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PENGARUH PENAMBAHAN PASIR SUNGAI PADA BATA MERAH TERHADAP KUAT TEKAN DAN PENYUSUTAN DI TALANG KERING KOTA BENGKULU Fitri Herlina; Elhusna Elhusna; Mukhlis Islam
Inersia: Jurnal Teknik Sipil Vol 7, No 1 (2015)
Publisher : Universitas Bengkulu

This report is the result of the research of the effect of river sand addition to red brick to the shrinkage and the compressive strength of the red brick. The production ofred bricks was done in brick factory in Talang Kering Kota Bengkulu. River sand derived from Taba Penanjung. The composition of the sand used was 0%, 5%, 10%, 15%, 20%, 25%, 30% of the weight of clay with the mold size of 10,5 cm x 21cm x 5 cm. The sample used for shrinkage sample is also used for compressive strength test as many as 140 pieces.Compressive strengthtesting refers to the SNI 03-4164-1996 and use compression tool hand operated machine with a capacity of 250kN. Compressive strength testing performed after the red brick with capping is7 days old. Mortar is made with a ratio of 1: 3 using the mount sandto produce mortar with compressive strength of 3,18 MPa. The results showed thatthe brick color is dominant yelloworange with lack of smooth surface and sharp edge. Depreciation smallest volume and weight of each of the addition of 30% amounting to 34,2% and 28,87%. Depreciation largest volume and weight of each of the addition of 15% sand by 39,7% and amounted to 32,96% without sand.Most powerful press red brick on the addition of 5% sand by 1,72MPa and the smallest on the addition of 30% sand at 1,24MPa. The resulting maximum compressive strength less than 2,5MPa so it does not meet the SII-0021-978.

ANALISIS OPTIMASI BIAYA KONSTRUKSI KOLOM DENGAN VARIASI NILAI ? DAN fc' Gerry Revaldo Gerry Revaldo; Fepy Supriani; Mukhlis Islam
Inersia: Jurnal Teknik Sipil Vol 5, No 1 (2013)
Publisher : Universitas Bengkulu

This research aims to study the most optimum and economical of square reinforced concrete column with the variation of ? and fc'. Process optimization in this study requires repetitive calculations by using a Microsoft Office Excel. Analysis of the cost of construction of reinforced concrete columns square cross-section consists of 840 samples with variation of column section dimensions, compressive strengths of concrete (fc'), nominal axial capacity of columns (Pn), and nominal bending moment capacity of column (Mn). The results of the sample analysis are interaction charts corresponding column dimension and cost and interaction of fc' and cost consisting of 1,152 charts and also produces composite charts from the previous chart, which is the interaction, among dimension, fc', and cost of column consists of 96 graphs with variation column without using formwork, formwork 1 time use, of formwork used 2 times, 3 times and use disposable formwork. Hence from all of the cost of the optimum structure of the column with the variation of the Mn and Pn of could be concluded that the greater the value of Mn while Pn constant the of value of ?, column dimensions, and cost structure would dominantly increase and it could be concluded also that the greater the value of Pn with constant Mn value then the value of ? and the cost structure would dominantly decrease while the dimensions have not changed and the compressive strength of concrete (fc') used are 25 MPa - 30 MPa.

ANALISIS OPTIMASI BIAYA KONSTRUKSI BALOK DENGAN VARIASI NILAI ? DAN fc’ Marrolan Marrolan; Fepy Supriani; Mukhlis Islam
Inersia: Jurnal Teknik Sipil Vol 5, No 1 (2013)
Publisher : Universitas Bengkulu

he research was motivated by the desire to obtain inexpensive (optimum) and adequate capacity of structure. This study aims to determine the variation of ? value and fc' on a single reinforcement concrete beams that can produce the most optimum and economical construction. This study used optimization process that requires repetitive calculations, hence the research was categorized as applied research. This cost analysis of a single reinforced concrete beamconsisted of 200 samples for each concrete compressive strength (fc') of 25-35 MPa with an increment of 2.5 MPa. The results of sample analysis produce ? interactions graphs and charts interaction between cost and fc’. In addition, the cost calculations were made assuming the cost without using formwork and using formwork of once until three time usage. This research produced graphic to observe the most optimal and economic reinforcement ratio. Based on the variation of nominal moment, the values of ? was needed for without formwork cost calculation at range of between 0.56-0.66 (times ? needed max ), and the values of ? was needed for the cost calculation by once until three times formwork assumtion at range of beetwen 0.92-1 (times ?max), 0.75-1 (times ?max), and 0.69-1 (times ?max needed) respectively.

ANALISIS PENAMPANG KOLOM BETON BERTULANG PERSEGI PANJANG BERLUBANG Marzon Marzon; Mukhlis Islam; Elhusna Elhusna
Inersia: Jurnal Teknik Sipil Vol 10, No 2 (2018)
Publisher : Universitas Bengkulu

Installation of pipes (conduit) in the building columns often found in reinforced concrete structures. The installation of pipes inside the columns is utilized as sanitary and mechanical electrical pipes. The case research in this study is to analyze the rectangular column with the applied research type (applied/pratical research). This research aims to analyze the impact of the holes on square rectangular columns. This calculation consists of 675 samples with differentconcrete compression strength (f'c), reinforcement area, holes area, and the dimensions of the column. Analysis of the calculation of hollow rectangular columns using the stress-strain relationship equation developed by Hognestaad. The results of the analysis on hollow rectangular columns resulted in a decrease column capacity. The largest decrease of the rectangular column capacity occurred on holes area of 7%, with concrete compression strength 30 MPa, and dimensions of the column 450 x 1800 mm which is 16.97%.

PENGARUH SERAT SABUT KELAPA TERHADAP KUAT LENTUR BETON DENGAN FAKTOR AIR SEMEN O,5 Elhusna Elhusna; Fepy Supriani; Agustin Gunawan; Mukhlis Islam
Inersia: Jurnal Teknik Sipil Vol 3, No 1 (2011)
Publisher : Universitas Bengkulu

18 slabs of 100x100x500 mm dimension had been tested to find out the influence of coconut fiber as the additive to the flexural strength of concrete. The water ratio of the concrete mix design was 0,5. The percentation of coconut fiber were 1%, 2%, 3%, 4% and 5% of the volume of the specimen. The result showed that the fiber additional to the concrete cause the strength getting higher as the percentation getting bigger. The flexural strength of 5% the fiber was 30% higher than the slab of the concrete without the fiber.

ANALISIS PENGARUH PERGESERAN LUBANG PENAMPANG KOLOM BETON BERTULANG PERSEGI BERLUBANG Rendi Nopradego; Mukhlis Islam
Inersia: Jurnal Teknik Sipil Vol 5, No 2 (2013)
Publisher : Universitas Bengkulu

This Research is based on the difficulty of implementation of the hole installation centered in the middle column. The influence of shifting the hole to column capacity reduction occurs when the hole is shifted towards to the compression area. This study analizes the effect of shifting the hole in rectangular reinforced concrete column against capacity of the column structure decrease. This calculation consists of 144 samples with different compression strength (fc’),reinforcements area, hole area, and dimensions of the column. The analysis is based on the assumption of linear strain distribution in cross section with appropriate stress-strain correlation using Hognestaad equation. Reinforced concrete structural element were analyzedonly experiencing a combination of uniaxial bending moment. The results of the analysis effect of shifting the hollow in rectangular reinforced concrete column decreased capacity of the colomn. The largest decline of the column capacity occured on 100% the shift column holesfrom the hole centered in the middle column on dimension of 600 mm x 600 mm with fc' 30 MPa, reinforcement quality (fy) 400 MPa, reinforcement extensive of 1%, and holes extensive of 7% is 10.38% of axial forces (Pn) and 9.06% of Nominal Moment (Mn). The effect of shifting the hole towards to the compression area is affecting the capacity of hollow in rectangular reinforced concrete column centric decreasing.

PERBANDINGAN ANALISIS KOLOM DENGAN METODE ANALITIS DAN METODE BEDA HINGGA (KASUS KOLOM DENGAN DIMENSI 300x300 mm2, f’ c = 20 MPa, fy = 400 MPa, As + As ’= 1% Ag) Mukhlis Islam
Inersia: Jurnal Teknik Sipil Vol 8, No 2 (2016)
Publisher : Universitas Bengkulu

The aim of this research is to study the feasibility and effectiveness of finite difference method utilization as an alternative method for reinforced concrete column analysis and design tool beside analytical method which is already ratified by many design codes. The background of the research is that the finite difference method is relatively easier to apply as calculation tool by using computers. In this research the finite difference method is applied to calculate the magnitude of concrete stress that was discretized by using concrete stress strain relationship equations proposed by Hognestad (1951). The results of the research show that the application of finite difference method to calculate the axial and bending moment capacity of reinforced concrete column by using the aforementioned concrete stress strain relationship provide good results with deviation of 5.61% up to 18.70% compares to analytical method for axial capacity, and 0.65% up to 4.33% deviation for bending moment capacity, both on the conservative side.

PERILAKU DINAMIK PLAT LANTAI BERBENTANG PANJANG DENGAN DAN TANPA PENGAKU RANGKA BATANG Mukhlis Islam
Inersia: Jurnal Teknik Sipil Vol 1, No 2 (2010)
Publisher : Universitas Bengkulu

The aim of this research is to study the effectiveness and the characteristics of structural dynamics of long span RC slab which is stiffened by the addition of steel truss and to verify the numerical analysis results which might be used in the next stage as material of consideration to analyze and design the stiffening method of any prototype or existing structure in need. The experimental works are carried out by using 2 RC slabs with length, width and thickness are 4,6 x0,96 x 0,05 m respectively, while numerical work shall be carried out by applying structural analysis computer program. The experimental results which are structural dynamic characteristics then will be compared to numerical result.The results of the research show that the behavior of the structure under dynamic loading increased significantly by addition of steel truss, indicated by the increase of structural natural frequency between 15,565% up to 33,33% forseveral type of truss. The results also show that the average difference between experimental and numerical analysis is 4,503%.

Analisis Kekuatan Kolom Komposit Terbungkus Beton Berpenampang Bundar terhadap Kapasitas Tahanan Aksial dan Momen dengan Metode Beda Hingga Rizki Aidil; Mukhlis Islam; Ade Sri Wahyuni; Agustin Gunawan; Yuzuar Afrizal
Inersia: Jurnal Teknik Sipil Vol. 16 No. 1 (2024)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/ijts.16.1.21-28

Composite column structures can provide high strength from the combination of two or more materials with different material properties which then provide better combined properties. This research was conducted by analysing the composite column structure with finite difference method and comparing the results with CSiCol application. The results of the analysis of the Pn and Mn interaction diagram of the finite difference method composite column when compared to the CSiCol application composite column have a maximum percentage difference for the maximum Pn value of 19.17%, the maximum Mn value of 2.90%. The difference in the Pn and Mn values of the composite column can be corrected with a regression equation using a linear correction factor and a Polinomial correction factor, with a maximum Pn percentage difference value of 8.93% for the linear correction factor and 6.84% for the Polinomial correction factor value. Therefore, the finite difference method can be used to analyse composite columns with relatively good accuracy provided that correction factors are used.

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