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All Journal Jurnal Teknik ITS IPTEK The Journal for Technology and Science Journal of Civil Engineering Jurnal Aplikasi Teknik Sipil COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat
Bambang Piscesa
Civil Engineering Department, Faculty Of Civil, Environmental And Geo Engineering, Institut Teknologi Sepuluh Nopember (ITS), Surabaya, Indonesia
Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Engineering Industrial & Manufacturing Engineering Social Sciences

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DUCTILITY EVALUATION OF REINFORCED CONCRETE COLUMN MADE OF NORMAL- TO HIGH-STRENGTH CONCRETE UNDER CONSTANT AXIAL LOAD LEVEL COMBINED WITH FLEXURAL LOADING USING NONLINEAR SECTIONAL FIBER BASED MODEL Bambang Piscesa; Dwi Prasetya; Mudji Irmawan; Harun Alrasyid
Journal of Civil Engineering Vol 34, No 1 (2019)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (388.291 KB) | DOI: 10.12962/j20861206.v34i1.5451

Abstract

This study presents the ductility evaluation of reinforced concrete column made of normal-strength material using various empirical stress-strain model with nonlinear sectional fiber based analysis. The purpose is to evaluate the confinement requirement for reinforced concrete column under high axial load level. The concrete strength considered in the analysis are varies from 30 to 70 MPa while the steel reinforcing bar yield strength considered is only 400 MPa. The ductility is evaluated by using the customized ductility index measurement. The ratio of the concrete cover to the concrete core is set to 0.1 but not more than 40 mm. Attard and Setunge’s concrete constitutive model is used in this investigation. Cover spalling behavior is considered in the analysis by including the restrained shrinkage effect on the concrete strength and the softening behavior. From this study, it was found that extra confinement is necessary to maintain the expected minimum level of ductility.
Strut and tie model optimization for reinforced concrete deep beam using genetic algorithm Bambang Piscesa, PhD; Tavio Tavio
Journal of Civil Engineering Vol 35, No 1 (2020)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v35i1.7754

Abstract

This paper presents strut and tie model structural optimization of reinforced concrete deep beam using genetic algorithm. Genetic algorithm is used as the optimization platform as it does not require differentiation of the exact mathematical formulation to get the optimum solution. The force analysis is carried out using two-dimensional linear finite element method with truss element. The struts and ties design are based on ACI 318. One RC deep beam example is presented as an example. During optimization, there are two constraints which consisted of strength of the member alone and combination with deformation limit of the nodes. The stress ratio for both struts and ties are set to not exceed unity while the deformation was limited to 2.0 mm. From the optimization analysis, it can be concluded that genetic algorithm can be used to get the most optimum structural configuration which yield the most economical solution for design purposes. On the other hand, it is found out that optimizing only the strength alone can yield a more economical solution compared to the design references. However, if deformation constraint is added in the optimization parameters, larger deep beam depth is required to satisfy the deformation limits.
Strut and tie model optimization for reinforced concrete bridge pier head structure using a genetic algorithm Bambang Piscesa; Tavio Tavio
Journal of Civil Engineering Vol 35, No 2 (2020)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v35i2.8573

Abstract

Strut and tie model (STM) is more suitable to design the pierhead structures which resist high shear forces transferred from the girders. These pierhead structures behave like the disturbed regions as in reinforced concrete deep beam. The design of the struts and ties elements requires the initial geometry configuration of the truss model where its boundaries are limited by the shape of the pier head structures. To find the optimum topological shape of the truss model, the genetic algorithm (GA) optimization technique is used in this paper. The objective functions in the GA optimization consisted of minimizing the usage of concrete and steel reinforcement material and ensuring all the stress ratio of the strut and tie elements are less than equal to unity. Both prestressed and non-prestressed pierheads are investigated in this paper. The use of prestressing in the pierhead structures reduces the stresses in the main tension tie significantly and allowing some members of the shear tie and compression struts to have almost zero stresses. For these elements with zero stresses, the elements can be removed and reduces the concrete and rebar materials usage. Furthermore, the genetic algorithm optimization is found to be successful to ensure all the stress ratio in the members to be less than equal to unity.
SHEAR BUCKLING ANALYSIS OF CORRUGATED WEB I-GIRDER WITH 3D NONLINEAR FINITE ELEMENT METHOD Ni Putu Ary Yuliadewi; Heppy Kristijanto; Bambang Piscesa; Priyo Suprobo; Faimun Faimun
Journal of Civil Engineering Vol 36, No 2 (2021)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v36i2.9611

Abstract

This paper presents a shear buckling analysis of corrugated web I-girder beam using nonlinear finite element analysis. An in-house finite element package called 3D-NLFEA is used in the simulation. The steel material is modelled as solid elements with one-eight aspect ratio between the element size and its thickness. The double sine waves equation is used to generate the initial imperfection in the corrugated web. The nonlinear geometry deformation, which is essential in capturing the buckling behavior, is considered using the 2nd order analysis in 3D-NLFEA. A comparison with the carried out experimental test in the laboratory showed that the peak prediction from the analytical model was in good agreement. Furthermore, using the double sine waves equation as the initial imperfection can closely predict the buckling mode and shapes of the corrugated web I-girder as obtained from the experimental test.
FINITE ELEMENT MODELING OF CIRCULAR REINFORCED CONCRETE COLUMN CONFINED WITH CFRP UNDER ECCENTRIC LOADING Angga Bayu Christianto; Bambang Piscesa; Faimun Faimun; Pujo Aji
Journal of Civil Engineering Vol 34, No 2 (2019)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v34i2.6375

Abstract

This paper presents nonlinear finite element analysis of eccentrically loaded circular Reinforced Concrete (RC) column confined with Carbon Fiber Reinforced Polymer (CFRP) wraps. The concrete constitutive model uses a plasticity-fracture model which is restraint sensitive, utilize a non-constant plastic dilation rate, and is able to simulate the plastic volumetric compaction of concrete core under high confining pressure. For validation of the models, two available specimens from the literature are used in the validations. Excellent agreement between the numerical models and the available test results are obtained in this study. A detailed investigation on the confinement effectiveness of both external and internal confining devices are presented and discussed. This discussion of the confinement effectiveness is important to be included in the design formula.
Experimental and Numerical Bending Analysis of Steel/Resin-Talk Sandwich Material Pratama Arianto; Achmad Zubaydi; Bambang Piscesa; Tuswan Tuswan
IPTEK The Journal for Technology and Science Vol 30, No 3 (2019)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (979.686 KB) | DOI: 10.12962/j20882033.v30i3.5496

Abstract

Sandwich material can be used as the substitute for the ship conventional material. The core sandwich material used in this study consisted of a talk-resin-catalyst. The core mixture proportion is 90% resin and 10% talk. A thick steel plates is used as the face of the core sandwich material. Both experimental and numerical simulations are carried out to investigate the bending or flexural behavior of the proposed sandwich material. Three-point bending test has been carried out to determine the yield stress and maximum stress as well as the damage mechanism of the specimen up-to failure. From the investigation, the first failure process occurred at the mid-span as flexural cracks. As the load continue, these flexural cracks progressed until fully fracture of the core material take places. From the experimental investigation, it was found that the yield stress and maximum stress of the sandwich panel are 22.88 MPa and 28.63 MPa. On the other hand, numerical simulation is carried out using ABAQUS which has shown to be sufficient to predict the response of the sandwich-panel. However, a more sophisticated constitutive model is required to successfully model the experimental behavior in close agreement.
Studi Analisis Perilaku Sambungan Kaku (Rigid Connection) Balok - Kolom Baja Tipe Extended End Plate dengan Metode Elemen Hingga Oktavia Ully Artha Silalahi; Budi Suswanto; Bambang Piscesa
Jurnal Aplikasi Teknik Sipil Vol 18, No 1 (2020)
Publisher : Departemen Teknik Infrastruktur Sipil Institut Teknologi Sepuluh Nopember Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1732.679 KB) | DOI: 10.12962/j2579-891X.v18i1.5346

Abstract

Sambungan adalah elemen yang sangat penting dalam desain dan konstruksi bangunan tahan gempa. Kegagalan atau keruntuhan bangunan pasca gempa ditentukan oleh kualitas sambungan. Pemilihan sambungan yang tepat sangat diperlukan untuk menjamin terjadinya sendi plastis pada daerah balok.Studi ini membahas tentang perilaku dari sambungan baja tipe Extended End Plate saat diberi beban siklik dengan menggunakan software berbasis metode elemen hingga ABAQUS 6.14. Pemodelan ini meliputi variasi nilai pratarik baut, penambahan pengaku dan tanpa pengaku pada badan kolom. Dengan adanya studi ini, diharapkan pula pemodelan sambungan balok - kolom baja tipe Extended End Plate yang memenuhi syarat baik kuat maupun daktail pada bangunan untuk daerah gempa kuat dapat diperoleh dengan baik.Gang Shi et al (2006), melakukan tes eksperimental untuk sambungan dari rangka baja end-plate dengan beberapa variasi dari sambungan baja. Studi ini akan melakukan pemodelan yang kemudian hasilnya akan dibandingkan dari moment – rotasi, nilai kekakuan rotasi dan mode kegagalan. Spesimen yang dianalisis dari eksperimental ada dua spesimen yaitu spesimen JD2 dan spesimen JD4.            Pemodelan yang digunakan welded plate I-Shaped untuk dimensi kolom 300 × 250 × 8 × 12 mm dan dimensi balok 300 × 200 × 8 × 12 mm, ketebalan pengaku kolom 12 mm, ketebalan pengaku extended end plate 10 mm. Hasil dari studi spesimen JD2 yaitu nilai Mu sebesar 335.86 KNm sedangkan nilai u sebesar 0.042 rad. Spesimen JD4 yaitu nilai Mu sebesar 287.58 KNm sedangkan nilai u sebesar 0.037 rad. Nilai kekakuan rotasi spesimen JD2 sebesar 68733 KNm/rad dan JD4 sebesar 36175 KNm/rad. Adapun dari segi mode kegagalan kedua spesimen menunjukkan kegagalan yang sama. Untuk nilai energi disipasi spesimen JD2 sebesar 70712.75 KNmm dan JD4 sebesar 51662.30 KNmm. Serta ditinjau pula dari nilai faktor daktilitas dimana nilai spesimen JD2 sebesar 2.99 dan nilai JD4 sebesar 2.84 yang nilai di atas masuk kategori daktilitas parsial dengan memenuhi syarat 1.5< <5. Hasil pemodelan di atas jika dibandingkan dengan hasil dari eksperimen yang digunakan tidak memiliki selisih yang signifikan. Hasil pemodelan dengan program bantu finite element merupakan sebuah pendekatan sehingga hasilnya tidak sama persis dengan hasil eksperimen yang dilakukan. Persyaratan model sambungan balok - kolom diharapkan dapat digunakan pada struktur yang tahan gempa. Berdasarkan hasil pemodelan yang dilakukan, pemodelan pada sambungan memiliki kemampuan daktilitas yang baik.
Analisa Tidak Linier Mekanisme Keruntuhan Jembatan Busur Rangka Baja (A-Half Through Arch) Abdul Rochim; Data Iranata; Bambang Piscesa; Navir Afif Refani
Jurnal Aplikasi Teknik Sipil Vol 17, No 1 (2019)
Publisher : Departemen Teknik Infrastruktur Sipil Institut Teknologi Sepuluh Nopember Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (387.664 KB) | DOI: 10.12962/j2579-891X.v17i1.4764

Abstract

The collapses of steel truss bridges can be caused by some factors such as vehicle overloads, material deterioration (corrosion, fatigue), and unexpected tsunami and/or earthquake loads. However, in this paper, the study is limited only to the failure of a-half through arch bridge due to earthquake loads. The bridge has a 100 m long span and is designed using the response spectrum of Surabaya city, East Java, Indonesia. Static nonlinear push-over analysis is used to investigate the performance and the collapse mechanism of the bridge. The bridge was designed based on SNI 1725-2016 and SNI 2833-2016. From the analysis, the failure of the structural elements occurred in the arch members located somewhere near the end portal. The performance level of the bridge determined using the Capacity Spectrum Method [1] is at the Immediate Occupancy (IO) level."--------------------------------------------------------------------------------"Keruntuhan jembatan bisa disebabkan beberapa faktor seperti beban berlebih, fatik, korosi, gempa bumi dan/atau tsunami. Namun, dalam artikel ini, penelitian dibatasi hanya pada kegagalan jembatan busur dengan tipe a-half through arch bridge yang diakibatkan oleh beban gempa. Jembatan yang ditinjau memiliki bentang 100 m dan didesain sesuai dengan zona gempa kota Surabaya, Jawa Timur – Indonesia. Jembatan didesain dengan menggunakan SNI 1725-2016 dan SNI 2833-2016. Analisa beban dorong tidak linear digunakan untuk mengetahui kinerja dan mekanisme keruntuhan struktur jembatan. Berdasarkan hasil studi menunjukkan bahwa kegagalan elemen struktur jembatan terjadi pada elemen busur dekat portal akhir. Level kinerja struktur jembatan ditentukan dengan Metode Kapasitas Spektrum [1] dan termasuk dalam level Immediate Occupancy (IO).
NUMERICAL INVESTIGATION OF GEOPOLYMER REINFORCED CONCRETE BEAMS UNDER FLEXURAL LOADING USING 3DNLFEA Yosi Noviari Wibowo; Bambang Piscesa; Yuyun Tajunnisa
Journal of Civil Engineering Vol 37, No 1 (2022)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v37i1.12095

Abstract

The development of geopolymer concrete is one of the most significant breakthroughs to replace the OPC concrete causing global warming issues. Investigations on the structural behavior of geopolymer concrete are limited and still need adjustments in numerical simulations to experimental results in previous studies. This study investigated the flexural behavior of geopolymer concrete as a structural member using the numerical method. The utilization of the finite element method is an alternative to widely determining the structural behavior of geopolymer concrete as a construction material. In this study, the author refers to the research conducted by Pham et al. The research developed a four-point bending test with variations in tensile steel reinforcement ratio. The results of the experimental tests that Pham has carried out will be verified by numerical simulation in three dimensions. The validation of experimental specimens with numerical specimens is done to compare the moment-curvature and the crack pattern of concrete. Numerical investigation accurately captures the structural behavior of moment-curvature and crack pattern of geopolymer concrete. The moment maximum deviation between experimental and numerical results is 1.3 to 2.4%. However, there are differences in the number and length of cracks in the bending moment area. The difference of crack pattern in the bending moment area between experimental results and numerical results due to the modeling did not consider the input of fracture energy. The experiment from referenced studies did not include fracture energy data, so the 3DNLFEA modeling used the fracture energy value of OPC concrete.
MODELING PULL-OUT BEHAVIOR OF THE DEFORMED REBAR EMBEDDED INSIDE THE REINFORCED CONCRETE Kohar Yudoprasetyo; Bambang Piscesa; Harun Alrasyid
Journal of Civil Engineering Vol 37, No 1 (2022)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v37i1.11871

Abstract

Abstract: This study presents the modeling of the pull-out behavior of deformed bars embedded inside the reinforced concrete element. The simulation uses an in-house finite element package called 3D-NLFEA. Sufficiently small solid elements that consider the frictional resistance and mechanical interlocking between the bar thread and the concrete matrix were used in the simulation. The effect of concrete compressive strength, cover thickness, and stirrup configuration on the pull-out capacity of the modeled specimens are investigated thoroughly. The modeling found out that the 3D-NLFEA package can capture the bond-fracture process at the interface between the bars and concrete. The fracture that occurs in the concrete was dominated by tensile splitting failure. The presence of stirrups that confined the concrete and restrained the crack propagation significantly influences the pull-out capacity, cracking pattern, and failure behavior at the bar interface with the concrete. The analysis results from 3D-NLFEA are also compared with the 3D-RBSM analysis results available in the literature. From the comparison between the two packages, it can be concluded that the analysis result from 3D-NLFEA is somewhat more conservative compared to the 3D-RBSM.
Co-Authors . Faimun Abdul Rochim Achfas Zacoeb Achmad Zubaydi Adena, Haura Adhi Dharma Prasetyo Ainun Najib Aji, Pujo Alrasyid, Harun Alrasyid, Harun Angga Bayu Christianto Asdam Tambusay Ayu Dewadatta, Ni Wayan Amrita Dwi Prasetya Dyah Sukma Putri Andini Endah Wahyuni Ferry Alius Harun Al Rasyid Harun Al Rasyid Heppy Kristijanto Hidajat Sugihardjo Ika Salsabila Nurahida Imron Imron Iranata, Data Irmawan, Mudji Kohar Yudoprasetyo Lada, Adveni Hesty Altisari Lestari, Laras Laila Lina Febrianty Mudji Irmawan Muhammad Aziz Mubarok Muhammad Rifky Trisnawardhana Muhammad Satrya Ageta Ni Putu Ary Yuliadewi Prasetya, Dwi Pratama Yuli Arianto Priyo Suprobo Pujo Aji Refani, Afif Navir Silalahi, Oktavia Ully Artha Suswanto, Budi Sutrisno, Wahyuniarsih Sutrisno, Wahyuniarsih Tavio, Tavio Tugas Hutomo Putra Tuswan Tuswan Wahyuniarsih Sutrisno Wisnu Priambodo Yosi Noviari Wibowo Yuyun Tajunnisa