Nuroji Nuroji
Jurusan Teknik Sipil, Universitas Diponegoro, Kampus UNDIP Tembalang, Jl. Prof. Sudharto, SH Tembalang - Semarang.

Published : 41 Documents
Articles

Studi Eksperimental Lekatan antara Beton dan Tulangan pada Beton Mutu Tinggi Nuroji, Nuroji
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 12, Nomor 3, Edisi XXX, OKTOBER 2004
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (279.048 KB) | DOI: 10.14710/mkts.v12i3.2739

Abstract

In recent years, concrete with compressive strength in excess of 50 MPa has been utilized in building construction. However, many empirical equations used to predict properties of concrete or design structure members are based on test using concrete with compressive strength less than 41 MPa. Applicability of this design equation for high strength concrete structures may lead to conservative or even unsafe design. One such example is the provision for calculating development length of reinforcing bars which is developed based on bond capacity of steel bars embedded in concrete.The research study was motivated by the lack of test data on bond performance of reinforcing bars embedded in high strength concrete especially those related to high-strength fly-ash concrete. More than 35 specimens with various concrete compressive strength fc¢ and bar diameter (deformed and smooth bar) were tested. The result of this experimental shows that bond equation from ACI is too conservative for high strength concrete structures. Kata kunci: Lekatan beban dan tulangan, beton mutu tinggiPermalink: http://www.ejournal.undip.ac.id/index.php/mkts/article/view/2739 [How to cite: Nuroji, 2004, Studi Eksperimental Lekatan antara Beton dan Tulangan pada Beton Mutu Tinggi, Jurnal Media Komunikasi Teknik Sipil, Volume 12, Nomor 3, pp. 27-37]
Perilaku Nonlinier Buckling pada Struktur Cangkang Bola Sumirin, Sumirin; nuroji, nuroji
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 20, Nomor 2, DESEMBER 2014
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (794.769 KB) | DOI: 10.14710/mkts.v20i2.9252

Abstract

This paper presents the results of a numerical study using the finite element method in geometrical nonlinear on camped shallow spherical shells under uniform pressure. The shell structure was modelled by finite axisymmetric thin shell elements and quadrilateral elements. The geometrical nonlininear problem was solved by a scheme of incremental iterative procedures applying Newton-Raphson method in combination with arch length methods. The results of finite element analysis compared with the experimental results of previous reseacher.
PENGUJIAN BALOK BETON DENGAN MENGGUNAKAN TULANGAN EKSTERNAL (BAJA LIPS CHANNEL) Anggono, Dwi; Setiawan, Firman Edy; Nuroji, Nuroji; Partono, Windu
JURNAL KARYA TEKNIK SIPIL volume 1, Nomer 1, tahun 2012
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (684.776 KB)

Abstract

ABSTRAKS   Pengujian balok beton eksternal ini menguji tentang pemanfaatan tulangan eksternal sebagai pengganti tulangan pada beton. Pemasangan baja tulangan eksternal direncanakan bukan dari batang baja tulangan yang berpenampang lingkaran, melainkan baja lips channel yang memiliki lekatan, dan pengekangan pada balok beton. Lips channel sebagai perkuatan di tepi luar balok beton akan menggantikan baja tulangan beton yang tertanam di dalamnya, sehingga jarak antara titik berat lips channel di serat tarik (bawah) dan titik berat daerah tekan balok beton lebih besar. Material terluar beton yang memiliki nilai regangan yang lebih kecil dapat tergantikan dengan baja. Penggunaan tulangan eksternal baja lips channel pada balok beton yang menerima beban lentur sangat menarik diteliti, khususnya cara mengurangi bahkan meniadakan slip antara baja lips channel dan beton. Mutu beton rencana adalah f’c 45 MPa (K500) dengan panjang uji benda 180 cm, lebar 12,5 cm, tinggi 18,5 cm. Kata kunci : Baja Lips Channel, beton bertulang, Slip   ABSTRAKS   Testing of concrete beams externally tested on the use of external reinforcement in concrete reinforcement instead. Installation is planned external reinforcement steel rods instead of steel reinforcement Berpenampang circle, but lips steel channel with coherence, and restraints on concrete blocks. Lips channel as reinforcement at the outer edge of the concrete block will replace the concrete reinforcing steel embedded in it, so the distance between the center of gravity in the fiber channel lips pull (bottom) and gravity concrete beams hit area larger. Concrete outer material has a smaller strain values ​​can be replaced with steel. The use of external reinforcement steel in concrete beams lips channel receiving bending loads very interesting study, particularly how to reduce and even negate the slip between the steel and the concrete channel lips. Quality concrete fc plan is 45 MPa (K500) with a lengthy test object 180 cm, width 12.5 cm, height 18,5 cm. Keywords: Steel Lips Channel, Reinforced Concrete, Slip
LABORATORY TESTING AND MODELING THE INTERFACIAL TRANSITION ZONE OF SLAG-CONCRETE Lie, Han Ay; Nuroji, Nuroji
MEDIA KOMUNIKASI TEKNIK SIPIL Tahun 17, Nomor 3, OKTOBER 2009
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (563.65 KB) | DOI: 10.14710/mkts.v17i3.5171

Abstract

The transition zone at the aggregate surface has a distinctive formation, in terms of its mechanical as well as its physical properties. This layer is recognized as the ITZ (Interfacial Transition Zone) and considered the “weak link”, since micro cracks are commonly initiated in this area. The properties of this ITZ are jet to be investigated. SEM (Scanning Electron Microscope) images only provide qualitative information such as formation, type and relative amount of crystals. Therefore, other means are required to represent a better understanding to the behavior of the ITZ. The mechanical and physical properties of the ITZ are highly influenced by the differentiation in porosity and strength. A mathematical or FEM (Finite Element Model) can be used to bridge this lack of information. This paper deals with the the modeling approach of ITZ as well as the concept of laboratory testing for validation of the model. Keywords: labour group composition, SNI 2002, field labour’s productivity, middle-class housing. ABSTRAK Daerah peralihan antara agregat dan mortar memiliki susunan struktur dan sifat mekanis yang berbeda dengan mortar yang berjauhan dari agregate. Daerah ini dikenal sebagai ITZ (Interfacial Transition Zone) dan diketahui sebagai daerah yang “lemah” karena retak mikro biasanya diawali di ITZ ini. Perilaku mekanis ITZ sangat sulit ditentukan secara tepat, pengamatan menggunakan SEM (Scanning Electron Microscope) hanya dapat memberikan gambaran secara kualitatif, berupa perilaku bentuk, susunan dan jumlah kristal sehingga perlu adanya pendekatan lain yang dapat memberikan nilai kuantitatif terhadap perilaku ITZ. Pengamatan terhadap sifat mekanis dan fisis ITZ terhadap mortar menunjukkan perbedaan kadar pori dan kekuatan. Untuk menggambarkan konfigurasi pori dan kekuatan ITZ dapat digunakan model, baik model matematis atau FEM (Finite Element Model) yang divalidasi dengan hasil pengujian laboratorium. Tulisan ini membahas konsep permodelan ITZ serta metoda validasi di laboratorium. Kata kunci: model, interfacial transition zone, mortar, aggregate, kekakuan
PENGARUH PENGGUNAAN BETON FLY SLAB PADA GEDUNG BERTINGKAT (STUDI KASUS GEDUNG TELKOMSEL SEMARANG) Afdholi, Afdholi; Arso, Jumani; Nuroji, Nuroji; Wibowo, Hadi
JURNAL KARYA TEKNIK SIPIL Volume 2, Nomor 4, Tahun 2013
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (637.043 KB)

Abstract

Telkomsel building structure is located in Jl. Pahlawan Semarang, the buildings was built using conventional reinforced concrete and then replanned using Fly Slab, where the structure of the building was designed by ”Indonesian Concrete Code (SNI03-2847-2002)”, while the analysis of earthquake load uses response spectrum method based on “ Indonesian Seismic Code ( SNI03-1726-2010)”. Fly Slab has been often used in engineering structures, from several studies Fly Slab able to provide good structural performance and more effective in increasing the loading capacity, economical advantages and accelerate the implementation of the work during the process. Fly Slab is a concrete slab with reinforcement in design with high quality technology to produce concrete which is much more effective, efficient and economical than conventional concrete. Structural analyzis calculated with the help of structural analysis program SAP2000 v10. From the results of the calculations it shown that the structural elements of the building was safe analyticaly.
PERENCANAAN STRUKTUR APARTEMEN WHITE PEARL SEMARANG Prayogo, David Mulyawan; Alvianti, Dea Nika; Nuroji, Nuroji; Indarto, Himawan
JURNAL KARYA TEKNIK SIPIL Volume 2, Nomor 4, Tahun 2013
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (483.556 KB)

Abstract

Structural analysis calculations of White Pearl apartment buildings against earthquake load refers to Earthquake Resilience Planning Procedures for Building Structures and Non-Building (SNI 1726-2012), where the analysis of the seismic load high-rise building structures made with Spectrum Analysis Method Dynamic Response. White Pearl apartment building belonging to the Seismic Design Criteria for Type D with high seismic risk level, so the building frame structure configuration bearers that used is Special Moment Frame System (SRPMK). SRPMK system is designed so that the building does not collapse or collapse during an earthquake in excess of the earthquake that has been designed, therefore SRPMK models are designed in order to qualify strong columns weak beams. System with method strong column weak beam does not mean in the literal sense, but rather a column designed to hold the beam at the beam having plastic hinge. At SRPMK models are designed so that plastic joints located at a certain point. Joint at the beam-column relations should also be designed properly to avoid collapse first. This Apartment has a asymmetrical shape, so when there was an earthquake the building will undergo rotational that is caused by the center of stiffness and the center of mass is not located in one spot, so it needs dilatation so that the center of mass and the center of stiffness to coincide. This apartment building has a slim shape, therefore necessary to check the drift story in order to the floor shake is not too big.
Perencanaan Jembatan Leho Kawasan Pesisir Kabupaten Karimun, Kepulauan Riau, dengan Struktur Jembatan Pelengkung (Arch Bridge) Winarno, Adhyta Narendra; Pakpaham, Alfred Nobel; Tudjono, Sri; Nuroji, Nuroji
JURNAL KARYA TEKNIK SIPIL Volume 2, Nomor 4, Tahun 2013
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1213.346 KB)

Abstract

The Design of Leho Bridge in Karimun Coastal Area, Riau Islands, based on the needs of a transportation infrastructure that connecting the Old Town Area with Sei Bati Airport. This Bridge Structure is designed by using an Arch Bridge Structure considering that it’sfunction also as a monumental building.Based on the results of highway capacity analysis, the bridge’s width designed as 9,00 m with 2/2 UD type which the pavement is 7,00 m width and each of the pedestrians are 1,00 m width. Then the bridge’s  span is determined as 60,00 m, based on the gulf’s geometry and the boat’s traffic under the bridge. The Clearance below the bridge is affected by the highest water level and the boat’s heightwhich on this case is taken as 11,00 m.Through the design and the calculation with Load and Resistance Factor Design’s method we found the section of the arch rib is a box formed steel profile which size is 900.900.40.40 with the yield stress is 290 MPa. While the main beam using a box formed steel profile which size is 900.400.30.30 with the yield stress is 290 MPa. The foundation system is designed by using a group of sheet piles which the diameter is 60 cm as much as 24 piles on each abutments.
PERENCANAAN STRUKTUR APARTEMEN WARHOL RESIDENCES SEMARANG Anggoro, Mardani Rizki; Devi, Monica; Nuroji, Nuroji; Adi, Rudi Yuniarto
JURNAL KARYA TEKNIK SIPIL Volume 2, Nomor 4, Tahun 2013
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1585.479 KB)

Abstract

Warhol Residences Apartment is one of the candidates for the skyscrapers that will soon be built in strategic areas Simpang Lima Semarang. These Apartments are located at No. 137 Ahmad Yani Street Semarang. By carrying out the minimalist and modern design, these apartments are expected to meet the needs of the residents of Semarang and foreigner the comfortable dwelling. In this thesis, Warhol Residences apartment’s structure is designed based on the method SRPMK or Special Moment Frame Structure bearers. The main guidelines in this plan are taken from Concrete SNI 03-2847-2002 and RSNI 03-1726-2010 Earthquake. The modeling is made, performed using software Extended Three-Dimensinal Analysis of Building Systems (ETABS) version 9.2.7. Beside that, it also use some other kind of supporting software such as Structure Analysis Program 2000 (SAP 2000), PCACOL, and Auto Cad. Some work items are taken into account include the overall structure of the work of both Primary and Secondary element. Primary structural elements include: Beams, High Beams, Columns, Shearwall / Corewall, joint and Bore Pile Foundation. While the secondary elements are: the plates, and the plate Basement Walls, Stairs, Ramp, and Lift. The analysis showed that the structure of the apartment safe and capable Warhol Residences accounted for analytically.
STUDI KOMPARASI ANTARA PRACETAK MASIF DAN FLY SLAB STUDI KASUS : STRUKTUR GEDUNG RUSUNAWA SURAKARTA Wirawan, Aria; Wicaksono, Budi; Nuroji, Nuroji; Partono, Windu
JURNAL KARYA TEKNIK SIPIL Volume 2, Nomor 4, Tahun 2013
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (12.656 KB)

Abstract

Fly slab is one of the precast concrete slab technological development that has been researched and patented by Ir . Sulistyana in 2011. The concept is how to reduce the mass of precast concrete slab with makes ribs on the concrete slab. To minimize the volume of concrete plate and while maintaining tensile area to makes the style transfer mechanism of concrete to reinforcement or otherwise, are expected to reduce the mass of the structure without reducing strength.Comparative study will be conducted in the final project based on Planning of Building Construction Rusunawa in Surakarta, Central Java 2013. This comparative study is done by compare the results of the structural design Rusunawa existing Surakarta and ready to build using conventional precast concrete massive, with a new structure plan Rusunawa Surakarta with using fly slab as material plate, beam and column structural elements using conventional concrete.Based on the analysis results, showed reduction in the volume of concrete and reinforcement elements beam and coloumn Rusunawa Surakarta structure is 20,25% and 6,3 %. Reduction reaction in the vertical structure of the Rusunawa Building in Surakarta is 16,93%.
STUDI KOMPARASI ANTARA PRACETAK MASIF DAN FLY SLAB STUDI KASUS : STRUKTUR GEDUNG RUSUNAWA SURAKARTA Wirawan, Aria; Wicaksono, Budi; Nuroji, Nuroji; Partono, Windu
JURNAL KARYA TEKNIK SIPIL Volume 2, Nomor 4, Tahun 2013
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1455.9 KB)

Abstract

Fly slab is one of the precast concrete slab technological development that has been researched and patented by Ir . Sulistyana in 2011. The concept is how to reduce the mass of precast concrete slab with makes ribs on the concrete slab. To minimize the volume of concrete plate and while maintaining tensile area to makes the style transfer mechanism of concrete to reinforcement or otherwise, are expected to reduce the mass of the structure without reducing strength.Comparative study will be conducted in the final project based on Planning of Building Construction Rusunawa in Surakarta, Central Java 2013. This comparative study is done by compare the results of the structural design Rusunawa existing Surakarta and ready to build using conventional precast concrete massive, with a new structure plan Rusunawa Surakarta with using fly slab as material plate, beam and column structural elements using conventional concrete.Based on the analysis results, showed reduction in the volume of concrete and reinforcement elements beam and coloumn Rusunawa Surakarta structure is 20,25% and 6,3 %. Reduction reaction in the vertical structure of the Rusunawa Building in Surakarta is 16,93%.