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Civil Engineering Dimension

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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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FAKTOR-FAKTOR STRATEGI POSITIONING DALAM PEMASARAN REALESTAT Suatu Studi Pengalaman Pengembang Realestat di Surabaya Herry Pintardi Chandra
Civil Engineering Dimension Vol. 1 No. 2 (1999): SEPTEMBER 1999
Publisher : Institute of Research and Community Outreach - Petra Christian University

Real estate development needs an exact positioning strategy by knowing the significant factors. Positioning strategy is the combination of marketing actions used to portray the positioning concept to targeted buyers. The factors of positioning strategy in this research are product attribute, product price, product usage, product user, product class, and competitor. The research was focused on ten real estate developers with spesific criteria, i.e : located in Surabaya City, area bigger than 40 ha, in development stage, and average price of land more than Rp. 550.000,- per square meter. The results show that the highest rating is “consumers income” in “product user” factor with a mean of 3.9. Group A + B, and group B rejected null hypothesis, it means at least one of six factors has a different role. The developers can choose the significant factors such as “location” in “product attribute”. Group A accepted the null hypothesis, it means that six factors at positioning strategy have the same role in the real estate marketing. There are some differences in the market positioning between group A and group B. This research also suggests the developers who will choose the factors of positioning strategy to consider the external strength and emphasize in “consumer income” and “location”. Abstract in Bahasa Indonesia : Pengembangan realestat memerlukan strategi positioning yang tepat dengan mengetahui faktor-faktor yang signifikan. Strategi positioning adalah kombinasi dari tindakan pemasaran yang digunakan untuk memberikan gambaran konsep positioning kepada pembeli yang ditargetkan. Faktor-faktor strategi positioning dalam penelitian ini adalah atribut produk, harga produk, pemakaian produk, pemakai produk, kelas produk, dan pesaing. Penelitian difokuskan kepada sepuluh pengembang realestat di Surabaya dengan kriteria spesifik yaitu merupakan lahan di dalam kota Surabaya luas lahan lebih besar 40 ha, berada dalam tahap pengembangan, dan harga jual kavling rata-rata di atas Rp. 550.000,- per meter persegi. Hasilnya menunjukkan bahwa peringkat tertinggi adalah “pendapatan konsumen” yang terdapat dalam faktor “pemakai produk” dengan nilai rata-rata sebesar 3,9. Grup A + B, dan grup B menolak hipotesis null, artinya sekurang-kurangnya ada satu diantara enam faktor tersebut mempunyai peran yang berbeda. Pengembang dapat memilih faktor yang signifikan misalnya ”lokasi” yang terdapat dalam “atribut produk”. Grup A menerima hipotesis null, artinya bahwa enam faktor dalam strategi positioning mempunyai peran yang sama dalam pemasaran realestat. Ada perbedaan positioning pasar antara grup A dan grup B. Hasil penelitian juga menyarankan agar pengembang yang akan memilih faktor-faktor dalam strategi positioning untuk memperhatikan kekuatan eksternal dan mengutamakan pada “pendapatan konsumen” dan “lokasi”.

Design Aspect of including Infill Wall in RC Frame Design* Sukrawa, M.
Civil Engineering Dimension Vol. 16 No. 1 (2014): MARCH 2014
Publisher : Institute of Research and Community Outreach - Petra Christian University

This study compares analysis and design of a four story reinforced concrete (RC) frame structure with infill wall at upper levels and open at basement level. For the analysis, the RC frame are modeled as open frame (MOF) and infilled-frames using six compression only cross diagonal strut (MIF-Strut), and infilled frame using shell elements (MIF-Shell). Another model, MIF-Full, is created by adding walls at basement level of the MIF-Strut to study the effect of wall discontinuity. All three dimensional models are loaded with gravity load and quake load appropriate for South Bali region. Results show that the infilled-frame models are 4.8 times stiffer than MOF in the wall direction. Perpendicular to the wall, however, the stiffness increase is 29%. Soft storey mechanism exists in the absence of wall at basement level, regardless of reasonable column dimensions.

Spline Nonparametric Regression Analysis of Stress-Strain Curve of Confined Concrete Tavio Tavio; I Nyoman Budiantara; Benny Kusuma
Civil Engineering Dimension Vol. 10 No. 1 (2008): MARCH 2008
Publisher : Institute of Research and Community Outreach - Petra Christian University

Due to enormous uncertainties in confinement models associated with the maximum compressive strength and ductility of concrete confined by rectilinear ties, the implementation of spline nonparametric regression analysis is proposed herein as an alternative approach. The statistical evaluation is carried out based on 128 large-scale column specimens of either normal-or high-strength concrete tested under uniaxial compression. The main advantage of this kind of analysis is that it can be applied when the trend of relation between predictor and response variables are not obvious. The error in the analysis can, therefore, be minimized so that it does not depend on the assumption of a particular shape of the curve. This provides higher flexibility in the application. The results of the statistical analysis indicates that the stress-strain curves of confined concrete obtained from the spline nonparametric regression analysis proves to be in good agreement with the experimental curves available in literatures

PRE DAN POST PROCESSOR UNTUK PROGRAM KOMPUTER RUAUMOKO Takim Andriono; Benjamin Lumantarna
Civil Engineering Dimension Vol. 2 No. 2 (2000): SEPTEMBER 2000
Publisher : Institute of Research and Community Outreach - Petra Christian University

This paper introduces RUAUIN and RUAUPLOT as pre and post processors for Ruaumoko: a computer program which can be used as a tool to investigate the seismic behaviour of building structures by conducting inelastic time history analyses. The interactive menu of RUAUIN should ease data entry, while the interactive menu and graphics output of RUAUPLOT should help the user in interpreting Ruaumoko's output. These programs are written in C language, and can be run under DOS or Windows® environment.. Abstract in Bahasa Indonesia : Makalah ini mengenalkan RUAUIN dan RUAUPLOT yang merupakan pre dan post processor untuk Ruaumoko: sebuah program komputer yang dapat dipakai sebagai alat bantu untuk memeriksa perilaku seismik struktur bangunan dengan analisa inelastis riwayat waktu. RUAUIN dengan menu-menu yang interaktif diharapkan dapat memudahkan pengisian data sedangkan RUAUPLOT dengan menu-menu interaktif serta tampilan grafis dapat memudahkan analisa keluaran Ruaumoko. Program ini ditulis dalam bahasa C, dan dapat dijalankan dalam mode DOS maupun Windows®.

The Characteristics of Asphalt Concrete Binder Course (AC-BC) Mixture with Bottom Ash as Aggregate Substitute Gito Sugiyanto; A. Harmawan; B. Mulyono
Civil Engineering Dimension Vol. 17 No. 1 (2015): MARCH 2015
Publisher : Institute of Research and Community Outreach - Petra Christian University

Highways serve nearly 80-90% of the population mobility and flow of goods. Utilization of bottom ash, a waste from coal combustion, in highway construction is one of the alternatives to reduce environmental pollution and support Clean Development Mechanism Program of Kyoto Protocol. The aim of this study is to analyze the characteristics of AC-BC mixture that uses bottom ash as partial substitute of fine aggregate and comparing with a standard mixture. Laboratory tests are performed on two different types of mixtures. The tests show that optimum asphalt content for AC-BCStandard mixture is 5.20% while AC-BCBottom Ash mixture is 5.25%. Bottom ash has higher porosity along with a little break field and has round shape so that the asphalt absorption is bigger than the crushed stone. Bottom ash can be used as an alternative aggregate to increase the value of flow of the AC-BC mixture, thus converting waste to valuable material.

Kriging-Based Finite Element Method: Element-By-Element Kriging Interpolation F. T. Wong; W. Kanok-Nukulchai
Civil Engineering Dimension Vol. 11 No. 1 (2009): MARCH 2009
Publisher : Institute of Research and Community Outreach - Petra Christian University

An enhancement of the finite element method with Kriging shape functions (K-FEM) was recently proposed. In this method, the field variables of a boundary value problem are approximated using ‘element-by-element’ piecewise Kriging interpolation (el-KI). For each element, the interpolation function is constructed from a set of nodes within a prescribed domain of influence comprising the element and its several layers of neighbouring elements. This paper presents a numerical study on the accuracy and convergence of the el-KI in function fitting problems. Several examples of functions in two-dimensional space are employed in this study. The results show that very accurate function fittings and excellent convergence can be attained by the el-KI.

PEMODELAN PONDASI DANGKAL DENGAN MENGGUNAKAN TIGA LAPIS GEOTEKSTIL DI ATAS TANAH LIAT LUNAK Subianto Tjandrawibawa; Harry Patmadjaja
Civil Engineering Dimension Vol. 4 No. 1 (2002): MARCH 2002
Publisher : Institute of Research and Community Outreach - Petra Christian University

It was common practice to apply a layer of ''sirtu'' (sandy gravel) beneath the shallow foundations of buildings on soft subsoil. Though the bearing capacity is increased, it is usually limited to anticipate future consolidation settlements which might be detrimental. This could be overcome by reinforcing the ''sirtu'' layer with geotextiles. To study the effect of geotextile reinforcement, a laboratory foundation model was constructed on a soft soil deposit. The model measured 5x5x2cm³. The bearing capacity of this model was compared with the bearing capacity of the model on ''sirtu'' layer, and geotextile reinforced ''sirtu''. Geotextile reinforcement was laid in one, two and three layers. Based on the bearing capacity tests, it is concluded that with one geotextile layer the strength was increased 182,6% higher than soft soil, with two geotextile layers the strength increased 197,8% higher than soft soil and with three geotextile layer the strength increased 241,3% higher than soft soil. Abstract in Bahasa Indonesia : Bangunan di atas tanah yang lunak sering menggunakan lapisan sirtu di bawah pondasi dangkalnya. Cara ini dapat meningkatkan daya dukung pondasi namun daya dukung ini masih harus dibatasi untuk menghindari kemungkinan penurunan jangka panjang yang merugikan. Penurunan lapisan sirtu sendiri dapat ditanggulangi dengan memasang perkuatan berupa lapisanlapisan geotekstil di dalamnya. Sebuah model dibuat di laboratorium untuk mempelajari efektifitas lapisan-lapisan geotekstil ini terhadap peningkatan daya dukung. Model pondasi berukuran 5x5x2cm³. Daya dukung model ini, langsung di atas tanah lunak, dibandingkan dengan daya dukung model pondasi yang terletak pada lapisan sirtu dan lapisan sirtu yang diperkuat geotekstil. Lapisan sirtu diperkuat dengan satu, dua sampai tiga lapis geotekstil. Hasil percobaan menunjukkan dengan satu lapis geotekstil kekuatan meningkat sebesar 182,6% dibanding tanah lunak, dengan dua lapis geotekstil kekuatan meningkat 197,8% dibanding tanah lunak dan dengan tiga lapis geotekstil kekuatan meningkat 241,3% dibanding tanah lunak.

Architecture and Structure – Just a Simple Love Affair Manfred Grohmann
Civil Engineering Dimension Vol. 17 No. 3 (2015): SPECIAL EDITION
Publisher : Institute of Research and Community Outreach - Petra Christian University

Behind challenging architecture there is always a challenging structure. To achieve the optimal result in a design process, architecture and structure have to be developed together. Starting from the first planning phases, the cooperation has to be a fruitful dialog involving complex geometry programs and structural calculation tools. The result of such planning processes is exemplified in this paper presenting just 2 projects Bollinger+Grohmann realized together with two different architects, i.e. The Rolex Learning Center for Ecole Polytechnique Federate de Lausanne (EPFL) in Lausanne with SANAA, Tokyo, and the new building for the European Central Bank (ECB) in Frankfurt with COOP Himme (1) blau Vienna. The aim is to prove that there is no contradiction between new architecture and structure, but just a simple love affair.

Application of Buckling Restrained Braces for Seismic Strengthening of Irregular Gravity Load Designed Reinforced Concrete Frame Buildings Chandra J.; Warnitchai P.
Civil Engineering Dimension Vol. 13 No. 2 (2011): SEPTEMBER 2011
Publisher : Institute of Research and Community Outreach - Petra Christian University

Past earthquake disasters have shown that irregular gravity load designed (GLD) reinforced concrete (RC) frame buildings were very vulnerable to strong ground shaking. Many of them collapsed and caused loss of human lives as well as materials. Hence, in order to prevent future disasters, this type of buildings needs to be strengthened against earthquake. This paper presents a case study of an innovative approach for seismic strengthening of a typical six story residential building with a soft/weak first story using buckling restrained braces (BRBs). The seismic performance of the original GLD building and the retrofitted one are compared using three dimensional nonlinear dynamic time history analysis in OpenSees. The analysis results show that the innovative seismic strengthening approach for irregular GLD RC frame buildings using BRBs can significantly reduce maximum story drifts as well as building damages which benefits in reducing the risk of building’s collapse during earthquake.

Creep Properties of Walikukun (Schouthenia ovata) Timber Beams Ali Awaludin; Ngudiyono Ngudiyono; Achmad Basuki
Civil Engineering Dimension Vol. 18 No. 2 (2016): SEPTEMBER 2016
Publisher : Institute of Research and Community Outreach - Petra Christian University

This study presents an evaluation of creep constants of Walikukun (Schoutheniaovata) timber beams when rheological model of four solid elements, which is obtained byassembling Kelvin and Maxwell bodies in parallel configuration, was adopted. Creep behaviorobtained by this method was further discussed and compared with creep behavior developedusing phenomenological model of the previous study. Creep data of previous study was deformationmeasurement of Walikukun beams having cross-section of 15 mm by 20 mm with a clearspan of 550 mm loaded for three weeks period under two different room conditions: with andwithout Air Conditioner. Creep behavior given by both four solid elements model and phenomenological(in this case are power functions) had good agreement during the period of creepmeasurement, but they give different prediction of creep factor beyond this period. The powerfunction of phenomenological model could give a reasonable creep prediction, while for the foursolid elements model a necessary modification is required to adjust its long-term creep behavior.

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