Vera Agustriana Noorhidana
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Evaluasi Kinerja Struktur Gedung Bertingkat dengan Metode Analisis Time History (Studi Kasus: Apartemen Kingland Avenue Serpong) Mayka Purnama Putra; Mohd. Isneini; Vera Agustriana Noorhidana
Jurnal Rekayasa Sipil dan Desain Vol 9, No 1 (2021): Edisi Maret 2021
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The high level of seismic activities in Indonesia causes the planning of building structures to be taken into account against the acceleration of the earthquake on the ground. Earthquake acceleration on the ground is an earthquake parameter that has a direct impact on the structure. Time history dynamic analysis can represent the dynamic properties of earthquake acceleration and structural response. So that this analysis method can provide a more complete description and information on structural responses. Earthquake recording data uses actual 3 earthquake accelerograms which are scaled with the planned earthquake response spectrum. From the results of this study, it is found that according to ATC-40 the building structure is included in the damage control category. Meanwhile, according to SNI 1726 (2019), the Chi-Chi and El Centro earthquakes met the requirements for deviation bricks between permit floors, but in the Kobe earthquake, the building structure did not meet the deviation requirements between permit floors on the 3rd floor.
Pengaruh Variasi Serat Polypropylene dan Faktor Air Semen Pada Uji Kuat Tekan, Kuat Tarik Belah dan Kuat Lentur Self Compacting Concrete (SCC) Melinda Gusti; Vera Agustriana Noorhidana; Laksmi Irianti
Jurnal Rekayasa Sipil dan Desain Vol 9, No 1 (2021): Edisi Maret 2021
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Self compacting concrete (SCC) adalahinovasi beton konvensional dalam menyesuaikan kebutuhan proses konsruksidengan tulangan rapat yang tidak memerlukan pemadatan. Pada penelitian ini sampel dibuat dalam 2 FAS yaitu 0,38 dan 0,5 dengan diberi penambahan serat polypropylene dengan volume fraksi sebesar 0%; 0,05%; 0,10% dan 0,15%. Penambahan ini dilakukan untuk mengetahui pengaruh serat polypropylene pada pada fas 0,38 dan 0,5 terhadap kuat tekan, kuat tarik belah dan kuat lentur. Sampel dalam penelitian ini adalah kubus (15 x 15 x 15 cm) untuk pengujian kuat tekan, silinder (diameter 15 cm dan tinggu 30 cm) untuk pengujian kuat tarik belah, dan balok (10 x 10 x 40 cm) untuk pengujian kuat lentur beton. Kemudian ketiganya diuji pada umur 28 hari.Pada FAS 0,38 dengan penambahan polypropylene sebesar 0,05% terjadi peningkatan nilai kuat tekan beton dari 43,90 MPa menjadi 45,38 MPa, nilai kuat tarik belah dari 2,67 MPa menjadi 4,04 MPa, dan nilai kuat lentur beton dari 2,25 MPa menjadi 6,62 MPa dari beton tanpa serat. Pada FAS 0,5 dengan penambahan polypropylene sebesar 0,05% terjadi peningkatan nilai kuat tekan beton dari 28,38 MPa menjadi 31,83 MPa, nilai kuat tarik belah dari 2,66 MPa menjadi 2,75 MPa, dan nilai kuat lentur beton dari 1,61 MPa menjadi 5,69 MPa dari beton tanpa serat.
Kinerja Kuat Geser Interface Beton Lama (Substrate) Dan Beton Baru (Overlay) Dengan Variasi Sudut Kemiringan Dan Volume Fraksi Serat Baja Imam Hussein; Vera Agustriana Noorhidana; Mohd. Isneini
Jurnal Rekayasa Sipil dan Desain Vol 8, No 3 (2020): Edisi September 2020
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Dalam suatu pekerjaan struktur seringkali dijumpai pekerjaan perbaikan atau perkuatan struktur beton. Permasalahan yang sering muncul pada pekerjaan perbaikan atau perkuatan struktur terletak pada lekatan antara beton lama dan baru, dimana pertemuan (interface) merupakan bagian terlemah dari struktur. Penelitian ini bertujuan untuk mengetahui kinerja kuat geser lekatan interface antara beton lama (substrate) dengan beton baru (overlay) dengan variasi sudut kemiringan dan volume fraksi serat baja pada beton baru. Metode yang digunakan adalah metode Slant Shear Test, dengan menggunakan benda uji berbentuk prisma dengan dimensi 150 x 150 x 300 mm. Terdapat 2 variasi yang digunakan yaitu, (1) variasi sudut kemiringan 30°,45°, dan 70°dan (2) variasi campuran serat baja pada lapis overlay sebesar 0%, 0,5%, 1% dan 1,5%. Pada setiap variasi dibuat benda uji kuat tekan (kubus 150 x 150 x 150) dan kuat tarik lentur (balok 100 x 100 x 400). Dari hasil penelitian dapat disimpulkan bahwa 1) Kemiringan interface antara beton lama dan beton baru terhadap arah beban tekan mempengaruhi kuat geser lekatan antara beton lama dan beton baru, 2) Penambahan serat baja dalam beton overlay dapat meningkatkan kuat lekatan antara beton lama-baru dan kuat tarik lentur beton.  Kata kunci : kuat geser, interface, substrate, overlay, kuat tarik lentur.
Kuat Lekat Beton dengan Variasi Umur Beton, Kekasaran Permukaan, Kelembapan dan Mutu Beton Vania Meutia Andhini; Vera Agustriana Noorhidana; Fikri Alami
Jurnal Rekayasa Sipil dan Desain Vol 8, No 4 (2020): Edisi Desember 2020
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AbstractStructure strengthening by adding fresh concrete mix to he existing concrete has a weakness in the bonding between the concrete joint. Research on the concrete-to-concrete bond strength has been carried out with various treatments. This study aims to determine the factors that influence bond strength between old concrete (substrate) and new concrete (overlay). The factors include are the substrate's ages, substrate surface's roughness, water content of the substrate and the compressive strength of the added concrete.The test method used in this study is slant shear test to quantify the bond strength. 150 × 150 × 300 mm2 prism with the interface line angle at 30°to the vertical was used as the specimen. The specimen cast in 2 phases, first substrate casting and second overlay casting. The overlay cast at different age of substrate depends on the variation needed. The treatments given are: 1) difference of overlay compressive strength which use 15 MPa, 25 MPa and 45 MPa concrete compressive strength; 2) difference of substrate’s ages at 7 days, 28 days and 42 days; 3) difference of substrate surface’s roughness with 3 sub-variations smooth, medium and coarse; 4) difference of water content of substrate specimen with dry, SSD and wet sub-variations.Keyword : concrete-to-concrete bond strength, slant shear test, interface roughness, substrate's ages.
Analisis Pengaruh Penggunaan Serat Polypropylene Terhadap Self Compacting Concrete (SCC) dengan Bahan Dasar Agregat Kasar Gradasi Senjang (Gap-Grading) Adipati Syahidullah Ulini'am; Vera Agustriana Noorhidana; Laksmi Irianti; Mohd Isneini
Jurnal Rekayasa Sipil dan Desain Vol 9, No 2 (2021): Edisi Juni 2021
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In general, Self Compacting Concrete (SCC) uses coarse aggreggate with dense graded for mix composition. However, in certain places, sometimes the sources of aggreggate are limited and there’s no stone crusher with possibly use coarse aggreggate with gap graded. H. This research was conducted for investigate the effect of polypropylene fiber additions to SCC with gap graded on workability, compressive strength, splitting tensile strength, and bending strength. Test result for Slump-Flow and T50 for both of gradation with Vf 0%, 0,05%, and 0,1% quilify that Slump-Flow are about 50-65 cm and T50 are 3-15 second. Test result for compressive strength of SCC with gap graded, the optimum Vf is 0,05% with 7,02% increase in strength compared to dense graded with 0% Vf. Test result for split tensile strength of SCC with gap graded, the optimum Vf is 0,05% with 45,53% increase in strength compared to dense graded with 0% Vf. Test result for bending strength of SCC with gap graded, the optimum Vf is 0,05% with 347,28% increase in strength compared to dense graded with 0% Vf.
Pemanfaatan Limbah Plastik Bekas Gelas Kemasan Untuk Meningkatkan Kekuatan Campuran Beton Sebagai Bahan Rigid Pavement Evanthe Calosa; Sasana Putra; Vera Agustriana Noorhidana; Muhammad Karami
Jurnal Rekayasa Sipil dan Desain Vol 10, No 2 (2022): Edisi Juni 2022
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Concrete is the main material of rigid pavement that can withstand compressive strength and weak to tensile strength. Flexural tensile strength on rigid pavement itself is a benchmark in concrete pavement. To increase the value of the flexural tensile strength can be done by adding fiber to the concrete mixture. The purpose of this study was to determine the effect of the addition of plastic waste from plastic packaging made of polypropylene on the compressive strength and flexural tensile strength of concrete.In this study, the addition of used plastic waste pieces from packaged glass used fractional volumes of 0%, 0.1%, 0.3%, 0.5%, and 0.7% of the volume of concrete mixture. The samples for this study were a cylinder with a diameter of 15 cm and a height of 30 cm for the compressive strength test and a beam measuring 15 x 15 x 60 cm for the flexural tensile strength test. The test was carried out after the concrete had been 28 days old. The result of this research is the compressive strength decreased along with the amount escalation of the fiber to the concrete mixture. The flexural tensile strength maximum occur of the addition of plastic fibers at 2% volume fraction increased by 23,75% compared to flexural tensile strength of normal concrete. As a result of adding plastic fibers to the concrete mixture, it also decreased the workability of the concrete mixture
Pengaruh Serat Baja Terhadap Kuat Tarik Lentur Balok Beton yang Disambung Tri Ratna Utami; Vera Agustriana Noorhidana; Surya Sebayang; Masdar Helmi
Jurnal Rekayasa Sipil dan Desain Vol 10, No 2 (2022): Edisi Juni 2022
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The casting of concrete at different times often occurs, this is due to insufficient casting time, expansion or connection of structural components, strengthening of structures with additional dimensions, and so on. Thus there will be the addition of a new layer of concrete (overlay). This study is to determine the flexural tensile strength of concrete beams for joining old concrete and new concrete with the addition of steel fiber volume fractions of 0%, 1%, 1.5%, and 2% in the substrate layers overlay and also the compressive strength of the concrete in each layer. The samples in this study were beams (15 x 15 x 60 cm) with a thickness of 7.5 cm for substrate and overlay for flexural tensile strength testing and cylinders (15 cm in diameter and 30 cm in height) for compressive strength testing. From the results of the study, it was found that the flexural tensile strength of the beam with the addition of steel fibers in the substrate layer was higher than the addition of steel fibers in the overlay layer. The addition of steel fibers in the substrate and overlay layers makes the beam more ductile. The maximum flexural tensile strength of the beam with the addition of steel fibers in the substrate layer occurs at  volume fraction 1.5%, has an increase of 114.03% from the joint beam without steel fibers while the addition of steel fibers in the overlay layer occurs at volume fraction 2%, has an increase of 8.66% of the joint beams without steel fibers.
Analisis Perbandingan Pengaruh Campuran Kawat Bendrat dan Serat Baja pada Self Compacting Concrete (SCC) Sylvia Dewi Anggraeni; Vera Agustriana Noorhidana; Laksmi Irianti; Mohd. Isneini
Jurnal Rekayasa Sipil dan Desain Vol 10, No 2 (2022): Edisi Juni 2022
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Self compacting concrete (SCC) is a concrete innovation that is carried out to overcome problems during casting that does not require manual compaction even in hard-to-reach places such as tight reinforcement. In this study, 3D Dramix steel fibers and bendrat wire were used as a mixture in SCC with volume fractions of 0%, 0.5%, 1%, 1.5%. The addition of this fiber aims to determine the effect of the two fibers on SCC on compressive strength, split tensile strength and flexural tensile strength. The sample in this study was a cylinder with a diameter of 150 mm and a height of 300 mm for testing the compressive strength and split tensile strength while the flexural tensile strength used a beam sample with a size of 100x100x400 mm. All samples of these specimens were tested when the concrete was 28 days old. The increase in the value of compressive strength, split tensile strength and flexural strength at the addition of 1.5% steel fiber were 26.39%, 64.71% and 111.88% respectively for concrete with 0% fiber. While the increase in compressive strength, split tensile strength and flexural strength with the addition of 1.5% bendrat wire was 20.31%, 60.74% and 76.18% for concrete with 0% fiber, respectively.
Pengaruh Penggunaan Fly Ash Sebgai Bahan Pengganti Sejumlah Semen dan Bahan Tambahan Terhadap Kuat Tekan pada Self Compacting Concrete (SCC) Corry Jayaputri Sahast; Vera Agustriana Noorhidana; Laksmi Irianti; Surya Sebayang
Jurnal Rekayasa Sipil dan Desain Vol 10, No 2 (2022): Edisi Juni 2022
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Self Compacting Concrete (SCC) is an innovation of concrete which has an ability to flow on its own to fill the empty voids between reinforcement and formwork without support of compaction equipment to obtain its optimum compaction. In this research, concrete cylinder with dimension of 15 cm for diameter and 30 cm for height were used as a specimen and mixed with fly ash type C as cement partial substitute material and additional substance by variation of 0%, 3%, 6%, 9%, and 12% with water cement ratio of 0.41. Slump flow test was perform to identify concrete flowability and workability followed by concrete compression test to identify compressive strength which was conducted at the age of 35 days and 56 days. Due to the fact that percentage variation of fly ash increment, the value of slump flow test was experiencing degradation whereas the compressive strength was increased. Nonetheless, the optimum fly ash application appeared when fly ash was applied as a cement partial substitute at variation of 3%, which provide concrete compressive strength in the amount of 35.98 MPa (35 days) and 33.68 MPa (56 days), and the value of concrete density were 2313.21 kg/m3 and 2279.66 kg/m3 , where the standard of slump flow test and T50 values had accomplished.
Studi Eksperimental Pengaruh Variasi Ukuran Recycled Coarse Aggregate (RCA) Terhadap Kuat Tekan dan Kuat Tarik Belah Beton Mutu Normal. Nur Mila Putri; Laksmi Irianti; Surya Sebayang; Vera Agustriana Noorhidana
Jurnal Rekayasa Sipil dan Desain Vol 10, No 2 (2022): Edisi Juni 2022
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AbstractScattered concrete waste can cause adverse effects for the surrounding environment. It  must be recycled to reduce the waste, one of which is as a substitute for coarse aggregates of broken stones. To find out the feasibility of RCA concrete must be done material testing as well as testing of compressive strength and tensile strength using a cylinder test object measuring 15 x 30 cm. In this study, the materials used were RCA with a maximum aggregate size of 1 cm, 2 cm, and 4 cm which were randomly taken around the Materials and Construction Laboratory. So it is expected that unused concrete can be reused to reduce existing concrete waste. The results of 28-day split compressive strength for aggregate size of 1 cm on 28,99 MPa, 2 cm on 28,52 MPa, and 4 cm on 26,29 MPa. 28-day RCA size of 1 cm on 28,21 MPa, 2 cm on 27,72 MPa, and 4 cm on 25,09 MPa. The results of 28-day split tesnsile strength for 1 cm on 3,18 MPa, 2 cm on 2,81 MPa, and 4 cm on 2,58 MPa. 28-day RCA for aggregate size of 1 cm on 2,99 MPa, 2 cm on 2,48 MPa, and 4 cm on 2,31 Mpa. From these results, it is also known that the decrease in concrete testing results using RCA against splits is 2,69–4,56% for compressive strength and 5,97–10,47% for tesnsile strength.Keyword: RCA, size, compressive strength, splitting tesnsile test. AbstrakLimbah beton yang berserakan dapat menyebabkan dampak buruk bagi lingkungan sekitar. Untuk mengurangi limbah tersebut harus dilakukan daur ulang, salah satunya yaitu sebagai pengganti agregat kasar pada beton. Untuk mengetahui kelayakan RCA tersebut harus dilakukan pengujian material serta pengujian kuat tekan dan kuat tarik belah pada beton dengan menggunakan benda uji silinder berukuran 15 x 30 cm. Pada penelitian ini, material yang digunakan yaitu RCA dengan ukuran maksimum agregat 1 cm, 2 cm, dan 4 cm yang diambil secara acak di sekitar Laboratorium Bahan dan Konstruksi. Diharapkan beton yang sudah tidak terpakai dapat digunakan kembali agar mengurangi limbah beton yang ada.Hasil pengujian kuat tekan beton 28 hari yang menggunakan split ukuran 1 cm sebesar 28,99 MPa, 2 cm sebesar 28,52 MPa, dan 4 cm sebesar 26,29 MPa. Pada beton RCA umur 28 hari untukukuran 1 cm sebesar 28,21 MPa, 2 cm sebesar 27,72 MPa, dan 4 cm sebesar 25,09 MPa. Hasil pengujian kuat tarik belah 28 hari pada beton yang menggunakan split ukuran 1 cm sebesar 3,18 MPa, 2 cm sebesar 2,81 MPa, dan 4 cm sebesar 2,58 MPa. Pada beton RCA umur 28 hari ukuran 1 cm sebesar 2,99 MPa, 2 cm sebesar 2,48 MPa, dan 4 cm sebesar 2,31 MPa. Dari hasil tersebut juga diketahui penurunan hasil pengujian beton RCA terhadap beton split yaitu sebesar 2,69 – 4,56% untuk kuat tekan dan 5,97 – 10,47% untuk kuat tarik belah. Kata kunci: RCA, ukuran, kuat tekan, kuat tarik belah.