Articles

Found 28 Documents
Search

Studi Eksperimental Perbandingan Nilai Faktor Reduksi (φ) Profil Baja Tabung Kotak di Indonesia Rasidi, Nawir
Journal of Mathematical and Fundamental Sciences Vol 37, No 2 (2005)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (700.853 KB) | DOI: 10.5614/itbj.sci.2005.37.2.5

Abstract

At present, structural designing in Indonesia uses the value of reduction factor (φ) according to LRFD-AISC regulation (Load and Resistance Factor Design – American Institute of Steel Construction). It is understood that different condition in Indonesia requires different approach, therefore this research attempted to determine a specific value of reduction factor (φ).The research observes the compression and flexural behavior of profile steel boxes (2x4) cm with length 75 cm and 65 cm for compression and flexural test, respectively. This test collects resistance data that are stress, area of steel, load and modulus of elasticity. The result of flexural test with reliability index (β) = 3 obtained the value of reduction factor of flexure φb = 0.8823 and φ = 0.5195 for compression test. Difference between this value and that of LRFD-AISC code were caused by nominal mean value-mean value ration, coefficient of variation (Ω), and the distribution used in the calculation. In addition, different reliability index of 2.5, 2, and 1.5 were also calculated for comparison. It is concluded that greater value of reduction factor (φ) could be obtained with smaller reliability index (β).
PENGARUH ABU AMPAS TEBU SEBAGAI ALTERNATIF PENGGANTI PORTLAND CEMENT (PC) FC’=19 MPA TERHADAP KUAT TEKAN DAN KUAT TARIK BETON) Koi, Damianus; Rasidi, Nawir
eUREKA : Jurnal Penelitian Teknik Sipil dan Teknik Kimia Vol 3, No 2 (2019): EDISI DESEMBER 2019
Publisher : Universitas Tribhuwana Tunggadewi Malang

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

Abstract

Abu ampas tebu (AAT) yang berasal dari PT. PG Kebon Agung Kota Malang merupakan limbah yang memiliki kandungan silikat sebesar 68,5 %. Penelitian terhadap AAT dilakukan sebagai bahan substitusi parsial semen dengan prosentase secara berturut-turut 0%, 7%, 9%, 13%, 15% terhadap berat semen. Penelitian ini bertujuan untuk mengetahui pengaruh AAT terhadap kuat tekan dan kuat tarik beton lentur dan Penggunaan air untuk campuran beton dalam penelitian ini dibuat sama untuk setiap prosentase AAT. Hasil penelitian menunjukkan semakin tinggi prosentase AAT maka semakin rendah workability beton segar. Penggunaan AAT tidak mempengaruhi peningkatan kuat tarik lentur tetapi memberi peningkatan pada modulus elastistas dan kuat tekan. Modulus elastisitas beton dengan AAT lebih besar dari beton tanpa AAT kecuali pada prosentase 15%. Kuat tekan yang diperoleh melebihi kuat tekan yang direncanakan dan peningkatan terbesar terjadi pada Prosentase 9%. secara keseluruhan AAT dapat dimanfaatkan sebagai bahan substitusi parsial semen dalam campuran beton dengan prosentase optimum pada prosentase 9% berdasarkan kekuatan dan workabilitynya. Kata kunci: ampas tebu, kuat tekan, kuat tarik beton, prosentase optimum. ABSTRACT Ash bagasse (AAT) originating from PT. PG Kebon Agung Malang is a waste that has silicate content of 68.5%. The study of AAT was performed as partial substitution material of cement with percentage successively 0%, 7%, 9%, 13%, 15% to the weight of cement. This study aims to determine the effect of AAT on the compressive strength and tensile strength of concrete bending and Water use for concrete mixture in this study is made equal for every AAT percentage. The results showed the higher the percentage of AAT, the lower the workability of fresh concrete. The use of AAT does not affect the increase in tensile strength of tensile but gives an increase in the elastic modulus and compressive strength. The modulus of elasticity of concrete with AAT is greater than concrete without AAT except in percentage 15%. The compressive strength obtained exceeds the planned compressive strength and the greatest increase occurs in Percentage 9%. overall AAT can be utilized as partial substitution material of cement in concrete mixture with optimum percentage at 9% percentage based on strength and workability.
PENGARUH PENGGANTIAN PASIR LUMAJANG DENGAN PASIR ERUPSI GUNUNG KELUD TERHADAP KUALITAS MORTAR Rasidi, Nawir; Ningrum, Diana
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 1, No 1 (2016)
Publisher : Universitas Tribhuwana Tunggadewi Malang

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

Abstract

Mortar serves to increase the resilience of the bond and the bond with a constituent part of this part of the construction. Mortar strength depends on the cohesion of the cement paste to aggregate the fine particles. This study use traditional testing methods for analyzing the compressive strength marshall mortar with a variation of 0%, 50% and 100%, the age of 7 days, 14 days, and 28 using the composition 1pc: 3PS, 1pc: 4Ps, and 1pc: 6ps. Making the test object to the composition of the test object 5 0% for sand Lumajang, 50% sand and Kelud Lumajang, and 100% sand Kelud. Implementation phases include testing of materials, namely water, cement, and sand. Pengujan mortar composition 1pc: 3PS, 1pc: 4Ps, and 1pc: 6 Ps age of 28 days, the mean value obtained Lumajang sand 307,20kg / cm², 257,60kg / cm² and 96.80 kg / cm², sand Lumajang and kelud of 338 , 40kg / cm², 124,80kg / cm², and 60,80kg / cm², and the use of sand kelud 212.00 kg / cm², 151.20 kg / cm², and 41.60 kg / cm². While the water absorption at 28 days average composition 1pc: 3pasir Lumajang by 1.29%, sand Lumajang and kelud of 1.85%, and sand kelud by 1.64%. Composition 1pc: 4 by 1.62% Lumajang sand, sand and sand kelud Lumajang by 3.44% and amounted to 3.15% kelud sand. KomPsisi 1pc: 6 amounted to 2.96% Lumajang sand, sand Lumajang and kelud by 4.68% and amounted to 5.49% kelud sand.
Studi Kelayakan Pasir Handel dan Krikil dari Kali Wae Longge di Kabupaten Manggarai Barat Sebagai Salah Satu Material Beton Mutu Fc 19,3 MPA Gungto, Benediktus; Ningrum, Diana; Rasidi, Nawir
eUREKA : Jurnal Penelitian Mahasiswa Teknik Sipil dan Teknik Kimia Vol 2, No 2 (2018)
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (440.106 KB)

Abstract

ABSTRAK Handel dan Wae Longge adalah lokasi tambang dan juga pemasok bahan bangunan terbesar di Kabupaten Manggarai Barat, yang sebagai bahan beton. Agregat harus memenuhi berbagai persyaratan teknis, tetapi bahan dari Handel dan Kali Wae Longge tidak diketahui kualitas atau kelayakannya. Penelitian ini dilakukan di laboratorium dengan beton kubus 15 x 15 cm untuk mengetahui kekuatan tekan benda uji beton dan silinder dengan ukuran 15 x 30 cm untuk kekuatan tarik beton. Dimana untuk kekuatan tekan beton dibuat 9 buah benda uji dan kuat tarik dari beton 7 lembar spesimen dengan perbandingan campuran 1 semen: 1,88 Pasir: 2,82 Kerikil. Hasil pengujian pada agregat halus Handel menunjukkan bahwa pasir memasuki gradasi zona I, kadar air adalah 4,61%, bulk density 2,31, berat jenis SSD 2,42, penyerapan 4,63%, Mbb3 3,04, kandungan berat 1,29, dan agregat kasar dari waktu Wae Longge menunjukkan bahwa 1,35 kadar air, bulk density 2,1, gravitasi spesifik dari SSD 2,19, penyerapan 4,64%, MHB 7,99, berat konten 1,33. Kuat tekan beton pada 7 hari diubah menjadi 28 hari dengan 26,39 N / mm², kekuatan tarik 4,52 N / mm². Kata kunci: Agregat Kwaliats; Pers Kuat dan Tarik; Manngarai Barat. ABSTRACT Handel and Wae Longge times is the location of mine and also the largest building material supplier in Manggarai Barat regency, which is as a concrete material. Aggregates must meet various technical requirements, but the material from Handel and Kali Wae Longge is not known the quality or feasibility. This research was conducted in laboratory with concrete cube 15 x 15 cm to know the compressive strength of concrete and cylindrical test object with size 15 x 30 cm for tensile strength of concrete. Where for the compressive strength of concrete made 9 pieces of test specimens and tensile strength of concrete 7 pieces of specimens with Comparison of mixture of 1 cement: 1.88 Sand: 2.82 Gravel. The test results on the fine aggregate of Handel showed that sand entered the gradation of zone I, moisture content was 4.61%, bulk density 2.31, specific gravity of SSD 2.42, 4.63% absorption, Mbb3 3.04, weight content of 1.29, and coarse aggregate from time Wae Longge showed that 1.35 moisture content, bulk density 2.1, specific gravity of SSD 2.19, absorption of 4.64%, MHB 7.99, weight of content 1.33. Compressive strength of concrete at 7 days is converted to 28 days by 26.39 N / mm², tensile strength of 4.52 N / mm². Keywords : Aggregate Kwaliats; Strong Press and Tensile; Manngarai Barat.
Perencanaan Tebal Lapisan Perkerasan Tambahan (Overlay) Pada Ruas Jalan Tidar Kelurahan Karangbesuki, Kecamatan Sukun, Kabupaten Malang AMARAL MAGNO, BERNARDINA FATIMA; Rasidi, Nawir; Arifianto, Andi Kristafi
eUREKA : Jurnal Penelitian Mahasiswa Teknik Sipil dan Teknik Kimia Vol 1, No 2 (2017)
Publisher : Universitas Tribhuwana Tunggadewi Malang

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

Abstract

The road has a lifespan of service life or the planlife. If the age of service ability has been exceeded, it is needed for an additional layer (overlay) to rejuvenate the structure pavement. Overlays are used as road maintenance to improve pavement structure which decreased. The existence of the highway is needed to support the mobility of freight and people who was crossing the road, which is growing requirement for leveled against transportation to Karangbesuki village. Based on the conditions of location studies, the planning of supplement pavement layer thickness (Overlay) on the Road Section of Karangbesuki village is intended to support economic growth with increasing demand of transport means that can be launched transport in the Karangbesuki Village and development capacity and quantity of vehicles which is connecting the Karangbesuki village, limited sources of funding for highway construction and operation of the traffic infrastructure is not optimal are the main issue in the Karangbesuki Village, Malang. Research conducted in the Karangbesuki Village on June 2015. This study can be obtained arrangement pavement thickness consisting of a subbase (Sub Base) thick 20 cm, 15 cm thick of foundation above, the surface layer of pavement layers 3 cm long and additional layer of Asphalt Macadam. To keep against cracks on highway body encouraged to the public, in onder to not throw away the frash in the side of highway, so causing cracks in the road body and hold regular maintenance by the related department and the public. Keywords: Layer Thickness, Supplement Pavement (Overlay), Karangbesuki Village ABSTRAK Jalan memiliki umur layan atau umur rencana. Jika umur layan telah terlampaui, maka perlu adanya suatu lapisan tambahan (overlay) untuk meremajakan struktur perkerasan. Overlay digunakan sebagai pemeliharaan jalan untuk meningkatkan struktur perkerasan sudah menurun. Keberadaan jalan raya sangat di perlukan untuk menunjang mobilitas angkutan barang dan manusia yang melintasi pada jalan tersebut sering meningkatnya kebutuhan sarana transportasi yang dapat melancarkan transportasi di kelurahan karangbesuki. Berdasarkan kondisi yang ada dilokasi studi, Perencanaan Tebal Lapisan Perkerasan Tambahan (Overlay) Pada Ruas Jalan Tidar Kelurahan Karangbesuki, ini dimaksudkan untuk menunjang laju pertumbuhan ekonomi sering dengan meningkatnya kebutuhan sarana transportasi yang dapat melancarkan transportasi di Kelurahan Karangbesuki dan Perkembangan kapasitas maupun kwantitas kendaraan yang menghubungkan Kelurahan Karangbesuki terbatasnya sumber dana untuk pembangunan jalan raya serta belum optimalnya pengoperasian prasarana lalu lintas yang ada, merupakan persoalan yang utama di Kelurahan Karangbesuki, Kabupaten Malang. Penelitian dilaksanakan di Kelurahan Karangbesuki, pada bulan Juni 2015. Metode yang digunakan dalam studi ini adalah Metode Bina Marga dapat di peroleh susunan tebal perkerasan terdiri dari pondasi bawah (Sub Base) tebal 20 cm, pondasi atas tebal 15 cm, lapisan permukaan 3 cm lapisan perkerasan lama dan Aspal Macadam lapisan tambaha 2 cm. Untuk menjaga agar tidak terjadi retak pada tubuh jalan maka dihimbau kepada masyarakat agar tidak menbuan kotoran pada saluran yang ada di sisi kiri kanan jalan akibat banjir sehingga menyebabakan retak pada tubuh jalan dan mengadakan pemeliharaan secara rutin oleh dinas terkait dan juga masyarakat. Kata kunci : Perencanaan Tebal, Lapisan Perkerasan Tambahan (Overlay)
PERENCANAAN GEDUNG PERKULIAHAN 3 LANTAI DENGAN PONDASI SARANG LABA-LABA DI UNIVERSITAS TIMOR (TTU) Palbeno, Wilfridus; Rasidi, Nawir; Pandulu, Galih Damar
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 3, No 1 (2018)
Publisher : Universitas Tribhuwana Tunggadewi Malang

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

Abstract

University of Timor is one of the educational institutions located in Central Timor Regency (NTT) and very important role in improving human resources. In this thesis, taking the topic of planning the building on the foundation of the cobwebs. The foundation cobweb is a combination of conventional substructure which is a blend of flat concrete slab foundation constantly filled with soil improvement so that it becomes an integral composite reinforced concrete. These systems are specifically use the land as part of the foundation structure. This study aims to determine the strength of the foundation ksll meet q_a(Raft Foundation) < q_a(Foundations KSLL) and the cost required. The parameters used are from the test results sondir. The analysis starts from determining soil classification and load analysis. Then calculate the bearing capacity of the foundation, the maximum ground voltage, decrease, equivalent thickness, reinforcement dimensions ksll and budget plan (RAB) In University Timor East Timor Regency North. The results of the analysis of the maximum loading of 306.465 tons. Calculation of ground voltage due to the load of the building q = 5.352 tons / m². Calculation of the effective soil pressures (po) = 3.5022 or at 35.022 kn / m². Calculation of reduction / settlement total is 1.99 cm. Equivalent thickness of rib construction / settlement t_e = 134.5 cm. High-rib construction / settlement is 1.70 m. While the load distribution rib area construction / settlement is 5.81 t / m². Control of the shear reinforcement rib construction is s
MANAJEMEN METODE PELAKSANAAN PADA KONSTRUKSI BAJA MODEL “SPACE FRAME” PROYEK TERMINAL 3 ULTIMATE BANDAR SOEKARNO HATTA Rofiudin, Mochammad; Rasidi, Nawir; Pandulu, Galih Damar
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 2, No 2 (2017)
Publisher : Universitas Tribhuwana Tunggadewi Malang

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

Abstract

Commence a project ultimate terminal 3 Soekarno-Hatta airport Cengkareng, Jakarta, there are two important factors i.e. time factor and rescheduled work. This two factors are so need to be optimized by putting items together effectively, either before and after construction. Management system construction reference to the assumption that an implementation of the project can be implemented with the integrated system approach and the consistent of processes by the stage project implementation, if very stage process of system was done optimization against any problem. Time as one of main variables determine success or failure a project. The owners project expects net operation or the production of project have done. The sooner finished a project, the sooner ‘return of investment’ and the profit gained. The case that will be reviewed is an important of construction management system for handling a large project. From planning and control work time until they reached time of development projects effectively. Recommended to the community that construction management is one of alternative to reach particular purpose limited by time and resources. Understanding a construction project was an attempt to achieve a results in a building form desired and maximum profit.
ANALISIS ALTERNATIF PERKUATAN JEMBATAN RANGKA BAJA (STUDI KASUS : JEMBARAN RANGKA BAJA SOEKARNO-HATTA MALANG) Gusman S.W, Lalu; Rasidi, Nawir; Ningrum, Diana
eUREKA : Jurnal Penelitian Mahasiswa Teknik Sipil dan Teknik Kimia Vol 1, No 1 (2017)
Publisher : Universitas Tribhuwana Tunggadewi Malang

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

Abstract

Jembatan merupakah sebuah struktur yang sangat penting sebagai penghubung jalan yang terputus akibat rintangan-rintangan. Dengan semakin meningkatnya beban yang diterima jembatan dan umur jembatan semakin sedikit ataupun habis, menyebabkan kekuatan berkurang dan terjadinya lendutan yang maksimal. Diperlukan rehabilitas dengan cara memperkuat konstruksi, salah satu caranya adalah memberikan prategang eksternal yang akan melawan lendutan yang terjadi. Dari hasil analisis menggunakan STAAD Pro terhadap jembatan suhat bentang 60 meter didapatkan besar lendutan terhadap beban mati dan beban hidup sebesar 11,72 cm dengan lendutan maksimum izin 6 cm maka lendutan yang terjadi melebihi lendutan yang diizinkan sehingga perlu dilakukan perkuatan dengan cara prategang eksternal. Dua buah model perkuatan prategang eksternal yang dilakukan yaitu prategang eksternal tanpa batang penyokong dan prategang eksternal dengan batang penyokong. Dengan model pertama didapatkan besar lendutan yang memenuhi syarat aman yaitu sebesar 58,489 mm (kebawah) dengan gaya prategang yang harus diberikan adalah 10.000 kN dengan strand gabungan terdiri dari 7 buah tendon, 1 tendon terisi 7 buah kawat strand berdiameter 15,25. Untuk kondisi lendutan akibat beban mati dan gaya prategang adalah sebesar 6,173 mm (kebawah). Sedangkan untuk model kedua didapatkan besar lendutan yang memenuhi syarat aman yaitu sebesar 54,649 mm (kebawah) dengan gaya prategang yang harus diberikan sebesar 7.000 kN dengan strand gabungan terdiri dari 7 buah tendon, 1 tendon terisi 7 buah kawat strand berdiameter 12,27 mm. Untuk kondisi lendutan akibat beban mati dan gaya pratengan saja didapatkan sebesar 2,334 mm (kebawah). Dari kedua model perkuatan tersebut dapat memberikan keamanan kepada jembatan rangka baja tersebut, namun dari kedua model tersebut model yang paling efisien adalah model kedua yaitu prategang eksternal dengan batang penyokong dikarenakan dengan gaya prategang yang kecil dan diameter yang kecil dapat memberikan lawan lendutan yang lebih aman dari pada model kedua. Kata kunci: Jembatan rangka baja, perkuatan, prategang eksternal, lendutan.
HUBUNGAN ANTARA PENGELOLAAN, PENGENDALIAN SISA MATERIAL DENGAN BIAYA DAN WAKTU PENYELESAIAN PEMBANGUNAN GEDUNG PSIK DI UNIVERSITAS TRIBHUWANA TUNGGADEWI MALANG ZULKIBLI, ZULKIBLI; Rasidi, Nawir; Arifianto, Andi Kristafi
eUREKA : Jurnal Penelitian Mahasiswa Teknik Sipil dan Teknik Kimia Vol 1, No 2 (2017)
Publisher : Universitas Tribhuwana Tunggadewi Malang

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

Abstract

The construction project is closely related to construction materials. In the implementation of construction projects will certainly lead to the rest of the material. Waste materials sizeable appearing which one of them due to the use of materials that are less effective and efficient, so it can certainly be swelling, especially in the finance sector. Not only that, when waste materials has not be managed properly then it will have an impact on sustainability and an environmental damage around. The purpose of this research is to minimize the cost and time by way of the management and controlling of waste material, especially in the iron material of concrete, cement, sand, brick, gravel, ceramic. Data were obtained from: (1) direct observation in the field around the development projects in the form of direct counting and documentation of waste material on the ground; (2) The survey questionnaire respondents are contracting staff, among others are, field supervisors, foremen, consultants, supervisors, and workers. The results showed that: The percentage of the remaining cost of the largest material studied during the project implementation comes from Concrete steel material valued at IDR 5.4838 million, the total responses to questionnaires each type of waste material under study is the largest sand material waste by 19.68%, the percentage of remaining charge the material can not be used towards the cost of materials required field amounted to 4.9%, the percentage of the total cost of waste material to the total cost of the project amounted to 1.87% and the total results of the questionnaire in the field based on the source and cause of the largest waste material is (X3) handling factor amounting to 35.75%. Besides efforts to reduce material waste in the ground is a good material management methods. Keywords: Waste material, material management, the category of waste material.
PENGARUH VARIASI KETEBALAN PELAT PANEL KOMPOSIT BAMBU SPESI TERHADAP KUAT LENTUR BETON DENGAN TULANGAN BAMBU ORI Pereira, Augusto Manuel; Ningrum, Diana; Rasidi, Nawir
eUREKA : Jurnal Penelitian Mahasiswa Teknik Sipil dan Teknik Kimia Vol 1, No 1 (2017)
Publisher : Universitas Tribhuwana Tunggadewi Malang

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

Abstract

Progress in the field of science and technology in the field of construction resulted in the necessity of building materials increasingly meningkat.Maka needed an alternative building materials that are resistant to earthquakes. One type of material that is resistant to earthquakes are bamboo ori. Ori Bamboo is one of the alternative role of reinforcing steel in a structure, this is because bamboo has a firmness pull ori whose value is almost equivalent to medium-quality steel. Based on the flexural strength test results showed that the test specimen plate, is the smallest deflection plate thickness of 9 cm and the largest deflection plate thickness of 7 cm. While the maximum load that can be retained by plate size 50 cm x 30 cm by 9 cm thick and bamboo reinforcement Ori is 18 KN or 1800 kg with a deflection which varies from 1.95 mm - 3.05 mm. It can be concluded that the strength of the concrete slab with reinforcement ori bamboo can be used on the floor plate of the building structure replaces steel reinforcement. Keywords: Pull Strong, Strong bending, Bamboo, Variation, Concrete ABSTRAK Kemajuan di bidang ilmu dan tekonologi pada bidang konstruksi mengakibatkan kebutuhan pada bahan bangunan semakin meningkat.Maka dibutuhkan suatu alternatif bahan bangunan yang tahan terhadap gempa. Salah satu jenis bahan yang tahan terhadap gempa adalah bambu ori. Bambu ori merupakan salah satu alternatif pengganti peran baja tulangan pada suatu struktur, hal ini dikarenakan bambu ori memiliki keteguhan tarik yang nilainya hampir setara dengan besi baja berkualitas sedang. Berdasarkan hasil pengujian kuat lentur benda uji pelat menunjukan bahwa, lendutan yang terkecil adalah Pelat ketebalan 9 cm dan lendutan yang terbesar adalah Pelat ketebalan 7 cm. Sedangkan beban maksimum yang dapat ditahan oleh pelat ukuran 50 cm x 30 cm dengan tebal 9 cm dan tulangan bambu Ori adalah sebesar 18 KN atau 1800 Kg dengan lendutan yang bervariasi mulai 1,95 mm – 3,05 mm. Maka dapat disimpulkan bahwa kekuatan pelat beton dengan tulangan bambu ori bisa digunakan pada struktur bangunan pelat lantai menggantikan tulangan Baja. Kata Kunci : Kuat Tarik, Kuat lentur, Bambu, Variasi, Beton