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Inersia : Jurnal Teknik Sipil dan Arsitektur

inersia
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Published by Universitas Negeri Yogyakarta

ISSN : 0216762X EISSN : 2528388X DOI : -

Core Subject : Engineering,

Civil Engineering, Building, Construction & Architecture

INERSIA is stand for INformasi dan Ekspose hasil Riset Teknik SIpil dan Arsitektur. This scientific journal is managed by the Department of Civil Engineering and Planning Education, Faculty of Engineering, Yogyakarta State University, in cooperation with the Persatuan Insinyur Indonesia (PII). It publishes and disseminates research results from lecturers and post graduate students from various universities in Indonesia, which has contributed to the development of science and technology, especially in the field of Civil Engineering and Architecture. INERSIA is published twice a year, in May and December.

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Articles 7 Documents

Search results for , issue "Vol 7, No 2 (2011): Desember" : 7 Documents clear

PENGARUH PENAMBAHAN SUPERPLASTISIZER TERHADAP CAMPURAN BETON RINGAN YANG MENGGUNAKAN STYROFOAM Kusnadi Kusnadi; Dewi Sulistyorini
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 7, No 2 (2011): Desember
Publisher : Universitas Negeri Yogyakarta

The risk of failure of structures effect of earthquake be high due to the heavyvolume of concrete has a fairly high (2400 kg/m3). Advances in technology and theimpact of the economic crisis encourage construction of infrastructure use concretemasonry units under 1900 kg/m3 in weight. The use of lightweight concrete is thefiller material styrofoam intend at non structural components like wall. One of theproblem of making lightweight concrete using styrofoam is the low value of slump, sothat the mix becomes difficult (low workability). It is therefore necessary to addmaterial superplastisizer This research used 20 cylinder test samples. Thecomposition of the mixture consists of sand, cement and grain of styrofoam. Thestyrofoam in concrete is 20% in volume. The Sample variation consists of lightweight concrete using styrofoam without superplastisizer is four cylinder, with addedsuperplastisizer four cylinder were 0.5%, 1.0%, 1.5% and 2%, respectively in weightof cement. The results showed the addition of superplastisizer 0.5%, 1%, 1.5% and2% of the cement weight increases the value of slump were 100%, 183%, 216% and507% respectively. The addition of superplastisizer 0.5%, 1%, 1.5% and 2% of thecement weight increase ceompression strength were 8.48% 4.25%, 12.67% and17.37% respectively. The addition of superplasticizer will increases the slump for thesame water content in fresh concrete, so can increase the compressive strength ofconcrete cylinder.Keyword : beton styrofoam, workabilitas, superplasticizer

PENGUASAAN METODE DIAGRAM PANAH SEBAGAI LANGKAH AWAL PEMAHAMAN TERHADAP DASAR-DASAR PENYUSUNAN NETWORK PLANNING METODA JALUR KRITIS Sumardjito Sumardjito
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 7, No 2 (2011): Desember
Publisher : Universitas Negeri Yogyakarta

In order to learn network planning, need an understanding of some of theprovisions. A project is the overall effort in the form of networks planning. The projectconsists of a series of events and activity that construct a system and cycles thatboils down to an outcome. To create an operational plan, project hardwareincluded/required a tool that will give an idea clearly relationship, such as device isnetwork planning. On the operational level, the project network planning method isthe Critical Path Method (CPM). To understand the readings and analysis CPM isnecessary basics Arrow Diagramming Method. In this method will be elaborated andrelationship between activities with other activities, one event relationship with otherevent system and thus forming the structure of work processes. In other words, inthe planning of the CPM, in the first of finishing is elaborated arrow diagram. Thatsmean the network planning has finish a half procces, so the next step will be easilyto finish all diagram. Network planning CPM that initially looks like very complicatedand abstract, but with an understanding of the arrow diagram will be known quickly,which where activities having relationship that are free and which ones areinterdependent, and which part is the critical.Keywords : Network planning, Critical path method

EULER BUCKLING FAILURE MODEL AT GALVANIZED PIPE INFLUENCED BY HOLE DETERIORATION AS PITTING CORROSION MODELLED EXPERIMENTAL APPROACHMENT Miftahul Iman
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 7, No 2 (2011): Desember
Publisher : Universitas Negeri Yogyakarta

Korosi adalah fenomena alam yang tidak dapat dihindari. Hampir seluruhlogam yang mengandung unsur paduan Ferrit akan mengalami peristiwa oksidasisebagai penyebab korosi. Banyak konstruksi sipil yang berada di lingkungan agresifdan merupakan konstruksi-konstruksi vital yang melayani kebutuhan masyarakatbanyak, semisal pelabuhan, off shore structure, crane dan lain sebagainya kurangmemperhatikan dampak korosi yang terjadi pada konstruksi tersebut. Hal inidisebabkan salah satunya oleh formulasi analitik satu dimensi untuk menentukanbeban kritis (Pcr) tidak dapat memberikan model yang optimal terhadap batangaksial tekan dengan penampang yang tidak solid (hollow section) seperti halnyadengan tube atau pipe dari sebuah struktur aksial tekan dengan adanya pengaruhcacat berupa lubang yang dimungkinkan akibat reaksi korosi dalam bentuk pitting.Penelitian ini mengembangkan model laboratorium yang mengunakanprototype pipa galvanis sebanyak 16 sampel yang terdiri dari 3 sampel untuk ujipendahuluan dan sampel lainnya dengan lubang pada tengah tinggi kolom denganrincian 3 sampel untuk lubang tunggal, selanjutnya disebut sebagai Single HolePitting (SHP) dan lainnya untuk sampel dengan jumlah lubang lebih dari satu yangterdiri dari sembilan sampel, selanjutnya disebut sebagai Multi Hole Pitting (MHP).Sampel MHP dan SHP memiliki korelasi sedemikian rupa terhadap parametergeometrik yang telah ditentukan sebelumnya.Model eksperimen dalam penelitian ini memberikan nilai cukup baik dan lebihmendekati nilai beban kritis berdasarkan hasil analitik metode Euler. Meskipundemikian nilai tersebut sangat tergantung pada besaran nilai modulus elastisitas (E)yang berikan pada formulasi Euler tersebut. Hasil penelitian menunjukkan Pcr bendauji SHP lebih rendah daripada benda uji MHP (D24 = 15382,48 N 6D4 = 15663,2N). Begitu juga halnya dengan pengujian laboratorium namun efek 3-arah tekukyang ditimbulkan oleh pipa galvanis menunjukkan perilaku yang unik terutama padakekakuan dan orientasi tekuk yang terjadi. Penelitian ini juga membuktikan bahwategangan dan kosentrasi tegangan yang terjadi pada saat tekuk belum mencapaitegangan leleh.Kata kunci: Tekuk Euler, Korosi pitting, modulus elastisitas

PENGARUH TEBAL SELIMUT BETON NORMAL PADA LAJU KOROSI BAJA TULANGAN Pramudiyanto Pramudiyanto; A. Triwiyono A. Triwiyono; HRC Priyosulistyo
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 7, No 2 (2011): Desember
Publisher : Universitas Negeri Yogyakarta

Corrosion of steel reinforcement is the main cause of deterioration andpreliminary failure of reinforced concrete construction. The effect is the large amountof funding to repair, restore and replace the broken part. The aim of this research isto figure out the corrosion process on the reinforcement of concrete construction withlocal aggregate in the salt water environment. The specific aim is to find out thecorrosion rate of steel reinforcement having concrete compression strength between25 MPa to 30 MPa.The DC Electrochemical Test Method with impressed current technique was used inthis research. The test is using cylinder with various diameter. The reinforcementsteel is placed in the center of cylinder cross section to make a condition of differentcover thickness. The test was conducted 45 days non-stop, observing specimen’spotential change and crack pattern. The corrosion rate and corrosion current density(Icorr) were compute using weight loss of steel. The carbonation test using bufferphenolphthalein was also conducted in this research.The result shows that there’re a downstream trend of corrosion rate and corrosioncurrent density to the concrete cover’s thickness. The corrosion rate of ∅1.25”, ∅3”,∅5” and ∅6” specimens as follow: 4.440981 mm/yr, 1.63395 mm/yr, 0.026253mm/yr and 0.00 mm/yr. The corrosion current density (Icorr) of ∅1.25”, ∅3”, ∅5” and∅6” specimens as follow: 0.000382446 mA/cm2, 0.000141 mA/cm2, 2.2x10-6 mA/cm2and 0.00 mA/cm2.The potential change’s profile will goes down according to the timeof test. The graph of potential change to the time forming a curved line until a timewhen the line becomes straight. The crack pattern started from the region betweenthe submerge and the dry region, then move to the entire part of specimen. Thecarbonation was dominated by corroded specimen.Keyword: corrosion of concrete reinforcement, concrete cover thickness,carbonation, impressed current technique

ANALISIS STABILITAS TALUD BRONJONG UIN SUNAN KALIJAGA YOGYAKARTA Muhammad Rosihun; Endaryanta Endaryanta
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 7, No 2 (2011): Desember
Publisher : Universitas Negeri Yogyakarta

Talud is a building that was built to prevent the collapse of steep soil or slopeswhere stability can not be guaranteed by the slope itself. The analysis in this finalproject aims to determine whether or not securely retaining wall located at theGadjah Wong River UIN Sunan Kalijaga Yogyakarta, strong bearing on the stabilityof the soil, slide and bolster the influence of the earthquake were included. Method ofstability analysis talud bronjong Gadjah Wong River UIN Sunan Kalijaga Yogyakartausing the formula of the source book Harry Christady Hardiyatmo, Foundations ofEngineering I, 2006, namely in the Terzaghi equations, equations Hansen (1970)and Vesic (1975). Talud Bronjong at Gadjah Wong River UIN Sunan KalijagaYogyakarta secure in looking it from the stability of shift. Talud Bronjong at GadjahWong River UIN Sunan Kalijaga Yogyakarta secure in the stability of the overthrowbecause of Fgl sf. Talud Bronjong at Gadjah Wong River UIN Sunan KalijagaYogyakarta secure in the carrying capacity of land due to Qmax ≤ qa ie 581.4 ≤833.64 KN/m2.Keywords: Analysis, Stability, Talud

ANALISIS HOMOGENITAS SELF COMPACTING MORTAR MENGGUNAKAN SERAT POLYPROPYLENE BERDASARKAN KECEPATAN PERAMBATAN GELOMBANG ULTRASONIK (UPVM) Faqih Ma’arif; Slamet Widodo; Agus Santoso
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 7, No 2 (2011): Desember
Publisher : Universitas Negeri Yogyakarta

Nowadays, Non Destructive Tests have been applied in many qualityevaluations of existing concrete structures. One of the Non Destructive Tests (NDT)is based on Ultrasonic Pulse Velocity (UPV). The use of UPV method among othersare to estimate the strength of concrete, to detect the presence of crack, to measurethe homogeneity of concrete, the thickness of concrete slab, and also to estimate thediameter of the embedded steel reinforcement. The NDT technique will apply on thisresearch. This research used 24 cylinder test samples in four groups, which werereference cylinder (SR), cylinder-1 (S-01) with 0.5 kg/m3 of fibers, cylinder-2 (S-02)with 1.0 kg/m3 of fibers and cylinder-3 (S-03) with 1.5kg/m3 of fibers. Those cylinderswere of 150 mm in diameter and 300mm in height. The Ultrasonic Pulse Velocity(UPV) test was conducted with direct test method. The data are then analyzed usingstatistical program. The test result showed that the addition of polypropylene fibersoptimum and pulse velocity were of 1kg/m3 and 3,19km/s respectively. The increasepulse velocity transmitter higher on variation of fibers 1kg/m3 is 9,12% in comparisonto reference cylinder. The statistical test indicated that the signifinance value (2-tailed test) is homogeneity sample. This means that the ultrasonic pulse velocitymethod can used to knowing of homogeneity self compacting mortar using fibers.Keyword: Homogeneity, polypropylene, Ultrasonic pulse velocity Method

EMPIRISISME, SEBUAH PENDEKATAN PENELITIAN ARSITEKTURAL Sativa Sativa
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 7, No 2 (2011): Desember
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v7i2.3683

Empirisism is a paradigm in science philosophy which influences variouskind of research methods, include architectural researches. Using content analysis,this paper aimed to explore empirisism, from many aspects. Those are historydevelopment, characteristics, levels, and also relation of empirisism with otherparadigm, especially rasionalism. In architectural research, empiricism commonlynamed as naturalistic method.This paper concluded that besides has manyimportant roles, empirism also has weakness, so it is better to develop researchesby using both of those paradigms, empirism and rasionalism, especially inarchitectural researches.Keywords: empiricism, paradigm, rasionalism

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