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TEKNIK

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Published by Universitas Diponegoro

ISSN : 08521697 EISSN : 24609919 DOI : -

Core Subject : Engineering,

Engineering

Journal yang mempublikasikan artikel-artikel ilmiah dari berbagai disiplin ilmu rekayasa/keteknikan. Artikel-artikel yang dipublikasikan di Jurnal TEKNIK meliputi hasil-hasil penelitian ilmiah asli (prioritas utama), artikel ulasan ilmiah yang bersifat baru (tidak prioritas), atau komentar atau kritik terhadap tulisan ilmiah yang dipublikasikan oleh Jurnal TEKNIK.

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Articles 10 Documents

Search results for , issue "vol 29, no 2 (2008)" : 10 Documents clear

TEKNIK – Vol. 29 No. 2 Tahun 2008, ISSN 0852-1697 139 *) Staf Pengajar Jurusan D III Teknik Sipil Fakultas Teknik Undip TEGANGAN SEKUNDER PADA STRUKTUR RANGKA BATANG Parhimpunan Purba
TEKNIK Vol 29, No 2 (2008)
Publisher : Diponegoro University

In our previous analysis of trusses, it was always assumed that the truss members are joined by idealhinges and that loads are applied only at joints. The centroidal axes all of members are stright,coincide with the lines connecting the joint center, and lie in a plane that also contains the lines ofaction of all the loads and reaction. Thus the members of truss are subjected to axial force only, andthese can be determined by static method. A stress analysis base on these assumtion leads to thedetermination of so – called “primary stresses”.In actual cases the joint are usually riveted or welded; and because of this fact the members undergo,not only axial forces, but also bending stresses from secondary moment, cuased by this condition arecalled “secondary stresses”. In discusing secondary stresses we shall consider only trussses in oneplane and assume that this plane represents the plane of symmetri for all members and that externalloads are acting in the same plane. Of these the most important are caused by the fact that the jointare rigid, and hence the members are not free to change their relative directions when the truss isdeformed. This problem can likewise be solved very eficiently by means of moment distibution.From the first analyze result, it was obtained the scondary tension ratio with the primary tension at thepull shaft about 19.20 %. This result is significant that it will increase the existence of primary tension.At the analyze by SAP 2000 is obtained that the end tension much more lower than the scondarytension in the first analyze. This is need to obtain attention at planning trusses.

GEOLOGI KAMPUS TEMBALANG Wahju Krisna H; Fahrudin Fahrudin
TEKNIK Vol 29, No 2 (2008)
Publisher : Diponegoro University

Geological conditions at Tembalang areas and surround, Semarang, as a Undulating – Hillockymorphological. That’s can be representation lithological and structural conditions. This surveysused the Geoelectrical sounding and combined with geological surface mapping. There are 15points sounding of Geoelectrical, after interpreted with geological surface mapping, can beconclusion the Breccias lithologic overlay on the upper of Limestones lithologic and finding thereverse fault in the part north of areas survey.

EVALUASI KINERJA HEAT EXCHANGER DENGAN METODE FOULING F Bambang Setyoko
TEKNIK Vol 29, No 2 (2008)
Publisher : Diponegoro University

The performance of heat exchangers usually deteriorates with time as a result of accumulation of depositson heat transfer surfaces. The layer of deposits represents additional resistance to heat transfer and causesthe rate of heat transfer in a heat exchanger to decrease. The net effect of these accumulations on heattransfer is represented by a fouling factor Rf , which is a measure of the thermal resistance introduced byfouling.In this case, the type of fouling is the precipitation of solid deposits in a fluid on the heat transfer surface.The mineral deposits forming on the inner and the outer surfaces of fine tubes in the heat exchanger. Thefouling factor is increases with time as the solid deposits build up on the heat exchanger surface. Foulingincreases with increasing temperature and decreasing velocity.In this research, we obtain the coefisien clean overal 5,93 BTU/h.ft2.oF, Dirt factor 0,004 BTU/h.ft2 0F,Pressure drope in tube 2,84 . 10-3 Psi and pressure drope in shell 4,93 . 10-4 Psi.This result are less thanthe standard of parameter. Its means this Heat exchanger still clean relativity and can operate continousslywithout cleaning.

TESTING OF CONCRETE PAVING BLOCKS THE BS EN 1338:2003 BRITISH AND EUROPEAN STANDARD CODE Purwanto Purwanto; Yulita Arni Priastiwi
TEKNIK Vol 29, No 2 (2008)
Publisher : Diponegoro University

Concrete paving blocks are the choice for road and urban road’s surfacing. Besides their ease inapplication, they also provide design freedom by coloring off the material.Of major importance is their compression strength. The Indonesian SNI categorizes strength to theirpurposes i.e., for parking areas, pedestrian walking areas and heavy industrial estates.According to the SNI 03 – 0691 -1989 and British Standard BS 6717:1986 the strength of a paving blockis determined by the maximum carrying capacity under distributed load. The blocks are placed under acompression apparatus, and the compression strength at failure is recorded.As being observed in the field paving block’s failure pattern differs as to the failure under distributedloading. The paving’s failure mode is distinguished by a bending failure plain at the smallest crosssection.The BS EN 1338 code proposes a different approach. This paper will discuss the methods being used inthe BS EN 1338 code, and evaluates the effectiveness of Indonesian standards to date.

KRITIK TERHADAP PENYEDIAAN RUANG BAGI WANITA DALAM PERUMAHAN REAL-ESTATE Bharoto Bharoto
TEKNIK Vol 29, No 2 (2008)
Publisher : Diponegoro University

One of gender issues in architecture is domesticity, space in a home. According to feminist perspectivehome spatial design must be consider women’s spatial use for housework activities. Preliminaryresearch shows that mothers of a household tend to use kitchen, living room, and master bedroom intheir everyday activities so there must be connectedness appearance among those spaces. In fact, homedesign in Indonesia pays less attention to it. This research aimed to find out how far real-estatedeveloper accommodates the women’s spatial use for housework activities on their products. Data isobtained from 81 real estate advertisements on newspaper. The data is treated by content analysis tofind the offering items on the advertisement. The result show that 19% real- estate developers use facilityof housing and environment as superiority on their products and only 3.5% of them use householdspatial needs. It can be concluded that home design in Indonesia pay less attention to women’s spatialuse for housework activities

ZONA KERENTANAN AIRTANAH TERHADAP KONTAMINAN DENGAN METODE DRASTIC Putranto T.T Putranto T.T; Benny Kuswoyo
TEKNIK Vol 29, No 2 (2008)
Publisher : Diponegoro University

Almost all groundwater resources are vulnerable to various degrees. Vulnerability of groundwater is arelative, dimensionless property that is not directly measurable. It is assesed by using the DRASTICtechnique. The accuracy of its assessment depends, above all, on the amoun and quality of representativeand reliable data available. The required data is often not available and thus scale of mapping os oftenlimited to broad scale catchment maps. The DRASTIC vulnerability mapping technique can generally bereferred to as a composite description of all the major geologic and hydrogeologic factors that affect andcontrol groundwater movement, into, through and out of an area. DRASTIC is an acronym for the mostimportant mappable features within the hydrogeologic setting which control groundwater pollution.These features are: D (Depth to watertable), R (Net) Recharge, A (Aquifer media), S (Soil media), T(Topograhy/slope), I (Impact of vadoze zone) and C (hydraulic Conductivity of aquifer).

RANCANG BANGUN KOTAK PENYIMPAN IKAN BERINSULASI UNTUK MEMPERTAHANKAN KUALITAS IKAN DENGAN PROSES PENDINGINAN SERTA APLIKASINYA PADA IKAN TONGKOL (AUXIS THAZARD) Margaretha Tuti Susanti; Parhimpunan Purba
TEKNIK Vol 29, No 2 (2008)
Publisher : Diponegoro University

Fish Cooler Box Have Designed With Measurement 50 X 70 X 40 Cm, with layers box wall and the partfrom out box : fiber glass, strerofoam wood and fiber glass. The boxes will be aplicate for tongkol fish(Auxis thazard) preservation. Variation that done in this research is comparation between ice and fish.topreservation times. Parameter that measured are fish quality like : fat degradation with TMA method,protein degradation with TVB method, rotten with TMAO method, and organoleptic test like : smell,appearence, texture. Result of this research with that parameter tests are : comparation between ice andfish 2:1, but with comparation 1:1 fish quality is still good for consumption

SIMULASI PENGELOLAAN SAMPAH KOTA DENGAN POWERSIM Setia Budi Sasongko
TEKNIK Vol 29, No 2 (2008)
Publisher : Diponegoro University

This article is developed based on the previous articles in this journal about municipa solid waste (MSW)or rubbish in municipal which should be well managed to withdraw from negative effect. Based on thesecondary data can be prepared computation model using Powersim as the objective of this article.Application of Powersim is also discussed in this article to develop operation of the simulator. Thesimulation of the municipal solid waste management is the action to replicate the real situation or event toget the effect or appearance system. The results of computation model by Powersim can be simulatedseveral activities of the municipal solid waste such as the environmentalist or the decision maker to carryout clean municipal.

PEMBUATAN PUPUK KALIUM-FOSFAT DARI ABU KULIT KAPOK DAN TEPUNG FOSFAT SECARA GRANULASI Aprilina Purbasari; Faleh Setia Budi
TEKNIK Vol 29, No 2 (2008)
Publisher : Diponegoro University

Kapok-husk ash containing + 28% potassium can be used as raw material of potassium-phosphatefertilizer. In this research, kapok-husk ash is mixed with phosphate powder by granulation process toproduce potassium-phosphate fertilizer. Operation variables are granulation time (4, 7, 10 minutes),kapok-husk content (3, 5, 7, 9 %-w/w), and adhesive liquid type (phosphoric acid solution andaquadest). The result shows that the increasing granulation time is proportional to fertilizer yield;the increasing kapok-husk ash content is proportional to potassium content, but inverselyproportional to phosphate content in fertilizer; and phosphoric acid solution is better than aquadestas adhesive liquid referred to fertilizer yield.

KUALITAS VERSUS STANDAR Arfan Bakhtiar
TEKNIK Vol 29, No 2 (2008)
Publisher : Diponegoro University

This paper discusses about standard and quality and the relation between those variables. The resultdescribes the strong relationship and contribution to the product successfulness in the trade and business.Based on the literature reviewed, it is clear that company products (goods and services) are basicallycompetitive if the product refered to designated standard. Standard automatically assures the quality of theproduct in the business trade

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