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All Journal International Journal of Engineering Science and Technology Development (IJEST) Jurnal Teknik Sipil International Conference on Engineering and Technology Development (ICETD) Visionist
Hery Riyanto
Bandar Lampung University
Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Transportation Other

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Use Study on Slight Beam Reinforced Concrete Floor Plate In Lieu of Scondary Beam Hery Riyanto; Sugito SUGITO; Lilies Widodjoko; Sjamsu Iskandar
International Conference on Engineering and Technology Development (ICETD) 2013: 2nd ICETD 2013
Publisher : Bandar Lampung University (UBL)

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Abstract

Use of false beams on reinforced concrete slab instead of the joist is an innovation in the construction of reinforced concrete slab. Where the study was made by using 4 samples of precast concrete slab specimens (PBP). Ie: P1 type - plate only, type P2 - plate with joists, type P3 - small plates with slight beams, type P4 - plate with big apparent beam. The fourth specimen samples made using the Batu Raja cement, sand from Gunung Sugih, and local split Bandar Lampung in the Civil Engineering Laboratory of UBL. The fourth test specimen samples was conducted at the Laboratory of Civil Engineering Unila using method one point load that is placed in the center - the center span in order to get the load and the maximum deflection and crack patterns. The data obtained are used to verify the theoretical calculations. Conclusions will be given at the end of writing.
Effect of Cement Composition in Lampung on Concrete Strength Hery Riyanto
International Conference on Engineering and Technology Development (ICETD) 2014: 3rd ICETD 2014
Publisher : Bandar Lampung University (UBL)

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Abstract

The strength and durability of concrete depends on the composition of its constituent materials ie fine aggregate, coarse aggregate, cement, water and other additives. The cement composition is about 10% acting as a binder paste material fine and coarse aggregates. In the Lampung market there are several brands of portland cement used by the community to make concrete construction. Although there is a standard of the government of portland cement composition, yet each brand of cement has different characteristics. Cement is generally composed of limestone / limestone containing calcium oxide (CaO), clay (clay) containing silica oxide (SiO2), aluminum oxide (Al2O3), iron oxide (Fe2O3) and a cast that serves to control the hardening. Cement manufacturers make products based on chemical elements resulting from the research to make their products better than other products, so although procedurally similar but have different composition and properties. Another difference are the density, start and end time of bonding and strength. This research will be conducted research on several brands of cement in the province of Lampung, among others, vicat test, the consistency test, compression test and bending in reinforced concrete beam structure. From the research it can be shown the cement test results as an input to the user as a result of the unequal nature of the cement.
Analytical and Experimental Study Bamboo Beam Concrete Hery Riyanto; Sugito SUGITO; . Juli
International Conference on Engineering and Technology Development (ICETD) 2013: 2nd ICETD 2013
Publisher : Bandar Lampung University (UBL)

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Abstract

This study is known as the Bamboo Concrete Beams (B3) with bamboo casing as an alternative reinforcement, conducted through experimental methods. The test results were then verified through analytical calculations. Behaviors examined included mechanical properties of bending, beam flexural strength and fracture patterns are burdened by the quasi-static load. Researchers used 16 pieces of the test specimen. Bamboo specimens used in this study is a type of Petung Bamboo (Dendrocalamus Asper), with a long piece of bamboo varies from 2860 mm to 3910 mm, outer diameter of the bottom of the 105 mm to 155 mm and the outer diameter of the upper section of 95 mm to 135 mm, which are grouped into 5 kinds of testing that is,1. Bamboo intact, the inner segments remain, with BA code (2 pieces of the specimen)2. Bamboo intact, the inner segments removed, the code BP (2 pieces of the specimen)3. Bamboo shoots in a section removed (like bamboo pipes) and not given a bamboo rod stud, with code BTS (4 pieces of the test specimen).4. Bamboo shoots in a section removed (like bamboo pipes) and given a bamboo rod stud on the inside along ½ bamboo inner diameter, with code BAS (4 pieces of the test specimen). 5. One side of the split bamboo rod sections with a thickness of 75 mm, inner bamboo segments remain (such as drums) and given a bamboo rod stud on the inside, with code KTGN (4 pieces of the test specimen). Value of the maximum load Pmax, the maximum moment Mmax and max deflection for each specimen according to the results of observation and calculation is as follows 
Damping Factor Of Precast Concrete With Wet Connection Hery Riyanto
International Journal of Engineering Science and Technology Development (IJEST) Vol 1, No 1 (2013): April
Publisher : University of Bandar Lampung (UBL)

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Abstract

This research aims at determining the behaviour of structural elements of precast reinforced concrete beams which are connected with wet and dry connections. Specimen used was 30 Mpa reinforced concrete beams with 6 pieces of 8 mm diameter main reinforcement which are placed on two rollers at the joint pedestal of each end and has a rectangular cross section of prismatic 10x18 cm2. Wet connection is a connection that uses a polymer concrete material of 40 MPa with a grafting method using prepacked method. The result of the research is expected to contribute to the development of precast concrete in building construction in Indonesia. In the elastic condition, the beam monolith has the largest natural frequency of the value, but a wet connection beam has a low natural frequency value. The difference of this natural frequency value is also equal to the condition of crack and ultimate.
Peran Pelatihan Teknis dan Motivasi dalam Pengawasan Teknis Pekerjaan Jasa Konstruksi Hery Riyanto; Dirwansyah Sesunan
VISIONIST Vol 1, No 2 (2012): September
Publisher : Universitas Bandar Lampung (UBL)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (411.317 KB) | DOI: 10.36448/jmv.v1i2.665

Abstract

Technical manager official at government administration is a middle manager that gives priority to decision making accuracy and speed.  Beside of that, he must be able to translate strategic policy to operational policy and solve the operational obstacles that happened. This research aims to analyze factors that affect the speed of decision making as a foundation to formulate the strategy of implementation action. Factors that affect the performance  of technical superviser  to make a decision are technical training and working motivation. These factors are usually given  by technical manager official. The result of this research shows that technical training and working motivation significantly affect the decision making accuracy which determinat coeficient is 88.5%. If the technical training and working motivation is increased, it will increase the performance of technical supervisor 78,3 % per year.Pejabat Pelaksana Teknis Kegiatan pada birokrasi pemerintah adalah manajer menengah yang mengutamakan ketepatan dan kecepatan pengambilan keputusan. Selain itu  harus mampu menterjemahkan kebijakan strategis menjadikan kebijakan operasional, juga harus mampu memecahkan masalah operasional yang ada.  Riset ini bertujuan untuk menganalisis faktor-faktor yang mempengaruhi ketepatan pengambilan keputusan  sebagai dasar untuk merumuskan strategi Pelaksanaan Pekerjaan. Dua variabel utama yang mempengaruhi kinerja tenaga pengawas teknis dalam pengambilan keputusan yaitu Pelatihan Teknis dan Motivasi Kerja yang diberikan Pejabat Pelaksana Teknis Kegiatan. Dari hasil penelitian diketahui bahwa kedua faktor tersebut secara signifikan berpengaruh terhadap ketepatan pengambilan keputusan dengan nilai koefisien determinasi sebesar 88,5 %. Bilamana Pelatihan Teknis dan Motivasi Kerja ditingkatkan, maka skala Kinerja pengawas Teknis dapat meningkat  sebesar 78,3 % dalam satu tahun.
Co-Authors . Juli Dirwansyah Sesunan Lilies Widodjoko Sjamsu Iskandar Sugito