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APPLICATION OF DIGITAL IMAGE CORRELATION TO CAPTURE THE CRACK MOUTH OPENING DISPLACEMENT OF THE NOTCHED STEEL FIBER REINFORCED CONCRETE (SFRC) BEAM Mudji Irmawan; Bambang Piscesa; Priyo Suprobo; Harun Al Rasyid
Journal of Civil Engineering Vol 37, No 2 (2022)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v37i2.14046

The application of digital image correlation (DIC) to capture any point in the experimental test is found to be promising. Using the DIC and appropriate tool can overcome the limitation of the traditional sensors to capture the movement or displacement in the tested specimen. In this study, an open-source DIC called Digital Image Correlation Engine (DICE) is used to capture the crack mouth opening displacement (CMOD) of the notched steel fiber reinforced concrete (SFRC) beam with points tracking method. There are three beam specimens with different sizes and similar aspect ratios reported in this paper. All beams have 0.5% steel fiber volumetric content. The SFRC beams are marked with points and tested under a three-point bending flexural test. Custom firmware for Canon DSLR 650D digital camera called Magic Lantern is used to capture the pictures per one second. DICE software is used to analyze the point movements and dumped the output file. ParaView 5.9.0 is then used to visualize the data. A method to calibrate the point coordinate with actual measurement is proposed. A small script is written in Visual Basic Application (VBA) in Microsoft Excel to correlate the displacement for each point of interest with the recorded applied load. With the developed script, any point of interest tracked with DICE can be related to the recorded data from the data logger. From this study, the obtained CMOD with the corresponding applied load is presented, which can be used to investigate the flexural fracture energy of the SFRC beam.

FINITE ELEMENT ANALYSIS ON THE NONLINEAR BEHAVIOR OF THE RC SHEAR WALL WITH REGULAR OPENINGS INFLUENCED BY HIGH-STRENGTH STEEL Ika Salsabila Nurahida; Bambang Piscesa; Pujo Aji; Asdam Tambusay
Journal of Civil Engineering Vol 37, No 2 (2022)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v37i2.13447

This paper presented a nonlinear finite element analysis of lateral loading RC shear walls with regular openings using the 3D-NLFEA program. The RC shear walls model was generated from the available test results in the literature. To model the concrete under a complex stress state, a multi-surface plasticity model which combines compression failure surface with tension cut-off failure surface was used. The model was intended to look at the load-displacement relationship and the crack pattern between the model and the numerical model. In addition to the numerical model verification, parametric studies were carried out to investigate the use of high-strength steel (HSS) of the two different grades (grades 100 and 120) to replace all the normal-strength steel (NSS) or only some of it. The parametric studies found that the shear wall with the NSS bar demonstrated higher stiffness and achieved higher lateral load with the lowest extent of damage (compared to the RC shear wall with the HSS bar). On the other hand, using the HSS bar resulted in lower stiffness, lower lateral load, and higher damage region, which was expected as more strain is required to yield the HSS bar.

Non Linear Analysis of Reinforced Concrete Column Strengthened by Reinforced Concrete Jacketing with High Strength Steel Imron Imron; Bambang Piscesa; Achfas Zacoeb
Journal of Civil Engineering Vol 37, No 2 (2022)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v37i2.13641

The strengthening column structure elements with reinforced concrete jacketing were chosen in this study because it is the most common and easy to apply practically to existing column structures. Modeling data using test specimens from Ersoy et. al by adhering to constitutive models of concrete materials from Attard and Stunge and Bilinear steel. The purpose is to perform non-linear analysis modeling through the behavior of the section of the RC column reinforced with RC jacket by taking into account the influence of interface slip and initial strain by using a two-dimensional sectional analysis approach with a fiber-based method made using MATLAB. Non-linear analysis was performed to obtain the moment-curvature relationship and validate the modeling results with the experimental model then make modeling variations based on the variations high strength steel reinforcement and evaluate the results in curvature ductility and index ductility. The prediction results showed a fairly good fit with the experimental results and modeling variations showed that the greater value of interface slip coefficient, the higher the curvature ductility and index ductility, the variation modeling using high-strength steel in longitudinal reinforcement can increase flexural, axial and lateral capacity, but it is lower in ductility, while using normal strength steel for longitudinal reinforcement and high strength steel for lateral reinforcement with tighter spacing provides higher ductility.

NUMERICAL SIMULATION OF REINFORCED CONCRETE SHEAR WALL USING 3D-NLFEA Ainun Najib; Bambang Piscesa; Harun Alrasyid
Journal of Civil Engineering Vol 37, No 2 (2022)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v37i2.10052

Reinforced concrete shear walls are the main lateral load-resisting system in reinforced concrete structures. Shear walls have high stiffness when lateral load occur, especially due to earthquake loads. In the recent earthquake, the shear wall was damaged at the boundary eelment. The damage in boundary element is triggered by out of plane instability, concrete crushing, and reinforcement buckling. This study will evaluate the performance reinforcment concrete shear wall using the three-dimensional finite element method. Furthermore, the results obtained in this study will be validated firstly against the results of existing research. Based on the results of the study, the FEM validation process provides predictions that are in accordance with the experimental results regarding the hysteresis curve and the form of damage to the shear wall with an error value of 2.07% < 5%. However, the strain of shear wall elong the height of the wall has eror 26%.

NON-LINEAR SECTIONAL ANALYSIS OF CONCRETE ENCASED STEEL STUB COLUMN SUBJECTED TO AXIAL LOAD Tugas Hutomo Putra; Bambang Piscesa; Hidajat Sugihardjo
Journal of Civil Engineering Vol 38, No 1 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v38i1.16055

This paper presents a numerical parametric study of Concrete Encased Steel Column (CESC) due to centrically and eccentrically axial load. To model the confining pressure of rebar and steel profile, modified Mander’s equations was used. The non-linear sectional analysis was performed using an in-house NL-Column program using the fiber-based method. The CESC section was discretized using Netgen 2D meshing algorithm. The developed CESC model was validated using the available test results in the literature. After model was validated, parametric studies were carried out to investigate the behaviors of CESC with different concrete compression strength, confinement bar diameter, and confining space. The parametric studies found that the column with higher concrete compression strength tend to have higher axial and flexural capacity but reduce the overall ductility. Increasing the confinement bar diameter slightly increases the axial and flexural capacity and ductility on the other hand, utilizing tighter confinement space resulted in higher ductility but with small increase in axial and flexural capacity.

Experimental Evaluation of Heat of Hydration in Concrete Incorporating Supplementary Cementitious Materials Lada, Adveni Hesty Altisari; Sutrisno, Wahyuniarsih; Piscesa, Bambang
Journal of Civil Engineering Vol 39, No 2 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v39i2.21651

This research aims to study the impact of supplementary cementitious materials on the heat of hydration of concrete. The experimental tests were performed for concrete with three size variations and seven variations of supplementary cementitious materials (SCMs) to investigate its impact on the heat of hydration. The SCMs used in this research mainly come from industrial waste materials. Fly ash (FA), ground bottom ash (GBA), and silica fume (SF) were the waste materials used in this research. Tests were carried out for seven days for each variation to observe the effect of volume changes and the addition of SCMs on the change in concrete temperature. The experimental results indicated a direct correlation between concrete volume and maximum temperature, with notable variations in temperature distribution across the concrete mass. Typically, the highest temperature was observed at the core of the concrete. Fly ash (FA) and bottom ash (BA) demonstrated an inverse relationship between their content as supplementary cementitious materials (SCMs) and the maximum temperature achieved. Increasing the proportion of FA and BA in the concrete mixture resulted in a reduction of the hydration temperature. Additionally, silica fume (SF) was found to accelerate the hydration rate, though its efficacy in lowering the heat of hydration was significant only when its content exceeded 5%.

Modeling Reinforced Concrete Column with GRFP Transverse Reinforcement Adena, Haura; Alrasyid, Harun; Sutrisno, Wahyuniarsih; Piscesa, Bambang
Journal of Civil Engineering Vol 40, No 1 (2025)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v40i1.22019

The utilization of GFRP (Glass Fiber Reinforced Polymer) in reinforced concrete structures is gaining attention due to its high strength and low corrosion. The application of GRFP rebar as longitudinal and tranverse reinforced columns has been studied through experimental testing. However it is important to understand the deformation responses and to predict the behavior of concrete columns with GRFP Rebar. This objective requires suitable and effective tools. This study presents Finite Element Analysis of Concrete Column reinforced with GRFP Rebar using 3DNLFEA. The result showed that The analysis result exhibited that the prediction of model behavior corresponds well with the experimental results.

Analysis of Physical and Mechanical Behavior in Cement Treated Soil (CTS) with the Addition of Portland Composite Cement (PCC) and Lime (CaO) to Passive Constraints Ayu Dewadatta, Ni Wayan Amrita; Lestari, Laras Laila; Piscesa, Bambang; Sutrisno, Wahyuniarsih
COMSERVA : Jurnal Penelitian dan Pengabdian Masyarakat Vol. 4 No. 11 (2025): COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/comserva.v4i11.2845

This research aims to analyze the physical and mechanical behavior of soil stabilized with the addition of PCC cement and lime (CaO) as well as the application of passive confinement using a polymer layer reinforced with glass fiber (GFRP). Soil stabilization was carried out by mixing 8% cement and 4% lime based on the optimum mix design results. Soil specimens were compacted using the standard compaction method and tested at 28 days of age. Next, the test specimens were coated with 1, 2, and 3 layers of GFRP to examine the passive effect on compressive strength. The test results show that the addition of PCC cement and lime (CaO) can significantly increase soil strength. Mohr-Coulomb analysis shows cohesion values of 0.032 MPa; 0.046 MPa; and 0.115 MPa, as well as shear angles of 45.46°, 45.08°, and 44.99° for each number of GFRP layers. The application of GFRP as a passive restraint also provides a gradual increase in compressive strength according to the number of layers used. This study proves that the combination of soil stabilization using PCC cement, lime, and the gradual application of GFRP is effective in improving the physical and mechanical properties of the soil, particularly for construction needs that require high load-bearing capacity.

Study of Mohr-Coulomb Parameters in Clay Soil with the Addition of PCC Cement (Portland Cement Composite) and Lime (CAO) Under PassiveConfinement of GFRP (Glass Fiber Reinforced Polymer) Ayu Dewadatta, Ni Wayan Amrita; Lestari, Laras Laila; Piscesa, Bambang; Sutrisno, Wahyuniarsih
COMSERVA : Jurnal Penelitian dan Pengabdian Masyarakat Vol. 4 No. 11 (2025): COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/comserva.v4i11.2845

This research aims to analyze the physical and mechanical behavior of soil stabilized with the addition of PCC cement and lime (CaO) as well as the application of passive confinement using a polymer layer reinforced with glass fiber (GFRP). Soil stabilization was carried out by mixing 8% cement and 4% lime based on the optimum mix design results. Soil specimens were compacted using the standard compaction method and tested at 28 days of age. Next, the test specimens were coated with 1, 2, and 3 layers of GFRP to examine the passive effect on compressive strength. The test results show that the addition of PCC cement and lime (CaO) can significantly increase soil strength. Mohr-Coulomb analysis shows cohesion values of 0.032 MPa; 0.046 MPa; and 0.115 MPa, as well as shear angles of 45.46°, 45.08°, and 44.99° for each number of GFRP layers. The application of GFRP as a passive restraint also provides a gradual increase in compressive strength according to the number of layers used. This study proves that the combination of soil stabilization using PCC cement, lime, and the gradual application of GFRP is effective in improving the physical and mechanical properties of the soil, particularly for construction needs that require high load-bearing capacity.

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