Claim Missing Document
Check
Articles

Found 15 Documents
Search

SHEAR BEHAVIOUR ANALYSIS OF REINFORCED CONCRETE BEAM USING NON-LINEAR FINITE ELEMENT SIMULATION Rahmat Dwi Sutrisno; Harun Alrasyid; Wahyuniarsih Sutrisno
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.v37i1.12602

Abstract

This paper investigates shear behaviour of reinforced concrete using multi-surface plasticity model. This analysis uses nonlinear finite element simulation using 3D-NLFEA finite element package. The experimental data adopted from the results of experimental test on eighteen beams where nine beams carried out by Bresler and Scordelis in 1963 and similar nine beams carried out by Vecchio and Shim in 2004. The constitutive model for the concrete material which used in this simulation is based on the plasticity-fracture model and considered the tension stiffening effect for the concrete. The result of the numerical simulation latter compared with the experimental test including load-deflection response, cracking pattern, and failure mode. Based on the analysis result, it was found that the load-deflection response shows slightly higher response compared with the experimental result. However, the cracking pattern and failure mode of the beam shows good result which is in compliance with the experimental test.
NUMERICAL SIMULATION OF NON – UNIFORM CORROSION INDUCED CRACKING Sylviah Rizky Novia Anwaari; Harun Alrasyid; Wahyuniarsih Sutrisno
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.v37i2.13719

Abstract

This research is focused on modeling the damage of concrete due to corrosion. The load used in this paper is only focused on the internal load due to rust expansion. In this study, corrosion was modeled uniformly and non-uniformly to investigate the difference between these two configurations to the damage in concrete. The simulation in this study was carried out using the 3DNLFEA program. The results show that numerical simulation provides predictions that are in line with experimental and numerical modeling results performed by the previous study in terms of pressure and corrosion cracking patterns. From the crack analysis, the pattern found that a non-uniform corrosion model can be used to express a realistic rust corrosion development around the reinforcement. Meanwhile, uniform corrosion requires a larger loss of steel area to reach the damage stage. Therefore, for non-uniform corrosion, the corrosion rate cause cracks and reaches a limiting crack width at earlier times in the service life of the corroded part.
Modeling Reinforced Concrete Column with GRFP Transverse Reinforcement Haura Adena; Harun Alrasyid; Wahyuniarsih Sutrisno; Bambang Piscesa
Journal of Civil Engineering Vol. 40 No. 1 (2025)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v40i1.7271

Abstract

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 GRFPRebar using 3DNLFEA. The result showed that The analysis result exhibited that the prediction of model behavior corresponds well with the experimental results.
Shear Behavior Simulation of Reinforced Concrete Beam Incorporating Glass Fibber-Reinforced Polymer Shear Reinforcement Rahmat D. Sutrisno; Wahyuniarsih Sutrisno; Harun Alrasyid; Bambang Piscesa; Mudji Irmawan
Journal of Civil Engineering Vol. 39 No. 2 (2024)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v39i2.7280

Abstract

This paper presents the shear behavior of concrete beams incorporating glass fiber-reinforced polymer (GFRP) stirrups using a nonlinear finite element simulation package, 3D-NLFEA. The experimental data was adopted from the test results performed by previous researchers. The constitutive model for the concrete material used in this simulation is based on the plasticity-fracture model and considers the tension-stiffening effect of the concrete. The numerical simulation result was compared with the experimental test, including the ultimate shear forcedeflection response and cracking pattern. Based on the analysis result, it was found that the ultimate shear force-deflection response shows almost the same. For the mean ratio of prediction ultimate shear load to actual ultimate shear load from the experimental result and a coefficient of variation of 1.000 and 0.206%, respectively, and deformation results, the mean ratio of prediction deformations for the mid-shear span and mid-span of 0.966 and 0.941, respectively, with the coefficient of variation for the mid shear span and mid-span of 11.849% and 7.627%, respectively. However, the cracking pattern mode of the beam shows good results, which complies with the experimental test.
Experimental Evaluation of Heat of Hydration in Concrete Incorporating Supplementary Cementitious Materials Adveni Hesty Altisari Lada; Wahyuniarsih Sutrisno; Bambang Piscesa
Journal of Civil Engineering Vol. 39 No. 2 (2024)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v39i2.7281

Abstract

This research aims to study the impact of supplementary cementitious materials on the heatof hydration of concrete. The experimental tests were performed for concrete with threesize variations and seven variations of supplementary cementitious materials (SCMs) toinvestigate its impact on the heat of hydration. The SCMs used in this research mainlycome from industrial waste materials. Fly ash (FA), ground bottom ash (GBA), and silicafume (SF) were the waste materials used in this research. Tests were carried out for sevendays for each variation to observe the effect of volume changes and the addition of SCMson the change in concrete temperature. The experimental results indicated a directcorrelation between concrete volume and maximum temperature, with notable variationsin temperature distribution across the concrete mass. Typically, the highest temperaturewas observed at the core of the concrete. Fly ash (FA) and bottom ash (BA) demonstratedan inverse relationship between their content as supplementary cementitious materials(SCMs) and the maximum temperature achieved. Increasing the proportion of FA and BAin 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 loweringthe heat of hydration was significant only when its content exceeded 5%.
The Effect of Sulfate Exposure on The Mechanical Properties of Conventional Portland Composite Cement Concrete Hazen Masrafat; Wahyuniarsih Sutrisno; Yuyun Tajunnisa
Journal of Civil Engineering Vol. 39 No. 2 (2024)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v39i2.7287

Abstract

The durability of concrete is an essential factor in construction as a means to enhance the quality of public facilities planning. The durability of concrete structures can be degraded due to several factors, one of the factors is sulfate attack concrete. Expose to magnesium sulfate (MgSO4) causes more aggressive damage compared to sodium sulfate. The negative effect of sulfate exposure is the accelerated formation of microcracks that lead to concrete deterioration. This study aims to investigate the influence of expose to a 5% magnesium sulfate solution on the mechanical properties of Portland composite cement concrete (PCC). Sulfate exposure was conducted after the PCC concrete was cured in water for 28 days. Observations and testing were carried out in four stages: before exposure, after 28, 56, and 90 days. The compressive strength of the concrete increased by 8.78% after 56 days of exposure but decreased by 7.2% from the 56-day strength during the 90-day exposure. The modulus of elasticity, Poisson's ratio, tensile strength, and fracture energy were directly proportional to the compressive strength values generated during sulfate exposure. Additionally, the mass of the concrete increased by 0.87% after 56 days of exposure and then decreased to 0.56% during the 90-day exposure.
Optimization of Pre-Treatment Process in Spent Bleaching Earth (SBE) on The Characteristics of Pre-Treated SBE as Supplementary Cementitious Material Christian Y. Pramono; Wahyuniarsih Sutrisno; Triwulan Triwulan; Pujo Aji
Journal of Civil Engineering Vol. 39 No. 1 (2024)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v39i1.7303

Abstract

The palm oil processing industry in Indonesia has experienced significant growth,bringing both positive economic impacts and negative consequences, specificallythe generation of spent bleaching earth (SBE), a waste product of bleaching earth.Despite its potential as a substitute material for cement due to its pozzolanicproperties, challenges arise from SBE's oil content. Hence, this study introducespre-treatment methods involving extraction and calcination to optimize the use ofSBE, referred to as Pre-treated Spent Bleaching Earth (PSBE). This research aimsto analyze the optimized PSBE material through the optimization of the pretreatment process in the usage of mortar. The optimized PSBE is compared toanother supplementary cementitious material, which is fly ash to see theperformance of optimized PSBE as supplementary cementitious material. Theperformance of the mortar was evaluated through tests including slump test,compressive strength test, and mortar hydration temperature analysis. The pretreatment process of SBE was optimized by combining extraction and calcinationmethods, which yielded the most effective results from oil content test. One of theperformance analysis results showed that the compressive strength test revealed a28-day compressive strength value of 50,22 MPa for the optimized PSBE mortar,while the fly ash mortar had a compressive strength of 37,36 MPa. In conclusion,the optimized PSBE shows promising potential as a supplementary cementitiousmaterial.
Strength reduction factor of square reinforced concrete column Wahyuniarsih Sutrisno; Bambang Piscesa; Mudji Irmawan
Journal of Civil Engineering Vol. 35 No. 2 (2020)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v35i2.7416

Abstract

Strength reduction factor evaluation of the circular reinforced concrete column with varying eccentricity ratio (e/h) Wahyuniarsih Sutrisno; Mudji Irmawan; Dwi Prasetya
Journal of Civil Engineering Vol. 35 No. 1 (2020)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v35i1.7430

Abstract

This paper presents strength reduction factor evaluation of circular reinforced concrete column with varyingeccentricity ratio (e/h) using the first-order-reliability-methods. The resistance properties of the reinforced concrete column isestimated using the monte-carlo simulation with random normally distributed material properties. Only dead and live loadcombination considered in the analysis. The parameters being investigated when evaluating the resistance of the reinforcedconcrete column are the concrete compressive strength, steel yield strength, coefficient of variation for both the concrete andsteel materials, reinforced concrete column size, and the longitudinal reinforcement ratio. When evaluating the strengthreduction factor, the safety index values are 3.0, 3.5, and 4.0. From the analysis, it was found out that the strength reductionfactor, for e/h higher than one and with safety index equal to 3.0, was equal to 0.9 which agrees well with the ACI 318 strengthreduction factor for tension-controlled region. However, for e/h lower than one and safety index equal to 3.0, the strengthreduction factor was equal to 0.6 which was lower than the ACI 318 strength reduction factor for compression-compressioncontrolled region.
SORPTIVITY AND CHLORIDE PENETRABILITY EVALUATION OF CONCRETE INCORPORATING FLY ASH AND SILICA FUME Wahyuniarsih Sutrisno; Gabriel Ghewa; Priyo Suprobo
Journal of Civil Engineering Vol. 34 No. 2 (2019)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v34i2.7445

Abstract

Diffusion is one of the the main mechanisms of fluid ingress into the concrete. However, in partially saturatedconcrete, the fluid will mainly be absorbed by the capillary suction mechanism, which associates with the sorptivity propertiesof the concrete. This paper presents the results of an experimental program to investigate the influence of Portland cementsubstitution with Silica Fume (SF) and Type F Fly Ash (FA) on the rate of absorption, which also known as sorptivity, andchloride penetration of concrete. The sorptivity of the concrete was evaluated according to ASTM 1585, while the chloridepenetration was evaluated according to ASTM C 1202. By substituting part of cement with FA and SF, it was found that thesorptivity of concrete is reduced. Furthermore, all type of concrete with supplementary material, including CFA, CSF andCSM, is confirmed to enhance the ability of concrete to resist chloride penetration compared yo normal concrete (NC).