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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 453 Documents

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Study on Shear Behavior of Concrete-polymer Cement Mortar at Elevated Temperature Khuram Rashid; Tamon Ueda; Dawei Zhang
Civil Engineering Dimension Vol. 18 No. 2 (2016): SEPTEMBER 2016
Publisher : Institute of Research and Community Outreach - Petra Christian University

In this experimental and analytical work, interfacial shear strengths were evaluated at material and member level. Bi-surface shear strength was performed at material level and three-point bending test was conducted at member level. Beams were strengthened by adding steel reinforcement at soffit level and covered by spraying polymer cement mortar (PCM). After curing, strengthened RC beams were exposed to 60 ℃ for 24 hours and tested in three point loading test. Flexural capacity, load deflection relationship and failure modes were observed and compared with the strengthened beams tested at 20 ℃. Reduction in flexural capacity was observed with temperature, failure mode was also shifted from flexural mode to debonding mode of failure at elevated temperature. Ultimate shear load and failure modes were predicted by truss analogy approach. Debonding model was proposed by incorporating bi-surface interfacial shear strength, close agreement were observed between experimental and predicted values.

Flow Fields in front of a Cylindrical Obstacle Yulistiyanto B.
Civil Engineering Dimension Vol. 12 No. 2 (2010): SEPTEMBER 2010
Publisher : Institute of Research and Community Outreach - Petra Christian University

An experimental investigation, conducted in two different flows Reynolds number, was carried out to study the structure of the flow field upstream of a cylindrical obstacle. An Acoustic Doppler Velocity Profiler (ADVP) was used to obtain instantaneously the three directions of the mean velocity. Results of the experiments show the longitudinal velocities, , decrease approaching the cylinder, their distribution becomes more uniform and close to the bed a reverse flow is noticeable with increasing importance. The downward velocity component is clearly shown, continuing with the return flow near the bed, forming a vortex. At positions where the vortex appears upstream from the cylinder, a large increase of the three components of the turbulence intensities is remarked. Approaching the cylinder, one observes the shear stress decreases, having the opposite direction at positions close to the cylinder. A zero value of shear stress should be at the separation point.

EFEK PENGEKANGAN KOLOM BERLUBANG BETON MUTU NORMAL TERHADAP DAKTILITAS KURVATUR Bambang Sabariman; Rachmat Purwono; Priyosulistyo Priyosulistyo
Civil Engineering Dimension Vol. 6 No. 1 (2004): MARCH 2004
Publisher : Institute of Research and Community Outreach - Petra Christian University

Conduit (pipes) in reinforced concrete columns is still used to date. ACI 318M-95 code limits the hole up to maximum 4% of the column cross sectional area. If the percentage is more than 4%, its effect toward its strength should be considered. But the Code does not mention the effect of the hollow cross section on the ductility. This study was done by testing hollow and solid columns with variation as follows: single stirrup ratio = 0.0184, double stirrup ratio = 0.0276, longitudinal steel ratio = 0.0252, concrete compression strength f’c = 26 MPa, column cross-section b = h = 200 mm, column length L = 1100 mm, hole-ratio (0%, 4.53%, 7.07%). Both ends of the column are loaded by constant axial compression load of 0.12f’cAg = 12,5 ton, lateral loads are applied at 1/3 and 2/3 points to produce moments. The observed variables are moment and curvature ductility. The result of the study shows that the 4% hollow column still has the same moment strength as the solid one. This experiment also indicates that its curvature ductility is within the range of 6.14    8.49, thus showing that the columns should be considered as limited ductile structure. If the hole-ratio is more than 4%, however, a decrease in the curvature ductility will be found. Abstract in Bahasa Indonesia : Sampai saat ini masih ditemui pemakaian konduit (pipa-pipa) pada kolom beton bertulang, sehingga penampang kolom menjadi berlubang. Peraturan ACI 318M-95 membatasi besarnya lubang maksimum 4%, apabila persentase lubang  4%, maka besarnya lubang harus diperhitungkan terhadap pengaruh kekuatannya. Peraturan tersebut tidak menyinggung pengaruh lubang terhadap daktilitas kolom berlubang. Penelitian ini dilakukan dengan membuat benda uji kolom berlubang dan tak berlubang dengan variasi: rasio sengkang tunggal = 0,0184; rasio sengkang rangkap = 0,0276; rasio tulangan memanjang = 0,0252; f’c = 26 MPa, penampang kolom = b x h = 200 mm x 200 mm, panjang kolom = L = 1100 mm, rasio lubang (0%; 4,53%; 7,07%), pada kedua ujung kolom diberikan Paksial-tekan konstan 0,12f’cAg = 12,5 ton, diberikan pula beban lateral terletak 1/3 & 2/3 bentang kolom untuk menimbulkan momen. Variabel yang diamati berupa momen dan daktilitas kurvatur. Hasil penelitian tentang kekuatan momen kolom berlubang 4% masih menunjukkan kekuatan yang sama dengan kolom tak berlubang. Eksperimen ini juga mendapatkan daktilitas kurvatur rentang 6,14,8,49 (termasuk daktilitas terbatas). Jika rasio lubang melebihi 4%, maka akan menurunkan daktilitas kurvatur

FACTORS INFLUENCING THE COMPRESSIVE STRENGTH OF FLY ASH-BASED GEOPOLYMER CONCRETE Djwantoro Hardjito; Steenie E Wallah; Dody M.J. Sumajouw; B.V Rangan
Civil Engineering Dimension Vol. 6 No. 2 (2004): SEPTEMBER 2004
Publisher : Institute of Research and Community Outreach - Petra Christian University

This paper describes the effects of several factors on the properties of fly ash based geopolymer concrete, especially the compressive strength. The test variables included were the age of concrete, curing time, curing temperature, quantity of superplasticizer, the rest period prior to curing, and the water content of the mix. The test results show that the compressive strength of geopolymer concrete does not vary with age, and curing the concrete specimens at higher temperature and longer curing period will result in higher compressive strength. Furthermore, the commercially available Naphthalene-based superplasticizer improves the workability of fresh geopolymer concrete. The start of curing of geopolymer concrete at elevated temperatures can be delayed at least up to 60 minutes without significant effect on the compressive strength. The test data also show that the water content in the concrete mix plays an important role.

Ductility of a 60-Story Shearwall Frame-Belt Truss (Virtual Outrigger) Building Pudjisuryadi P.; Lumantarna B.; Tandya H.; Loka I.
Civil Engineering Dimension Vol. 14 No. 1 (2012): MARCH 2012
Publisher : Institute of Research and Community Outreach - Petra Christian University

Researches have been conducted to study Shearwall-frame combined with belt truss as structural system (SFBT), in which the post-elastic behavior and ductility of this structural system are explored. A 60-story SFBT building, with a ductility set equal to 3.75 (value for fully ductile cantilever wall) is considered. The Elastic Response Spectrum used for design is taken from Zone 2 of Indonesian Seismic Map. Capacity design method according to Indonesian Concrete Code is employed. The seismic performance is analyzed using static non-linear push-over analysis and dynamic non-linear time-history analysis. Spectrum consistent ground motions of the May 18, 1940 El-Centro earthquake N-S components scaled to maximum accelerations of various return periods (50, 200, and 500 years) are used for analysis. The results of this study show that plastic hinges mainly developed in beams above the truss, columns below the truss, and bottom levels of the wall. The building shows no indication of structural instability.

PROPOSED PROCEDURE FOR ASSESSMENT OF EXISTING PLATFORMS IN INDONESIA Ricky L. Tawekal
Civil Engineering Dimension Vol. 7 No. 2 (2005): SEPTEMBER 2005
Publisher : Institute of Research and Community Outreach - Petra Christian University

Off-shore platforms were built since the 1970âs in Indonesia, but there is no local code or recommended practice for their design or assessment procedure. The common practice is to use the recommended practice issued by the American Petroleum Institute, API RP2A. The off-shore platforms built in the 1970âs must be re-qualified due to exceedance of the design life. This paper discuss the assessment procedure given in the API RP2A WSD 21th edition, API RP2A LRFD, dan ISO 19902 (draft E â 2001). Problems usually arise due to the fact that the original design was based on API RP2A 10th edition and assessment is done using the new edition which is the 21th edition. Abstract in Bahasa Indonesia : Sejak tahun 1970-an di Indonesia terdapat banyak anjungan lepas pantai, tetapi sampai saat ini belum ada peraturan atau tata cara untuk perencanaan dan penelaahannya. Anjungan lepas pantai biasanya direncanakan berdasarkan Recommended Practice yang diterbitkan oleh American Petroleum Institute, API RP2A. Pada saat ini dirasakan adanya kebutuhan untuk melakukan penelaahan kelayakan struktur anjungan lepas pantai yang telah dibangun sejak tahun 1970-an tersebut. Makalah ini membahas prosedur cara penelaahan anjungan lepas pantai yang diatur dalam API RP2A WSD edisi 21, API RP2A LRFD, dan ISO 19902 (draft E â 2001). Masalah biasanya akan timbul karena perencanaan didasarkan kepada API RP2A edisi 10 sedangkan penelaahan kelayakan didasarkan kepada edisi yang terbaru (edisi 21)

Client and Contractor Organisations’ Assessment of Design-Bid-Build Procurement Practice in Nigeria Dada, M.O.
Civil Engineering Dimension Vol. 15 No. 1 (2013): MARCH 2013
Publisher : Institute of Research and Community Outreach - Petra Christian University

This study sought to investigate the assessment of client and contractor organizations on the use of the design-bid-build method for project delivery in Nigeria. One hundred fifty seven questionnaires were administered purposively on contracting and client organizations in Nigeria. Sixty seven organisations responded to the questionnaire. The responses were analysed through the use of descriptive and inferential statistical tools. Of the twenty issues used for the assessment, ‘individual participants are exploitative of loopholes in contract documents’ ranked first on aggregation for the two groups. ‘Relationships among participants breed mistrust’ ranked least. On the average, contractors and clients disagree with the twenty issues or criticisms about the traditional procurement practice. The results of the analysis further indicate that there are no significant differences in perceptions on the issues between the two groups. It is recommended that the homogeneity of perceptions can be a launching pad for further investigation and intervention efforts for procurement improvement in Nigeria.

THE SWELLING OF EXPANSIVE SUBGRADE AT WATES-PURWOREJO ROADWAY STA. 8 127 Agus Setyo Muntohar
Civil Engineering Dimension Vol. 8 No. 2 (2006): SEPTEMBER 2006
Publisher : Institute of Research and Community Outreach - Petra Christian University

Damage of structures and road beds due to expansive soil are common in Indonesia. One example is the deterioration of a road section at Sta. 8 + 127 of the Purworejo-Wates Highway. This Technical Note presents the investigation of the cause of the deterioration of the road bed. The author concludes that the sub grade is an expansive soil and the swelling pressure is able to lift the overlaying pavement and cause considerable cracking. Abstract in Bahasa Indonesia : Kerusakan struktur bangunan dan perkerasan jalan karena tanah ekspansif merupakan masalah yang banyak terjadi di Indonesia. Salah satu kerusakan perkerasan jalan yang terjadi karena tanah ekspansif adalah kerusakan perkerasan jalan di Sta. 8+127, Jalan Raya Purworejo-Wates. Technical Note ini menyajikan penyelidikan penyebab kerusakan perkerasan jalan tersebut. Penulis menyimpulkan bahwa tanah dasar di lokasi tersebut adalah tanah ekspansif dengan tekanan mengembang yang sanggup merusak struktur perkerasan jalan di atasnya.

MENCARI PENYEBAB KECELAKAAN DI JALAN TOL SURABAYA-GEMPOL DENGAN ANALISA FREKUENSI DAN CROSSTABULATION Harry Patmadjaja
Civil Engineering Dimension Vol. 1 No. 2 (1999): SEPTEMBER 1999
Publisher : Institute of Research and Community Outreach - Petra Christian University

Three hunderd and thirteen data of accident between January 1997 and December 1997 were used to determine causes of accident in Surabaya-Gempol Surabaya-Gempol Tol Road. The evaluations were done using Frequency, and Crosstabulation analysis. Frequency analysis was used to determine the blackspots, whereas Crosstabulation analysis using Pearson chi-square and the contingency coefficient was used to identify corelations between fatality of accident, major cause of accident, variables causing major accident and other variables causing accident.The analysis concluded that fatal accidents were caused by sleepiness. The variables causing the accident were; the driver’s physical condition, close spacing of the vehicles and tyre failures. Fatal, and nonfatal accidents were caused by variables as type of vehicle, vehicle manuever and the age of driver as well as the vehicle.

Analyses of Steel Bridge Circular Columns using Fiber Model considering Local Buckling Kinoshita, K.
Civil Engineering Dimension Vol. 16 No. 1 (2014): MARCH 2014
Publisher : Institute of Research and Community Outreach - Petra Christian University

One of the most concerned problems for analytical estimation of ultimate strength and ductility of steel bridge columns is the consideration of local buckling. Stress-strain curves with softening behavior to include local buckling in fiber model analysis method were proposed by several researchers. However, accuracy of those models is still relatively low. As a consequence, most steel bridge designs have been done using fiber model analysis method without consideration of local buckling. In order to improve the analytical response estimation of steel bridge columns, a fiber model analysis method considering local buckling is proposed in this study. In this method, multi-fiber elements were used to model the local buckling length to simulate local buckling deformation. The proposed method shows good results not only for estimating peak strength but also post-peak strength compared to previous experimental results. However, further research should be directed to improve the accuracy of the deformation modes.

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