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پیش بینی خواص مکانیکی بتن سبک مسلح به الیاف بازالت حاوی دوده سیلیس و خاکستر بادی با سیستم استنتاج عصبی- فازی سازگار | ||
نشریه مهندسی عمران و محیط زیست دانشگاه تبریز | ||
مقاله 7، دوره 52.4، شماره 109، بهمن 1401، صفحه 75-89 اصل مقاله (1.68 M) | ||
نوع مقاله: مقاله کامل پژوهشی | ||
شناسه دیجیتال (DOI): 10.22034/jcee.2021.39150.1933 | ||
نویسندگان | ||
سید حسین قاسم زاده موسوی نژاد* 1؛ فرزاد جوهری مجد2؛ اشکان سرادار2 | ||
1گروه مهندسی عمران، دانشکده فنی، دانشگاه گیلان، رشت | ||
2گروه مهندسی عمران، مؤسسه آموزش عالی کادوس، رشت | ||
چکیده | ||
بتن به عنوان یک ماده ساختمانی دارای مزایا و معایبی است. ازجمله معایب بتن، مقاومت و کرنش کششی بسیار کم و ترد بودن آن تحت بارگذاری خمشی یا فشاری است که این رفتار شکننده، موجب شکست ناگهانی سازههای بتنی هنگام زلزله میگردد. از سویی مقاومت کم سبکدانه ها و شکنندگی این مصالح موجب بروز عملکرد ضعیفتر بتنهای سبک در مقابل شکلپذیری میشود. در همین راستا، در این تحقیق به بررسی خصوصیات مکانیکی بتن سبک سازهای حاوی لیکا (Leca) و مقادیر مختلف الیاف بازالت (Basalt) (0 تا 5/0درصد) پرداخته شد. همچنین از مواد پوزولانی دوده سیلیس و خاکستر بادی بهمنظور اصلاح برخی خواص بتن در مخلوط های بتنی سبک به عنوان جایگزین بخشی از وزن سیمان استفاده شد. در مجموع 21 طرح اختلاط ساخته شده و خواص تازه و سخت شده آن در سنین مختلف 7 و 28 و 90 روزه تحت آزمایش قرار گرفت. نتایج حاصل از آزمایش ها نشان میدهد حضور الیاف بازالت موجب کاهش اسلامپ و مقاومت فشاری به ترتیب تا 37 و 13 درصد میشود. با این حال تمامی مخلوط ها دارای کیفیت در رده "خوب" و از نظر مقاومتی در گروه "بتن سازهای" قرار گرفته اند. همچنین افزودن الیاف موجب بهبود مقاومت های کششی و خمشی و نیز جمع شدگی شد. از سویی دیگر، به منظور پیش بینی نتایج تجربی از سیستم استنتاج عصبی- فازی سازگار، ANFIS (Adaptive Neuro-Fuzzy Inference System) به عنوان روشی مطمئن در ارزیابی و تخمین نتایج استفاده گردید که نتایج تحلیل عددی آن بیانگر برآورد دقیق نتایج تجربی بود. | ||
کلیدواژهها | ||
بتن سبک؛ الیاف بازالت؛ دوده سیلیس؛ خاکستر بادی؛ خواص مکانیکی؛ سیستم استنتاج عصبی- فازی سازگار | ||
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مراجع | ||
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