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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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Performance Evaluation of Hot Mixture Asphalt Using Concentrated Rubber Latex, Rubber Compound and Synthetic Polymer as Modifier Nyoman Suaryana; Tedi Santo Sofyan
Civil Engineering Dimension Vol. 21 No. 1 (2019): MARCH 2019
Publisher : Institute of Research and Community Outreach - Petra Christian University

Research on the utilization of natural rubber for Hot Mixture Asphalt as modifier has been widely carried out, and more intensively since 2016 due to the declining global natural rubber price. Further research conducted is the utilization of pre-vulcanized concentrated rubber latex and rubber compound added with antioxidants and treated through vulcanization process. This study experimentally evaluates the performance of Asphalt Concrete Wearing Course (ACWC) using natural rubber and synthetic polymer as modifier, compared to ACWC without modifier (only petroleum asphalt). The results show that the rubberized asphalt has higher index penetration value as well as higher elasticity compared to petroleum asphalt penetration grade 60, but lower than synthetic polymer modified asphalt. Similarly, the level of performance of rubberized asphalt mixtures, particularly resilient modulus, water resistance, deformation, and fatigue cracking, is between that of petroleum asphalt and synthetic polymer modified asphalt

Optimization of resource leveling problem under multiple objective criteria using a symbiotic organisms search Doddy Prayogo; Christianto Tirta Kusuma
Civil Engineering Dimension Vol. 21 No. 1 (2019): MARCH 2019
Publisher : Institute of Research and Community Outreach - Petra Christian University

Bad scheduling and resource management can cause delays or cost overruns. Optimization in solving resource leveling is necessary to avoid those problems. Several objective criteria are used to solve resource leveling. Each of them has the same objective, which is to reduce the fluctuation of resource demand of the project. This study compares the performance of particle swarm optimization (PSO) and symbiotic organisms search (SOS) in solving resource leveling problems using separate objective functions in order to find which one produces a better solution. The results show that SOS produced a better solution than PSO, and one objective function is better in solving resource leveling than the others.

Characteristics of PVC Coated Welded Wire Mesh Fiber Reinforced Concrete Indradi Wijatmiko; Ari Wibowo; Christin Remayanti Nainggolan
Civil Engineering Dimension Vol. 21 No. 1 (2019): MARCH 2019
Publisher : Institute of Research and Community Outreach - Petra Christian University

Introducing fibers into concrete aims to improve the low tensile strength of concrete and its brittle properties. In this research, readily available PVC coated welded wire mesh with diameter of 1 mm was used as fibers in concrete. There are several variations of concrete samples prepared for this study, i.e. based on the fiber’s volume fraction, length and interlocking schemes. Concrete samples were subjected to tensile and compressive strength, and elastic modulus tests. The results show that the incorporation of PVC coated welded wire mesh slightly increases the tensile strength of concrete, with the optimum fiber volume fraction of 1.5%; with the fiber length of 3.6 cm, and with the interlocking of 1.2 cm. However, the concrete compressive strength is slightly reduced, compared to the normal ones. The presence of PVC coated welded wire mesh as fiber also tends to reduce the elastic modulus of fiber reinforced concrete.

The Development of An Analytical Overlay Design Procedure Djunaedi Kosasih
Civil Engineering Dimension Vol. 10 No. 1 (2008): MARCH 2008
Publisher : Institute of Research and Community Outreach - Petra Christian University

Pavement structural evaluation using pavement modulus values resulting from back calculation process on non-destructive deflection data has been adopted to quantify objectively the conditions of existing pavements under various traffic loading and environmental conditions. However, such an advanced technique is not yet followed widely by advances in analytical overlay design procedures. One possible reason is perhaps due to its requirement to perform complex computations. A new module of computer program BackCalc has been developed to do that task based on the allowable maximum deflection criterion specified by the Asphalt Instituteâ83. The rationale is that adequate overlay thickness will be computed by iteration to result in theoretical maximum deflection that closely matches against the specified allowable maximum deflection. This paper outlines the major components of the program module illustrated by using a practical example. The overlay thickness obtained was found to be comparable with that of the known AASHTOâ93 method

An Investigation of the Performance of Due Process Mechanism in the Execution of Construction Projects in Nigeria Ayangade J. A.; Wahab A.B.; Alake O.
Civil Engineering Dimension Vol. 11 No. 1 (2009): MARCH 2009
Publisher : Institute of Research and Community Outreach - Petra Christian University

Various procurement methods are in use in the award of public contract in Nigeria. The traditional method, which is widely used, has been criticized for its non-performance in projects execution and delivery. To avoid the adverse effects of the current contract procurement methods, Due Process mechanism was introduced. This study, therefore investigated the level of importance of due process by parties involved in the award of public contracts, the performance of Due Process and factors that may affect its functions. The survey was carried out by administering structured questionnaires and interviews on the practitioners in the construction industry that were in the private and public sectors. The data collected were analysed with the use of both descriptive and inferential statistics. The study showed that Due Process has become a new initiative being widely embraced by parties in public contract and has helped in saving public fund by corrupt practices that usually characterize award of contracts. The study also showed that the absence of legal and other institutional frameworks were among the factors that affect the performance of due process in the country.

PENGARUH ARAH SAYAP PELIMPAH SAMPING DAN KEDALAMAN ALIRAN TERHADAP KOEFISIEN DEBIT Indratmo Soekarno
Civil Engineering Dimension Vol. 8 No. 1 (2006): MARCH 2006
Publisher : Institute of Research and Community Outreach - Petra Christian University

Side weir is a type of protection structure which function is to protect channels from damage caused by excessive amount of water (overtopping) so the water level in channels or rivers is to be preserved. The type is spatially varied flow with decrease of discharge occurs in main channels along the side weir. Usually design of spillway applies entrance of slope 900. Thus this reduces discharge coefficient. In this research, the influence entrance slope less than 900 was observed such as 600 and 300. The observation showed that discharge coefficient is function of entrance slope and ratio value of water depth to weir radius (h/r) with largest discharge coefficient around value (0.341 â 0.366) with entrance slope value (55.850 â 57.730). Abstract in Bahasa Indonesia : Pelimpah Samping (side weir) adalah bangunan untuk melindungi saluran dari kerusakan yang diakibatkan oleh jumlah air yang berlebihan (overtopping). Dengan dipasang pelimpah samping maka ketinggian air di saluran atau sungai tetap terjaga. Tipe aliran adalah aliran berubah lambat laun terhadap ruang (spatially varied flow) dengan penurunan debit yang terjadi di saluran utama sepanjang pelimpah. Selama ini pembangunan pelimpah samping menggunakan sudut masuk 900 terhadap aliran utama. Dengan demikian mempunyai kerugian yakni berkurangnya koefisien pengaliran. Dilain pihak asumsi koefisien pengaliran tersebut sampai sekarang tetap dianggap cukup besar. Pada penelitian ini diamati pengaruh sudut masuk sayap yang lebih kecil dari 900 yaitu sudut 600 dan 300. Hasil penelitian menunjukkan bahwa koefisien debit merupakan fungsi dari sudut masuk dan nilai perbandingan kedalaman air dan jari-jari pelimpah (h/r). Koefisien debit terbesar bernilai antara (0,341 â 0,366) pada sudut masuk antara (55,850- 57,730).

ANALISA WHAT IF SEBAGAI METODE ANTISIPASI KETERLAMBATAN DURASI PROYEK Ratna S Alifen
Civil Engineering Dimension Vol. 1 No. 2 (1999): SEPTEMBER 1999
Publisher : Institute of Research and Community Outreach - Petra Christian University

A project network is composed of various activities interrelated in a sequencial relationship. If delay occurs on one activity, it will eventually cause the project overall duration to delay. To anticipate the project delays one could accelarate the succeeding activity in the network. Critical Path Method (CPM) is a management tool which is widely used in the construction project. In this study “what if” analysis is used to anticipate project delays by accelarating the activities on CPM schedule. The accelaration actions are treated in accordance with additional working hours and man-power in the succeeding activities Abstract in Bahasa Indonesia : Jaringan kerja proyek terdiri dari berbagai jenis aktivitas yang saling berkaitan antara satu dengan yang lain. Bila terjadi keterlambatan pada salah satu jenis aktivitas, sering kali akan menyebabkan keterlambatan durasi proyek secara keseluruhan. Salah satu usaha untuk mengantisipasi keterlambatan durasi proyek adalah dengan melakukan percepatan durasi aktivitas pengikut. Metode Jalur Kritis atau Critical Path Method (CPM) merupakan suatu metode penjadwalan proyek yang sudah dikenal dan sering digunakan sebagai sarana manajemen dalam pelaksanaan proyek. Sebuah studi telah dilakukan untuk mengatasi masalah percepatan durasi aktivitas sebagai langkah antisipasi keterlambatan proyek, dengan analisa “what if” yang diterapkan pada jadwal CPM. Percepatan durasi dilakukan pada aktivitas-aktivitas pengikut dengan menambah jumlah jam kerja dan jumlah pekerja pada aktivitas percepatan

APLIKASI VISUAL UNTUK PROGRAM ELEMEN HINGGA DENGAN ELEMEN SEGITIGA DAN SEGIEMPAT SUBPARAMETRIK DAN ISOPARAMETRIK Benjamin Lumantarna
Civil Engineering Dimension Vol. 2 No. 2 (2000): SEPTEMBER 2000
Publisher : Institute of Research and Community Outreach - Petra Christian University

This paper presents visual application of a finite element program for plane stress and plane strain problems. The elements used in this program are isoparametric triangular (three nodes) and rectangular (four nodes) and subparametric triangular (six nodes) and rectangular (eight nodes) with isotropic and orthotropic material of constant thickness. Comparison of the output with SAP90 and closed form solution, shows good agreement. The visual application, ease the use of the program considerably especially in data input and element refinement Abstract in Bahasa Indonesia : Makalah ini memaparkan aplikasi visual dari suatu program elemen hingga untuk masalah plane stress dan plane strain. Elemen yang digunakan dalam program ini adalah elemen isoparametrik segitiga (tiga nodes) dan segi empat (empat nodes) dan subparametrik segitiga (enam nodes) dan segiempat (delapan nodes) dengan material elastis isotropik atau orthotropik dengan tebal tetap. Perbandingan hasil perhitungan program dengan program SAP90 dan penyelesaian eksak menunjukkan hasil yang cukup baik. Pemasukan data serta pengecilan ukuran elemen secara interaktif dengan aplikasi visual sangat memudahkan penggunaan program.

On the Derivation of Exact Solutions of a Tapered Cantilever Timoshenko Beam Foek Tjong Wong; Junius Gunawan; Kevin Agusta; Herryanto Herryanto; Levin Sergio Tanaya
Civil Engineering Dimension Vol. 21 No. 2 (2019): SEPTEMBER 2019
Publisher : Institute of Research and Community Outreach - Petra Christian University

A tapered beam is a beam that has a linearly varying cross section. This paper presents an analytical derivation of the solutions to bending of a symmetric tapered cantilever Timoshenko beam subjected to a bending moment and a concentrated force at the free end and a uniformly-distributed load along the beam. The governing differential equations of the Timoshenko beam of a variable cross section are firstly derived from the principle of minimum potential energy. The differential equations are then solved to obtain the exact deflections and rotations along the beam. Formulas for computing the beam deflections and rotations at the free end are presented. Examples of application are given for the cases of a relatively slender beam and a deep beam. The present solutions can be useful for practical applications as well as for evaluating the accuracy of a numerical method.

Boundary Conditions for 2D Boussinesq-type Wave-Current Interaction Equations Mera M.
Civil Engineering Dimension Vol. 13 No. 1 (2011): MARCH 2011
Publisher : Institute of Research and Community Outreach - Petra Christian University

This research focuses on the development of a set of two-dimensional boundary conditions for specific governing equations. The governing equations are existing Boussinesqtype equations which is capable of simulating wave-current interaction. The present boundary conditions consist of for waves only case and for currents only case. To simulate wave-current interaction, the two kinds of the present boundary conditions are then combined. A numerical model based on both the existing governing equations and the present boundary conditions is applied to simulation of currents only and of wave-current interaction propagating over a basin with a submerged shoal. The results of the numerical model show that the present boundary conditions go well with the existing Boussinesq-type wave-current interaction equations.

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