Sudarmawan, I Kadek Bayu and Dr. Eng. Lilya Susanti, ST., MT. and Dr. Eng. Eva Arifi, ST., MT. (2022) Pengaruh Penambahan Sengkang Luar terhadap Pola Retak dan Kuat Geser Balok Beton Bertulang. Sarjana thesis, Universitas Brawijaya.
Abstract
Dalam perhitungan teori sengkang yang tercetak di dalam benda uji, yang menggunakan semen slag dan fly ash sebagai seconday cement material, dinilai kurang kuat dalam menahan gaya geser yang dialami oleh balok. Oleh karena itu ditambahkan sengkang luar dengan tujuan memperkuat kuat geser balok beton bertulang. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan sengkang luar terhadap pola retak dan kuat geser balok. Pada penelitian ini benda uji dengan dimensi 15x15x100 cm yang menggunakan komposisi semen slag 0%, 10%, 40%, dan 70% serta dengan mutu K-350 dan K-275 ditambahkan sengkang luar sebanyak tiga dan empat buah. satu benda uji dibiarkan tanpa penambahan sengkang luar sebagai kontrol. Sehingga terdapat 24 benda uji. Pengujian dilakukan dengan memberi dua titik beban di tengah bentang dengan jarak simetris. Pembebanan balok dilakukan dengan interval 500 kg hingga beban tidak dapat dinaikkan lagi. Data yang diperoleh dari pengujian lentur untuk dianalisis berupa beban dan pola retak. Hasil penelitian yang didapatkan adalah penambahan sengkang luar mempunyai pengaruh yang bervariasi ketika ditambahkan, untuk penambahan tiga buah sengkang luar dengan mutu beton K-350 besar peningkatannya secara berturut (-28%), (-6,89%), (61,53%), dan (-57,69%). Untuk mutu beton K-275 besar peningkatannya secara berturut (0%), (21,05%), (4,76%), dan (4,76%). Untuk penambahan empat buah sengkang luar dengan mutu beton K-350 besar [eningkatannya secara berturut (32%), (-3,44%), (76,92%), dan (- 34,61%). Untuk mutu beton K-275 besar peningkatannya secara berturut (20,83%), (31,57%), (0%), dan (4,76%). Berdasarkan hasil analisis pola retak didapatkan bahwa penambahan sengkang luar dapat mengubah pola retak geser yang dialami oleh balok menjadi lebih ke tengah bentang.
English Abstract
Based on the theoretical calculations of the stirrups inside sample beams, which use slag cement and fly ash as secondary cement material, it is discovered that such compositions tend to be not as strong in bearing the shearing force as in bearing the flexural strength of the sample beams. Therefore, adding some external stirrups are required in order to improve the strength of the reinforced concrete beams. The purpose of this study is to know the effect of adding external stirrups to crack pattern and shear strength of the beams. Moreover, the dimensions of the sample beams used in this study is 15x15x100 cm with slag cement composition of 0%, 10%, 40%, and 70% as well as the concrete quality K- 350 and K-275 of which from three sample we built, two of them are added with three and four numbers of external stirrups each. One beam is set as a control so that it is left deliberately without any additional external stirrups which make the beam in total of 24 samples. The test is conducted by giving two load points in the middle of the beam span with symmetrical distance. Beam loading is executed at 500 kg intervals up to the maximum carrying capacity of the beam itself. There are two primary data obtained from this flexural strength test to be analyzed further, namely in the form of loads and crack patterns. The results of this study shows that the external stirrup has relatively various effects as it is added to the reinforced concrete beam. First of all, by adding three external stirrups in beam with concrete quality K-350 add shear strength, in succession of slag cement composition, (-28%), (-6.9%), (61.53%), and (-57.69%) from the control beam. For beams with concrete quality K-275 add shear strength, in succession, (0%), (21.05%), (4.76%), and (4.76%) from the control beam. Adding four external stirrups in beam with concrete quality K-350 add shear strength, in succession, (32%), (-3.45%), (76.92%), and (-34.62%) from the control beam. For beams with concrete quality K-275 add shear strength, in succession, (20.83%), (31.56%), (0%), and (4.76%) from the control beam. Further, according to the crack pattern analysis it can be concluded that by adding external stirrups to the beam can significantly change the pattern of its flexural crack in which it is indicated to mostly move towards the middle of the beam.
Other obstract
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| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | 0522070159 |
| Uncontrolled Keywords: | Kata kunci: Sengkang luar, Kuat Geser, Pola Retak. |
| Subjects: | 600 Technology (Applied sciences) > 624 Civil engineering |
| Divisions: | Fakultas Teknik > Teknik Sipil |
| Depositing User: | yulia Chasanah |
| Date Deposited: | 09 Aug 2022 07:32 |
| Last Modified: | 09 Aug 2022 07:32 |
| URI: | http://repository.ub.ac.id/id/eprint/193072 |
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