Experimental Study for Class B Lap Splice of 600 MPa (87 ksi) Reinforcing Bars

2014 ◽  
Vol 111 (1) ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 3482
Author(s):  
Seoungho Cho ◽  
Myungkwan Lim ◽  
Changhee Lee

High-strength reinforcing bars have high yield strengths. It is possible to reduce the number of reinforcing bars placed in a building. Accordingly, as the amount of reinforcement decreases, the spacing of reinforcing bars increases, workability improves, and the construction period shortens. To evaluate the structural performance of high-strength reinforcing bars and the joint performance of high-strength threaded reinforcing bars, flexural performance tests were performed in this study on 12 beam members with the compressive strength of concrete, the yield strength of the tensile reinforcing bars, and the tensile reinforcing bar ratio as variables. The yield strengths of the tensile reinforcement and joint methods were used as variables, and joint performance tests were performed for six beam members. Based on this study, the foundation for using high-strength reinforcing bars with a design standard yield strength equal to 600 MPa was established. Accordingly, mechanical joints of high-strength threaded reinforcing bars (600 and 670 MPa) can be used. All six specimens were destroyed under more than the expected nominal strength. Lap splice caused brittle fractures because it was not reinforced in stirrup. Increases of 21% to 47% in the loads of specimens using a coupler and a lock nut were observed. Shape yield represents destruction—a section must ensure sufficient ductility after yielding. Therefore, a coupler and lock nut are effective.


2006 ◽  
Vol 41 (10) ◽  
pp. 1394-1405 ◽  
Author(s):  
Camille A. Issa ◽  
Antoine Nasr

2021 ◽  
Vol 33 (4) ◽  
pp. 389-398
Author(s):  
Jin-Gyu Kim ◽  
Sung-Chul Chun ◽  
In-Ho Kim
Keyword(s):  

2017 ◽  
Vol 902 ◽  
pp. 33-40
Author(s):  
Cong Thuat Dang ◽  
Ngoc Hieu Dinh

Old reinforced concrete buildings constructed around 1980’s in many developing countries have been designed against mainly gravity load. Beam-column joints in these buildings contain slightly or no shear reinforcement inside the panel zones due to the construction convenience, and are vulnerable to shear failure in beam-column joints under the action of earthquake loads, especially for the exterior beam-column joints. This experimental study aimed to investigate the seismic performance of five half-scale exterior beam-column joints simulating the joints in existing reinforced-concrete buildings with non-shear hoop details. The test results showed that the structural performances of the beam-column joints under earthquake including failure mode, load-drift ratio relationship, shear strain of the joints and energy dissipation are strongly affected by the amount of longitudinal reinforcing bars of beams.


2018 ◽  
Vol 1 (1) ◽  
pp. 1-24
Author(s):  
ABDUL BASID

Abstrak Penelitian ini dilakukan untuk mengetahui strategi pengajaran kosakata dengan menggunakan (strategi bernyanyi). Rumusan masalah penelitian ini adalah (1) bagaimana proses strategi pengajaran kosakata bahasa Arab dengan menggunakan strategi bernyanyi, (2) bagaimana efektivitas penggunanan strategi pengajaran kosakata bahasa Arab dengan menggunakan strategi bernyanyi. Desain Penelitian yang digunakan adalah studi eksperimental.  Populasi dalam peneltian ini adalah seluruh mahasiswa progam Studi PBA di UIN Maulana Malik Ibrahim, adapun sampel yang diambil dari populasi tersebut adalah mahasiswa Program Studi PBA kelas B-4 UIN Maulana Malik Ibrahim Malang. Hasil dari penelitian ini menunjukkan bahwa (1) proses strategi pengajaran kosakata bahasa Arab dengan strategi bernyanyi yaitu aktivitas pra instruksional, petunjuk isi dan pembelajaran. Partisipasi peserta didik, penilaian, aktifitas timbal balik (2) efektifitas strategi pengajaran bahasa Arab dengan menggunakan strtegi bernyanyi menunjukkan nilai t-test lebih kecil daripadda t-tabel 0,243< 2, 0639, nilai t-test 0,243 itu berada diantara nilai interval konfidensi perbedaan, yaitu nilai tertinggi 1,901 dan nilai terendah 1,501 serta nilai signifikansi 0,810 yang mania lebih kecil dari t-table yaitu 2,0639     Abstract             This reserach elaborates on the teaching strategy of Arabic vocabulary by using the song. The research problems are: (1) what is the process of the teaching strategy of Arabic vocabulary by using the song; and (2) what is the effectiveness of the teaching strategy of Arabic vocabulary by using the song. The design of this study is experimental study. The population of this research is all students in PPBA UIN Maulana Malik Ibrahim Malang and the sample of this research is all students in class B-4 PPBA UIN Maulana Malik Ibrahim Malang. The result of this study is: (1) the process of the teaching strategy of Arabic vocabulary by using the song consist of several stages. They are pre instructional activities, content and learning guidance, learner participation, assessment, and follow-through activities; (2) the effectiveness of the teaching strategy of Arabic vocabulary by using the song is the value of t-test is smaller than t-table 0,243 < 2,0639, the value t-test 0,243 is between the value of confidence interval of the difference, upper 1,901 and lower -1,501, and signified value is 0,810 < t-table is 2,0639.     ملخص ويوضح هذا البحث التركيز في استراتيجية التدريس للمفردات العربية باستخدام الأغنية. وأما مشكلة البحث فهي: أولا، ما هي عملية إستراتيجية التدريس للمفردات العربية باستخدام الأغنية؛ وثانيا؛ ما هي فعالية استراتيجية التدريس للمفردات العربية باستخدام الأغنية. ويكون تصميم هذه الدراسة من نوع الدراسة التجريبية. أما مجتمع البحث لهذا البحث هو جميع الطلاب في قسم تعليم اللغة العربية بجامعة مولانا مالك إبراهيم الإسامية الحكمومية مالانج، والعينة من هذا البحث هو جميع الطلاب في الصف B-4 قسم تعليم اللغة العربية بجامعة مولانا مالك إبراهيم مالانج. والنتائج من هذه الدراسة هي: (1) عملية إستراتيجية التدريس للمفردات العربية باستخدام الأغنية تتكون من عدة مراحل. وهي أنشطة تعليمية سابقة، ومحتوى وإرشادات تعليمية، ومشاركة للمتعلم، وتقييم، وأنشطة متابعة. (2) أما فاعلية إستراتيجية التدريس للمفردات العربية باستخدام الأغنية هي قيمة اختبار t أصغر من t-تابل 0،243 <2،0639، قيمة t-تيست 0،243 بين قيمة فاصل الثقة في الفرق، العلوي 1،901 وأقل -1،501، وقيمة معترف بها هو 0،810 <t- الجدول هو 2،0639.  


2018 ◽  
Vol 172 ◽  
pp. 997-1010 ◽  
Author(s):  
Decroly Denouwe Djoubissie ◽  
Adamah Messan ◽  
Eric Fournely ◽  
Abdelhamid Bouchaïr

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