نوع مقاله : مقاله پژوهشی
نویسندگان
گروه مهندسی عمران، واحد مشهد، دانشگاه آزاد اسلامی، مشهد، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Over the recent decades, with spreading unusual events such as fire, blast, and vehicles collision, studying the behavior of structures subjected to abnormal loadings has been attracted the attention of researchers and structural engineers. Among the various scenarios of impact loads, the collision of light and heavy vehicles to the external column of steel buildings accidentally and or intentionally is important as a research and an applied topic. The impact loads caused by vehicle collisions to the column of buildings are usually not considered in the design, so it's necessary that the effect of these loads should be studied on the nonlinear performance of structures. In this study, the steel moment-resisting frame structures 2, 5, 8 and 12-story with intermediate ductility are designed for gravity and seismic loads and then nonlinear dynamic analyses are conducted under the impact induced by Light and heavy vehicles collision to corner column of side axis by OpenSees software and fragility curves are proposed based on the different damage levels. Finally, structural responses of studied frames are investigated and compared due to the collision impact with different velocities until the occurrence of dynamic instability. The results showed that the impact induced by light vehicle collision at velocities 80, 100, 140 and 130 km/h and impact induced by the heavy vehicle at velocities 50, 60, 80 and 70 km/h has been caused dynamic instability in the desired frames 2, 5, 8 and 12-story, respectively.
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