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All Journal Jurnal Rekayasa Jurnal Rekayasa Sipil dan Desain Teras Jurnal Journal of Engineering and Scientific Research (JESR) Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung
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 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)
Pengaruh Penambahan Serat Baja Terhadap Kuat Lentur Balok Beton Bertulang pada Beton Mutu Normal Putra, Asyrofi Miranda; Noorhidana, Vera Agustriana; Isneini, Mohd
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 8 No. 2 (2020): Edisi Juni 2020
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v8i2.1366

Abstract

Penelitian pada skripsi ini merupakan studi eksperimental untuk menyelidiki pengaruh penambahan serat baja terhadap kuat lentur balok beton bertulang pada beton mutu normal. Penelitian ini juga membandingkan pola retak dan pola keruntuhan balok beton bertulang pada beton tanpa serat dan beton dengan campuran serat baja. Penelitian ini menggunakan sampel balok beton bertulang dengan ukuran 15 cm x 19 cm x 170 cm dengan 2 tulangan lentur D-10 mm (2D-10mm) dengan 1 buah sampel balok setiap volume fraction (Vf) 0%, 0,5%, 1% dan 1,5%. Sampel balok beton bertulang mempunyai bentang diantara dua tumpuan sederhana sepanjang 150 cm, dan diuji dengan dua beban titik secara bertahap dari nol sampai dengan runtuh. Pengujian tiap sampel dilakukan 28 hari setelah pengecoran. Dari hasil penelitian didapatkan: (1) Hasil uji kuat tekan tidak mengalami perbedaan yang signifikat dengan adanya penambahan serat baja., (2) Kuat tarik lentur balok beton tertinggi terdapat pada Vf 1,5% dan mengalami peningkatan sebesar 281,42% dari Vf 0%., dan (3) Kuat lentur balok beton bertulang dengan beban maksimum terdapat pada Vf 1,5% dan mengalami peningkatan sebesar 56,64% dari Vf 0%. Penambahan serat baja pada balok beton bertulang menyebabkan balok tersebut menjadi lebih kaku, penambahan serat juga dapat memperbaiki sifat getas pada beton.
Kinerja Kuat Geser Interface Beton Lama (Substrate) Dan Beton Baru (Overlay) Dengan Variasi Sudut Kemiringan Dan Volume Fraksi Serat Baja Hussein, Imam; Noorhidana, Vera Agustriana; Isneini, Mohd.
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 8 No. 3 (2020): Edisi September 2020
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v8i3.1385

Abstract

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.
Peran Semen Portland Tipe I dan Portland Komposit Atas Ketidaksesuaian Perkembangan Kuat Tekan Pada Beton Normal Terhadap PBI 1971 Yonanda, Prima Sandy; DWSBU, Chatarina Niken; Noorhidana, Vera Agustriana
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 8 No. 3 (2020): Edisi September 2020
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v8i3.1452

Abstract

The code about concrete compressive strength progress is presented on Table 4.1 of PBI 1971. But the concrete compressive strength development in many current concrete construction projects often face one similar major problem which is the incompability between concrete compressive strength progress compared to PBI 1971. To identify that problem, this research was done by creating 160 cube concrete samples from OPC and 120 cube concrete samples from PCC by using 4 different PCC and OPC brands that consist of Dynamix, Baturaja, Tigaroda and Padang. Moreover, the samples are consists of 2 different targeted concrete compressive strength which are K250 and K400 and the samples were tested in the age of 7, 14, 21, 28 and 56 days. Aside of that, the chemical properties in each of used cements that consist of Tricalcium Silicate (C3S), Dicalcium Silicate (C2S), Tricalcium Aluminate (C3A) and Tetracalcium Aluminoferrit (C4AF) were also tested to identify the impact of chemical properties of cements to the compressing strength progress of all samples.Based on the research, it was identified that the chemical properties of cements that consist of C3S, C2S, C3A and C4AF were very influential in the process of compressive strength progress of all samples. In addition, the coeffiecients presented on SNI-15-2049-2015 Chapter 5 Table 5 used to calculate the percentage of C3S, C2S, C3A and C4AF need further reviews. Last, it was known that the compressing strength development of both OPC and PCC samples were not aligned to the PBI 1971 estimation. Besides, the procedure of all samples have followed the British Standard and ASTM regulation. In conclution, based on the research PBI 1971 was no longer relevant to be used as the reference for concrete compressing strength progress. Keywords: Concrete, compressive strength progress, cement chemical properties, incompability, tricalcium silicate, dicalcium silicate, tricalcium aluminate, tetracalcium aluminoferrite.
Kuat Lekat Beton dengan Variasi Umur Beton, Kekasaran Permukaan, Kelembapan dan Mutu Beton Andhini, Vania Meutia; Noorhidana, Vera Agustriana; Alami, Fikri
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 8 No. 4 (2020): Edisi Desember 2020
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v8i4.1566

Abstract

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.
Pengaruh Variasi Serat Polypropylene dan Faktor Air Semen Pada Uji Kuat Tekan, Kuat Tarik Belah dan Kuat Lentur Self Compacting Concrete (SCC) Gusti, Melinda; Noorhidana, Vera Agustriana; Irianti, Laksmi
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 9 No. 1 (2021): Edisi Maret 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v9i1.1683

Abstract

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.
Evaluasi Kinerja Struktur Gedung Bertingkat dengan Metode Analisis Time History (Studi Kasus: Apartemen Kingland Avenue Serpong) Putra, Mayka Purnama; Isneini, Mohd.; Noorhidana, Vera Agustriana
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 9 No. 1 (2021): Edisi Maret 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v9i1.1720

Abstract

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.
Co-Authors Agustin, Cahyani Putri Andhini, Vania Meutia Andi Setiawan Anggraeni, Sylvia Dewi Calosa, Evanthe DWSBU, Chatarina Niken Eddy Purwanto Endro Prasetyo Wahono Fikri Alami Fikri Alami Gusti, Melinda Halawa, Vince Nukrisman Hasti Riakara Husni Hussein, Imam Isneini, Mohd Isneini, Muhammad karami, muhammad Laksmi Irianti Laksmi Irianti Irianti Masdar Helmi Mohd. Isneini Putra, Asyrofi Miranda Putra, Mayka Purnama Putri, Nur Mila Putri, Yoleta Tri Rahmanisa, Laila Indah Ratna Widyawati Riana, Netta Ristama, M Alvany Veschonanda Sahast, Corry Jayaputri Sasana Putra, Sasana Suma, Damas Novalda Suri, Yola Andara Pratami Surya Sebayang Tas'an Junaedi Junaedi Ulini'am, Adipati Syahidullah Utami, Tri Ratna Yonanda, Prima Sandy