ultimate load, stiffness and toughness.
Highlights
An established body of research has investigated the seismic behavior of reinforced concrete (RC) frames under earthquake excitation
The results showed that the infill walls crucially affected the seismic behavior of RC frames
The results of finite element model analysis (FEA) and the results of the experimental test are compared (Fig. 6(b) and Fig. 6(d)., Load-displacement behavior and ultimate tensile damage, which were constructed from the finite element method (FEM), were compared with the corresponding ones from experimental testing in order to assess the adequacy of the finite element analysis (FEA) in estimating the response of masonry infilled frames
Summary
An established body of research has investigated the seismic behavior of RC frames under earthquake excitation. Kiani et al used three lateral load systems including, masonry infill walls, concentric braces, and a combination of concentric bracings and a combination of concentric braced frames with masonry infill walls in order to investigate the seismic behavior and vulnerability assessment of steel structures in three - and five-story steel structures These researchers utilized OpenSees software for numerical modeling and structural analyses. Tawfik Essa et al, (2013) [9] further investigated the effect of masonry infill wall on the performance of high strength RC frames They conducted experiments on four half-scale, single-story single-bay under cyclic loading. Baran and Sevil (2010) [12] tested three 1/3 scale one-story one-bay and five 1/3 scale two-story one-bay masonry infilled RC frames by changing axial load on columns, lap-splicing and mortar strength They observed that the ultimate resistance and stiffness of the infilled RC frames increased in comparison to bare frames
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