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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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MODEL KORELASI ANTARA INDEKS KOMPRESI CC DENGAN INDEKS BATAS CAIR LL UNTUK TANAH LEMPUNG DI SURABAYA Tirta Djusman Arief
Civil Engineering Dimension Vol. 4 No. 1 (2002): MARCH 2002
Publisher : Institute of Research and Community Outreach - Petra Christian University

This study tried to propose a correlation model between compression index,Cc, of clay with its liquid limit index, LL. A statistic probabilistic correlation model was used for Surabaya soils. The correlation established in this research gave a compression index, Cc, bigger than the one predicted by Terzaghi and Peck for soft and very soft clay, but smaller for medium and stiff clay. For practical use the correlation model still need further tests. Abstract in Bahasa Indonesia : Studi ini untuk mendapatkan model hubungan antara indeks kompresi, Cc, dengan indeks batas cair, LL. Dalam penelitian ini digunakan model korelasi yang bersifat statistik probabilistik untuk tanah di daerah Surabaya. Hasil penelitian menunjukkan bahwa model korelasi ini memberikan nilai Cc yang lebih besar dari perumusan Terzaghi dan Peck untuk jenis tanah lempung sangat lunak dan lunak, tetapi lebih kecil untuk tanah lempung sedang dan kaku. Untuk pemakaian praktis, hasil prediksi model korelasi ini perlu dibandingkan dengan pengujian lanjutan.

Structural Behaviour and Design of Geopolymer Concrete Members Prabir Kumar Sarker
Civil Engineering Dimension Vol. 17 No. 3 (2015): SPECIAL EDITION
Publisher : Institute of Research and Community Outreach - Petra Christian University

The worldwide production of concrete is on the increase in order to meet the increasing rate of construction. Since cement production contributes to the greenhouse gas emission, it is vital to develop alternative low-emission binders to reduce the carbon footprint of concrete. Fly ash based geopolymer is an alternative binder that has potential to reduce the CO2 emission of concrete production. It has been shown in different studies that the mechanical properties of geopolymer concrete are comparable to those of ordinary Portland cement (OPC) concrete. This paper describes the behaviour and design aspects of geopolymer concrete structural members. The design aspects presented in this paper are bond of reinforcing steel in pull-out and spliced bars in beams, beams in shear and flexure, and columns in uniaxial and biaxial bending. It is shown that the current provisions for OPC concrete can be conservatively used for design of reinforced geopolymer concrete members.

The Influence of Rock Properties and Size into Strength Criteria: A Proposed Criterion for Soft Rock Masses Agustawijaya D.S.
Civil Engineering Dimension Vol. 13 No. 2 (2011): SEPTEMBER 2011
Publisher : Institute of Research and Community Outreach - Petra Christian University

A new modified strength criterion for soft rock masses is proposed in this paper in order to provide a suitable estimation for soft rock mass strength. The new criterion is based upon the current compression test data of soft materials of over 150 samples, and available published data of soft rock strength. It is shown that the proposed criterion estimates reasonable values of soft rock mass strength. Rock properties and size contribute significantly into the strength, represented by friction angle and unconfined compressive strength. Examples exercised reveal that the structure of soft rock masses takes a dominant part in controlling the strength, which then determines the modelled strength of soft rock masses. The results also show that the strength of the proposed equation could relatively be higher three times than the strength of the Hoek-Brown criterion for a massive soft rock mass.

DESIGN COORDINATION IN DISTRIBUTED ENVIRONMENTS USING VIRTUAL REALITY SYSTEMS Rusdi HA
Civil Engineering Dimension Vol. 5 No. 1 (2003): MARCH 2003
Publisher : Institute of Research and Community Outreach - Petra Christian University

This paper presents a research project, which investigates the use of virtual reality and computer communication technology to facilitate building design coordination in distributed environments. The emphasis of the system, called VR-based DEsign COordination (VRDECO) is providing a communication tool that can be used by remote designers for settling ideas before they fully engage in concurrent engineering environments. VRDECO provides the necessary design tools, library of building elements and communication procedures, for designers from remote places to perform and coordinate their initial tasks. It has been implemented using available commercial software packages, and is used in designing a simple house. VRDECO facilitates the creation a preliminary design and simple communication with the client. There are, however, some difficulties in the development of the full version of VRDECO, i.e.: creating an adequate number of building elements, building specification database with a sufficient number of choices, and establishing a systematic rule to determine the parts of a building that are updateable.

Reinforced Concrete Finite Element Modeling based on the Discrete Crack Approach Sri Tudjono; Han Ay Lie; Sholihin As’ad
Civil Engineering Dimension Vol. 18 No. 2 (2016): SEPTEMBER 2016
Publisher : Institute of Research and Community Outreach - Petra Christian University

The behavior of reinforced concrete elements is complex due to the nature of the concrete that is weak in tension. Among these complex issues are the initial cracking and crack propagation of concrete, and the bond-slip phenomenon between the concrete and reinforcing steel. Laboratory tested specimens are not only costly, but are limited in number. Therefore a finite element analysis is favored in combination to experimental data. The finite element technique involving the cracks inserting is one of the approaches to study the behavior of reinforced concrete structures through numerical simulation. In finite element modeling, the cracks can be represented by either smeared or discrete crack. The discrete crack method has its potential to include strain discontinuity within the structure. A finite element model (FEM) including the concrete cracking and the bond-slip was developed to simulate the nonlinear response of reinforced concrete structures.

PENGENDALIAN PELAKSANAAN KONSTRUKSI BERDASARKAN KONSEP NILAI HASIL PADA PEMBANGUNAN PABRIK X DI GRESIK Herry Pintardi Chandra
Civil Engineering Dimension Vol. 5 No. 2 (2003): SEPTEMBER 2003
Publisher : Institute of Research and Community Outreach - Petra Christian University

Abstract in Bahasa Indonesia : Catatan redaksi%3A%0D%0A%0D%0APengendalian biaya adalah suatu aspek yang sangat penting dalam manajemen proyek. Pengendalian biaya yang kurang baik%2C tidak jarang menyebabkan biaya konstruksi proyek yang berbeda dengan biaya yang direncanakan. Makalah ini menjelaskan suatu studi kasus pengendalian biaya kostruksi dengan menggunakan Konsep Hasil Nilai%2C suatu metode yang mengintegrasikan hubungan antara biaya dan waktu serta memberikan gambaran tentang kondisi kelangsungan proyek.

Effects of Live Load on Seismic Response of Bridges: A Preliminary Study Wibowo, H.; Sanford, D.M.; Buckle, I.G.; Sanders, D.H.
Civil Engineering Dimension Vol. 14 No. 3 (2012): Special Edition
Publisher : Institute of Research and Community Outreach - Petra Christian University

Although live load is well known to have a dynamic effect on bridge response in addition to its self-weight, the significance of these effects on seismic response is unclear. In addition, most bridge design specifications have few requirements concerning the inclusion of live load in their seismic design provisions. The main objective of this study is therefore to investigate and obtain insight into the effect of vehicle-bridge interaction during earthquake shaking. The study consists of both experimental and analytical investigations. This paper focuses on the experimental work, which includes shake table testing of a 2/5-scale model of a horizontally curved steel girder bridge loaded with a series of representative vehicles. Preliminary experimental results show that the presence of the live load had a clear beneficial effect on performance for small amplitude motions, but that this improvement diminished with increasing amplitude of shaking. Parameters used to measure performance include column displacements, abutment shear forces, abutment uplift, and concrete spalling.

MARKETING EXPENDITURES IN THE INDONESIAN CONSTRUCTION INDUSTRY Krishna Mochtar
Civil Engineering Dimension Vol. 6 No. 2 (2004): SEPTEMBER 2004
Publisher : Institute of Research and Community Outreach - Petra Christian University

In the 1960s, a ânewâ marketing concept known as "four Ps marketing mix" appeared and shifted the focus from the product to the customer. The objective of the new concept was not only profit, and the means of achieving the objective expanded to include the entire âmarketing mixâ: product, price, promotion, and place (channels and distribution). Expenditures of marketing in a company should be explored from these mixes, because each mix would have an impact on the total marketing expenditures. These four mixes are the main aspects of marketing and thus, should represent almost all expenditures in marketing in a company. From this research it is discovered that the responding contractors have only average efforts to improve or innovate their service, mostly using the latest construction methods and management approach. Correlated to their policy in the fourth mix (Place), they are still national oriented and not international oriented in marketing their services, this may lead to the big question of their survival; their motivation to innovate is only average while their target market is only national market. Their attitude to use more intensive âfeesâ policy rather than both product innovation and promotion is also interesting. Big percentage of the responding contractors assumes these âfeesâ are regular marketing practices. This attitude may better be stopped to make the construction industry practices healthier. Attitude to use more product innovation and true promotion approach in marketing in construction must be encouraged systematically in the future, to improve competitiveness in the long term.

Wave Trajectory Study on the Coast of Lhoknga, Aceh Besar, Indonesia: A Numerical Model Approach Ichsan Setiawan; Mohammad Irham
Civil Engineering Dimension Vol. 20 No. 1 (2018): MARCH 2018
Publisher : Institute of Research and Community Outreach - Petra Christian University

A numerical model of wave trajectory using shoaling and refraction formula was proposed in the coastal waters of Lhoknga, Aceh Besar, Indonesia. The developed model used a two dimensional (2D) numerical methods for wave trajectory with the input of wave height and period; 0.62 m and 8 second for high tide and 0.47 m and 6 second for low tide. This model was tested on site during low tide and high tide conditions for verification. The purpose of this numerical study is to trace the distribution of wave trajectory because of shoaling, wave breaking, and wave refraction. The model determines the wave height and crest pattern of the ray wave trajectory. The simulation result shows the pattern of the wave propagation at Lhoknga beach moves from the northwest to the east and south of the coast. The model also informs that the maximum wave height during high tide condition is 1.72 m and 1.31 m during low tide condition. The result indicates that the coast of Lhoknga has moderate wave conditions caused by a gentle beach bathymetry slope.

A Finite Element Analysis of Bearing Resistance of Timber Loaded through a Steel Plate Awaludin A.; Hirai T.; Hayashikawa T.; Leijten A.J.M.
Civil Engineering Dimension Vol. 14 No. 1 (2012): MARCH 2012
Publisher : Institute of Research and Community Outreach - Petra Christian University

Decrease projected length of bolts due to bending deformation in timber joints compresses the steel washers onto timber member and increases lateral resistance of the joints. As this lateral strength increase primarily depend on bearing characteristics of timber beneath the steel washers, a finite element analysis was performed to predict their bearing-embedment behavior. A 3-D finite element model consisting of 8-node solid and contact pair elements was developed using ANSYS assuming an anisotropic plasticity model for timber and an elastic-perfectly plastic model for the washers. Material constants for both steel washer and timber member were obtained from previous test data. The results of the analysis were in good agreement with the experimental load-embedment curves as well as the analytical curves obtained in a previous study based on a rigid-body-spring-model. The same approach was also used to evaluate the effective bearing length (under uniform compression) of a 50 mm depth timber block partially compressed.

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