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روش رهایی پویا برای محاسبه بار کمانشی قابها | ||
نشریه مهندسی عمران و محیط زیست دانشگاه تبریز | ||
مقاله 7، دوره 49.3، شماره 96، آذر 1398، صفحه 65-74 اصل مقاله (803.95 K) | ||
نوع مقاله: مقاله کامل پژوهشی | ||
شناسه دیجیتال (DOI): 10.22034/ceej.2019.9679 | ||
نویسندگان | ||
جواد علامتیان* ؛ سید محمد حسینی نژاد گوشیک | ||
گروه مهندسی عمران، دانشکده مهندسی، دانشگاه آزاد اسلامی، واحد مشهد | ||
چکیده | ||
محاسبه بار کمانشی سازهها با شیوههای کلاسیک و بررسی دترمینان ماتریس سختی دشوار است. در این مقاله، روش رهایی پویای صریح برای تعیین بار کمانشی قابها به کار میرود. نخست، چگونگی محاسبه بار کمانشی با روشهای متداول بیان میشود. سپس، شیوه رهایی پویا و رابطههای آن معرفی میگردند. در ادامه، راهکار نوینی بر پایه نمودار بار- تغییر مکان روش رهایی پویا برای محاسبه نخستین بار کمانشی سازهها پیشنهاد میشود. برای نشان دادن توانایی شیوه پیشنهادی در محاسبه بار کمانشی، چندین سازه شامل ستونها و قابهای دو بعدی تحلیل غیرخطی هندسی میشوند. نتایج عددی کارایی مناسب شیوه رهایی پویا را در تعیین بار کمانشی نشان میدهد، به گونهای که کوچکترین بار کمانشی سازه به صورت ساده در دسترس قرار میگیرد. | ||
کلیدواژهها | ||
روش رهایی پویا؛ بار کمانش؛ عامل ساختگی؛ قاب؛ ضریب بار | ||
مراجع | ||
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