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All Journal Jurnal Rekayasa Jurnal Rekayasa Sipil dan Desain Teras Jurnal Journal of Engineering and Scientific Research (JESR)
Vera Agustriana Noorhidana
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Other

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Perilaku Balok Beton Bertulang Dengan Variasi Tinggi Lubang (Web Opening) Akibat Beban Lentur Noorhidana, Vera Agustriana
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 16, No 2 (2012): Edisi Agustus 2012
Publisher : UNIVERSITAS LAMPUNG

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Abstract

The purpose of this study is to analyze the effect of the height of web openings on behaviour ofreinforced concrete beams. The dimensions of web openings are 180mm in length with variationsof height (40mm, 90mm, and 135mm), which is is located on the middle of beam’s span. Thespecimens were four reinforced concrete beams (150mmx270mmx3000mm), namely BP (a beamwithout web openings, BL1 ( a beam with web openings having heights of 40mm), BL2 ( a beamwith web openings having heights of 90mm), and BL3 ( a beam with web openings having heightsof 135mm). There were strengthening bars around the openings to avoid the happening of firstcracks around the openings. Compressive strength of concrete was 20 MPa. The testing of beamsused third-point-loading method which had 2700mm clear span. The results were, the maximumloads of BP, BL1, BL2, and BL3 were 3717kg, 3581kg, dan 3649kg respectively. The curve ofload-deflection and moment-curvature of each beam were sharper from BP, BL1, BL2, and BL3respectively. The conclusion is, the higher of openings will result the higher of maximum loads ofbeams, which is caused by the position of strengthening bars closer to flexural bars resulting thehigher of nominal moments.
Mechanical properties improvement of Self Compacting Concrete (SCC) using polypropylene fiber Vera Agustriana Noorhidana Noorhidana; Laksmi Irianti Irianti; Tas'an Junaedi Junaedi
Journal of Engineering and Scientific Research Vol. 3 No. 1 (2021)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (730.316 KB) | DOI: 10.23960/jesr.v3i1.80

Abstract

SCC (self-compacting concrete) is a type of concrete that can compact itself without the help of external compaction. Thus, it can fill all parts of the formwork that are narrow and have tight reinforcement. A problem that often arises in the use of SCC is the segregation of concrete mixture, which reduces the strength of the concrete. This paper presents the effect of polypropylene fiber on the fresh concrete workability, compressive strength, splitting-tensile strength, and flexural-tensile strength of SCC concrete. The variations of the polypropylene fiber added to the SCC mixture are 0%, 0.05%, 0.067%, 0.1%, and 0.15% of the concrete’s volume, with a water-cement ratio of 0.5 and 0.38 and dense-graded and gap-graded coarse aggregate. Each concrete variation is made into cubes (150x150x150 mm3) for the compressive strength test, cylinders (dia.150mm; height 300mm) for splitting-tensile test, and prisms (100x100x400 mm3) for the flexural-tensile test. The experiments were carried out with concretes with the age of 28 days. The result showed that, polypropylene fiber could reduce the segregation in the SCC concrete mixture. The optimal polypropylene fiber percentage is 0.05%, which could improve the compressive strength by 12.2%, the splitting strength by 17.7%, and flexural strength by 322.3% compared to SCC concrete without polypropylene fiber.
PENGARUH PELUBANGAN PADA BADAN BALOK BETON BERTULANG TERHADAP KAPASITAS BEBAN LENTUR Vera Agustriana Noorhidana; Eddy Purwanto
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 15, No 2 (2011): Edisi Agustus Tahun 2011
Publisher : UNIVERSITAS LAMPUNG

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Abstract

The purpose of this study is to analyze the behaviour of reinforced concrete beam with web opening. The variable of research is the location of web opening on a beam. There were no strengthening around the opening to represent situation of making an opening on existing beam. There were three reinforced concrete beams (150mmx270mmx3000mm) as spesimens, namely a beam without web opening (Code: BU), a beam with web opening which is located on the middle of span of beam (Code: BLLTP), and the other one is a beam with web opening which is located near the support (Code: BLGTP). Compressive strength of concrete was 20 MPa. The beamswere simply supported on 2700mm clear span, and subjected to at two points load were located 900mm from the support. The results were curve of load-deflection, curve of moment-curvature, and crack pattern. The maximum load of BU, BLLTP, and BLGTP were 3717kg, 3581kg, dan 3649kg respectively. The curve of load-deflection and moment-curvature showed that after first crack was happened, the curve of BLLTP and BLGTP were more ramps than curve of BU. The cracks were concentrated on around of openings start at lower load. The results showed that making the web opening without strengthening on existing beam has a little effect on the load capacity of beams (below 5%), but decrease the stiffness of beam significantly.
Pengaruh komposisi penambahan serat polypropylene terhadap kuat tekan dan kuat lentur self compacting mortar (SCM) Suma, Damas Novalda; Noorhidana, Vera Agustriana; sebayang, surya; Isneini, Mohd.
Jurnal Rekayasa Sipil dan Desain Vol 11, No 1 (2023): Edisi Maret 2023
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

AbstractSelf compacting mortar is a mortar which is able to flow under its own weight and completely fill the formwork without the need for external compaction, while maintaining its homogeneity. This study aims to determine the effect of variations in the addition of polypropylene fiber to the compressive strength and flexural strength of self compacting mortar (SCM), as well as to determine the optimum variation of the addition of polypropylene fiber in mixed mortar. In this study, the test specimens were made with a water-cement factor of 0.4 and the ratio between cement and fine aggregate was 1:2.5 and the addition of 2% superplasticizer by weight of cement and the addition of polypropylene fibers with variations of 0%, 0.04%, 0.06%, 0.08%, 0.1% of the volume of the mortar test object. Tests were carried out on specimens aged 28 days. The results showed that the compressive strength of SCM experienced an optimum increase in the addition of 0.04% polypropylene fiber which was 34.81 MPa with an increase percentage of 14.07% of mortar without fiber, while the flexural strength of SCM increased with increasing variations of polypropylene fiber until the increase The optimum variation occurred at 0.1% polypropylene fiber, namely 11.72 MPa with a percentage increase of 26.05% from mortar without fiber. Key words : polypropylene fiber, superplasticizer, compressive strength, flexural strength.
Analisis Variasi Layout Shearwall Dengan SNI 1726-2019 Terhadap Perilaku Bangunan Bertingkat (Studi Kasus: Gedung Pelayanan Publik Satu Atap Bandar Lampung) Setiawan, Andi; Isneini, Mohd.; Noorhidana, Vera Agustriana; Husni, Hasti Riakara
Jurnal Rekayasa Sipil dan Desain Vol 11, No 2 (2023): Edisi Juni 2023
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

Earthquake resistant buildings are not designed only by strengthening the resistance of the structure, but are also designed to reduce earthquake forces. One of the structural reinforcement elements that can reduce earthquake forces is shearwall. The variation of shearwall layout will have a different effect on the performance level of the structure. This study aims to determine the performance level of the structure with a variety of shearwall layouts in a building structure model using the pushover analysis method. Determining the level of structural performance using pushover analysis is carried out using the help of structural analysis programs based on SNI 1726-2019, SNI 1727-2020, SNI 2847-2019 and ATC-40. From the research results it was found that the structural performance level according to ATC-40 (1996), for model 1 and model 6 were included in the damage control category, while for model 2, model 3, model 4 and model 5 were included in the immediate occupancy category. Placement of shearwall which has the optimum value according to ATC-40 for the X direction occurs in model 2 with the shearwall installed in an L shape which is placed near the center of mass of the building. Whereas in the Y direction it occurs in model 3 with the shearwall installed in an L shape which is placed away from the center of mass of the building. Key words : shearwall, model, structure performance level, pushover analysis.
Analisis Perbandingan Pengaruh Variasi Ukuran Panjang Pada Kawat Bendrat Terhadap Beton Konvensional Ristama, M Alvany Veschonanda; Isneini, Mohd; Noorhidana, Vera Agustriana; Widyawati, Ratna
Jurnal Rekayasa Sipil dan Desain Vol 11, No 3 (2023): Edisi September 2023
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

AbstrakBeton adalah material konstruksi yang terdiri dari campuran bahan-bahan seperti semen, air, dan agregat, yang digunakan dalam berbagai jenis infrastruktur. Beton memiliki nilai kuat tekan yang tinggi namun lemah terhadap gaya tarik. Penambahan kawat bendrat pada beton dilakukan untuk menaikkan nilai kuat tarik dan kuat lentur beton. Penelitian ini menggunakan volume fraksi 0%, 0,75% dan 1,5% dengan menggunakan variasi panjang tiap volume fraksi sebesar 30 mm, 50 mm, dan 70 mm dan bertujuan untuk menganalisis panjang kawat bendrat paling efektif sebagai bahan campuran beton. Pengujian dilakukan pada umur rencana 28 hari dan pengujian kuat tekan menggunakan sampel silinder dengan diameter 150 mm dan tinggi 300 mm sedangkan pengujian kuat tarik lentur menggunakan sampel balok dengan ukuran 100x100x400 mm. Pada kuat tekan penambahan serat kawat bendrat dinilai tidak efektif dan mengalami penurunan terkecil pada beton volume fraksi 0,75% panjang kawat bendrat 50 mm dengan penurunan sebesar 0,68%. Sedangkan pada kuat tarik lentur penambahan serat kawat bendrat dinilai efektif dan mengalami peningkatan terbesar sebesar 168,39% dari beton normal yaitu pada beton volume fraksi 1,5% dengan panjang kawat bendrat 50 mm.Kata kunci : beton, serat kawat bendrat, variasi panjang, kuat tekan, kuat tarik lentur.
Analisis Kombinasi Campuran Serat Baja dan Kawat Bendrat pada Beton Konvensional Rahmanisa, Laila Indah; Isneini, Mohd; Noorhidana, Vera Agustriana; Widyawati, Ratna
Jurnal Rekayasa Sipil dan Desain Vol 11, No 3 (2023): Edisi September 2023
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

AbstrakBeton konvensional adalah beton dengan bahan campuran yang terdiri dari semen, air, agregat kasar, dan agregat halus. Beton konvensional memiliki kelemahan, yaitu lemah terhadap tarik dan bersifat getas. Untuk mengatasi kuat tarik yang rendah, beton konvensional dapat dicampurkan dengan serat. Pada penelitian ini, dilakukan penambahan kombinasi campuran serat baja 3D Dramix dan serat kawat bendrat. Tujuan dari penelitian ini adalah mencari perbandingan campuran serat baja 3D Dramix dan kawat bendrat yang optimal, karena dengan mengetahui perbandingan campuran yang optimal maka dapat ditemukan formulasi terbaik dari kerja beton serta dapat menekan pengeluaran untuk kebutuhan material (low effort, high impact). Penelitian ini dilakukan dengan penambahan volume fraksi 0%, 1%, dan 1,5% dari volume adukan beton. Benda uji yang digunakan berupa silinder dengan ukuran diameter 150 mm dan tinggi 300 mm untuk kuat tekan, dan balok dengan ukuran (100 x 100 x 400) mm untuk kuat tarik lentur. Dari hasil penelitian telah didapat kesimpulan : (1) Dari campuran kombinasi 3D Dramix dan kawat bendrat didapat perbandingan yang memberikan hasil paling optimum untuk menaikkan nilai kuat tekan yaitu pada kadar variasi 3D Dramix 0,5% dan kawat bendrat 0,5% di volume fraksi 1%. (2) Dari campuran kombinasi 3D Dramix dan kawat bendrat didapat perbandingan yang memberikan hasil paling optimum untuk menaikkan nilai kuat tarik lentur yaitu pada kadar variasi 3D Dramix 0,5% dan kawat bendrat 1% di volume fraksi 1,5%.  Kata kunci : Serat baja 3D Dramix, kawat bendrat, kuat tekan, kuat tarik lentur.
Pengaruh Styrofoam sebagai Pengganti Sebagian Agregat Kasar terhadap Sifat Mekanik Self-compacting Concrete (SCC) Agustin, Cahyani Putri; Helmi, Masdar; Noorhidana, Vera Agustriana; Isneini, Mohd
Teras Jurnal : Jurnal Teknik Sipil Vol. 15 No. 2 (2025): Teras Jurnal (September)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v15i2.1284

Abstract

Abstrak   Styrofoam merupakan salah satu solusi untuk mengurangi beban mati pada struktur. Styrofoam dalam beton dapat berperan sebagai pengisi udara yang menciptakan void, sehingga styrofoam dapat menghasilkan beton yang lebih ringan. Penelitian ini dilakukan dengan mengganti sebagian agregat kasar dengan 10%, 20%, dan 30% butiran styrofoam pada SCC (Self-compacting Concrete). Hasil uji menunjukkan bahwa semakin tinggi kadar styrofoam, maka akan semakin rendah berat volume, kuat tekan, kuat tarik, kuat lentur, dan akan semakin tinggi daya serap air beton tersebut. Hasil optimum yang diperoleh berdasarkan pengujian kuat tekan, kuat tarik belah, dan kuat lentur ada pada beton dengan kadar styrofoam 10%, dengan hasil pengujian berturut-turut yaitu, 20,6227 MPa, 2,348 MPa, dan 4,3148 MPa, sedangkan untuk Penyerapan air tertinggi terjadi pada BS3 (styrofoam 30%), yang menghasilkan 12,4450% peningkatan daya serap.    Kata kunci: Styrofoam, berat volume, sifat mekanik, self compacting concrete (SCC)   Abstract   Styrofoam is one of the solutions to reduce dead loads on structures. Styrofoam in concrete can act as an air filler that creates voids, so styrofoam can produce lighter concrete. This research was carried out by replacing part of the coarse aggregate with 10%, 20%, and 30% styrofoam granules in SCC (Self-compacting Concrete). The test results show that the higher the styrofoam content, the lower the volume weight, compressive strength, tensile strength, bending strength, and the higher the water absorption of the concrete. The optimum results obtained based on the testing of compressive strength, tensile strength, and flexural strength were on concrete with a styrofoam content of 10%, with consecutive test results of 20.6227 MPa, 2.348 MPa, and 4.3148 MPa, while for the highest water absorption occurred in BS3 (30% styrofoam), which resulted in a 12.4450% increase in absorbency.    Kata kunci: Styrofoam, weight volume, mechanical properties, self-compacting concrete (SCC)
Co-Authors Agustin, Cahyani Putri Andi Setiawan Eddy Purwanto Hasti Riakara Husni Isneini, Mohd Laksmi Irianti Irianti Masdar Helmi Mohd. Isneini Rahmanisa, Laila Indah Ratna Widyawati Ristama, M Alvany Veschonanda Suma, Damas Novalda Surya Sebayang Tas'an Junaedi Junaedi