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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL IPTEK Journal of Proceedings Series Journal of Engineering and Technological Sciences Mekanika Jurnal Teknik Sipil Journal of Advanced Civil and Environmental Engineering Civil Engineering Dimension Portal: Jurnal Teknik Sipil JIIP (Jurnal Ilmiah Ilmu Pendidikan) Edu Sociata : Jurnal Pendidikan Sosiologi Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Jurnal Jalan Jembatan Journal of Engineering and Technological Sciences Jurnal Teknik Sipil
Iswandi Imran
Institut Teknologi Bandung
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The Behavior of Slab-Column Connections with Modified Shear Reinforcement under Cyclic Load Gunadi, Riawan; Budiono, Bambang; Imran, Iswandi; Sofwan, Ananta
Journal of Engineering and Technological Sciences Vol 46, No 1 (2014)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (742.793 KB) | DOI: 10.5614/j.eng.technol.sci.2014.46.1.2

Abstract

Generally, slab-column frames show lower stiffness, drift capacity, and ductility as compared to beam-column frames. Under combined gravity and lateral cyclic loading, the lower initial stiffness and stiffness degradation lead to poor structural performance. Therefore, in the current codes, slab-column frames are recommended only for Intermediate Moment Frames with dual systems. The objective of this study is to modify slab-column connection details to enhance seismic performance such that the system can also be used with Special Moment Frames. Four specimens of interior slab-column connection models with the same dimensions and flexural reinforcement were tested under gravity and cyclic lateral loads. One specimen, constructed as control specimen, was designed using standard orthogonal stud rails. The other specimens used newly designed stud rails. The experimental results demonstrated that the modified stud rails significantly improved the specimens’ behavior. The experimental results demonstrated that the modified stud rails significantly improve the specimen behavior. The highest ratio of initial stiffness adequacy of specimen with modified stud rail was 131.19% for risk category I/II, while the ratio of the control specimen was 97.94%. The highest relative energy dissipation ratio of specimen with modified stud rail was 33.82%, while the ratio of the control specimen was 25.94%.
Confinement of Reinforced-Concrete Columns with NonCode Compliant Confining Reinforcement plus Supplemental Pen-Binder Kristianto, Anang; Imran, Iswandi; Suarjana, Made; Pane, Ivindra
Journal of Engineering and Technological Sciences Vol 44, No 3 (2012)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (776.434 KB) | DOI: 10.5614/itbj.eng.sci.2012.44.3.2

Abstract

Abstract.  One  of  the  important  requirements  for  earthquake  resistant  building related  to  confinement  is  the  use  of  seismic  hooks  in  the  hoop  or  confining reinforcement  of  reinforced-concrete  column  elements. However, installation of a  confining  reinforcement  with  a  135-degree  hook  is  not  easy.  Therefore,  in practice, many construction workers apply a confining reinforcement with a  90-degree  hook  (non-code  compliant).  Based  on  research  and  records  of  recent earthquakes  in  Indonesia,  the  use  of  a  non-code  compliant  confining reinforcement  for  concrete  columns  produces  structures  with  poor  seismic performance.  This paper  presents a study  that  introduces  an additional element that is expected to improve the effectiveness of concrete columns confined with a non-code compliant  confining reinforcement. The additional element, named a pen-binder,  is   used to keep the  non-code compliant  confining reinforcement in place. The effectiveness of this element  under pure axial concentric loading  was investigatedcomprehensively.The  specimens  tested  in  this  study  were  18 concrete columns,with a cross-section of 170 mm x 170 mm and a height of 480 mm. The main test variables were the material type of the  pen-binder, the angle of  the  hook,  and  the  confining  reinforcement  configuration.The  test  results indicate  that  adding  pen -binders  can  effectively  improve  the  strength  and ductility of the column specimens confined with a non-code compliant  confining reinforcement. 
Experimental Study of Confined Low-, Medium- and High-Strength Concrete Subjected to Concentric Compression Antonius, Antonius; Imran, Iswandi
Journal of Engineering and Technological Sciences Vol 44, No 3 (2012)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (493.677 KB) | DOI: 10.5614/itbj.eng.sci.2012.44.3.4

Abstract

An  experimental  study  of  23  low-,  medium-  and  high-strengthconcrete  columns is presented in this paper. Square-confined concrete columns without  longitudinal  reinforcement  were  designed,  and  tested  under  concentric axial  compression.  The  columns  were  made  of  concrete  with  a  compressive strength ranging between 30 MPa and 70 MPa. The test parameters in the study are  concrete  compressive  strengths  and  confining  steel  properties,  i.e.  spacing, volumetric  ratios  and  configurations.  The  effects  of  these  parameters  on  the strength  and  ductility  of  square-confined  concrete  were  evaluated.  Of  the specimens tested in this study, the columns made with higher-strength concrete produced less strength  enhancement and ductility than those with lower-strength concrete.  The  steel  configurations  were  found  to  have  an  important  role  in governing  the  strength  and  ductility  of  the  confined  high-strength  concrete. Moreover,  several  models  of  strength  enhancement  for  confined  concrete available  in  the  literature  turned  out  to  be  quite  accurate  in  predicting  the experimental results.
On the Development of a Nomogram for Alkali Activated Fly Ash Material (AAFAM) Mixtures Simatupang, Partogi H.; Imran, Iswandi; Pane, Ivindra; Sunendar, Bambang
Journal of Engineering and Technological Sciences Vol 47, No 3 (2015)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (821.159 KB) | DOI: 10.5614/j.eng.technol.sci.2015.47.3.1

Abstract

Alkali activated fly ash material (AAFAM) has become the most promising material to substitute materials based on ordinary Portland cement (OPC). However, there is no available nomogram for AAFAM mixtures. In contrast, there are many rational methods available in the literature to make paste, mortar and concrete with OPC based materials, such as Monteiro-Helene’s nomogram, which uses Abram’s law, Lyse’s law and Molinari’s law. This paper presents a study to construct such a nomogram for AAFAM mixtures by first conducting experiments on the  paste and mortar phases. The procedure of Monteiro-Helene’s nomogram was adopted in this formulation. The first step in this direction was to find a close relationship between the strength and paste composition of the material that can be used as a substitute for Abram’s law. The second step  was  to construct the equivalent  of  Lyse’s and Molinari’s relationships by varying the sand and fly ash contents. The results show that it is possible to make a nomogram for AAFAM mixtures such as the one for OPC based materials. Class F fly ash and its mortar phase were used to construct the nomogram. In addition, the  mortar  samples  that were  used to build the nomogram had similar solidification products according to their microscopic characteristics.
Studi Eksperimental Perilaku Hubungan Pelat-Kolom terhadap Kombinasi Beban Gravitasi dan Lateral Siklis Gunadi, Riawan; Budiono, Bambang; Imran, Iswandi; Sofwan, Ananta
Jurnal Teknik Sipil Vol 19, No 3 (2012)
Publisher : Institut Teknologi Bandung

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Abstract

Abstrak. Struktur flat slab digunakan secara luas pada bangunan gedung karena beberapa kelebihan dalam aspek struktural maupun arsitektural. Disamping kelebihan tersebut, terdapat kelemahan yang mengakibatkan perilaku yang tidak ideal pada saat struktur menerima kombinasi beban gravitasi dan lateral. Kelemahan tersebut terdapat pada hubungan pelat-kolom, dimana tegangan lentur dan geser terakumulasi sebagai resultan dari beban gravitasi dan momen tak imbang yang disebabkan oleh beban lateral seperti halnya gempa. Untuk mengatasi masalah tersebut, terutama di daerah gempa potensial seperti halnya sebagian besar wilayah Indonesia, perlu dilakukan penelitian untuk meningkatkan perilaku hubungan pelat-kolom. Tulisan ini melaporkan hasil penelitian yang dilaksanakan dengan tiga benda uji berskala 1:2 dari model hubungan pelat-kolom interior yang dirancang dengan ukuran, material, dan detail yang sama, kecuali detail tulangan gesernya. Benda uji pertama, yang digunakan sebagai spesimen kontrol, menggunakan stud rail standar yang dirancang dengan mengacu standar ACI. Benda uji kedua dan ketiga menggunakan stud rail dengan modifikasi detail. Semua benda uji diujidengan beban gravitasi konstan yang dimodelkan dengan blok-blok beton dan simpangan lateral siklis yang mencakup respon elastis sampai inelastis. Hasil penelitian menunjukkan bahwa modifikasi stud rail secara signifikan meningkatkan perilaku hubungan pelat-kolom khususnya dalam hal kekakuan dan disipasi energi. Abstract. Flat slab structures are widely used for buildings because of its advantages both in structural and architectural aspects. Besides its advantages, there is a weakness leads to a poor structural behavior under combined gravity and lateral load. The weakness is concentrated in slab-column connections, where flexural and shear stresses are accumulated as a resultant of gravity load and unbalanced moment caused by lateral load such as earthquake. To solve the problem, especially in potential earthquake zone such as most of the Indonesia region, it is necessary to conduct researches to improve slab-column connections behavior. This paper reports the result of research conducted using three specimens of half scaled interior slab-column connection sub-assemblages designed using simillar dimensions, materials, and details, except the shear reinforcement details. The first specimen, constructed as a control specimen, used standard stud rails designed to comply with ACI codes. The second and third specimens used modified stud rail details. All specimens were subjected to a constant gravity load simulated by concrete blocks and cyclic lateral displacements ranging from elastic to inelastic responses. The experimental results show that modification of the stud rails significantly improves the specimen behavior especially the stiffness and energy dissipation.
Degradasi Kekuatan Beton Akibat Intrusi Mikroorganisme Ashad, Hanafi; Nasution, Amrinsyah; Imran, Iswandi; Soegiri, Saptahari
Jurnal Teknik Sipil Vol 13, No 3 (2006)
Publisher : Institut Teknologi Bandung

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Abstract

Abstrak. Makalah ini merupakan hasil studi eksperimental perilaku degradasi kekuatan beton di bawah kondisi intrusif mikroorganisme. Media intrusi yang digunakan berupa air kelapa dengan proses fermentasi alamiah. Produksi dominan mikroorganisme dengan media ini adalah dari golongan jamur dan ragi. Mikroorganisme dapat berkembang di dalam beton karena tersedianya nutrisi berupa kapur bebas dari hasil sampingan proses reaksi. Mikroorganisme dalam aktivitasnya memproduksi asam sulfur (H2SO4) yang jika bereaksi dengan kalsium hidoksida (CaOH), dapat berakibat degradasi/penurunan kekuatan beton. Hasil penelitian menunjukkan beton mutu rendah lebih sensitif terhadap degradasi kekuatan akibat intrusi mikroorganisme. Degradasi kekuatan beton dalam interval waktu dua tahun dapat mencapai kehilangan kekuatan sampai 60% untuk fc’ = 25 MPa, 50% untuk fc’ = 40 MPa, dan sampai 33% untuk fc’ = 60 MPa. Abstract. This paper presents the experimental study on concrete strength degradation under intrusive of microorganism. The intrusion media of coconut water with natural fermentation process produces microorganism with dominant elements are aspergillus niger and sacchromycode ludwigi. The microorganism may be well spread in concrete due to nutrition such as free lime from reaction process. The microorganism in its present in concrete produces sulfuric acid (H2SO4) and its reaction with calsium hydroxide (CaOH) causes strength reduction in concrete. Experimental result shows that for concrete of minimum strength, its strength degradation is more sensitive due to intrusion microorganism. The degradation in strength concrete may be of range 60% for concrete strength fc’ = 25 MPa, 50% for fc’ = 40 MPa, and 33% for fc’ = 60 MPa.
Studi Eksperimental Penggunaan Tulangan Pengekang Tidak Standar yang Dimodifikasi pada Kolom Persegi Beton Bertulang Kristianto, Anang; Imran, Iswandi; Suarjana, Made
Jurnal Teknik Sipil Vol 18, No 3 (2011)
Publisher : Institut Teknologi Bandung

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Abstract

Abstrak. Salah satu persyaratan penting untuk konstruksi tahan gempa yang terkait dengan pengekangan adalah pemasangan tulangan pengekang dengan kait gempa 1350 pada sengkang. Dalam pelaksanaannya banyak pelaksana konstruksi menggunakan tulangan pengekang dengan kait 900 atau dengan konfigurasi dobel C (tidak sesuai standar). Berdasarkan beberapa hasil penelitian dan beberapa catatan dari kejadian gempa di Indonesia akhir-akhir ini, pemasangan tulangan pengekang yang tidak sesuai standar untuk kolom beton bertulang menghasilkan kinerja yang buruk sebagai struktur tahan gempa. Makalah ini memaparkan hasil eksperimen yang bertujuan mengembangkan elemen tambahan (pen-binder) untuk meningkatkan efektivitas pengekangan kolom beton dengan tulangan pengekang yang tidak sesuai standar. Efektivitas dari tambahan elemen untuk meningkatkan kinerja pengekangan pada beberapa konfigurasi tulangan pengekang yang tidak standar ini diuji dengan beban aksial dan lateral siklis. Benda uji berjumlah 5 buah kolom, dimensi penampang 260 mm x 260 mm dan tinggi 1500 mm. Variabel pengujian adalah jenis material pen-binder,level beban aksial dan sudut kait yang digunakan dalam tulangan pengekang. Hasil pengujian menunjukkan bahwa modifikasi terhadap tulangan pengekang tidak standar efektif mengekang inti beton, meningkatkan daktilitas dan kemampuan disipasi energikolom benda uji.Abstract. One of the important requirements for earthquake resistant buildings associated with confinement is the use of seismic hook (135-degree hook) in hoop. Therefore, in practice many construction workers use confining reinforcement 90-degree hook or with double C configuration (code non-compliance). Based on some research and some records of recent earthquakes in Indonesia, the use of the code non-compliance confining reinforcement for reinforced concrete columns can result in structures with poor seismic performance. This paper presents the results of experimental study with an objective to develop an additional element (pen-binder) expected to improve the effectiveness of concrete columns confined with non-compliance confining reinforcement. The effectiveness of  this additional element in improving the performance of some configuration of non-compliance confining reinforcement in columns under axial and lateral cyclic loading was investigated in this study.The specimens tested in the study were 5 column specimens, with 260 mm x 260 mm in cross section and 1500 mm in height. The test variables were types of pen-binder material, level of axial load, angle of hook applied. The test results indicate that confining reinforcement modification can be effective in confining the core concrete, improving ductility and dissipation energy of column specimens.
Pengaruh Pemodelan Zona Terkekang Terhadap Prediksi Hubungan Momen-Kurvatur Kolom Persegi Beton Mutu Tinggi Imran, Iswandi; Cornelis, Remigildus
Jurnal Teknik Sipil Vol 12, No 2 (2005)
Publisher : Institut Teknologi Bandung

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Abstract

Abstrak. Paper ini mengkaji salah satu aspek yang berkaitan dengan pemodelan daerah terkekang pada kolom persegi beton mutu tinggi yang diberi beban aksial tekan eksentrik. Cakupan daerah terkekang pada penampang kolom adalah parameter yang dikaji untuk melihat pengaruhnya terhadap prediksi analitis kekuatan dan daktilitas kolom. Beberapa pemodelan daerah terkekang yang sering digunakan dalam berbagai literature dievaluasi untuk mengetahui karakteristik dan sensitivitasnya. Selanjutnya dalam paper ini dikembangkan program komputer MOKUR2D untuk menganalisis hubungan momen-kurvatur kolom persegi beton mutu tinggi. Dalam program, cakupan daerah terkekang pada penampang kolom dapat dimodelkan dengan tiga pendekatan, yaitu pendekatan model konvensional yang menggunakan koefisien kekangan efektif, model dengan daerah arching action yang tak terkekang dan model penampang dengan tiga variasi derajat kekangan yang berbeda. Studi perbandingan dengan menggunakan program tersebut kemudian dilakukan terhadap 4 buah kolom yang diuji oleh Sheikh dan Bayrak [1998]. Semua kolom tersebut berdimensi 305 x 305 mm, dengan delapan tulangan longitudinal berdiameter 19.5 mm yang terdistribusi merata pada penampang. Tegangan leleh tulangan baja yang digunakan adalah 454 MPa. Dua tipe konfigurasi sengkang yang dikaji masing-masing adalah sengkang diamond dan konvensional dengan volumetric ratio berkisar antara 1.68 hingga 5.24 persen. Spasi tulangan sengkang yang terpasang berkisar antara 90 mm hingga 108 mm. Hasil analisis menunjukkan bahwa pemodelan daerah terkekang dengan model konvensional masih cukup akurat walaupun sedikit overestimate terhadap hasil eksperimen sedangkan model dengan tiga variasi derajat kekangan terlihat memiliki akurasi respon teoritis momen kurvatur yang lebih baik dan sangat mendekati hasil eksperimen jika kekangan pada daerah arching action ditetapkan sebesar 50% dari kekangan pada inti kolom.Abstract. This paper studies one aspect of confinement modeling of high strength concrete square columns subjected to axially eccentric compression. Confined zone models were studied to evaluate their effect on the analytical prediction of strength and ductility of high strength concrete square columns. Several models of confined zones found in literatures were discussed to observe their characteristics and sensitivity. Based on the findings, a computer program MOKUR2D was developed. In the program, confined zone in reinforced concrete columns can be modeled with three different approaches, i.e. conventional models (using a coefficient of effective confinement), models with unconfined arching zone, or models with three zones of confinement. A comparative study using the program was later carried out on 4 high-strength concrete square columns tested by Sheikh and Bayrak [1998]. The cross-section size of all columns was 305 x 305 mm. All columns were reinforced with 8 bars of 19.5 mm diameter, uniformly distributed around the core perimeter. Yield strength of the rebars was 454 MPa. Two types of ties configuration ties were used with volumetric ratio varying from 1.68 percent to 5.12 percent. The spacing of the ties was from 90 mm to 108 mm. From the study, it was found that the conventional model is able to produce a fairly good estimate of test results. The best estimate of test results is given by the model with three zones of confinement in which the arching zoneis assigned with 50% of full confinement.
Pemodelan Retak pada Struktur Beton Bertulang Nuroji, Nuroji; Besari, Mohamad Sahari; Imran, Iswandi
Jurnal Teknik Sipil Vol 17, No 2 (2010)
Publisher : Institut Teknologi Bandung

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Abstract

Abstrak. Paper ini menyajikan pemodelan retak pada struktur beton bertulang dengan menggunakan nonlinear finite element. Pemodelan retak yang digunakan dalam studi ini adalah discrete crack untuk mensimulasikan diskontinuitas regangan. Discrete crack dimasukkan ke dalam struktur ketika tegangan utama tarik pada titik nodal telah mencapai kuat tarik beton. Penerapan discrete crack ini hanya dilakukan jika hasil kombinasi tegangan didominasi oleh tegangan normal tarik. Meskipun demikian, jika tegangan utama tarik pada Gauss point telah melampaui tegangan tarik beton, retak diperlakukan sebagai retak tersebar dengan merubah perilaku material dari isotropik menjadi orthotropik. Untuk menggambarkan arah dan pola retak retak yang benar, pemasukan discrete crack ke dalam struktur tidak hanya dilakukan dengan melakukan pemisahan titik nodal yang tegangannya telah mencapai kuat tarik beton, tapi juga merotasi retak ke arah tegak lurus terhadap arah tegangan utama tarik dan menggeser titik nodal di ujung retak sejauh perambatan retaknya. Beberapa benda uji dengan kasus yang berbeda yaitu Beam J4 (Burns and Siess 1962), Beam OA (Bresler dan Scordelis 1963) dan Beam A4 (Ahmad et al. 1986). dianalisis untuk memvalidasi model. Model ini bukan hanya mampu menunjukkan bahwa respon struktur dari model sangat mendekati hasil pengujian eksperimental, tapi juga dapat menggambarkan pola retak yang benar.Abstract. This paper presents a crack model for reinforced concrete structures by using nonlinear finite element method. The crack model used in this study is a discrete crack to simulate strain discontinuity, Discrete cracks are inserted into the structure when the principal tensile stress of nodes have reached the tensile strength of concrete. Insertion of discrete cracks into the structure is only performed when resulting stress combinations are dominated by normal tension stress. Nevertheless, if the principle tension stress on a Gauss point has exceeded the tensile strength of concrete, the craks is treated as a smeared crack with a change in material behavior from one isotropic to another orthotropic character. To find the appropriate direction and pattern of cracks, insertion of discrete cracks into the structure is not only performed by node separation at nodes which have reached the tensile strength of concrete, but also by rotation of the crack perpendicular to the direction of the principle tension stress and dragging the crack-tip node as far as the crack has propagated. Some specimens with different cases e.i Beam J4 (Burns and Siess 1962), Beam OA (Bresler dan Scordelis 1963) and Beam A4 (Ahmad et al. 1986) were analyzed to validate the model. The model is not only able to shows that the structure response is very close to the experimental test, but also can describe the proper crack pattern.
Kontribusi Bubuk Slag Nikel di dalam Meminimalkan Dampak Intrusi Mikroorganisme terhadap Perilaku Fisik Material Beton Ashad, Hanafi; Nasution, Amrinsyah; Imran, Iswandi; Soegiri, Saptahari
Jurnal Teknik Sipil Vol 15, No 1 (2008)
Publisher : Institut Teknologi Bandung

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Abstract

Abstrak. Makalah ini adalah hasil studi eksperimental mengenai  penggunaan limbah nikel di dalam meminimalkan dampak intrusi  mikroorganisme terhadap perilaku fisik pada material beton. Mikroorganisme yang diintrusikan ke dalam pori-pori beton adalah golongan jamur (Aspergillus niger) dan ragi (Sacchromycodes ludwigi). Kedua golongan mikroorganisme ini memproduksi zat organik yaitu asam asetat (CH3COOH) yang dapat bereaksi dengan senyawa kimia di dalam material beton, terutama senyawa kalsium hidroksida dan kalsium silikathidrat. Reaksi tersebut berdampak pada meningkatnya porositas, koefisien permeabilitas, dan hilangnya sebagian massa beton. Dampak intrusi mikroorganisme tersebut dapat diminimalkan dengan menggunakan 16% bubuk slag nikel. Untuk beton tanpa bubuk slag nikel, perilaku fisiknya cenderung mengikuti persamaan fungsi geometri, sedangkan pada beton 16% bubuk slag nikel cenderung mengikuti persamaan fungsi laju pertumbuhan jenuh.Abstract. This paper is presents the experimental study on use of nickel slag powder in the minimization intrusion impact of microorganism to physical properties of concrete materials. The intrusion of microorganism into concrete pores is fungus (Aspegillus Niger) and yeast (Sacchromycodes ludwigi) groups. Both types of this microorganism produce organic matter is acetate acid (CH3COOH) able to react with chemical compound in concrete materials, especially calcium hydroxide and calcium silicate hydrate compound. The reaction affect on the increasing of porosity, permeability coefficient, and loss masses of concrete. The effect of intrusion of microorganism can be minimized by use 16% nickel slag powder. For concrete without nickel slag powder, physical properties tend to follow equation of geometry function (power equation equation), while the concrete of 16% nickel slag powder as indicated by equation of saturated growth rate function.
Co-Authors -, Asrurifak Adhijoso Tjondro Adhijoso Tjondro Agus Himawan Alatas, Idrus Muhamad Amrinsyah Nasution Amrinsyah Nasution Amrinsyah Nasution Amrinsyah Nasution Anang Kristianto Ananta Sofwan Ananta Sofwan Ananta Sofwan Anggadinata, Yusmar Antonius Antonius Antonius Antonius Arif Hidayat Aris Aryanto Asrurifak - Asrurifak, Muhammad Bambang Budiono Bambang Budiono Bambang Budiono Bambang Budiono Bambang Budiono Bambang Budiono Bambang Budiono Bambang Budiono Bambang Sunendar Bambang Sunendar Bambang Suryoatmono Bigman M Hutapea Bigman M. Hutapea Budiono, Bambang Budiono, Bambang Burhanuddin Burhanuddin Daony Roha Silitonga Delfebriyadi Delfebriyadi, Delfebriyadi Dionysius M. Siringoringo Ediansjah Zulkifli Editia, Rakhma Nur Elvira Elvira Erwin Lim Hanafi Ashad Hanafiah, Hanafiah Hartasurya, Pasca Herlien D Setio Herwani . Hudaya, Chairul Hutapea, Bigman M Hutapea, Bigman M. Ivindra Pane Ivindra Pane Ivindra Pane Ivindra Pane James Michael Johnny Setiawan Kamaruddin, Samira Albati Binti Kartawiria, Andi Kurnia Setiadi Kurniawan, Yusrizal Lim, Erwin Made Suarjana Maharani, Yusuf Manurung, Ardita Elias Masyhur Irsyam Mikhail, Reguel Mohamad Sahari Besari Mohamad Sahari Besari, Mohamad Sahari Muhammad Asrurifak Muslinang Moestopo Nazir, Ramli Bin Nuroji Nuroji Partogi H. Simatupang, Partogi H. Pranata, Yosafat Aji Purwoko, Agus Raden Mariana Sari Badriah Remigildus Cornelis Ria Ananda Riawan Gunadi Ronald Simatupang Sabara, Akhmad Ilham Ramadhan Saptahari Soegiri Saptahari Soegiri Saptahari Soegiri Saptahari Soegiri, Saptahari Saptahari Sugiri Saptahari Sugiri Setiawan, Muhammad Hariyadi Shinsuke Yamazaki Siswantono, Siswantono Siti Aisyah Nurjannah, Siti Aisyah Sugiri, Saptahari Sugiri, Saptahari Sunara Purwadaria Supriadi Supriadi Veby Citra Simanjuntak Wanda Lestari Wibawa, Sholeh Hendra Wibowo, Prasetyo Arief Wihardja, Thavera Yosafat Aji Pranata Yulita Arni Priastiwi