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INDONESIA
Civil Engineering Dimension
Published by Universitas Kristen Petra Surabaya
ISSN : 14109530     EISSN : 1979570X     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
The Civil Engineering Dimension (Dimensi Teknik Sipil) is a refereed journal, published twice a year, in March and September.
Arjuna Subject : -
Articles 466 Documents
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Estimating Young’s Modulus and Modulus of Rupture of Coconut Logs using Reconstruction Method Bahtiar E.T.; Nugroho N.; Surjokusumo S.
Civil Engineering Dimension Vol. 12 No. 2 (2010): SEPTEMBER 2010
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (319.818 KB) | DOI: 10.9744/ced.12.2.65-72

Abstract

This research develops a theory of the so called reconstruction method to estimate the Young’s modulus (E) and modulus of rupture (SR) of coconut logs. The reconstruction method includes among others; flexure test on small-clear specimens, which were taken from locations distributed along the horizontal as well as vertical direction inside the logs. Further, the estimated E and SR were acquired by arranging systematically each of the small clear specimens as if back in the original location in the logs. The estimation was assisted by mechanical theory, statistics (best fit multiple regression equations), mathematics (calculus), and geometry approach. This reconstruction method successfully estimates E and SR of the coconut logs. The average estimated E and SR value as acquired from tree sample number 1 and 2 were 8,118– 8,596 MPa, and 118–124 MPa, respectively. Those two values were still comparable to common US wood species used for construction i.e. 6,660–15,000 MPa (for E); and 58–132 MPa (for SR). Moreover those estimations of E and SR correlated significantly with each other. This again strengthens the reliability and representativeness of the E and SR values for coconut logs as acquired using the proposed reconstruction methods.
PERHITUNGAN KAPASITAS PENAMPANG KOLOM BETON MUTU TINGGI YANG TERKEKANG DENGAN BLOK TEGANGAN SEGIEMPAT EKIVALEN (Dimensi Teknik Sipil, Vol. 5, No. 1, Maret 2003, hal. 45-49) Rachmat Purwono
Civil Engineering Dimension Vol. 5 No. 2 (2003): SEPTEMBER 2003
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16.344 KB) | DOI: 10.9744/ced.5.2.pp. 113-114

Abstract

Abstract in Bahasa Indonesia :
ANALISA PRODUKTIFITAS PEKERJA DENGAN METODE WORK SAMPLING STUDI KASUS PADA PROYEK X DAN Y Andi Andi; koento danny wibowo; Andri Prasetya
Civil Engineering Dimension Vol. 6 No. 2 (2004): SEPTEMBER 2004
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (182.54 KB) | DOI: 10.9744/ced.6.2.pp. 72-79

Abstract

There are various methods that can be employed to measure construction labor productivity. However it is difficult to measure accurately the labor productivity. Work sampling is a relatively easy- to-use method for measuring productivity. The main objective of this research is to analyze labor productivity on projects X and Y utilizing work sampling method. The productivity measure obtained from the analysis is labor utilization rate (LUR). Besides, this research is intended to investigate factors influencing the LUR in both projects by way of questionnaire. The work sampling analysis shows that in overall LUR of project X and Y was 55.13% and 44.45% respectively. Comparison of LUR on the same types of works indicates that productivity of project X was higher. The questionnaire analysis further confirms that in general the conditions of the influencing factors in project X were better that those in project Y, and that three factors were found significantly different, i.e. material, scaffolding and schedule. The research also details LUR analyses based on the labor working hours (morning, noon, and afternoon). Abstract in Bahasa Indonesia : Terdapat banyak metode yang bisa digunakan untuk mengukur produktivitas tenaga kerja di lapangan. Namun, pengukuran produktivitas tenaga kerja secara akurat sulit dilakukan. Work sampling adalah salah satu metode pendekatan yang bisa digunakan untuk mengukur produktivitas dengan cukup mudah. Tujuan utama dari penelitian ini adalah untuk menganalisa produktivitas pekerja pada proyek X dan Y dengan metode work sampling. Ukuran produktivitas yang didapat dari analisa ini adalah labor utilization rate (LUR). Selain itu, penelitian ini juga meninjau faktor-faktor yang dapat mempengaruhi LUR di kedua proyek tersebut dengan cara kuesioner. Hasil analisa work sampling menunjukkan bahwa secara keseluruhan LUR pada proyek X dan Y adalah 55,13% dan 44,45%, secara berturut-turut. Perbandingan nilai LUR pada jenis pekerjaan yang sama, menunjukkan bahwa produktifitas pada proyek X lebih tinggi. Analisa kuesioner menunjukkan bahwa secara umum keadaan faktor-faktor di proyek X lebih bagus dari pada di proyek Y, dan tiga faktor ditemukan berbeda secara signifikan, yaitu faktor material, perancah dan schedule. Penelitian ini juga melihat LUR berdasarkan jam kerja (pagi, siang, dan sore).
Performance of an Existing Reinforced Concrete Building Designed in Accordance to Older Indonesian Seismic Code: A Case Study for a Hotel in Kupang, Indonesia Pamuda Pudjisuryadi; Benjamin Lumantarna; Ryan Setiawan; Christian Handoko
Civil Engineering Dimension Vol. 20 No. 1 (2018): MARCH 2018
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (710.237 KB) | DOI: 10.9744/ced.20.1.35-40

Abstract

The recent seismic code SNI 1726-2012 is significantly different compared to the older code SNI 1726-2002. The seismic hazard map was significantly changed and the level of maximum considered earthquake was significantly increased. Therefore, buildings designed according to outdated code may not resist the higher demand required by newer code. In this study, seismic performance of Hotel X in Kupang, Indonesia which was designed based on SNI-1726-2002 is investigated. The structure was analyzed using Nonlinear Time History Analysis. The seismic load used was a spectrum consistent ground acceleration generated from El-Centro 18 May 1940 North-South component in accordance to SNI 1726-2012. The results show that Hotel X can resist maximum considered earthquake required by SNI 1726-2012. The maximum drift ratio is 0.81% which is lower than the limit set by FEMA 356-2000 (2%). Plastic hinge damage level is also lower than the allowance in ACMC 2001.
Mechanical Properties of Clayey Sand Treated with Cement-Rubbershreds Chan C.M.
Civil Engineering Dimension Vol. 14 No. 1 (2012): MARCH 2012
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (538.521 KB) | DOI: 10.9744/ced.14.1.7-12

Abstract

Residual soils of clayey sand composition can potentially be treated to construct a 2-layer pavement system. Using cement as the primary binder and recycled rubbershreds (<2 mm thick, 0.425 mm - 12 mm in length) as filler material, the improved ground can serve as a reliable road foundation, overlain with a surface capping layer. In order to determine the performance of this treated foundation layer, the relevant mechanical properties were examined using suitable laboratory tests, i.e. compaction, unconfined compressive strength and bender element tests. From the test results, it can be concluded that a mixture of cement and recycled rubbershreds effectively enhanced the mechanical properties of the soil. The cement dosage was kept at a minimum to bind the soil and rubbershreds for long term durability, while the rubbershreds served as a flexible filler material, without compromising the targeted strength and compressibility.
TINGKAT KEMATANGAN MANAJEMEN PROYEK: SURVEI DI BEBERAPA TEMPAT DI INDONESIA Achmad Fuad Bay; Connie Susilawati; Martin Skitmore
Civil Engineering Dimension Vol. 7 No. 2 (2005): SEPTEMBER 2005
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (233.2 KB) | DOI: 10.9744/ced.7.2.pp. 81-89

Abstract

This paper presents the results of a pilot survey aimed at ascertaining the level of project management maturity in Indonesian companies. Kerzner’s Level 2 assessment tool was used, which basically assesses maturity levels throughout the various phases of an organization’s project management life cycle. This study compare maturity of current situation and expectation of 70 respondents working in 6 different types of organizations in Indonesia. Differences were identified between types of organisations, with the Financial Institutions, Consultants and Manufacturers belonging to a group with higher current maturity scores, while Consultants, Manufacturers and Service Providers belonging to a group with higher expected future maturity scores. There were no significant differences between the results for the various stages of the project life cycle. The results indirectly confirm that the organisations of the participants of the survey are less effective/excellent than they could be. Abstract in Bahasa Indonesia : Makalah ini menyajikan hasil survei awal yang bertujuan untuk menentukan tingkat kematangan perusahaan-perusahaan di Indonesia dalam menggunakan metodologi manajemen proyek. Alat ukur yang digunakan adalah Kerzner Tingkat 2, yang mengukur tingkat kematangan melalui berbagai tahapan dari siklus manajemen proyek sebuah organisasi. Studi ini membandingkan tingkat kematangan saat ini dan harapan di masa mendatang terhadap 70 responden yang bekerja di enam jenis organisasi di Indonesia. Hasil survei menunjukkan adanya perbedaan antara berbagai jenis organisasi. Institusi financial, konsultan dan industri barang termasuk dalam kelompok yang nilai kematangannya lebih tinggi untuk kondisi saat ini, sedangkan konsultan, industri barang dan industri jasa termasuk kelompok yang mengharapkan kematangan lebih tinggi di masa mendatang. Tidak ada perbedaan yang signifikan antara tingkat kematangan pada berbagai tahapan pada siklus proyek. Hasil penelitian ini secara tidak langsung menegaskan bahwa organisasi yang disurvei kurang efektif dari yang seharusnya bisa dicapai.
ANALISIS KONSERVASI ENERGI MELALUI SELUBUNG BANGUNAN Sandra Loekita
Civil Engineering Dimension Vol. 8 No. 2 (2006): SEPTEMBER 2006
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (215.408 KB) | DOI: 10.9744/ced.8.2.pp. 93-98

Abstract

Ventilating and Air Conditioning system consumes 50-70% of the total energy used in an office building. The cooling load of a building consists of internal cooling load, i.e. loads produce by light, occupants, and heat generating power/appliances; and external cooling load, i.e. loads produce by radiation, conduction, and ventilation/infiltration through building envelope. To reduce the external cooling load, SNI 03-6389-2000 specifies that the Overall Thermal Transfer Value (OTTV) should be less than or equal to 45 Watt/m². This research supports energy conservation in finding the optimum building envelope design by specifying the Window to Wall Ratio (WWR) which will fulfill the OTTV requirement. Five office buildings in Jakarta, eight story and above are used in this study. The result shows that WWR less than or equal to 0.40 will produce OTTV value that suits the SNI 03-6389-2000 requirement. It is also shown that OTTV value is not the only factor that guarantees energy conservation. Abstract in Bahasa Indonesia : Sistem tata udara menggunakan 50-70% energi dari keseluruhan energi listrik yang digunakan dalam sebuah bangunan gedung perkantoran. Beban pendinginan dari suatu bangunan gedung terdiri dari beban internal, yaitu beban yang ditimbulkan oleh lampu, penghuni serta peralatan lain yang menimbulkan panas dan beban external yaitu panas yang masuk dalam bangunan diakibatkan oleh radiasi matahari, konduksi dan ventilasi/infiltrasi melalui selubung bangunan. Untuk mengurangi beban external, SNI 03-6389-2000 menentukan kriteria disain yaitu Overall Thermal Transfer Value (OTTV) harus lebih kecil atau sama dengan 45 Watt/m². Untuk mempermudah perencanaan untuk mendukung upaya konservasi energi penelitian ini berusaha mencari Window to Wall Ratio (WWR) yang dapat memenuhi OTTV yang disyaratkan. Studi dilakukan pada lima gedung perkantoran di Jakarta, yang memiliki ketinggian lebih dari delapan lantai. Hasil penelitian ini menunjukkan WWR lebih kecil atau sama dengan 0,40 menghasilkan nilai OTTV memenuhi syarat yang ditentukan oleh SNI 03-6389-2000. Ditunjukkan pula bahwa nilai OTTV bukan satu-satunya batasan yang menjamin gedung hemat energi
SUDUT PENYEBARAN BEBAN PONDASI DANGKAL DI ATAS TANAH URUG Sugie Prawono
Civil Engineering Dimension Vol. 1 No. 2 (1999): SEPTEMBER 1999
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (347.574 KB) | DOI: 10.9744/ced.1.2.pp. 65-72

Abstract

Existing theories of stress distribution in a homogeneous soil do not consider the effect of soil density, even though the density test is always used to check the quality of compacted fill. It is always assumed that a surface load is distributed in the soil beneath the foundation through an angle of distribution from the vertical direction. The purpose of this research is to check the relationship of the density and thickness of a filling material to the angle of distribution. Results of this investigation concluded that the angle of distribution will increase if the compacted soil was made more compact in a reduced thickness. Effect of soil density is more dominant compared to the thickness of the fill Abstract in Bahasa Indonesia : Teori distribusi tegangan dalam tanah yang homogen tidak memperhitungkan pengaruh kepadatan tanah, sedangkan metode perbaikan tanah dengan urugan justru mengandalkan kepadatan tanah urugan ini. Distribusi tegangan dalam tanah dapat dianggap sebagai hasil penyebaran beban melalui suatu sudut penyebaran tertentu, yang diukur terhadap sumbu vertikal. Penelitian ini bertujuan untuk mengetahui hubungan kepadatan dan tebal suatu tanah urug dengan sudut penyebaran tersebut. Hasil penelitian menyimpulkan bahwa sudut penyebaran (a) makin besar bilamana kepadatan tanah urug (gdry) ditingkatkan dan tebalnya dikurangi. Pengaruh kepadatan terhadap sudut penyebaran lebih dominan daripada ketebalan
Influence of Rainfall Patterns on the Instability of Slopes Muntohar, A.S.; Ikhsan, J.; Liao, H.J.
Civil Engineering Dimension Vol. 15 No. 2 (2013): SEPTEMBER 2013
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (657.952 KB) | DOI: 10.9744/ced.15.2.120-128

Abstract

The assessment of rainstorm-induced shallow landslides is still a research topic of wide concern for scientists and engineers. This paper examined the effect of rainfall intensity distribution on shallow landslides. Four synthetic rainfall distributions comprising uniformed, delayed, centralized, and advanced, were selected to examine the effect of rainstorm patterns on slope failure. The infiltration was modeled using Green-Ampt equation, while an infinite slope was selected to model the shallow landslide. Monte Carlo Simulation was applied to analyze the failure probability of the slopes. Two landslide cases were selected to examine the proposed model. The results indicated that among the four representative rainstorm patterns, the advanced rainfall pattern caused worst slope stability. The advanced rainfall pattern resulted in the shortest rainfall duration threshold for landslide occurrence, followed by the central, uniform, and then delayed rainfall pattern. The probabilistic analysis method was suitable to estimate the time of failure for the evaluated landslide cases.
A REGIONAL REFINEMENT FOR FINITE ELEMENT MESH DESIGN USING COLLAPSIBLE ELEMENT Priyo Suprobo; Tavio Tavio
Civil Engineering Dimension Vol. 2 No. 2 (2000): SEPTEMBER 2000
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (497.119 KB) | DOI: 10.9744/ced.2.2.pp. 83-91

Abstract

A practical algorithm for automated mesh design in finite element analysis is developed. A regional mixed mesh improvement procedure is introduced. The error control%2C algorithm implementation%2C code development%2C and the solution accuracy are discussed. Numerical example includes automated mesh designs for plane elastic media with singularities. The efficiency of the procedure is demonstrated. Abstract in Bahasa Indonesia : regional+refinement%2C+mesh+generation%2C+isoparametric+element%2C+collapsible+element

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