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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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The Tension Strength Experiment of Thread Connection Based on The Depth of Thread Penetration Agus Santosa Sudjono; Lydia F. Tjong; Yohannes Yohannes
Civil Engineering Dimension Vol. 10 No. 1 (2008): MARCH 2008
Publisher : Institute of Research and Community Outreach - Petra Christian University

Thread connection has been used for a long time. Presently, this kind of connection is the main connection in steel construction. This research aims to comprehend further the mechanism of the thread connection with respect to the depth of thread penetration. Tensile strength of thread connection was derived experimentally using two steel rods. The diameter of the first steel rod was Â¾ inch (18.5 mm) and threaded on one end by 16 threads per inch. The diameter of the second steel rod was 45 mm and functioned as nut. From the results of the experiment, it can be concluded that rod failure will happen if the depth of thread penetration is equal to or bigger than 90% of nut minor diameter. Meanwhile, thread failure will happen if the depth of thread penetration is less than 90% of nut minor diameter. It is also shown that the correlation between the number of thread and the maximum load which can be supported by the connection is not linear.

PENELITIAN PENDAHULUAN PENGGUNAAN BENDA UJI KUBUS BETON PADA PERKERASAN LENTUR TYPE CEMENT TREATED BASE CTB Harry Patmadjaja; Suhartono Irawan
Civil Engineering Dimension Vol. 3 No. 1 (2001): MARCH 2001
Publisher : Institute of Research and Community Outreach - Petra Christian University

Cement Treated Base is a structural layer using Portland Cement as a bonding agent.Until now CTB is not commonly used in Indonesia, so the production method does not develop and the testing procedures is not standardized. AASHTO 1986 specifies a testing procedure for CTB using Unconfined Compressive Strength (UCS). The sample used is a cylinder with diameter 7,1 cm and height 14,2 cm, which is not common in Indonesia. In Indonesia a 15x15x15 cm3 cube sample is more common. This paper is a preliminary laboratory research to get the relation between the compressive strength of a 15x15x15 cm3 cube with the UCS of a 7.1 cm diameter and 14.2 cm height cylinder. The result shows that a 0.65 multiplication factor is needed to convert the cube compressive strength to the cylinder UCS. Abstract in Bahasa Indonesia : Cement Treated Base (CTB) adalah salah satu type perkerasan lentur dengan menggunakan semen portland sebagai bahan pengikat. Saat ini CTB belum umum digunakan di Indonesia sehingga teknik pembuatannya belum berkembang dan pengujiannya belum dibakukan. AASHTO 1986 menggunakan cara Unconfined Compressive Strength (UCS) untuk pengujian CTB. Pengujian dilakukan pada benda uji berbentuk silinder dengan diameter 7,1 cm dan tinggi 14,2 cm, yang tidak umum digunakan di Indonesia. Di Indonesia lebih umum digunakan benda uji berbentuk kubus 15x15x15 cm3. Penelitian ini merupakan penelitian pendahuluan di laboratorium untuk mencari hubungan antara kekuatan tekan benda uji bentuk kubus 15x15x15 cm3 dan UCS benda uji silinder diameter 7,1 cm dengan tinggi 14,2 cm. Dari penelitian ini dihasilkan suatu faktor pengali sebesar 0,65 untuk mengubah kuat tekan kubus menjadi UCS silinder.

A Discussion of Obser-View as a Method of Generating Data in the Construction Industry Nnedinma I. Umeokafor
Civil Engineering Dimension Vol. 17 No. 1 (2015): MARCH 2015
Publisher : Institute of Research and Community Outreach - Petra Christian University

This study demonstrates the paradigmatic position of obser-view and argues for the incorporation of reflectivity in obser-view to foster rigorous data generation. Aimed at introducing obser-view to the construction industry as a method of generating data, this study critically examines obser-view, exploring its application to construction research. Obser-view is an emerging data collection technique developed by Kragelund in 2006, where a non-scripted interview immediately post-observation is conducted. This helps to gain a deeper understanding of the phenomenon. Although researchers adopt various strategies to ensure rigor in qualitative research, there are still concerns in relation to validity, reliability, bias and objectivity in qualitative research. However, developing strategies that will help in gaining a deeper understanding of the phenomenon in study and tackling the aforementioned challenges will help in ensuring transparency in qualitative research. A review of literature is presented, the limitations and benefits of obser-view are also presented.

Flood Mitigation of Nyando River Using Duflow Modelling J. Joleha; V. Maino; A. Adyabadam; W. Zhao; S. Ke; T.H. Le
Civil Engineering Dimension Vol. 11 No. 1 (2009): MARCH 2009
Publisher : Institute of Research and Community Outreach - Petra Christian University

Duflow surface water hydrodynamic model has been applied using a case study from Nyando catchment in the western part of Kenya in Africa to simulate various extreme flood behaviours and their retardation levels by using selected structural measures as flood mitigation techniques. The objective of this case study was to establish a design flood recommendable for mitigation, and to identify the most cost effective flood mitigation structure. Various design flows are simulated against the different proposed structures hence, the optimal structure can be recommended when economical, social and environmental constraints are considered in the decision making process. The proposed four flood mitigation structures flood plain extension, embankment (dykes), channel by-pass, and green-storage were simulated for 20-year recurrence interval flood to determine their individual responses in storing excess water. The result shows that building a green-storage is the best and optimal structure for flood mitigation.

VOICE OF CUSTOMER TENTANG STUDENT CENTER UNIVERSITAS KRISTEN PETRA Connie Susilawati
Civil Engineering Dimension Vol. 4 No. 1 (2002): MARCH 2002
Publisher : Institute of Research and Community Outreach - Petra Christian University

Petra Christian University plans to build a Student Center, which functions as a place for students to gather in an informal meeting, a place for student activities, and a place with social and cultural facilities for students, but still fit with the purpose of the university. To prepare a more suitable plan for the students as the main users, their voices should be considered. A survey to 1087 students has been done to gather their voices. This study evaluates level of need and level of importance of the room that will be provided in the Student Centre. The level of satisfaction of the existing facilities’ size has been evaluated to the student guild. This study has recommended rooms under seven categories which have to be provided, such as: rooms for student union, academic support, administration, social, religious rooms, commercial room and some complementary rooms Abstract in Bahasa Indonesia : Universitas Kristen Petra merencanakan untuk mendirikan Student Center yang merupakan tempat berkumpulnya mahasiswa dan sivitas akademika dalam pertemuan informal, tempat aktivitas mahasiswa dan tempat yang menyediakan fasilitas rekreasi, sosial, dan kultural sesuai dengan dasar dan tujuan universitas. Agar perencanaanya lebih sesuai dengan kebutuhan pengguna utamanya, yaitu mahasiswa, maka pendapat mereka perlu menjadi bahan pertimbangan. Untuk mengetahui pendapat mahasiswa telah dilakukan survey kepada 1087 responden mahasiswa aktifis dan non aktifis. Studi ini menilai tingkat kebutuhan dan tingkat kepentingan dari ruangan yang akan disediakan di dalam Student Center tersebut. Mengingat sebagian ruangan-ruangan tersebut sudah ada, maka dilakukan juga evaluasi kepuasan pengguna ruangan terhadap luas ruangan yang diwakili oleh aktivis mahasiswa. Hasil akhir dari penelitian ini adalah rekomendasi ruangan yang perlu disediakan dapat dikategorikan sebagai ruangan untuk organisasi mahasiswa, ruang penunjang akademik, ruang spriritual, ruang administrasi, ruang sosial dan dilengkapi dengan beberapa ruang komersial serta ruang pelengkap.

The Importance of Hydraulic Structures for Society: Quay Walls and Dikes in the Netherlands Jarit de Gijt
Civil Engineering Dimension Vol. 17 No. 3 (2015): SPECIAL EDITION
Publisher : Institute of Research and Community Outreach - Petra Christian University

Since mankind exists, men have undertaken engineering activities to make their life more pleasant and secure. However this has not been an easy task, especially in the past. The knowledge of mathematics and physics to describe engineering problems became available only since 1400-1500. Nevertheless, great achievements have been made by man before that time, e.g. the pyramids in Egypt, the first sluice in China, the Borobudur temple in Indonesia, and the design and building activities of the Inca’s in South America. To illustrate this development, also the world economy, world ecology will be shortly mentioned. The structures that are briefly discussed in this paper are: soil and concrete dams for generating electricity, reservoirs for irrigation and drinking water, dikes, sluices, inland and sea, tunnels, and quay walls. This paper presents an overview of hydraulic structures in general with the emphasis on quay walls and dikes in the Netherlands. Examples of these structures will be discussed illustrating present state of the art and also with a view to the future. Conclusions and recommendations are given to enhance the knowledge of hydraulic structures.

Model Development of Rainwater Management for Agriculture Decision Support System in Semi Arid Area Susilawati C.L.; Tunggul S.
Civil Engineering Dimension Vol. 13 No. 2 (2011): SEPTEMBER 2011
Publisher : Institute of Research and Community Outreach - Petra Christian University

Land cultivation for agricultural purposes in semiarid area is usually carried out only once a year specifically during the rainy season. The condition is even worse since it is not without the risk of failure because of dry-spell or water-logging. To cope with this situation, the researchers developed a model of Rainwater Management for Agriculture Decision Supporting System (RMA-DSS). The objective of this RMA-DSS is to facilitate the decision making to build water infrastructure. Using this program it is hoped that sufficient water supply for specific crops with correct planting time can be guaranteed, which in turn will optimize harvest. The model consists of three parts, namely, rainfall-runoff-infiltration model, crop water requirement-irrigation-drainage model and rainwater management for agriculture model. The Models are designed using Microsoft Excel’s Macro Visual Basic and finalized with Visual Basic language program for operating spatial database of map object and non spatial database.

PENGARUH RANGKAK CREEP PADA BANGUNAN TINGGI Benjamin Lumantarna; Steven Steven; David Budiono
Civil Engineering Dimension Vol. 5 No. 1 (2003): MARCH 2003
Publisher : Institute of Research and Community Outreach - Petra Christian University

Inelastic deformation due to creep can cause dramatic change of end moment of beams. In this study the influence of creep to end moments is compared with the ones calculated using direct and sequential load methods. An approximate method using Equivalent Modulus of Elasticity is proposed. Four shear wall frame buildings, 10, 20, 30, and 40 stories with 30 cm shear wall are subjected to 5, 10, 15, and 20 years creep. It is shown that the difference between the 5, 10, 15, and 20 years creep are not significant. Compared to the sequential method, the direct method gives a better result to the creep. It is also shown that except for the 10 story building, the end moments caused by the development of creep deformation can cause cracks, thus the ability of the beams to redistribute the end moment must be assured. Abstract in Bahasa Indonesia : Perubahan bentuk inelastis yang disebabkan oleh rangkak (creep) dapat menyebabkan perubahan momen pada tumpuan balok. Penelitian ini mempelajari pengaruh rangkak dan membandingkan hasil perhitungan yang diperoleh terhadap metode pembebanan langsung dan pembebanan sequential. Untuk memperhitungkan pengaruh rangkak, diusulkan suatu metode penyederhanaan di mana digunakan konsep Modulus Elastisitas Ekivalen. Dalam penelitian ini ditinjau 4 buah bangunan, yaitu bangunan 10, 20, 30 dan 40 lantai dengan dinding geser tebal 30 cm., pengaruh rangkak diperhatikan pada saat bangunan berumur 5, 10, 15, dan 20 tahun. Hasil penelitian menunjukkan bahwa tidak ada perbedaan yang berarti antara rangkak 5, 10, 15, dan 20 tahun. Dibandingkan dengan metode sequential, metode pembebanan langsung lebih mendekati hasil yang diberikan perhitungan dengan memasukkan pengaruh rangkak. Juga ditunjukkan bahwa selain pada bangunan 10 lantai, akibat rangkak akan terjadi retak pada beberapa tumpuan, sehingga dalam perencanaan harus dimungkinkan terjadinya redistribusi momen dari tumpuan ke lapangan.

Proposed Design Graphs of Geotextile Reinforcement on Soft Clay under Various Field Conditions Putu Tantri K. Sari; Yudhi Lastiasih; Sugiarto Sugiarto
Civil Engineering Dimension Vol. 18 No. 2 (2016): SEPTEMBER 2016
Publisher : Institute of Research and Community Outreach - Petra Christian University

This paper describes the behavior of reinforced embankments constructed on soft clay subgrade with varying compressible depths, embankment slopes and embankment heights. The stability of the embankment is evaluated using the Bishop method. The resistance moment and the numbers of geotextiles required are examined. It is shown that varying the subgrade and embankment can significantly affect the embankment stability and also the number of reinforcements. It requires a lot of time to design embankment reinforcements, especially when the length of the embankment is tens of kilometers. The main aim of this study is to develop graphs to assist in designing the number of geotextile reinforcements. This paper proposes design graphs to support engineers and designers to determine the required geotextile reinforcements for embankments.

Volume Stability of Bitumen Bound Building Blocks Thanaya I.N.A.
Civil Engineering Dimension Vol. 12 No. 2 (2010): SEPTEMBER 2010
Publisher : Institute of Research and Community Outreach - Petra Christian University

This paper covers results of laboratory investigations on the volume stability of masonry units incorporating waste materials bound with bitumen (Bitublocks), due to moisture adsorption, thermal exposure and vacuum saturation. The materials used were steel slag, crushed glass, coal fly ash, and 50 pen bitumen. The samples were produced in hot mix method, compacted, then exposed to moist and temperature. It was found that moisture adsorption from the environment caused the Bitublock to expand. The samples with less intense curing regime experienced lower expansion and became stable faster, and vice versa. Under thermal condition (at 70°C), the samples with less intense curing regime underwent higher expansion, and vice versa. They were also highly reversible. Their volume stability was found unique under water exposure. The expansion on first vacuum saturation cycle was irreversible, then largely reversible on the following cycles.

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