انتخاب صفحه

بیست و دومین همایش سالیانه انجمن بین المللی بتن (ACI)– شاخه ایران

آیین نامه مسابقات ملی دانشجویی بتن شاخه های منطقه ه­ای (ACI)

مسابقه کامپوزیت های FRP

ایران- تهران 4 و 5  دی ماه 1398

با همکاری وزارت علوم، تحقیقات و فناوری

مجری:

علاقمندان می توانند جهت ثبت نام و کسب اطلاعات بیشتر به پایگاه اینترنتی
www.aciiranchapter.org مراجعه کرده و یا با شماره تلفن 88664151 تماس حاصل نمایند.
دانشجویان علاوه بر سایت های انجمن می توانند تمامی آئین نامه های مسابقات دانشجویی و فرم ثبت نام را از کانال تلگرام انجمن دانلود نمایند.تلگرام انجمن بین المللی بتن ACI

ACI FRP Composites Competition
Objectives
:These are the challenges in this competition

Design, construct, and test a concrete structure reinforced with fiber-reinforced polymer (FRP) reinforcement to achieve the lowest cost-load ratio. Cost is defined as the calculated batch cost for concrete materials and chemical admixtures plus the cost of the FRP used to reinforce the structure; adjusted for forming costs for more complicated geometries and reduced by credits given for implementation of sustainable design concepts.

Predict the ultimate load.

Predict the load that will result in a piston deflection of 3.5 mm (0.14 in.).

Prizes

First, Second, and Third place entries will each be awarded a certificate of recognition, will be recognized in ACI Iran Chapter’s newsletter if space allows, and will be recognized on ACI’s Iran Chapter website at www.aciiranchapter.org.

Rules

1.Eligibility

The rules of eligibility have been translated to Persian and attached to this document. See attachment A.

Each competition has separate and different requirements and rules of eligibility, so participants in the student competitions should read each document carefully.

 

برای دریافت نسخه PDF آیین نامه مسابقه  کامپوزیت های FRP اینجا کلیک کنید.

    مشاهده ادامه آیین نامه

2. THE MATERIALS AND THE STRUCTURE GEOMETRY

2.1. Structure Type: A structure will be classified as a TYPE 1 structure if it is a straight prismatic beam; that is, its cross section is prismatic and the centroid of the cross section (based on the gross concrete cross section) does not vary along the span. A TYPE 1 structure may have a rectangular or non-rectangular cross section; however, if the cross section is non-rectangular then a Complex Formwork cost adjustment will be applied as specified in Paragraph 4.3. Any structure that does not meet the requirements for TYPE 1 will be designated as a TYPE 2 structure. Any TYPE 2 structure that is non-rectangular in cross section and or nonprismatic along the span will have a Complex Formwork cost adjustment applied as specified in paragraph 4.3. Examples of TYPE 1 and TYPE 2 structures are shown in the Structure Geometry Requirements Diagram.

2.2. Structure Size: Regardless of whether the structure is classified as TYPE 1 or TYPE 2, the structure must fit into a 200 mm (7.87 in.) wide by 200 mm (7.87 in.) high by 1000 mm (39.4 in.) long box. The structure’s overall length may not be less than 950 mm (37.4 in.) nor more than 1000 mm (39.4 in.), including any protruding reinforcement. The structure must be able to be placed on supports and loaded as shown in the Structure Geometry Requirements Diagram.

2.3. Structure Markings: At the center of the structure, a large “X” shall be painted on the upper surface where the concentrated load will be applied. In addition, student teams must select an identification mark (for example, the school initials followed by the numeral 1 for team #1 or 2 for team #2), which must be marked so as to be clearly visible on both sides of the structure. Teams may also apply decals of their school logo and/or decorate their entry with felt-tip markers to improve its appearance, if desired. No other markings or surface treatment shall be permitted.

2.4. Structure Weight: Total structure weight must be between 5 kg (11.0 lb) and 15 kg (33.1 lb).

2.5. Structure Materials

2.5.1. Use only materials listed in the Official Mix and Cost worksheet.

2.5.2. The cementitious materials shall consist of any combination of portland cement meeting ASTM C150, or blended cement meeting ASTM C595 or ASTM C1157. Supplementary cementitious materials that may also be used include slag cement (“slag”) meeting ASTM C989, fly ash meeting ASTM C618, and/or silica fume meeting ASTM C1240.

2.5.3. Any type of nonmetallic aggregate may be used.

2.5.4. Chemical admixtures meeting ASTM C260, C494, or C1017 are allowed. Epoxies and other polymers, glue, and binders may NOT be used.

2.5.5. Teams must provide the measured weights of all materials used in the concrete batch prepared to cast their competition structure, as specified on the Official Mix and Cost Form.

2.5.6. A student team may use any combination of the FRP reinforcing materials supplied for the competition in their structure, but the competition structure must be fabricated with at least one (1) full piece of the FRP reinforcing materials supplied for the competition. The FRP reinforcing material may be cut in any manner. The FRP reinforcing materials may not be prestressed. Mechanical anchorages, if used, must be made from the FRP reinforcing materials supplied for the competition.

2.6. Structure Construction:

2.6.1. Curing shall be at atmospheric pressure, and the curing temperature must not exceed the boiling point of water at atmospheric temperature.

2.6.2. No structure shall be more than 56 days old at the time of the test.

2.6.3. Reinforcing support wires and/or chairs are not permitted in the 850 mm clear span. Any manner of bar support may be used outside the clear span, as long as the bar support does not act to enhance the behavior of the structure, such as by anchoring the bar in the concrete; these bar supports are NOT included in the total cost. Mechanical anchorages, if used, must be made from the materials provided, as specified in paragraph 2.5.7 and ARE included in the total cost.

2.7. Submissions:

2.7.1. Teams must submit a 75 x 150 mm (3 x 6 in.) cylinder placed from the same concrete batch as that used to place the competition structure. The cylinder MUST be identified with the same structure identification mark and MUST be submitted with the structure on the day of the competition. The cylinder will be used by ACI as required by the judges to confirm materials used. Teams failing to submit the required cylinder will be disqualified from the competition.

2.7.2. Teams must also provide a diagram showing placement and dimensions of all FRP reinforcing materials used. The diagram must include the structure identification mark and must be submitted along with the Official Mix and Cost Form by the date specified on the competition website. Teams are encouraged to prepare an 11 x 17 in. poster with their school name and logo, their structure identification mark, and the names of student team members and faculty advisor to be displayed with their structure at the competition.

2.7.3. Entries not meeting the specified requirements may be tested if time permits but will not be eligible for prizes. MODIFICATION OF ENTRIES SHALL NOT BE PERMITTED AT THE COMPETITION SITE.

3. THE TESTING PROCESS:

3.1. Entries will be weighed and measured, and those judged acceptable by the FRP Competition Committee will be positioned in the testing apparatus, which will apply a midspan concentrated load by means of a pivoting load plate. The center-to-center span is 900 mm (35.4 in.) and reaction forces are through bearing surfaces measuring not less than 50 mm (2 sq in.) by 50 mm (2 sq in.) and providing no restraint against rotation at the ends of the structure.

3.2. Once seated in the testing apparatus, a seating load of approximately 0.25 kN (56 lb) will be applied and recorded. Additional load will be applied until the structure fails or is loaded to the test fixture’s capacity of 67 kN (15,000 lb). In lieu of obvious physical signs of failure, after initial cracking, failure will be assumed to have occurred when total load on the structure has decreased to 75% of the maximum load achieved by that structure. The loading rate will be determined by adjusting the cylinder’s manual speed setting so that the manual speed valve is closed hand-tight. This setting will correspond to a piston movement of approximately 2.5 mm/minute, but may be affected by the stiffness of the structure. Deflection will be measured as the movement of the loading piston, which is assumed to correspond to deflection of the structure at the loading plate.

3.3. The maximum load achieved (Pult) will be recorded as the maximum load prior to failure or 67 kN (15,000 lb), whichever is smaller, without deduction of the seating load.

3.4. The load corresponding to a deflection of 3.5 mm (0.14 in.) will also be recorded. To arrive at the load corresponding to this deflection (P3.5), the measured load will be reduced by the 0.25 kN (56 lb) seating load (for which no deflection was measured). If a structure fails to reach a deflection of 3.5 mm (0.14 in.) prior to failing or reaching the test fixture’s capacity of 67 kN (15,000 lb), (P3.5) will be taken as the maximum load achieved (as specified in Paragraph 3.3) less the seating load of 0.25 kN (56 lb).

4. STRUCTURE COST:

4.1. The Final Cost (COST) will be calculated as the sum of the material cost for the individual materials used to produce each entry times the Complex Formwork and Sustainability Credit Multipliers, as specified in the Official Mix and Cost Worksheet.

4.2. The cost for FRP reinforcing materials will be calculated on a per-piece basis and will NOT be prorated when less than the full piece of an FRP reinforcement is used. (For example, an entry that uses one complete piece of FRP reinforcement as required by Paragraph 2.5.7 and a part of another piece of FRP reinforcement as permitted by Paragraph 2.5.7 would be assigned the material cost associated with two full pieces of FRP reinforcing materials.)

4.3. Complex Formwork Multipliers will be assigned to account for the additional costs of more involved cross sections. Complex Formwork Multipliers will be applied to only the concrete material costs. Multipliers will be assigned for the following geometries:

4.3.1. If the cross section is nonrectangular, a multiplier of 1.1 will be applied to the concrete material costs;

4.3.2. If the cross section is nonprismatic (i.e. varies in the clear span), a multiplier of 1.1 will be applied to the concrete material costs;

4.4. Sustainability credits will be granted for reduction in cement content and for use of recycled supplementary cementitious materials (SCMs). The Sustainability Credit Multiplier will be applied to both the concrete and the FRP material costs. The Sustainability Credit Multiplier will be calculated by subtracting the sum of the sustainability credits awarded from 100%. Sustainability Credits will be awarded for implementation of the following sustainable design concepts:

4.4.1. If the measured batch weight of cement (in lb or kg) is less than 15% of the total batch weight (in lb or kg) of all concrete materials, as reported on the Mix and Cost Form worksheet, a 1% sustainability credit will be awarded;

4.4.2. If the measured batch weight of cement (in lb or kg) is less than 10% of the total batch weight (in lb or kg) of all concrete materials, as reported on the Mix and Cost Form worksheet, an additional 1% sustainability credit will be awarded;

4.4.3. If the measured batch weight of cement (in lb or kg) is less than 5% of the total batch weight (in lb or kg) of all concrete materials, as reported on the Mix and Cost Form worksheet, an additional 1% sustainability credit will be awarded;

4.4.4. If the measured batch weight (in lb or kg) of fly ash is more than 20% of the sum of the measured batch weights (in lb or kg) of all cementitious materials (including cement, fly ash, slag cement [slag], and silica fume), as reported on the Mix and Cost Form worksheet, a 1% sustainability credit will be awarded;

4.4.5. If the measured batch weight (in lb or kg) of fly ash is more than 30% of the sum of the measured batch weights (in lb or kg) of all cementitious materials (including cement, fly ash, slag, and silica fume), as reported on the Mix and Cost Form worksheet, an additional 1% sustainability credit will be awarded;

4.4.6. If the measured batch weight (in lb or kg) of fly ash is more than 40% of the sum of the measured batch weights (in lb or kg) of all cementitious materials (including cement, fly ash, slag, and silica fume), as reported on the Mix and Cost Form worksheet, an additional 1% sustainability credit will be awarded;

4.4.7. If the measured batch weight (in lb or kg) of slag cement (slag) is more than 20% of the sum of the measured batch weights (in lb or kg) of all cementitious materials (including cement, fly ash, slag, and silica fume), as reported on the Mix and Cost Form worksheet, a 1% sustainability credit will be awarded;

4.4.8. If the measured batch weight (in lb or kg) of slag is more than 35% of the sum of the measured batch weights (in lb or kg) of all cementitious materials (including cement, fly ash, slag, and silica fume), as reported on the Mix and Cost Form worksheet, an additional 1% sustainability credit will be awarded;

4.4.9. If the measured batch weight (in lb or kg) of slag is more than 50% of the sum of the measured batch weights (in lb or kg) of all cementitious materials (including cement, fly ash, slag, and silica fume), as reported on the Mix and Cost Form worksheet, an additional 1% sustainability credit will be awarded;

4.4.10. If the measured batch weight (in lb or kg) of silica fume is more than 5% of the sum of the measured batch weights (in lb or kg) of all cementitious materials (including cement, fly ash, slag, and silica fume), as reported on the Mix and Cost Form worksheet, a 1% sustainability credit will be awarded;

4.4.11. If the measured batch weight (in lb or kg) of silica fume is more than 10% of the sum of the measured batch weights (in lb or kg) of all cementitious materials (including cement, fly ash, slag, and silica fume), as reported on the Mix and Cost Form worksheet, an additional 1% sustainability credit will be awarded.

5. THE EVALUATION PROCESS:

5.1. The Cost-Load Ratio (R1) will be calculated as the Final Cost of the structure, as defined in Paragraph 4, divided by the maximum load achieved (Pult), as defined in Paragraph 3.3.

R1 = COST / Pult,measured

5.2. The Maximum Load Prediction Ratio (R2) will be calculated as the absolute value of the percent difference between predicted and measured values for Pult as follows:

R2 = 100%*ABS[(Pult,predicted – Pult,measured) / Pult,measured]

5.3. The 3.5 mm Deflection Load Prediction Ratio (R3) will be calculated as the absolute value of the percent difference between predicted and measured values for P3.5 as follows:

R3 = 100%*ABS[(P3.5,predicted – P3.5,measured) / P3.5,measured]

5.4. Teams will be ranked in ascending order in each of three categories based on the Ratios defined in paragraphs 5.1 to 5.3. For example, the team with the lowest Cost-Load Ratio will be ranked 1, the team with the second-lowest ratio will be ranked 2, etc. Teams will be ranked separately in each structure type category (TYPE 1 and TYPE 2) for each of the three ratios.

5.5. A team’s final ranking points will be determined by multiplying its ranking in the Cost-Load Ratio by 0.50 and the ranking in each of the other two categories by 0.25. For example, a team finishing third in the Cost-Load Ratio, second in the Maximum Load Prediction Ratio, and seventh in the 3.5 mm Deflection Load Prediction Ratio would receive 3.75 ranking points, computed as follows: [(0.50*3)+(0.25*2)+(0.25*7)=3.75]. Ties will be broken by the ranking in the Cost-Load Ratio category.

5.6. Within each structure type category (TYPE 1 and TYPE 2), the team with the lowest final ranking points will be declared the winner, and all other groups will be ranked based on final ranking points in ascending order. Each school shall be eligible for only one prize in each structure type category.

6. TIME AND LOCATION FOR TESTING AND COMPLIANCE WITH RULES:

6.1. The competition will be held in conjunction with The current Concrete Convention and Exposition in Tehran, Iran on December 21, 2018 beginning at 09:00 a.m. All entries must be delivered to the competition area in person, expected to begin at or before 08:00 a.m. the morning of the competition. The entry does not have to be delivered by a team member. The check-in time and requirements may change depending on the total quantity of teams registered for the competitiom.

6.2. A panel of judges will be appointed by the ACI Iran Chapter. Interpretations and decisions made by the judges will be final, and appeals will not be considered. ACI reserves the right to perform a detailed examination and check all entries for compliance with the competition rules. Due to the complexity of this task, the examination may be done after the competition, if needed. If the examination shows that a team did not follow the rules, the team, their advisor, and all of his/her teams will be disqualified. ACI Iran Chapter will further document recommendations to disallow the team, their advisor, and/or school/university from participation in future ACI competitions and submit this to the Student and Young Professional Activities Committee.

7. Contact Information

American Concrete Institute – Iran Chapter

Unit 1, No.1, Layli St.,Vanak Ave., Vanak Sq., Tehran, Iran

Phone +9821 88664151 +9821 88664152

E-mail: Convention@aciiranchapter.org

___________________

Attachment A:

Eligibility Rules

1- قوانین مسابقه:
تیم های شرکت کننده در مسابقه :
1-1 اعضاي تيم ها، دانش آموزان دبيرستانها، هنرجويان هنرستانهاي فني و حرفه اي، دانشجويان دانشگاه های سراسری، آزاد و موسسات آمورش عالی(مقطع کارشناسی مهندسی عمران ، مکانیک، معدن، معماری، مهندسی شیمی و … در تمامی گرایش ها)، مراکز آموزش عالي، مراكز تحقيقاتي پژوهشي دولتي و غير دولتي می باشند. لازم به ذکر است تعداد تیم های شرکت کننده از هر دانشگاه، موسسه آموزش عالی، دبیرستان، هنرستان و … نامحدود و در هر گرایش می توانند حداکثر دو تیم داشته باشند که باید اعضای تیم ها متفاوت باشند.

2-1 مثال:
تیم A از دانشگاه A جهت مسابقه Epd و Cube (استاد راهنما:A و اعضای گروه: 1و 2 و 3 و 4 و 5 و 6 و 7 و 8)
تیم B از دانشگاه A جهت مسابقه Epd و Cube (استاد راهنما:A و اعضای گروه: 9 و 10 و 11 و 12 و 13 و 14 و 15 و 16)
تیم C از دانشگاه A جهت مسابقه Bowling و پل کاغذی (استاد راهنما:B و اعضای گروه: 17 و 18 و 19و 20 و 21 و 22 و 23 و 24)
توجه : تیم C از دانشگاه A اجازه شرکت در مسابقات Cube و Epd را نخواهد داشت.

3-1 این شرایط برای تمامی مسابقات غیر از مسابقه طرح پژوهشی، مسابقه کانو بتنی و مسابقه هنر بتنی صادق می باشد.
4-1 چنانچه تعداد تیم های شرکت کننده در هر گرایش به حداقل 4 تیم برسد مسابقه برگزار می شود در غیر اینصورت مسابقه آن گرایش برگزار نخواهد شد و نمونه تحویل گرفته شده به تیم های ثبت نام کننده عودت داده نمی شود.
5-1 هرتیم شامل حداقل 2 نفر و حداکثر 8 نفر عضو به همراه 1 نفر استاد راهنما از همان موسسه آموزش عالی، دبیرستان، هنرستان و … می باشد.
6-1 هر شخص تنها مي تواند در يك تیم عضويت داشته و تیم شرکت کننده می باید معرفی نامه مهمور به مهر از موسسه آموزش عالی، دبیرستان، هنرستان و … معرفی شده را ارائه دهد.
7-1 هر موسسه آموزش عالی، دبیرستان، هنرستان و… برنده حداکثر یک رتبه ( مقام ) خواهد بود.
8-1 استاد راهنما فقط مسئوليت هدايت اعضاي تيم و رعايت قوانين مسابقه از طرف تيم را بر عهده دارد .
9-1 هر استاد راهنما نمي تواند سرپرستي بیش از دو تیم از یک دبیرستان، هنرستان، موسسه آموزش عالی و … بر عهده بگيرد.
10-1 فرم های ثبت نام از طریق ایمیل یا فکس می بایست ارسال گردد، شرکت کنندگان فرم ثبت نام را می بایست از وب سایت www.aciiranchpter.org دانلود و تکمیل نموده، به همراه مدارک خواسته شده شامل(معرفی نامه برروی سربرگ دانشگاه، کارت دانشجویی معتبر، کارت ملی، فیش واریزی ثبت نام) به دبیر خانه همایش از طریق ایمیل به آدرس convention@aciiranchapter.org و یا از طریق فکس به شماره 88797454 ارسال نمایند.
11-1 نمونه های تحویل داده شده به کمیته مسابقات برای شرکت درمسابقات توسط تیم های شرکت کننده عودت داده نمی شود.
12-1 هزینه واریزی جهت ثبت نام به هیچ عنوان عودت داده نمی شود.
13-1 استاد راهنما باید از اعضای هیات علمی و یا مدرسین دانشگاه تیم دانشجویی مربوطه باشد .
14-1 حضور استاد راهنما در روز مسابقه و زمان برگزاری مسابقه تیم خود الزامی است و عدم حضور باعث حذف تیم دانشجویی می شود.
15-1 همراه داشتن اصل معرفی نامه از دانشگاه و کارت دانشجویی در روز همایش الزامی است.

 قابل توجه کلیه دانشجویان و شرکت کنندگان در بیست و یکمین همایش ملی سالیانه بتن و زلزله:
همایش ملی سالیانه بتن و زلزله و آیین نامه مسابقات دانشجویی مرکز تحقیقات بتن (متب) طبق مصوبه وزارت علوم، تحقیقات و فناوری متعلق و خاص این مرکز بوده و استفاده از آنها خارج از مسابقات فوق پیگرد قانونی خواهد داشت.