concrete-filled steel tube (CST)

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Modifikasi Perencanaan Struktur Gedung Office Biliton Surabaya dengan Menggunakan Kolom Rectangular Concrete Filled Steel Tube (RCFT) dan Balok Octagonal Castellated - ITS Repository

Modifikasi Perencanaan Struktur Gedung Office Biliton Surabaya dengan Menggunakan Kolom Rectangular Concrete Filled Steel Tube (RCFT) dan Balok Octagonal Castellated - ITS Repository

Gedung Office Biliton merupakan gedung yang pada awalnya menggunakan struktur beton bertulang. Sebagai bahan studi perancangan bangunan ini di modifikasi menggunakan struktur baja menggunakan kolom Rectangular Concrete Filled Steel Tube (RCFT) dan balok Octagonal Castellated dengan sistem dinding geser plat baja (Steel Plate Shear Wall). Dinding geser plat baja (Steel Plate Shear Wall) adalah sebuah sistem penahan beban lateral yang terdiri dari plat baja vertikal padat yang menghubungkan balok dan kolom di sekitarnya yang terpasang sepanjang ketinggian struktur sehingga membentuk sebuah dinding penopang. Tujuan tugas akhir ini adalah diharapkan dapat menjadi rekomendasi untuk proyek-proyek selanjutnya yang ada di Indonesia agar dapat memanfaatkan material baja sebagai bahan struktur gedung dengan pertimbangan keuntungan penggunaan material baja sebagai struktur utama gedung.
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ANALISIS PRODUKTIVITAS WAKTU PENGGUNAAN TATEKATA- ACE PADA ERECTION KOLOM CONCRETE FILLED STEEL TUBE (CFT)

ANALISIS PRODUKTIVITAS WAKTU PENGGUNAAN TATEKATA- ACE PADA ERECTION KOLOM CONCRETE FILLED STEEL TUBE (CFT)

Takenaka – Total Joint Operation adalah salah kontraktor yang menerapkan inovasi untuk mencapai efektivitas pada setiap item pekerjaan. Salah satu inovasi Takenaka – Total Joint Operation adalah penerapan metode erection/lifting kolom Concrete Filled Steel Tube (CFT). Permasalahan yang diambil dalam penelitian ini adalah masih digunakanya erection/lifting menggunakan metode konvensional sehingga terjadi ketidakefektivan waktu pelaksanaan pekerjaan erection/lifting kolom Concrete Filled Steel Tube (CFT). Pada penelitian ini dibandingan efektivitas erection/lifting kolom Concrete Filled Steel Tube (CFT) menggunakan metode konvensional dengan metode Tatekata-ace yang merupakan inovasi dari Takenaka – Total Joint Operation sebagai kontraktor dengan menggunakan simulasi CYCLONE (CYCLic Operation Network).Dari kedua metode tersebut, didapat hasil analisis produktivitas erection kolom Concrete Filled Steel Tube (CFT) menggunakan metode konvensional adalah 0.007879 unit/menit atau 0.472752 unit/jam. Sedangkan analisis produktivitas erection kolom Concrete Filled Steel Tube (CFT) menggunakan metode Tatekata-ace adalah 0.00825 unit/menit atau 0.495473 unit/jam. Metode erection kolom Concrete Filled Steel Tube (CFT) dengan menggunakan Tatekata-ace adalah lebih efektif dibandingkan dengan menggunakan metode konvensional. Pada metode konvensional akan lebih efektif jika diterapkan pada tipe proyek horizontal sedangkan metode Tatekata-ace akan lebih efektif diterapkan pada tipe proyek vertikal.
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KOMPONEN STRUKTUR BAJA CONCRETE-FILLED STEEL TUBE (CFT) SEBAGAI INOVASI ALTERNATIF STRUKTUR KUDA-KUDA UNTUK BANGUNAN GEDUNG

KOMPONEN STRUKTUR BAJA CONCRETE-FILLED STEEL TUBE (CFT) SEBAGAI INOVASI ALTERNATIF STRUKTUR KUDA-KUDA UNTUK BANGUNAN GEDUNG

This article explains about the use of Steel Tube (ST) as the structural component of trusses, by elaborating the structural component of Concrete-Filled Steel Tube (CFT) as the compressive beam for steel trusses, in which CFT beam is made of CFT used widely within the society as the furniture material (iron furniture), and then is filled in with concrete and Steel tube (ST) as impressive beam. This study departs from the problems concerning the light steel roof collapse case frequently occurring due to the structural failure because there has been no Indonesian National Standard (SNI) governing about the light steel structure design. Departing from this problem, an opportunity emerges to find the alternative structure, with Concrete-Filled Steel Tube (CFT). SAP 2000 version 11 analysis was carried out to compare the structure of ST and CFT beams frame providing that in the same loading, deflection occurring in the CFT beam frame structure is 20.08% less than that occurring in ST beam frame structure.
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MODIFIKASI PERENCANAAN APARTEMENT BALE HINGGIL SURABAYA DENGAN MENGGUNAKAN CONCRETED FILLED STEEL TUBE DAN ECCETRICALLY BRACED FRAMES - ITS Repository

MODIFIKASI PERENCANAAN APARTEMENT BALE HINGGIL SURABAYA DENGAN MENGGUNAKAN CONCRETED FILLED STEEL TUBE DAN ECCETRICALLY BRACED FRAMES - ITS Repository

Sebagai bahan studi perencanaan, akan dilakukan modifikasi perencanaan pada struktur gedung apartement Bale hinggil yang terletak di Jl. DR. Ir. Soekarno, Surabaya jawa timur. Penggunaan beton bertulang sebagai struktur pemikul utama konstruksi gedung ini dinilai masih kurang efektif dalam pemanfaatan penampang, sehingga struktur gedung ini dilakukan modifikasi dengan metode Concrete filled steel tube dan Eccentrically Braced Frame (EBF).

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MODIFIKASI PERENCANAAN APARTEMEN DE PAPILIO TAMANSARI SURABAYA MENGGUNAKAN STRUKTUR KOMPOSIT BAJA- BETON

MODIFIKASI PERENCANAAN APARTEMEN DE PAPILIO TAMANSARI SURABAYA MENGGUNAKAN STRUKTUR KOMPOSIT BAJA- BETON

Nippon Steel pada tahun 1975, awalnya mengembangkan teknologi struktur gedung yang terfokus pada struktur baja. Contoh – contoh teknologi konstruksi yang di kembangkan antara lain: concrete-filled tube (CFT) columns, yang diberi perhatian khusus pada proyek – proyek rumah susun; steel-encased reinforced concrete (RC) columns, untuk pembangunan gedung apartemen yang tinggi dari beton bertulang; dan PLRC (steel plate-reinforced concrete) columns, yang menggunakan kolom baja yang dikompositkan dengan pelat baja dan beton bertulang untuk pembangunan gedung apartemen yang tidak terlalu tinggi sampai yang sangat tinggi. (Nakamura & Ohya, 1995)
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COMPRESIVE STRENGTHS AND MODULUS OF ELASTICITY OF STEEL FIBER REINFORCED CONCRETE  Compresive Strengths And Modulus Of Elasticity Of Steel Fiber Reinforced Concrete Under Different Temperature Conditions.

COMPRESIVE STRENGTHS AND MODULUS OF ELASTICITY OF STEEL FIBER REINFORCED CONCRETE Compresive Strengths And Modulus Of Elasticity Of Steel Fiber Reinforced Concrete Under Different Temperature Conditions.

From the research findings can be concluded that 1) The addition of 1% and 1.5% steel fiber in concrete mix is advantageous for concrete; 2) Overall the compressive strength of concrete was increased as the percentage of steel fiber in concrete increases. Up to 1.5% , Steel fiber reinforced concrete showed a better overall residual strength and better crack resistance than non-fiber concrete; 3) The carbonation process for concrete with steel fiber is a little influenced by temperature compare to concrete without steel fiber; and 4) The concrete with 1.5 % steel fiber demonstrated the highest compressive and modulus of elasticity value, 23.5 and 17172 MPa at 600 0 C respectively. It is expected that in future concrete having steel fiber will act as a fire protective considerably.
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EFFECT OF THE USE OF STEEL WASTE INTO MECHANICAL PROPERTIES OF CONCRETE

EFFECT OF THE USE OF STEEL WASTE INTO MECHANICAL PROPERTIES OF CONCRETE

Concrete is one option as a structural material in building construction. Concrete desirable because it has many advantages compared with other materials, among other things: the price is relatively inexpensive, has good strength, constituent raw materials readily available, durable, resistant to fire, do not decay, and so forth. Concrete technology innovation is always required in order to answer the challenge will be a requirement. The resulting concrete is expected to have high quality which includes strength and durability without neglecting its economic value. Moreover, with increasing climate change we need an innovation in the world of construction in order to create a concrete constituent materials are friendly to the environment. One way to use the waste production of steel called the PS Ball.
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Pengujian Model Kondensor Dengan Tube Stainless Steel Diameter 1 Inchi Untuk Destilasi Tetes Tebu dan Ubi Kayu.

Pengujian Model Kondensor Dengan Tube Stainless Steel Diameter 1 Inchi Untuk Destilasi Tetes Tebu dan Ubi Kayu.

Bahan yang di uji pada penelitian ini adalah tetes tebu dan ubi kayu yang telah di campur dengan ragi tape, NPK,urea untuk di fermentasi selama 10 hari. Hasil dari fermantasi kemudian di destilasi dengan menggunakan kondensor pipa konsentrik tube stainless steel dengan diameter 1 inch. Variasi bilangan Reynolds ini untuk dapat melihat temperatur, daya pompa, dan hasil kondensat. Alat-alat utama yang di gunakan dalam pengujian ini adalah kompor, termokopel, pompa air, flow meter air, timbangan digital, avometer, alkohol meter.

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Smart Puller Quick Puller Tube Extracting Tool

Smart Puller Quick Puller Tube Extracting Tool

Works as a compressed air-powered cleaner for both straight and curved-tubes. Because the rotation part is an air-cooled, air-driven rotary motor, this cleaner does not create heat generation after long and continuous use. In the case of overloading, it stops the rotation to prevent damaging the tube inner surface. With the efficient use of exhaust air, this tool clears away loose scale from the tube, and cools the connecting head at the same time.

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PENGARUH KECEPATAN ALIRAN TERHADAP EFISIENSI ALAT PENUKAR PANAS (EFFECT OF FLOW RATE TO EFFICIENCY OF HEAT EXCHANGER) - Diponegoro University | Institutional Repository (UNDIP-IR)

PENGARUH KECEPATAN ALIRAN TERHADAP EFISIENSI ALAT PENUKAR PANAS (EFFECT OF FLOW RATE TO EFFICIENCY OF HEAT EXCHANGER) - Diponegoro University | Institutional Repository (UNDIP-IR)

Variabel Percobaan Pada pengujian kinerja alat penukar panas ini menggunakan jenis shell and tube dengan material carbon steel dan dilengkapi sensor suhu, dengan menggunakan variabel[r]

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Stress Strain Behaviour And Modulus Of Elasticity Of Steel DustCollector Concrete

Stress Strain Behaviour And Modulus Of Elasticity Of Steel DustCollector Concrete

Hasil penelitian modulus elastisitas beton dengan bahan substitusi limbah debu steel dust collector disajikan pada Tabel 3 dan Gambar 3. Pengujian modulus elastisitas beton dilakukan dengan memberikan beban secara bertahap sampai mencapai beban 40 % beban puncak. Pemendekan benda uji ( ∆ L) untuk menghitung regangan longitudinal diperoleh dari hasil pemba- caan pada dial gauge yang dipasang pada benda uji. Nilai modulus elastisitas beton hasil eksperimen dibandingkan dengan modulus elastisitas teoritis formulasi SNI 03-2846 (2002) pasal 10.5 yaitu sebesar E c = 4700 f c ' .

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DESIGN OF DRY CASK STORAGE FOR SERPONG MULTI PURPOSE REACTOR SPENT NUCLEAR FUEL

DESIGN OF DRY CASK STORAGE FOR SERPONG MULTI PURPOSE REACTOR SPENT NUCLEAR FUEL

DESIGN OF DRY CASK STORAGE FOR SERPONG MULTI PURPOSE REACTOR SPENT NUCLEAR FUEL. The spent nuclear fuel (SNF) from Serpong Multipurpose Reactor, after 100 days storing in the reactor pond, is transferred to water pool interim storage for spent fuel (ISFSF). At present there are a remaining of 245 elements of SNF on the ISSF,198 element of which have been re-exported to the USA. The dry-cask storage allows the SNF, which has already been cooled in the ISSF, to lower its radiation exposure and heat decayat a very low level. Design of the dry cask storage for SNF has been done. Dual purpose of unventilated vertical dry cask was selected among other choices of metal cask, horizontal concrete modules, and modular vaults by taking into account of technical and economical advantages. The designed structure of cask consists of SNF rack canister, inner steel liner, concrete shielding of cask, and outer steel liner. To avoid bimetallic corrosion, the construction material for canister and inner steel liner follows the same material construction of fuel cladding, i.e. the alloy of AlMg2. The construction material of outer steel liner is copper to facilitate the heat transfer from the cask to the atmosphere. The total decay heat is transferred from SNF elements bundle to the atmosphere by a serial of heat transfer resistance for canister wall, inner steel liner, concrete shielding, and outer steel liner respectedly. The rack canister optimum capacity of 34 fuel elements was designed by geometric similarity method basedon SNF position arrangement of 7 x 6 triangular pitch array of fuel elements for prohibiting criticality by spontaneous neutron. The SNF elements are stored vertically on the rack canister. The thickness of concrete wall shielding was calculated by trial and error to give air temperature of 30 o C and radiation dose on the wall surface of outer
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ANALISIS KUAT LEKAT TULANGAN BAMBU PETUNG TAKIKAN TIPE U JARAK 5 CM TERHADAP TULANGAN BAJA

ANALISIS KUAT LEKAT TULANGAN BAMBU PETUNG TAKIKAN TIPE U JARAK 5 CM TERHADAP TULANGAN BAJA

The method in this study is an experimental laboratory. Test specimen is cylinder concrete which its diameter and high was 15 cm and 30 cm. in the middle of test specimen was buried a reinforcement with 25 cm of depth. The reinforcements was plain steel with 8 mm of its diameter and plain Ori, Petung, Wulung bamboo with 10x5.2 mm of its dimension. This test is performed in the Machine Laboratory, Faculty of Engineering of Sebelas Maret University (UNS), on the concentrate age of 28 days using Universal Testing Machine (UTM).

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Tube : Oil resistant synthetic rubber Reinforcement : Two high tensile steel wire

Tube : Oil resistant synthetic rubber Reinforcement : Two high tensile steel wire

SAE J 517 / 100 R5 Tube : High temperature hydraulic oil resistant special synthetic rubber Reinforcement : Synthetic textile and 1 high tensile steel wire braid Cover : Oil and w[r]

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DESIGN OF COLUMN BASE PLATES AND STEEL ANCHORAGE TO CONCRETE

DESIGN OF COLUMN BASE PLATES AND STEEL ANCHORAGE TO CONCRETE

 Anchor rods are needed for all base plates to prevent column from overturning during construction and in some cases to resist uplift or large moments  Anchor rods are designed for pu[r]

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The Study of Concrete with Industrial Steel Slag Aggregates Based

The Study of Concrete with Industrial Steel Slag Aggregates Based

The study demonstrated that the compression-strength-to-conventional-concrete ratio increases, as the coarse slag content ascends. However, the addition of fine slag will decrease the compression strength significantly. From the results it was also proven that with a 100% of slag substitution the heavy-metal leaching concentration rate is below the assigned border mandated by the Department of Industry regulations and supports the International Atomic Energy Agency margins.

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TRANSVERSE STRESS DISTRIBUTION IN CONCRETE COLUMNS EXTERNALLY CONFINED BY STEEL ANGLE COLLARS

TRANSVERSE STRESS DISTRIBUTION IN CONCRETE COLUMNS EXTERNALLY CONFINED BY STEEL ANGLE COLLARS

In this study, an important assumption is made by making perfect bond between concrete column and the steel collars. This assumption is modeled by giving “ tie ” constraint for contact surface between steel angle collars and concrete. The connections at four corners of each collar are also assumed to be perfect. This is modeled by blending the four steel angles into one monolithic steel angle collar, without connection in its corners (Figure 2).

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The Improvement of Reinforced Concrete Column Capacity with External Confinement.

The Improvement of Reinforced Concrete Column Capacity with External Confinement.

Geographical condition of Indonesia is located right above the tectonic plates (the Indo- Australian, Eurasian, and Pacific), crossed by two seismic lines (Circum Pacific and Trana Asiatic Earthquake Belts), and traversed paths Ring of Fire Java / Sunda Trench, that has become one of the countries with the risk of a large earthquake. Earthquake mitigation are steps that have to be taken to reduce loss of life and property, by design of earthquakeresistant structures that have high ductility. One of the way to improve the ductility is the restraint of reinforced concrete elements. The collapse of the structural column is very significant in terms of economic and human safety, therefore it is necessary to design the bottom of the column design to achieve high ductility.
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Analyst Meeting Presentation FY 2011 Results

Analyst Meeting Presentation FY 2011 Results

 Krakatau Steel completed the revitalization of the Hot Strip Mill in April 2011. The Hot Strip Mill resumed production in April 2011 after passing the performance test and is currently working at full production capacity of 2.4 million tons/year. Furthermore, the revitalization of the Direct Reduction Plant and the Slab Steel Plant has reached 96.7% and 82.1%, respectively, as of February 2012.

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Study On Shock-Absorbing Properties Of Square Tube Strengthening Structure.

Study On Shock-Absorbing Properties Of Square Tube Strengthening Structure.

Wierzbicki and Abramowicz (1989) analyzed the crushing of thin-walled multicorner structures made from plate elements, by considering stationary plastic hinges and narrow toroidal regions of circumferential stretching and bending which travel through the structure. As a special case of the multicorner column, the mean crushing load ( P av) for the symmetrical collapse mode of a square tube made of rigid – plastic material takes the form. Abramowicz and Wierzbicki (1989).

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