Analisis Variasi Dimensi dan Penulangan Kolom terhadap Pembebanan Struktur Beton Bertulang

Abstract

In the modern era, concrete is a very important and widely used building material for construction. almost all civil engineering works and infrastructure development in Indonesia utilize concrete as the main material. This includes residential buildings, roads, bridges and other industries. Concrete is a mixture of sand, gravel, crushed stone or other aggregates mixed together with a paste made of cement and water to form a rock-like mass. The results of testing the compressive strength of Fc 35 and K350 quality concrete in the laboratory of Pt. Jaya Karya Konstruksi with cylindrical test objects measuring 15cm x 30cm at the age of 28 days obtained the maximum compressive strength of 679 KN (39.19 Mpa) and 510 KN (29.44 Mpa). Concrete Quality Fc 40 and K 400 in the form of a cylinder measuring 15cm x 30cm obtained the maximum compressive strength of 772 KN (44.55 Mpa) and 584 KN (33.59 Mpa). From the data obtained, the Fc 35 quality has a greater compressive strength than the K 350 quality with a difference of 9.75 Mpa at the age of 28 days. Quality Fc 40 has a greater compressive strength than quality K 400 with a difference of 10.96 Mpa at the age of 28 days. It's just that K2 on the 1st floor has an ultimate load that almost touches the nominal column compressive strength figure in the first modeling with a column compressive strength of 2586 KN and an ultimate load of 2303 KN. The results of the second modeling are that the dimensional variation of the column is more efficient because the use of smaller but strong structural columns is safer. Likewise when checking the cross-sectional ratio with the help of SAP2000 software. A score of 0.394 was obtained in K2 on the 1st floor, 0.346 in K2 on the 2nd floor, and 0.281 in K3 on the 3rd floor. A score of 0.285 was obtained on K1 on the 1st floor, 0.204 on K1 on the 2nd floor, and 0.231 on K2 on the 3rd floor. The value shows (<1), so the cross-sectional profile of the column used is still safe against load. In the second modeling experiment, a value of 0.383 was obtained in K2 on the 1st floor, 0.429 in K2 on the 2nd floor, and 0.353 in K3 on the 3rd floor. a score of 0.287 was obtained on the 1st floor of K1, 0.209 on the 2nd floor of the K1, and 0.248 on the 3rd floor of the K2. The value shows (<1), so the cross-sectional profile of the column used is still safe against load. In the second modeling experiment, a value of 0.383 was obtained in K2 on the 1st floor, 0.429 in K2 on the 2nd floor, and 0.353 in K3 on the 3rd floor. a score of 0.287 was obtained on the 1st floor of K1, 0.209 on the 2nd floor of the K1, and 0.248 on the 3rd floor of the K2. The value shows (<1), so the cross-sectional profile of the column used is still safe against load.