سازه سبز موقت از جنس بامبو: طراحی، تحلیل و ارزیابی آزمایشگاهی

اعلمی, جلال; امین افشار, مجید; آزاد مظلوم, عباس

doi:10.22065/jsce.2021.295485.2505

سازه سبز موقت از جنس بامبو: طراحی، تحلیل و ارزیابی آزمایشگاهی

نوع مقاله : علمی - پژوهشی

نویسندگان

¹ عضو هیئت علمی، گروه مهندسی سازه، دانشگاه افسری امام علی (ع)، تهران

² عضو هیئت علمی، دانشکده فنی و مهندسی، دانشگاه بین المللی امام خمینی (ره)

³ دانشکده فنی و مهندسی، دانشگاه بین المللی امام خمینی (ره)

10.22065/jsce.2021.295485.2505

چکیده

از مهمترین نیازهای اولیه آسیب دیدگان از حوادث طبیعی همچون سیل و زلزله، اسکان موقت در یک محیط امن و مناسب است. فرآیند پر هزینه و زمان‌بر ایجاد سکونت گاه دائمی، موجب تدارک اسکان موقت خواهد شد. با توجه به معایب مصالح رایج فولاد و بتن، نظیر برداشت غیر متعارف از معادن طبیعی، فرآیند پر هزینه و زمان‌بر ساخت و تولید و آسیب‌های زیست محیطی جبران ناپذیر، نیاز به ساخت سرپناه‌ موقت، سریع الاحداث، ارزان و سازگار محیط زیست از منابع طبیعی بومی قابل بازیافت، کم هزینه و تجزیه پذیر، نظیر بامبو در کشور عزیزمان بسیار احساس می‌شود. بامبو در بیش از 60 کشور دنیا به عنوان مصالح سازه‌ای به کار می‌رود و خوشبختانه گونه‌هایی از آن در کشور ما نیز یافت می‌شوند. هدف این پژوهش، بررسی خواص مکانیکی و کارآمدی سازه‌ای گونه‌ی بومی بامبو ایران با نام محلی کارا و طراحی و پیشنهاد یک سازه سبز موقت و مقاوم در برابر بارهای جانبی است. از مهاربند شورون به عنوان المان باربر جانبی در دو امتداد متعامد و از اتصالات بست شلنگی بهره گرفته شد. نتایج آزمایش‌های مقاومت فشاری، کششی، برشی، برشی همراه با بست شلنگی و خمشی این گیاه به ترتیب 5/66، 42/103، 63/2، 73/2 و 96/137 مگاپاسکال محاسبه شده‌اند. تقاضای محاسبه شده تحت تمام ترکیب بارها در عناصر ستون‌ها، تیرها و بادبندها برای تنش‌های خمشی و محوری بیش از 97% و برای تنش های برشی بیش از 57% نسبت به ظرفیت مجاز آیین نامه‌ کمتر شده‌اند. از این رو، ارزیابی این پژوهش نشانگر عملکرد مطلوب سازه پیشنهادی است.

کلیدواژه‌ها

موضوعات

تحلیل، طراحی و اجرای سازه های چوبی

عنوان مقاله [English]

Temporary Green Bamboo Structure: Design, Analysis and Experimental Assessment

نویسندگان [English]

Jalal Alami ¹
Majid Amin Afshar ²
Abbas Azad Mazloum ³

¹ Structural Engineering Department, Imam Ali Officer University, Tehran;

² Faculty of Technology and Engineering, International University of Imam Khomeini, Qazvin

³ Faculty of Technology and Engineering, International University of Imam Khomeini, Qazvin

چکیده [English]

One of the most important basic needs of the affected people after natural disasters such as floods and earthquakes is to live in a safe and suitable place. The costly and time-consuming process of establishing permanent housing will provide temporary residence. Using of the disadvantages of common materials, such as steel and concrete, due unconventional extractions, exorbitant construction and production costs, and irreparable environmental damages, the need to build temporary shelters, fast construction, recyclable, environmentally friendly, low-cost and biodegradable natural resources, like bamboo, is very much felt in our beloved country. Bamboo is used as a structural material in more than 60 countries in the world, which fortunately, its species can also be found in our country. The purpose of this study is to investigate the mechanical properties and structural efficiency of the native Iranian bamboo species with the local name Kara and also design and propose a temporary green structure resistant against lateral loads. The Chevron brace was used as a lateral bearing element and hose-clamp connections were also employed. The results of compression, tensile, shear, shear with hose-clamp, and bending test parallel to the fibers were calculated to be 66.5, 103.42, 2.63, 2.73, and 137.96 MPa, respectively. The results of the analysis and design of the constructed model also indicated that the calculated demand under all load combinations in the elements of columns, beams, and braces for bending and axial stresses was more than 97%, and for shear stresses was more than 57% lower than the allowable capacity of the regulations

کلیدواژه‌ها [English]

Bamboo plant
Mechanical properties
Designing
Analyzing
Temporary green structure

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