نوع مقاله : مقاله کامل پژوهشی
نویسندگان
1 کارشناس ارشد، دانشکده مهندسی عمران، دانشگاه صنعتی شاهرود
2 دانشکده مهندسی عمران، دانشگاه صنعتی شاهرود
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In structural engineering, reinforced concrete frame systems filled with masonry walls are known as "infilled frames." Studies have demonstrated that infills increase structural stiffness while reducing ductility. The interaction between masonry walls and the surrounding concrete frame fundamentally alters the system's behavioral characteristics. This interaction can either enhance seismic performance or exacerbate damage; it also significantly changes the effective stiffness and natural period of the structure. Field investigations following the Kermanshah earthquake (2017) revealed predominant in-plane failure mechanisms including diagonal cracking, local crushing in force transfer regions, and sliding along mortar joint interfaces. The Iranian Seismic Code (Standard 2800) emphasizes the separation of infills from frames to prevent this interaction.
This research utilized a comprehensive laboratory program designed to assess structural behavior under environmental loading conditions. The findings provide a foundation for developing analytical methods and design criteria for future studies. The experimental investigations were conducted using advanced equipment and precise measurement protocols to obtain reliable results for engineering criteria development. Three special reinforced concrete frames were constructed according to the Iranian National Building Code (Chapter 9) requirements. These reinforced concrete frames represent typical existing building structures. The innovation in this research lies in the phased construction of the reinforced concrete frames, accurately simulating the construction process of actual buildings. The gradual construction of the foundation, columns, and beams followed the sequence of construction operations in the building industry. Precise installation of strain gauges at 10 cm from column faces with multi-layered protection enabled accurate recording of structural behavior.
کلیدواژهها [English]
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