Garuda - Garba Rujukan Digital

BETON SELF COMPACTING CONCRETE DENGAN SERBUK KACA Roderick Afta; Istiqomah Istiqomah; Ben Novarro Batubara
Kokoh Vol 19, No 2 (2021): Juli 2021
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar

Self Compacting Concrete (SCC) is commonly referred to as flowing concrete because it has a high slump specification with a slump value of more than 19 cm (ASTM C 1017). Self-compacting concrete has been widely used in the construction world because it has several advantages, such as increasing workability. The high workability of SCC concrete is due to the use of superplasticizer added materials that are mixed into the concrete. With the addition of a superplasticizer, it can improve the workability of the concrete mix. So that SCC concrete has a low water-cement factor, SCC concrete is easier to work with when compared to normal concrete. In this study, the addition of the percentage of glass powder started from 0%, 2.5%, 5%, 7.5%, 10% and 12.5% with a 1.5% superplasticizer. Strength growth from each time difference of the concrete compressive test has increased the value of the compressive strength, the percentage increase in the average compressive strength test results. At the age of seven days the average compressive strength of concrete reaches 87.16%, while at 14 days the average compressive strength of concrete reaches 93.39%, and at 28 days the average compressive strength of concrete reaches 100%. The addition of glass powder to SCC concrete generally shows an increase in compressive strength. The highest average compressive strength was at 7.5% glass powder with 1.5% superplasticizer with a compressive strength of 7, 14, and 28 days, respectively, which was 48.80 MPa, 52.41 MPa, and 56.19 MPa. The level of addition of glass powder for SCC concrete based on the calculation of the maximum use of glass powder is 7.5% by weight of cement with a superplasticizer content of 1.5%Keywords: Concrete Mix, Flowing Concrete, Self Compacting Concrete, Strength, Superplasticizer

ANALISIS KINERJA STRUKTUR GEDUNG ASIMETRIS AKIBAT BEBAN GEMPA Fajar Abdilah; Istiqomah - Istiqomah; Ben Novarro Batubara
Kokoh Vol 20, No 1 (2022): Kokoh : Volume 20, Issue 1, Tahun 2022
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1027.182 KB)

The infrastucture of high-rise buildings must have an earthquake resistance. As a mitigation effort, a building must be symmetrical. When an earthquake occurs the response of the structure easily predictable. However, along with the development of architectural design, many buildings with irregular shapes (asymmetrical). So, it is necessary to analyze the behavior of structures in irregular buildings. The purpose of this study was to determined the maximum displacement value and a structural performance due to an earthquake loads based on ATC-40. The earthquake analysis used a Response Spectrum and Time History with the help of ETABS V17.0.1 software, case study located in Bekasi City Government Service Office (POLRES) building. The research used quantitative descriptive method. Based on the analysis, the maximum displacement value due to earthquake loads using the Response Spectrum analysis method for the X direction were 74,655 mm and 54,566 mm for the Y direction.

KARAKTERISTIK BETON GEOPOLIMER PADA AKTIVATOR NATRIUM HIDROKSIDA (NAOH) DAN NATRIUM SILIKAT (NA2SIO3) Ben Novarro Batubara; Istiqomah Istiqomah; Budi Kudwadi; Diza Alfan
Kokoh Vol 20, No 2 (2022): Juli 2022
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar

Geopolymer concrete is concrete composed of cystesis material of non-organic materials that go through a polymerization process so that it is environmentally friendly, so it can reduce the amount of carbon dioxide produced in Portland cement in the normal concrete manufacturing process which can cause a greenhouse effect. Geopolymer concrete requires a lot of silica and alumina. In geopolymer concrete, the most common alkaline activators used in geopolymer concrete are Sodium Hydroxide (NaOH) and Sodium Silicate (Na2SiO3). Fly Ash has a lot of silica and alumina and the role of alkali activator to dissolve the elements of silica and alumina. The method carried out is an experiment. This study used a ratio between fly ash and activator of 70%:30%, and used a ratio of activators between Na2SiO3 and NaOH of 5:2, 6:2, 7:2, 8:2, 9:2, with a cylinder test object of 20x10 cm with a test result of 42.71 MPa.Keywords: Activator, Compressive Strength, Geopolymer Concrete,

ANALISIS KINERJA STRUKTUR GEDUNG ASIMETRIS AKIBAT BEBAN GEMPA (Studi Kasus :Gedung Kantor Pelayanan Pemerintah (POLRES) Kota Bekasi) Fajar Abdilah; Istiqomah Istiqomah; Ben Novarro Batubara; Budi Kudwadi; Odih Supratman
Kokoh Vol 20, No 1 (2022): Januari 2022
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar

The infrastucture of high-rise buildings must have an earthquake resistance. As a mitigation effort, a building must be symmetrical. When an earthquake occurs the response of the structure easily predictable. However, along with the development of architectural design, many buildings with irregular shapes (asymmetrical). So, it is necessary to analyze the behavior of structures in irregular buildings. The purpose of this study was to determined the maximum displacement value and a structural performance due to an earthquake loads based on ATC-40. The earthquake analysis used a Response Spectrum and Time History with the help of ETABS V17.0.1 software, case study located in Bekasi City Government Service Office (POLRES) building. The research used quantitative descriptive method. Based on the analysis, the maximum displacement value due to earthquake loads using the Response Spectrum analysis method for the X direction were 74,655 mm and 54,566 mm for the Y direction.Keywords: Asymmetrical, Displacement structure, Earthquake loads, Earthquake Resistance, Structure performance,

EVALUASI KINERJA STRUKTUR BANGUNAN GEDUNG TAHAN GEMPA DENGAN METODE ANALISIS RESPONS SPEKTRUM DAN TIME HISTORY Muhammad Irsan Arrasyid; Istiqomah Istiqomah; Ben Novarro Batubara; Budi Kudwadi
Kokoh Vol 21, No 2 (2023): Juli 2023
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar

The city of Bandung is one of the cities that is prone to earthquakes because it is passed by the Lembang fault. Therefore, buildings in the city of Bandung should have implemented the concept of earthquake-resistant buildings in their construction. To avoid the occurrence of damage or collapse of the structure of the building against an earthquake, it is necessary to analyze the building against the earthquake. This study aims to determine how many deviations occur in the building due to the earthquake and the performance of the building structure. The method used is the response spectrum and time history analysis method and then evaluates the performance of the structure against earthquakes using the ATC-40 standard. The building that is the case study is the Directorate of Drugs and the Directorate of Intelligence and Security for the West Java Police, which consists of 5 floors. Structural modeling and analysis were performed using ETABS v20. Earthquake records used are Imperial Valley, Kobe and Trinidad earthquakes. Based on the results of the analysis of the maximum deviation with the response spectrum method 26.74 mm in the X direction and 26.46 mm in the Y direction. Meanwhile, for the time history analysis, it was obtained 33.05 mm in the X direction and 28.96 in the Y direction. The maximum value of the total deviation obtained 0.0016 m and the maximum value of inelastic deviation obtained 0.0014 m so that it shows the level of performance of this building structure based on ATC-40 is Immediate Occupancy (IO), which means the structure is in a safe condition.Keywords : ATC-40, earthquake resistant buildings, spectrum response, time history,

ANALISIS KINERJA STRUKTUR GEDUNG RUSUN ASN 3 AKIBAT BEBAN GEMPA Apriliani, Roski; Kudwadi, Budi; Batubara, Ben Novarro
Kokoh Vol 23, No 1 (2025): Januari 2025
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/k.v23i1.80076

Rusun ASN 3 Building is a multi-story residential building with height of 54.8 m located in East Kalimantan. For the comfort and safety of the building occupants, an analysis of the effects of earthquake loads is needed. This research analyzed using the response spectrum and time history methods. This research was conducted to determine the maximum drift value and level of structural performance based on ATC – 40. The results obtained were that the maximum drift value due to spectrum response earthquake was 41.6130 mm for X direction and 48.9380 mm for Y direction. The maximum drift value due to time history earthquake, for Chuetsu-oki earthquake it was 33.7160 mm in X direction and 55.3960 mm in Y direction; for Kushirooki earthquake it was 40.9760 mm in X direction and 39.9820 mm in Y direction; for Miyagi_Pre.Off earthquake, it was 53.5150 mm in X direction and 42.9820 mm in Y direction. The level of structural performance of the building due to earthquake loads, was at the Immediate Occupancy (IO) performance level, which means the building was still able to withstand the forces of the earthquake that occurred.Keywords : ATC-40, Spectrum Response, Time History, Dynamic Earthquake, Structural Performance

Evaluasi Kinerja Struktur Gedung Bertingkat Akibat Beban Gempa dengan Metode Pushover (Studi Kasus: Gedung Presisi 3 Mabes Polri) Pratiwi, Hilda Febriyani; Istiqomah, Istiqomah; Batubara, Ben Novarro
Portal: Jurnal Teknik Sipil Vol 17, No 2 (2025): October Edition
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/portal.v17i2.7741

Indonesia is located in the ring of fire and at the convergence of three tectonic plates, making it highly prone to earthquakes. This study aims to evaluate the seismic performance of the Presisi 3 Building at the Indonesian National Police Headquarters and determine its performance level based on displacement. The analysis was carried out using the response spectrum, equivalent static, and pushover methods with ETABS 18.1. The results indicate variations in maximum displacement and drift across the three methods. The pushover analysis produced a performance point with a base shear of 56,270.2575 kN and displacement of 461.685 mm in the x-direction, as well as a base shear of 49,926.4545 kN and displacement of 565.955 mm in the y-direction. According to ATC-40 and FEMA-440, the building’s performance level is categorized as Immediate Occupancy (IO), indicating that the structure remains safe and functional after an earthquake.Keywords: Displacement, Equivalent Static, Inter-story Drift, Pushover, Response Spectrum.

Title

Found 7 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 7 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 7 Documents
Search