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INDONESIA
JURNAL KARYA TEKNIK SIPIL
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
Arjuna Subject : -
Articles 38 Documents
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Search results for , issue "Volume 3, Nomor 4, Tahun 2014" : 38 Documents clear
STUDI EKSPERIMENTAL PENGARUH TEGANGAN TEKAN SELAMA PROSES PRODUKSI TERHADAP KUAT TEKAN DRY CONCRETE M. Mirza Abdillah Pratama; Vemi Widoanindyawati; Han Ay Lie; Purwanto Purwanto
Jurnal Karya Teknik Sipil Volume 3, Nomor 4, Tahun 2014
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (452.617 KB)

Abstract

Dry concrete is basically a cementitious material, consisting of aggregates imbedded in a cement matrix that function as the binding agent. The water cement factor during this production is customary kept low, since from the economic point of view, speed in production is favored. A low water-cement-factor will result in a faster unmolding of elements. As a consequence, the probability of the hydration process is not at optimum. A technique of optimizing the hydration process is to apply a compression stress to the dry concretes, during the hydration stage. This stress is aimed to reduce the air voids in the mixture and to enable the entrapped water within the mortar to optimize the reaction with the cement. The application of compression stress is not only freed the entrapped water, but also creates a more dense material so it will provides a better performance of the dry concrete. This study uses 2 types of mix design with a water-cement ratio of 0.4 and 9 types of compressive stress variations during the production process from 0 MPa to 40 MPa. The experimental test showed that the compressive stress during the production process affect the compressive strength of dry concrete. The greater compressive stress given during the production process increase the compressive strength of the dry concrete. This increase occurred gradually until it reaches the optimum compressive stress, which is 35 MPa. The rate of increase in compressive strength and the optimum compressive stress on both the mix design is in the same point, it is due to both the mix design using the same water-cement ratio.
ANALISIS STABILITAS LERENG DAN ALTERNATIF PENANGANANNYA : STUDI KASUS LONGSORAN PADA RUAS JALAN PRINGSURAT KM. MGL. 22+631 – 22+655 KABUPATEN TEMANGGUNG Apri Luriyanto; Iqbal Maulana; Sri Prabandiyani Rento Wulandari; Indrastono Dwi Atmanto
Jurnal Karya Teknik Sipil Volume 3, Nomor 4, Tahun 2014
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

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Abstract

This thesis contained about the stability of the soil and it countermeasures on roads Pringsurat KM. MGL. 22 +631 -  22 +655 District of Temanggung. Pringsurat landscape is hilly mountainous and prone to landslide. This road section is a class II national road built to connect cities in Central Java such as Semarang, Temanggung, Magelang with the cities of Yogyakarta. This road crosses the hills that contain layers of silt soil, clay, and sandy. Landslide occurred on roads Pringsurat KM. MGL. 22 +631 - 22 +655 District of Temanggung. The data used in this case study is primary data and secondary data. Data collection was conducted using interviews, direct observation in the field, and method literature. Method of analysis in this thesis is to calculate the slope stability and provide solutions to the problems that occur. Geotechnical analysis done in two ways, with the manual method and the program. Manual analysis method by Whitlow (1995) for multilayer soil while the program analyzes using Plaxis software V.8.2. Model of elastic and plastic collapse of Mohr-Coulomb criterion chosen as a model soil. The analysis showed that the landslide occurred at KM. MGL. 22 +631 - 22 +655. To deal with such matters tried with two alternatives, namely the handling of avalanches with geotextile type BW250 Woven and boored Pile, where the two alternatives are able to cope with the handling of landslides as evidenced by the results of the Safety Factor values 1.4114 and 1.4617 for Geotextile for boored Pile.
STUDI EKSPERIMENTAL PEMBERIAN TEGANGAN AWAL PADA DINDING BATAKO TANPA PLESTER DAN TANPA PEREKAT (BTPTP) DALAM MENERIMA BEBAN Firmansyah, Iman; Matheus, Patrick; Purwanto, Purwanto; Sabdono, Parang
Jurnal Karya Teknik Sipil Volume 3, Nomor 4, Tahun 2014
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

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Abstract

Before the development of the framework structure (using beams and columns), loadbearing wall structure with loads that will work on the building structure bestowed on the walls commonly used in the community. One form loadbearing wall structure is commonly used arrangement brick wall. Adobe is a brick made by printing and maintaining in a damp atmosphere, tras mix, lime and water with or without other additives. One brick technology that has been developed is the use of brick without plaster and adhesives. The composition brick wall has a good ability in resisting axial forces but weak in resisting lateral forces. One of the solutions used to improve the ability of the composition of the brick wall is the lateral force resist giving the initial prestressing force (prestressed) through fastening reinforcement (via tightening bolts). Prediction failure of brick wall composition into focus the problem in this research. Experimental testing in the laboratory, carried out to see the damage that occurs in the form of brick walls in receiving loads (axial and axial-lateral). Abaqus (Simulia 6.10.1) Explicit is used as validation in predicting the form of failure that occurs in the composition of the brick Wall which receives load.
PENGARUH KOMPOSISI NANO SEMEN TERHADAP KUAT TEKAN MORTAR Dion Aji Fadlillah; Frisky Sustiawan; Han Ay Lie; Purwanto Purwanto
Jurnal Karya Teknik Sipil Volume 3, Nomor 4, Tahun 2014
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

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Abstract

The micro voids in the cement paste of cementitious material drastically reduce the load-carrying capacity of the element, due to the reduction in area. On the other hand, the weak interface between aggregates and mortar induces micro-crack initiation and promote crack propagation. It therefore becomes curial to reduce the voids in the mortar, and promotes a better hydration degree of cement. A method that has been proven effective is the use of nano-cement particles. The smaller cement particles will result in a better hydration process, and create less large ettringites and calcium hydrates. This research work studied the effect of nano-cement percentage in the mortar mix by the substitution method. The ratio in weight of the nano-cement with respect to the normal cement ranged from 0%, 20%, 40%, 60%, 80%, to 100%. The specimens sized 50 × 50 × 50 mm were tested at the age of 28 days to obtain their compression strength. The cement-to-sand proportion was 1 to 2.75, while a water-cement-ratio of 0.485 was maintained throughout the experiments. Two cement types, PCC (Portland Composite Cement) and PPC (Portland Pozzolane Cement), all Indonesian based products, were compared to obtain a picture of the overall cement condition in Indonesia, and the effectiveness of the nano-cement use to each of the types.
KAJIAN PEMILIHAN PEKERJAAN BASEMENT PADA BANGUNAN BERTINGKAT TINGGI MENGGUNAKAN METODE TOP DOWN SEBAGAI INOVASI METODE PELAKSANAAN (STUDI KASUS : PROYEK SUDIRMAN SUITES HOTEL AND APARTMENT JAKARTA) Nopirin Abliataniaga Bintang; Mahayekti Bagaskara; M. Agung Wibowo; Arif Hidayat
Jurnal Karya Teknik Sipil Volume 3, Nomor 4, Tahun 2014
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

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Abstract

This paper explains on studies of top down basement construction method on high rise building as innovation of construction method. Nowadays, in the world of construction there are varies of innovations; one of them is top down method for basement construction. Sudirman Suites Hotel and Apartment is a project of 22 levels building and 5 levels of basement located in the middle of large city where there are already many buildings and activities surrounding. PT. Wika Gedung as a main contractor decided to apply top down method for 5 levels of basement with 24,4 m deep. As comparation there is Menara Sentraya project on Blok-M, which conventionally constructed with bottom up method. This research uses Sudirman Suites Hotel and Apartment’s site manager’s correspondency as primary data. Shop drawings, proposed budget, time schedule and site plan for the secondary data. Data analyzation method is to compare primary data on both project and uses secondary data for validation. Main reason for top down method for basement construction is the limited project area, only 4792.331 m2 and 2769.15 m2 for the excavation zone, moreover, open cut is not feasible to excavate 24,4 m deep without any reinforcements.
KAJIAN STRUKTUR PENGAMAN PANTAI SIGANDU, BATANG Widhianto, Sidiq Leonanda; Kharisma, Dicki; Suharyanto, Suharyanto; Hardiyati, Siti
Jurnal Karya Teknik Sipil Volume 3, Nomor 4, Tahun 2014
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

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Abstract

Generally, the problems that occur in Sigandu Beach - Batang is abrasion, resulting in damage to the beach. This has an impact on the coastal areas along the coast of Sigandu, among others land that has been covered with sea water exceeds 2 m within 5 months, trees and houses around the beach collapsed due to erosion beach by sea water. The information and supporting data are collected from several literatures, interview, laboratory research, and a collection of documents from several institutions, including the Department of Marine and Fishery of Batang, BPDP and BPPT of Yogyakarta in 2013, BMKG Climatology Station in Semarang, Soil Mechanics Laboratory of Diponegoro University and several other institutions. The dominant wind direction effect used in the calculations come from the Northwest and North. Wave height representative used a H33% at 2,94 m and a representative period T33% 8,82 seconds. Sea level caused of tide by the calculation of admiralty generating value HWL =+0.49 m; MSL = ± 0.00 m; LWL = -0.49 m. The tide of Sigandu Beach included in mixed tide prevailing semidiurnal. In the calculation, the wave breaking occurs at a depth of 4.22 m at a distance of ± 787.09 meters from the shoreline. Based on studies of the selection safety structure from some aspects of the Sigandu Beach, the elected lower threshold breakwater structure (Pegar) Geotube. Because a bad soil conditions in Sigandu Beach, then there needs to be retaining structures on Geotube is by giving it a pile of bamboo and bamboo mattresses that had been assembled under the structure of Geotube. Geotube structure is composed of Giant Sand Bag with dimension length 20 m, width 2 m and 1,5 m high with a weight of 6 tons/m' and Sand Bag with dimension length 2,2 m, width 1,4 m, and height 0,4 m with a weight of 1,12 tons/m'. To be expected to form the salient, the structure compiled in series with spacing distance of 10 m with a 100 m length of the building and placed 75 m from the shoreline.
KAJIAN PORTAL BAJA SRPMB (ELASTIS) DAN PORTAL BAJA SRPMK (DAKTAIL) BERDASARKAN SNI 03-1726-2012 DAN SNI 03-1729-2002 Hamdany Auliya; Sarwiasih Tri Purboningrum; Han Ay Lie; Himawan Indarto
Jurnal Karya Teknik Sipil Volume 3, Nomor 4, Tahun 2014
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

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Abstract

The most current Indonesia National Standard on earthquakes SNI 03-1726-2012 is designed to anticipate the latest earthquake events in the past decade. This standard as well as the former SNI 03-1729-2002 incorporates the guidance for Ordinary Moment Resisting Frame Systems(SRPMB)andSpecial Moment Resisting Frame Systems (SRPMK). This study evaluates the performance steel frames based on the two standards for high, and intermediate seismic regions with a variation in soil conditions. The aim of this study was to obtain the most appropriate structural steel system for high and intermediate earthquake regions. The analysis was performed with the aid of a structural analysis program, and approached as a two-dimensional case. The responseof earthquake loads was analyzed by the dynamic response spectrum modal analysis on 8, 10 and 12 storey buildings. The Semarang area was chosen for the intermediate seismic response, while Banda Aceh functioned a prototype for the high seismic area. Three soil types were taken into consideration; hard, medium and soft soil. The study showed that the nominal of the earthquake load in the area of Banda Aceh was approximately equal to 164% of the nominal earthquake load in Semarang. For the variations in soil type it was found that for the Semarang as well as the Banda Aceh region, the nominal earthquake loads on a steel structure based on the SRPMB was approximately equal to 228,6% to the SRPMK. Further it was concluded that the SRPMK steel stucture was able to reduce the earthquake load by approximately 87,5% as compared to the SRPMB steel structure that resulted in an earthquake load reduction of 71,4%. It was therefore advised to use the SRPMK in designing steel structures for areas in high seismic regions, whiles for the medium seismic regions the both the SRPMB and the SRPMK method will yield in an optimum design.
PERENCANAAN CHECK DAM DAS LUSI DI KABUPATEN BLORA Septina Qurniawati; Ivanna Susanto; Pranoto Samto Admodjo; Sri Sangkawati
Jurnal Karya Teknik Sipil Volume 3, Nomor 4, Tahun 2014
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

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Abstract

The unequal streamflow in Lusi Watershed throughout the year is caused by the disrupted hydrological cycle. Excess water during the rainy season that will be wasted and cause flood. Otherwise water scarcity happens during the dry season that cause drought.Besides there are many meandering that cause scour in river bend and landslide that may affect in the amount of sediment accumulated in Lusi riverbank. To address these issues, creating shortcut and building check dam are one of the approriate alternate ways. This shortcut is to overcome the landslide that is located near the village road. Otherwise the building of  this check dam is to overcome the scour and landslide that cause sedimentation. In addition it is aimed to decelerate the velocity of water flowing in Lusi riverbank and also will be modified as a storage in old riverduring the dry season. The calculation of the design flood discharge is to determine the maximum discharge of the river with a certain return period using Rational, Haspers, FSR Jawa-Sumatra and Passing Capacity Method. According to the analysis result, the design flood discharge is 786.3 m3/s and the erosion and sedimentation level is 56.039 tons/ha/year estimated by USLE Method. From the calculation the height of check dam is 4 m, it collects water 326938 m3, that will be benificial for the people in dry season.
STUDI EKSPERIMENTAL PENGARUH TEGANGAN TEKAN SELAMA PROSES PRODUKSI TERHADAP KUAT TEKAN DRY CONCRETE M. Mirza Abdillah Pratama; Vemi Widoanindyawati; Han Ay Lie; Purwanto Purwanto
Jurnal Karya Teknik Sipil Volume 3, Nomor 4, Tahun 2014
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (452.617 KB)

Abstract

Dry concrete is basically a cementitious material, consisting of aggregates imbedded in a cement matrix that function as the binding agent. The water cement factor during this production is customary kept low, since from the economic point of view, speed in production is favored. A low water-cement-factor will result in a faster unmolding of elements. As a consequence, the probability of the hydration process is not at optimum. A technique of optimizing the hydration process is to apply a compression stress to the dry concretes, during the hydration stage. This stress is aimed to reduce the air voids in the mixture and to enable the entrapped water within the mortar to optimize the reaction with the cement. The application of compression stress is not only freed the entrapped water, but also creates a more dense material so it will provides a better performance of the dry concrete. This study uses 2 types of mix design with a water-cement ratio of 0.4 and 9 types of compressive stress variations during the production process from 0 MPa to 40 MPa. The experimental test showed that the compressive stress during the production process affect the compressive strength of dry concrete. The greater compressive stress given during the production process increase the compressive strength of the dry concrete. This increase occurred gradually until it reaches the optimum compressive stress, which is 35 MPa. The rate of increase in compressive strength and the optimum compressive stress on both the mix design is in the same point, it is due to both the mix design using the same water-cement ratio.
RE-DESIGN DAN PENANGANAN BREAKWATER DI PELABUHAN BATANG Ari Surya Bawono; Rizki Indianto; Indrastono Dwi Atmanto; Bambang Pardoyo
Jurnal Karya Teknik Sipil Volume 3, Nomor 4, Tahun 2014
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

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Abstract

Onshore espescially needed a prevention to sea water abration towards the  geomorfology of shore. The Ones of prevention is build a breakwater. Breakwater must be analyst for strong to prevent from sea water  pressure are come from the sea wave. That analyst include condition where on slope occured landslide are make The building collapse. On this analyst is settle The manual analysis of slope stability with  Fellenius method and Plaxis analisys for breakwater on sta 00+350 in Ports of  Batang Districs. Result of this analyst is generate 1.25 < Safety of Factor < 1.4 is determined that The slope stability on breakwater is safe but not stable and The handling solution based on construction is used The bore-pile foundation Ø800mm with depth 24 m from seabed and elevation step construction.

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