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Studi Karakteristik Fondasi Pelat Tipis Dengan Pengaku Tiang “+” Pada Tanah Granuler Melalui Uji Eksperimen Dan Analisis Pemodelan Menggunakan Software Abaqus: Study of Characteristics of Thin Plate Foundation with Stiffener "+" in Granular Soil through Experimental Test and Analysis Modeling Using Abaqus Software Firman Syarif; Agus Darmawan Adi; Ashar Saputra
JURNAL SAINTIS Vol. 17 No. 2 (2017)
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1271.702 KB)

Abstract

[EN] The amount of damage that happened in Indonesian road is the impact of high traffic load exceeds the carrying capacity of the pavement. To reduce the problems that occur on the pavement the good systems of pavement are built, various studies conducted to produce a creative innovation in order to evaluate and improve the performance of the pavement system. this study has developed a new system of foundation with pile "+" to make the connection between plate and minipile (joint) becomes better. In this study, three models of foundation will be tested by loading test (following ASTM D 114 381 and ASTM D 3689 Pile Under static axial compressive load) to observe and analyze the behavior of the foundation model by loading centric and eccentric. In addition to laboratory tests this research also modeling analysis with Abaqus software to observe and analyze the behavior of the foundation model in terms of deformation and settlement. The results showed the distances between pile and pile provides a significant contribution in reducing the settlement in the foundation when given a maximum load of 20 kN, where is the foundation 1 had short distance between the other foundation the deformation and settlement is the smallest. The length of pile also give significant contribution to reduce the settlement like in foundation 3 that have 20 cm length of the pile have settlement and deformatioan smaller than the foundation 2 that have 10 cm length of the pile
KORELASI KUAT TEKAN TERHADAP KAPASITAS GESER BALOK BETON DENGAN VARIASI PERAWATAN Elviana Elviana; Ashar Saputra; Djoko Sulistyo
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 15, No 2 (2019): Desember
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (782.603 KB) | DOI: 10.21831/inersia.v15i2.28567

Abstract

ABSTRACTThe beam material in the construction world is designed to withstand collapse due to bending, diagonal drag, and sliding. Shear behavior in design becomes a very complex problem and is not easy to predict. However, failure due to the influence of shear forces is avoided in the design world due to damage that occurs without prior precautions, so that building users do not have the opportunity to save themselves. The study of variables that determine shear forces is a contradictory debate. One of the influential variables is the compressive strength of concrete (fc’). This work examines the correlation of compressive strength to the shear capacity of concrete beams with variations in care because there is still very little literature in Indonesia that studies the relationship of the two variables. Tests carried out on beams with reinforcement and without reinforcement which have pxlxt size is 1000x200x400 mm by getting the behavior of the point load at the center of the span (three-point load). Maintenance variations are carried out by testing in wet conditions as material representation in water construction and dry conditions for ordinary buildings. After 150 days of study, it was found that the compressive strength of concrete had a higher correlation with the strength of the concrete at the time of cracking (Vcr) than the strength of ultimate concrete (Vu). Wet conditions will produce lower strength than linear conditions with linear correlation levels of both.Keywords: concrete, compressive strength, shear strength, concrete treatment ABSTRAK Material balok dalam dunia konstruksi dirancang untuk tahan terhadap keruntuhan akibat lentur, tarik diagonal, dan geser. Parilaku geser dalam perancangan menjadi permasalahan yang sangat kompleks dan tidak mudah untuk diprediksi. Namun demikian kegagalan karena pengaruh gaya geser sangat dihindari dalam dunia perancangan dikarenakan kerusakan yang terjadi tanpa didahului dengan peringatan terlebih dahulu, sehingga pengguna bangunan tidak memiliki kesempatan untuk menyelematkan diri. Pengkajian mengenai variabel yang menentukan kekuatan geser menjadi sebuah perdebatan yang kontradiktif. Salah satu variabel yang berpengaruh adalah kekuatan tekan beton (fc’). Penelitian ini mengkaji mengenai korelasi kuat tekan terhadap kapasitas geser balok beton dengan variasi perawatan dikarenakan masih sangat sedikit literatur di Indonesia yang melakukan pengkajian hubungan kedua variabel tersebut. Pengujian dilakukan pada balok dengan tulangan dan tanpa tulangan yang memiliki ukuran pxlxt adalah 1000x200x400 mm dengan mendapatkan perilaku beban titik di pusat bentang (three-point load). Variasi perawatan dilakukan dengan melakukan pengujian pada kondisi basah sebagai representasi material pada konstruksi bangunan air dan kondisi kering untuk bangunan biasa. Setelah dilakukan pengkajian selama 150 hari diperoleh hasil bahwa kuat tekan beton memiliki korelasi lebih tinggi terhadap kekuatan beton pada saat retak (Vcr) daripada kekuatan beton ultimit (Vu). Kondisi basah akan menghasilkan kekuatan yang lebih rendah dari kondisi kering yang linier dengan tingkat korelasi keduanya. Kata kunci: beton, kuat tekan, kuat geser, perawatan beton
KUAT TEKAN PANEL DINDING BETON RINGAN EXPANDED POLYSTYRENE DENGAN LAPIS LUAR PAPAN KALSIUM SILIKAT Desi Maryani; Ashar Saputra; Andreas Triwiyono
TEKNISIA Vol. XXIV, No. 1, Mei 2019
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknisia.vol24.iss1.art1

Abstract

The need for housing in Indonesia reaches around 1 million houses per year is the reason behind an increasing demand for building materials. Prefabricated wall panels can be used as alternative building materials that have easy and fast advantages in installation. In addition, the use of precast wall panels will also save labor costs. In this study, expanded polystyrene (EPS) lightweight concrete wall panels were a composite with calcium silicate boards. Furthermore, the unity of these materials are called a sandwich panel. The purpose of this study was to determine the potential use of sandwich panels as structural wall panels in terms of compressive strength. Test specimens were 9 EPS panels measuring 1800x610x75mm; 3 of them were a composite with GRC board, 3 other with GRC board outer layer and bolt connector, and 3 panels without reinforcement. The used calcium silicate board is a trade name of GRC board with a thickness of 4mm. Compressive strength testing is carried out referring to SNI 03-3122-1992 (Fibrous Lightweight Concrete Panel).The test results obtained the compressive strength of PP-T, PGP-T, PGB-T panels in a row of 0.72 MPa, 0.84 MPa, and 1.43 MPa. The pattern of damage to the test object was marked by the release of the outer layer of the GRC board and the wall panel was fractured. It can be concluded that the addition of the GRC board outer layer and bolt connector can increase the compressive strength of the wall panel up to 200%. In contrast, the PP-T, PGP-T, and PGB-T panels do not meet the requirements of SNI 03-3122-1992. The resulted compressive strengths are so low that make the expanded polystyrene concrete panel is not avaiable for bearing wall purpose.
KUAT LENTUR PANEL DINDING EXPANDED POLYSTYRENE DENGAN PERKUATAN KALSIUM SILIKAT DAN PENYAMBUNG GESER BAUT Bella Lutfiani Al Zakina; Ashar Saputra; Ali Awaludin
TEKNISIA Vol. XXIV, No. 2, November 2019
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknisia.vol24.iss2.art1

Abstract

Started from an innovative construction system programmed by the government to provide residential homes in 2007 that is the use of expanded polystyrene concrete as a wall construction. This type of construction provides advantages that can reduce the risk of damage in the earthquakes because it has a relatively light weight which is one of the requirements for earthquake resistant houses. For this reason, the bearing capacity of the wall panel is increased to become an earthquake resistant wall using reinforcement layers. Variations on this research are expanded polystyrene concrete panels without reinforcement, with reinforcement, and with reinforcement and bolt shear connectors. Strengthening uses a reinforcement of Calcium Silicate are Kalsi board. Testing based on SNI 03-3122-1992 (Fibrous Lightweight Concrete Panel). The results showed that the average value of the panel densities was 612,57 kg/m3, the elastic modulus was 942,37 MPa, compressive strength of 2,52 MPa and water absorption capacity of 12,11%. The highest flexural strength was obtained by the panel with kalsiboard reinforcement of 1,60 MPa. This results the addition of reinforcement layers will affect the increase in strength.
KUAT TEKAN SANDWICH PANEL EXPANDED POLYSTYRENE PENAMBAHAN PLESTERAN DAN KAWAT LOKET Sustika Pratiwi; Ashar Saputra; Ali Awaludin
TEKNISIA Vol. XXV, No. 2, November 2020
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknisia.vol25.iss2.art2

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Housing needs are increase up to one million units per year. Indonesia is also one of the countries that is often affected by earthquake so that the people and Indonesian government need to work on making simple, fast and safe houses. One way is use lightweight panel walls. To increase the strength of the panel wall, reinforcement is needed. This study aims to determine the effect of adding plaster and wiremesh to the compressive strength of expanded polystyrene (EPS) sandwich panel walls. This study uses precast specimen expanded polystyrene panel walls size 180 cm × 61 cm. Consists of panel walls without reinforcement, panel walls with plaster and wiremesh space of 1 cm and 2 cm. The results of the average vertical compressive strength of the EPS panel wall obtained at 0,62 MPa, the panel with the addition of plaster and wiremesh with 1 cm space of 0,77 MPa and the highest compressive strength obtained from panel with the addition of plaster and wiremesh with 2 cm space of 0,84 MPa. The results showed that the addition of plaster and wiremesh will increase the compressive strength of expanded polystyrene sandwich panel walls.
KUAT LENTUR PANEL DINDING BETON BUSA DENGAN LAPIS GRC DAN WIREMESH Lilis Tiyani; Iman Satyarno; Ashar Saputra
TEKNISIA Vol. XXIV, No. 2, November 2019
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknisia.vol24.iss2.art2

Abstract

Lightweight concrete is high in demand as it offers lighter specific gravity which makes the load on the structure smaller. In this research, lightweight concrete was produced by mixing water, cement, sand and foam. Besides aiming to obtain lighter specific gravity, the target of this research was also to design lightweight foam concrete with compressive strength equal to the one of commonly used materials for walls of around 3-5 MPa. However, foam concrete has relatively weaker tensile strength, that it would be inadequate when it has to hold the vertical force of the wall when it is applied as wall panels. This research was conducted to examine the flexural strength of the use of GRC coating and wiremesh for wall panels. Cylinder test was performed using tools with a size of 150 mm in diameter x 300 mm in length to analyze the modulus of elasticity at 28 days old, and three cubical test tools for each variance with a size of 50 mm x 50 mm x 50 were employed to test the tensile strength at 28 days old. A number of wall panel specimens with a thickness of 50 mm, width of 400 mm and length of 800 mm were used to measure the flexural strength. The tests performed in this research resulted in modulus of elasticity of 6856,6 MPa, tensile strength of 0,7 MPa. The flexural strength of wall panels without GRC outer layer and without wiremesh reinforcement was found at 1,5 MPa. Meanwhile, the flexural strength of the wall panel with GRC outer layer without wiremesh reinforcement was found at 4,6 MPa. Finally, the wall panel applied with GRC outer layer and wiremesh reinforcement showed a flexural strength 5,3 MPa.
STUDI PENAMBAHAN STRUKTUR BETON BERTULANG MENJADI KOMPOSIT DENGAN BAJA BERGELOMBANG PADA OVERPASS PUCUNG LOR KROYA Raden Aufa Dhia Anggara; Ashar Saputra
TEKNISIA Vol. XXVI, No. 2, November 2021
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknisia.vol26.iss2.art1

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The construction of a nonlevel railway crossing in Pucung Lor Kroya was aimed to improve safety and smooth traffic between railways and roads. Increasing frequency of railways through the Double Track Railway Project of South Java demands a fast pace construction of railway crossing without disrupting any railway traffic. So, the overpass structure will be built using Corrugated Mortar Busa Pusjatan (CMP) technology with Corrugated Steel Plate (CSP) on a curve structure 1 (P1) with a 25-meter span and curve structure 2 (P2) with a 12-meters span. When construction began, planners added reinforced concrete layers until composite with CSP to increase structural capacity and became structural protectors if CSP yielded or corrosions. Overpass modeling was done using MIDAS Civil 2019 based on finite element 3D to check strength capacity and service limits. The addition of reinforced concrete structures to composites with CSP is also compared to the non-composite design of CMP Pusjatan to see the effect on internal forces, stress, and deflection of CSP although the stress on foam mortar. Based on the results, the composite design overpass analysis satisfies compression-bending and shearing capacity checks based on Ultimate Limit States (ULS-PBKT) and service limit based on Serviceability Limit State (SLS-PBL). The addition of reinforced concrete to composite with CSP increases safety factor value because CSP stresses are lower than non-composite designs. The potential collapses from foam mortar can also be reduced as the structure becomes rigid.
STUDI EKSPLORASI FAKTOR-FAKTOR KESUKSESAN PROYEK KONSTRUKSI DI INDONESIA Annisa Azhar Firdausi; Toriq arif ghuzdewan; Ashar Saputra; Akhmad Aminullah
Journal of Civil Engineering and Planning (JCEP) Vol 1 No 2 (2020)
Publisher : Program Studi Sarjana Teknik Sipil Universitas Internasional Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37253/jcep.v1i2.1493

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The high rate of growth of the construction sector in Indonesia has not been matched by its level of success. Problems are still found in many construction projects that result in project unsuccessfulness, including time loss and bad quality work. In order to support the success of construction projects in Indonesia, the aim of this study is to determine the critical factors that influence the success of construction projects in Indonesia. Data collection through questionnaires on 417 respondents who were directly involved in the project. The questionnaire was based on 4 previous studies, measured by a 5-point Likert scale of agreement and consisting of 64 project success variables. The analysis was performed using the Exploratory Factor Analysis (EFA). The results of this study indicate that there are 6 factors that influence the success of construction projects in Indonesia, namely: (1) Factors related to the Project Manager; (2) Factors related to the Contractor; (3) Factors related to Supervisors; (4) factors related to the project; (5) Factors related to Owner; and (6) Factors related to Owner2. Keywords : construction project, project success, critical success factor, EFA
PERENCANAAN KAWASAN HUNIAN KOMUNAL SEMENTARA DENGAN KONSEP MULTI-FUNGSI DALAM PERSPEKTIF PENGEMBANGAN WILAYAH KOTA PALU Anisa; Ashar Saputra; Iman Satyarno
Jurnal Tata Kota dan Daerah Vol. 14 No. 2 (2022): Jurnal Tata Kota dan Daerah
Publisher : Department of Urban and Regional Planning, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.takoda.2022.014.02.4

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Gempa bumi 2018 di Kota Palu menyebabkan kerusakan fasilitas umum dan aset masyarakat, hal ini mengharuskan para korban mengungsi ke hunian sementara hingga rumah mereka selesai direkonstruksi atau memperoleh hunian baru. Problematika masyarakat menolak relokasi, masyarakat tidak nyaman tinggal di hunian sementara, hingga pembangunan fasilitas hunian sementara yang meningkatkan biaya pembangunan. Hal ini memecah fokus rehabilitasi dan rekonstruksi. Berdasarkan fenomena tersebut dapat disimpulkan bahwa dalam situasi darurat regulasi tidak lagi diprioritaskan, sehingga fasilitas penting seperti hunian sementara perlu dipersiapkan secara matang. Penelitian ini bertujuan merencanakan sistem fasilitas hunian sementara dengan konsep multi-fungsi. Pengumpulan data dilakukan dengan survey instansional, pengisian kuesioner, dan mengkaji pustaka. Penelitian ini dilakukan secara kuantitatif dengan menggunakan metode Analisis Hirarki Proses (AHP), dimana peneliti menggunakan kriteria dari 4 Stakeholder untuk menentukan lokasi alternatif yang cocok dikembangkan menjadi kawasan hunian komunal sementara. Penelitian ini juga mengkolaborasikan analisis klasifikasi tingkat bahaya dan klasifikasi kepadatan penduduk. Hasil dari penelitian ini menunjukkan bahwa kawasan hunian komunal sementara terdiri atas tiga hirarki yaitu Kecamatan Mantikulore sebagai Pusat hunian komunal sementara. Kecamatan Palu selatan, Kecamatan Tatanga dan Kecamatan Ulujadi, Kecamatan Palu Utara, dan Kecamatan Tawaeli akan menjadi Sub-pusat pelayanan hunian komunal sementara.  adapun Kecamatan Palu Barat dan Kecamatan Palu Timur menjadi kawasan terlayani. Kata Kunci : huntara, hirarki pelayanan, multifungsi, Kota Palu
Pengaruh Pemberian Camber Terhadap Perilaku Jembatan Komposit Beton Dengan Gelagar Boks Baja Urwatul Wusqo; Ashar Saputra
Potensi: Jurnal Sipil Politeknik Vol 25 No 1 (2023): Potensi: Jurnal Sipil Politeknik
Publisher : Department of Civil Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/potensi.v25i1.5262

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Camber biasanya diberikan pada jembatan untuk mengantisipasi terjadinya lendutan berlebih saat jembatan mulai beroperasi. Pada jembatan baja yang umumnya tersusun dari komponen pelat baja yang tipis, pemberian camber pada jembatan juga akan mempengaruhi perilaku jembatan secara keseluruhan. Penelitian ini bertujuan untuk mengidentifikasi pengaruh pemberian camber pada jembatan gelagar boks baja terhadap lendutan, frekuensi alami, dan tegangan yang terjadi pada jembatan. Jembatan gelagar boks baja dengan panjang 64 meter dimodelkan menggunanakan perangkat lunak SAP2000. Tinggi camber yang diberikan pada jembatan antara lain 0,7m, 0,8m, 0,9m, 1m, dan 1,1m. Lendutan jangka panjang dihitung menggunakan 3 cara yaitu metode Bridge Management System (BMS), model Branson, dan SNI 2847:2013. Hasil penelitian menunjukkan bahwa pemberian camber pada jembatan meningkatkan kekakuan jembatan, yang diindikasikan dengan penurunan nilai lendutan dan peningkatan nilai frekuensi alami jembatan. Selain itu, pemberian camber pada jembatan dapat mereduksi nilai tegangan dan gaya geser yang terjadi pada jembatan.