Dibiantara, Dimas P (2015) Simulasi keruntuhan pelat beton bertulang dengan dan tanpa takikan. Masters thesis, Institut Teknologi Sepuluh Nopember.
Preview |
Text
3112202009-Dissertation.pdf Download (4MB) | Preview |
Abstract
Pola keruntuhan elemen beton bertulang tentunya tak dapat dipisahkan
dari karakteristik material pembentuknya. Secara umum, pola keruntuhannya
diawali dengan perkembangan dan perambatan retak rambut yang memang
sudah ada saat proses pencetakan elemen ini. Beberapa hal yang mengawali
terjadinya retak sebelum pembebanan seperti proses hidrasi yang menimbulkan
panas, proses curing yang kurang tepat, penyusutan akibat hilangnya air.
Sedangkan pada saat pembebanan, perkembangan dan perambatan retak inisial
ini disebabkan oleh terjadinya deformasi pada elemen penahan gaya tarik
elemen tersebut, sehingga mempengaruhi deformasi elemen penahan gaya
tekannya.
Makalah ini membahas dan membandingkan keruntuhan yang terjadi
pada pelat beton bertulang secara eksperimental dan numerik (250x100x1000),
dengan dan tanpa takikan. Pemodelan pelat dilakukan dengan program bantu
CAST3M 13 secara 2D, elemen beton dimodelkan sebagai elemen QUA4 dan
elemen baja tulangan sebagai BARR (Beton CEA). Perbandingan secara
eksperimental menunjukkan pelat tak bertakik memiliki nilai modulus Young
24 Gpa dengan angka kekakuan 14285 N/mm dan lendutan maksimum 0.7mm,
sedangkan pelat bertakik 19 Gpa dengan 13749 N/mm dan 0.8mm.
Perbandingan secara numerik menunjukkan nilai lendutan batas elastis pelat
tak bertakik sebesar 0.3mm dan batas plastis 4.3mm, sedangkan pelat bertakik
sebesar 0.56mm dan 4.4mm. Hal ini mengindikasikan bahwa dampak
keberadaan takikan berfungsi untuk meningkatkan nilai lendutan di awal
pembebanan, yang berarti kekakuan benda uji menurun secara signifikan pada
awal pembebanan.
=====================================================================================================================
Collapse scheme of reinforced concrete element certainly can not be
separated from the characteristics of the constituent material. In general, the
pattern collapse started with the development and propagation of cracks that
was already there when the casting process of these elements was finished.
Some of the things that led to a crack before loading as hydration process that
generate heat, lack of proper curing, shrinkage due to water loss. While at the
time of loading, the development and initial crack propagation is caused by the
deformation of the retaining elements gravity of these elements, thus affecting
the compressive force resisting deformation element.
This paper discusses and compares the collapse that occurred in
reinforced concrete slab experimentally and numerically (250x100x1000), with
and without the notch. Modeling plate carried by program CAST3M 13 in 2D,
concrete elements are modeled as QUA4 elements and reinforcing steel
elements as BARR (Concrete CEA). Comparison of experimentally showed
un-notched plate has a Young's modulus value of 24 GPa with stiffness
numbers 14 285 N / mm and a maximum deflection of 0.7mm, while the
notched plate 19 GPa to 13 749 N / mm and 0.8mm. Comparison of
numerically demonstrate the value of the elastic limit deflection plate was
notched by 0.3mm and 4.3mm plastic limit, while the notched plate of 0.56mm
and 4.4mm. This indicates that the impact of the presence of the notch serves to
increase the deflection value at the beginning of loading, which means the
specimen stiffness decreased significantly at the start of loading.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTS 624.177 65 Dib s |
| Uncontrolled Keywords: | Pelat beton bertulang, pemodelan numerik, takikan, runtuh, retak |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Faculty of Civil Engineering and Planning > Civil Engineering > 22101-(S2) Master Thesis |
| Depositing User: | - Taufiq Rahmanu |
| Date Deposited: | 21 Nov 2019 04:40 |
| Last Modified: | 21 Nov 2019 04:40 |
| URI: | http://repository.its.ac.id/id/eprint/71938 |
Actions (login required)
 |
View Item |