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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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KOEFISIEN GESEK TANAH KELEMPUNGAN BERDASARKAN INDEX PLASTISITASNYA Johanes Suwono
Civil Engineering Dimension Vol. 6 No. 1 (2004): MARCH 2004
Publisher : Institute of Research and Community Outreach - Petra Christian University

The plasticity index of clayey soils has been known as a good indicator for many soil parameters. This paper describes how the plasticity index of clays correlates well with the friction coefficient on certain concrete interfaces. Interface direct shear tests were carried out on undisturbed clay samples. The test specimens were normally loaded to simulate the lateral stress at its field condition, and later sheared along a concrete interface. The ratio between the shear stress and the normal stress is termed as the friction coefficient. It appeared that for a certain interface a unique relation between plasticity index and the friction coefficient could be established. Thus, knowing the plasticity index of a clay layer we could determine its adhesion or skin resistance to an embedded pile surface. Abstract in Bahasa Indonesia : Index plastisitas tanah kelempungan mempunyai pengaruh terhadap sifat-sifat tanah tersebut, dan telah dipakai untuk menentukan beberapa parameter tanah. Penelitian dalam tulisan ini berupaya mengetahui pengaruh index plastisitas tanah kelempungan terhadap koefisien geseknya ke permukaan suatu bahan beton. Percobaan dilakukan dalam alat geser langsung (direct shear). Spesimen uji tanah digeserkan ke atas permukaan suatu bahan beton setelah dibebani sesuai dengan tegangan lateral yang pernah diterimanya. Koefisien gesek didefinisikan sebagai rasio antara tegangan geser serta tegangan lateral ini. Ternyata untuk sesuatu macam permukaan bahan didapat hubungan yang cukup unik antara koefisien gesek dengan index plastisitas tanah. Untuk sesuatu lapisan tanah kelempungan dengan index plastisitas tertentu dapat ditentukan besarnya hambatan lekat tanahnya pada permukaan suatu tiang pondasi yang ditahannya.

Combining Off-the-Job Productivity Regression Model with EPA’s NONROAD Model in Estimating CO2 Emissions from Bulldozer Apif M. Hajji; Aisyah Larasati; Michael P. Lewis
Civil Engineering Dimension Vol. 19 No. 2 (2017): SEPTEMBER 2017
Publisher : Institute of Research and Community Outreach - Petra Christian University

Heavy duty diesel (HDD) construction equipment which includes bulldozer is important in infrastructure development. This equipment consumes large amount of diesel fuel and emits high level of carbon dioxide (CO2). The total emissions are dependent upon the fuel use, and the fuel use is dependent upon the productivity of the equipment. This paper proposes a methodology and tool for estimating CO2 emissions from bulldozer based on the productivity rate. The methodology is formulated by using the result of multiple linear regressions (MLR) of CAT’s data for obtaining the productivity model and combined with the EPA’s NONROAD model. The emission factors from NONROAD model were used to quantify the CO2 emissions. To display the function of the model, a case study and sensitivity analysis for a bulldozer’s activity is also presented. MLR results indicate that the productivity model generated from CAT’s data can be used as the basis for quantifying the total CO2 emissions for an earthwork activity.

Safe and Sustainable Tall Buildings - State of the Art Mendis, P.
Civil Engineering Dimension Vol. 14 No. 3 (2012): Special Edition
Publisher : Institute of Research and Community Outreach - Petra Christian University

Tall buildings are becoming very popular around the world. Asia will have most of the tall buildings in this century. Both safety and sustainability aspects are important in planning and designing these buildings. The design and construction of tall buildings present many challenges for the design team, from engineers, architect through to the builder. Although structural systems could be developed and construction solutions could be found to design and construct very tall buildings in excess of 1 km (even 1 mile), other aspects such as fire and egress, long-term movements, environmental wind and perception of motion (including damping for dynamic effects), transportation (lifts) issues, sustainability, durability and maintenance will govern and may even restrict the heights. Current practices and important issues related to design of safe and sustainable design of tall buildings are discussed in this paper.

WALL FORMWORK DESIGN George Ilinoiu
Civil Engineering Dimension Vol. 6 No. 2 (2004): SEPTEMBER 2004
Publisher : Institute of Research and Community Outreach - Petra Christian University

Perencanaan bekisting (Form Work) merupakan bagian penting dalam pelaksanaan struktur beton bertulang, bila tidak direncanakan dengan baik, tidak jarang kegagalan bekisting menyebabkan masalah pelaksanaan yang cukup rumit. Bekisting juga menjadi komponen biaya struktur beton bertulang yang cukup besar. Makalah ini memaparkan perencanaan bekisting, yang di Romania, merupakan bagian persyaratan untuk mendapatkan sertifikasi Insinyur Profesional.

Rainwater Management Model Development for Agriculture in the Savu Island Semi-Arid Region Susilawati C.L.
Civil Engineering Dimension Vol. 14 No. 1 (2012): MARCH 2012
Publisher : Institute of Research and Community Outreach - Petra Christian University

Savu Island is a semiarid region with few rainfalls. The meager annual rainfall of about 1,000-1,500 mm that lasts for three to five months tends to cause draught. To cope with this situation, the Author tries to develop a rainwater management model located in Daieko village. This model constitutes an infrastructure that consists of check dam series which are constructed by simulating a computerized model of decision supporting system called “Rainwater Management for Agriculture Decision Support System (RMA-DSS) model” in the research location of Daieko village. Employing a simulated RMA-DSS model; the locations for check-dam series, and dug-wells can be determined, the size of potential irrigable lands can be determined based on water balance analysis of water samples taken from simulated check dams and inundated lands. Through this model the sufficiency of water supply for agricultural purposes and the land size for cultivation area can be predicted with a high degree of certainty.

Compressive Strength Prediction of Square Concrete Columns Retrofitted with External Steel Collars Pudjisuryadi, P.; Tavio .
Civil Engineering Dimension Vol. 15 No. 1 (2013): MARCH 2013
Publisher : Institute of Research and Community Outreach - Petra Christian University

Transverse confining stress in concrete members, commonly provided by transverse reinforcement, has been recognized to enhance strength and ductility. Nowadays, the confining method has been further developed to external confinement approach. This type of confinement can be used for retrofitting existing concrete columns. Many external confining techniques have been proven to be successful in retrofitting circular columns. However, for square or rectangular columns, providing effective confining stress by external retrofitting method is not a simple task due to high stress concentration at column’s corners. This paper proposes an analytical model to predict the peak strength of square concrete columns confined by external steel collars. Comparison with the experimental results showed that the model can predict the peak strength reasonably well. However, it should be noted that relatively larger amount of steel is needed to achieve comparable column strength enhancement when it is compared with those of conve tional internally-confined columns.

The Uniaxial Compressive Strength of Soft Rock D. S. Agustawijaya
Civil Engineering Dimension Vol. 9 No. 1 (2007): MARCH 2007
Publisher : Institute of Research and Community Outreach - Petra Christian University

Soft rock is a term that usually refers to a rock material with a uniaxial compressive strength (UCS) less than 20 MPa. This low strength range might be influenced by physical characteristics, such as size, saturation, weathering and mineral content. A number of uniaxial compression tests have been conducted onto soft rock samples. The results showed that the strength reduced significantly in saturation. The reduction was also caused by weathering, the strength of distinctly weathered rocks were lower than that of partially weathered rocks. In conjunction with the uniaxial compression test, point load strength index tests, IS(50), have also been conducted in order to obtain a correlation between the UCS and the point load strength index IS(50). The results showed that the IS(50) could well be correlated with the UCS. A conversion factor of 14 is proposed for soft rock materials.

Experimental Investigation of the Effects of Reverse Bending and Straightening Process on Carbon Steel Bars used for Civil Engineering Applications Adewole, K. K.; Bull, S. J.
Civil Engineering Dimension Vol. 16 No. 1 (2014): MARCH 2014
Publisher : Institute of Research and Community Outreach - Petra Christian University

This paper presents an experimental investigation of the effects of reverse bending and straightening process on the mechanical properties of a typical carbon steel bar used for civil engineering applications. Twenty four specimens each were used for the metallogarphy, microhardness and tensile tests. The investigation revealed that the reverse bending and straightening process has no significant effect on the bars’ through-thickness microstructure and hardness. However, the reverse bending and straightening process reduces the yield load, ultimate load, and displacement at fracture of the bars by 4.27%, 2.58%, and 18.62% respectively. These results highlight the need to take into consideration the effects of the previous loading history of the bars/wires, particularly the reduction in the displacement at fracture and consequently, the ductility of the bars/wires in the design and fitness for purpose assessment of components made from them, since the bars/wires could experience high strain during installation and in service due to overloads.

PENINJAUAN FAKTOR-FAKTOR PENENTU RUMAH-TOKO DI SURABAYA DARI SUDUT PANDANG PENGEMBANG DAN PENGGUNA Paulus Nugraha
Civil Engineering Dimension Vol. 2 No. 2 (2000): SEPTEMBER 2000
Publisher : Institute of Research and Community Outreach - Petra Christian University

Before the Indonesian economic crisis at the end of 1997, shophouse was considered as the most attractive investment in Indonesian real estate. But the business abruptly came to a halt after the economic crisis, particularly after the news about riots and lootings in 1998. That is the reason of this research, which analyze factors which influence the shophouse characters, by accommodating the developers and the consumers' view. The developers' view was observed through the characteristics, while the consumers' view was observed through Kotler's "Four-P". The survey was done in Surabaya in April & May 1999. Results show that in general the developers considered their factors as more influencing than the consumers. The most influencing factor from the developers' view is financial, followed by market, location and physical factors. The most influencing factors from the consumers' view are price and product factors. Abstract in Bahasa Indonesia : Sebelum krisis ekonomi melanda Indonesia pada akhir tahun 1997, Ruko (Rumah-Toko) dipandang sebagai investasi yang paling menarik dalam real estat Indonesia. Namun bisnis ini secara drastis berhenti setelah krisis ekonomi, apalagi setelah banyak berita tentang kerusuhan dan penjarahan pada tahun 1998. Dengan alasan tersebut dibuatlah penelitian ini, yang menganalisa faktor-faktor penentu yang mempengaruhi karakter ruko, melihatnya dari sudut pandang pengembang dan pengguna. Sudut pandang pengembang diamati melalui faktor-faktor karakteristiknya, sedangkan sudut pandang pengguna diamati melalui "Empat-P" dari Koetler. Survei dilakukan di Surabaya pada bulan April dan Mei 1999. Hasil memperlihatkan bahwa secara umum pengembang melihat faktor-faktornya lebih menentukan daripada sudut pandang pengguna. Faktor-faktor yang paling menentukan dari sudut pandang pengembang adalah faktor keuangan, yang kemudian diikuti oleh faktor pasar, lokasi, dan fisik. Faktor-faktor yang paling menentukan dari sudut pandang pengguna adalah faktor price dan product.

Characteristics of Bamboo Leaf Ash Blended Cement Paste and Mortar Akaninyene A Umoh; Isaac Abiodun Odesola
Civil Engineering Dimension Vol. 17 No. 1 (2015): MARCH 2015
Publisher : Institute of Research and Community Outreach - Petra Christian University

The use of bamboo leaf ash as cement supplement can contribute to reduction in cost and environmental hazard associated with cement production as well as waste pollution caused by the littered bamboo leaves. Therefore, the characteristics of cement paste and mortar incorporating bamboo leaf ash were investigated. The results of the physical properties of the pastes were within the requirements stipulated by relevant standards while that of the mortar cubes indicated that the compressive strength generally increased with curing age, and that the mix containing 15% Bamboo Leaf Ash (BLA) by mass competes favorably with that of the reference mix at 28days and above. The water absorption and apparent porosity were observed to increase with increase in BLA content, while the bulk density decreases as the percentage of BLA increases from 5% to 25% by mass. The study concluded that 15% BLA replacing cement is adequate for the production of masonry mortar.

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