| Abstrakt: |
Infill walls are realized to affect the nonlinear response of infilled frames. Yet, due to modeling and analysis complexities, infill walls are usually neglected in the modeling and analysis phase. In this paper, the nonlinear behavior of infilled steel braced frames is investigated using the Endurance Time (ET) method. The ET method is a novel and straightforward approach for the nonlinear analysis of structures under dynamic excitations. Two 2D braced frames, one concentrically braced frame and one eccentrically braced frame, with unreinforced masonry clay brick walls as infills, are considered. The infill panels are macro-modeled using equivalent compressive struts, with appropriate hysteretic behavior models assigned. Results of ET and Incremental Dynamic Analysis (IDA) nonlinear analyses are discussed and compared to observe the ET method’s potential benefits and drawbacks in seismic evaluation of this category of frames. The analyses show that ET results well match those of IDA at various intensity levels, yet discrepancy increases at high levels of nonlinear behavior. |
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