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Civil Engineering Forum Teknik Sipil
Published by Universitas Kristen Petra Surabaya
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
Arjuna Subject : -
Articles 54 Documents
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SISTEM INFORMASI PENGAWASAN KENDARAAN ANGKUTAN BARANG PADA JEMBATAN TIMBANG UNTUK PENENTUAN PELANGGARAN MUATAN LEBIH DAN DAMAGE FACTOR (Studi Kasus Daerah Istimewa Yogyakarta) Simatupang, Rudy Handry Halomoan; Sartono, Wardhani; Christady H, Hary
Civil Engineering Forum Teknik Sipil Vol 18, No 2 (2008): MEI 2008
Publisher : Civil Engineering Forum Teknik Sipil

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Abstract

Government has determined maximum limit of axle pressure for vehicle passing in the road of MST (Heaviest Axle Load) < 8 ton, MST 8 ton and MST 10 ton. But, the problem is that there are many overloaded freight vehicles. The lack of control and law application causes the happening of case like overloaded resulting in faster damage than the planned duration and traffic accident involving freight truck. Daerah Istimewa Yogyakarta is a province connecting East java – Central Java – West Java. It has potential to serve traffic flow, either passenger or freight. Therefore it needs a system to control freight vehicle in measuring bridge. Information System of Freight vehicle control (SIWASAL) used reaction analysis of freight vehicle dimension and the calculation of damage factor. Axle configuration discussed based on field observation and load survey carried out by PUSTRANS JALAN in 2002 in Pantura, comprised of 1.1, 1.2, 1.22, 11.22, 1.2+22 (coupled freight vehicle), 1.22+22 (coupled freight vehicle), 1.2-2 (attached freight vehicle), 1.2-22 (attached freight vehicle), 1.22-22 (attached freight vehicle), 1.22-222 (attached freight vehicle). The result of this system helped the operator of measuring vehicle weight limit’s in applying the law and could be used by the government as the database in controlling, planning, maintaining and developing road pavement and give information, either to the employer of freight vehicle and society. The release of data process will present the number of the vehicle, trade mark/type, the name of the company, origin/destination, type of goods loaded, JBB, JBI, the weight of each vehicle axle, loading capacity, MST and vehicle damage factor. The recapitulation of freight vehicle control comprised of vehicle type, the name of the company, origin, destination, type of goods and axle configuration comprising of damage factor amount presented in the form of graphic periodically.
KAJIAN PENANGANAN SEDIMENTASI DENGAN WADUK PENAMPUNG SEDIMEN PADA BENDUNGAN SERBAGUNA WONOGIRI Sardi, Sardi; Kironoto, Bambang Agus; Jayadi, Rachmad
Civil Engineering Forum Teknik Sipil Vol 18, No 3 (2008): SEPTEMBER 2008
Publisher : Civil Engineering Forum Teknik Sipil

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Abstract

High rate of sedimentation in Wonogiri Multipurpose Dam may cause the dam service period to become shorter than the prior plan. The discharge of Wonogiri Multipurpose Dam is an accumulation of inflow from several main rivers, including Keduang River which is located at the east side of the dam. Keduang River supplies very high sedimentation input to the reservoir. One of the steps studied and to be implemented in the sediment countermeasure was the building of sediment pocket dam in Keduang River mouth before it enters the reservoir. The research was conducted to determine the reservoir sedimentation before and after countermeasure through a mathematical model approach. It was done by doing flow and sediment transport simulation using the NCCHE-GUI Program to calculate deposition in the reservoir. Simulation was carried out in existing condition and the condition after the sediment pocket dam was built, with the assumption that discharge was evenly distributed for each month. This simplification method was applied in wich monthly simulation was done for one hour. Simulation result was then multiplied by the number of hours allocated per month to generate the result for one year period. Simulation result indicates that annually sedimentation reduction or net deposition is 30.41% in average after the treatment by sediment pocket dam. It is also identifed from the simulation result that the reduction is relatively small, since simulation was not performed up to the condition where the pocket dam was already filled up by sediment, in which the flushing process has not been optimally simulated.
KAJIAN PENANGANAN BANJIR KALI CILIWUNG DKI JAKARTA DITINJAU DARI ASPEK HIDRO-EKONOMI (STUDI KASUS PADA RUAS CAWANG – PINTU AIR MANGGARAI) Waluyadi, Heriantono; Jayadi, Rachmad; Legono, Djoko
Civil Engineering Forum Teknik Sipil Vol 17, No 3 (2007): SEPTEMBER 2007
Publisher : Civil Engineering Forum Teknik Sipil

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Abstract

Every year in a rainy season, flood inundates several areas along Ciliwung River, especially in the Cawang – Manggarai reach. Flood in this reach is caused by land use changing in upstream area and narrower the river width in the downstream area. Several planning will be implemented to reduce the flood, which are normalization with widening river, revetment and dike construction also diversion channel from Ciliwung River to East Banjir Kanal. To determine the benefit of every flood control structure the integrated and comprehensive considerations is required. The study of performance of flood management planning with hydro-economy approach that considers hydrologic, hydraulic and economic aspect is conducted in this study. The aim of this study is to determine the benefit of every flood control structure. Before determining the benefit of flood control structure, the expected annual damage must be calculated, the calculation is based on discharge-probability of exceedence curve, discharge-stage curve and stage-damage curve. The relation from above three curves will be needed for damage-probability of exceedence curve. As a result from this curve the expected annual damage and the benefit of flood control structure can be determined. The results of analysis are that the benefit of flood control structure for normalization, diversion channel with 2,5 m in width gate, diversion channel with 3,0 m in width gate and diversion channel with 3,5 m in width gate are Rp. 20 billion, Rp. 16.1 billion, Rp. 18.9 billion and Rp. 20.1 billion respectively.
PENGARUH PENGGUNAAN CEBEX 112 TERHADAP SIFAT-SIFAT TEKNIS MORTAR SEMEN DENGAN AGREGAT HALUS BUBUK LIMBAH BATA MERAH Widodo, Haryadi; Satyarno, Iman; Kardiyono T., Kardiyono T.
Civil Engineering Forum Teknik Sipil Vol 19, No 1 (2009): JANUARI 2009
Publisher : Civil Engineering Forum Teknik Sipil

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Abstract

Earthquake in Jogjakarta on 27 May 2006 has caused severe damage to two hundred thousand buildings. Such damage produced a lot of rubbles and, on the other hand, also the need of a huge amount of material to rebuild the buildings. Currently, rubbles, including brick rubbles, are treated only as rubbish and polluting the environment. Anticipation efforts to such problem are required. One of the solution alternatives is a recycling procedure for brick rubbles. Because high water absorption is required, recycling brick rubble is unique that it requires high water cement ratio for mixing the brick masonry wall rubbles. This research attempted to identify the influence of Cebex 112, a mortar plasticizer additive, to cement mortar with brick powder. The mortar workability consistency was measured using the flowtable, ranged from 70% to 90%, showing the easiness of the mortar workability, but without too much bleeding when molded. Sample was made in cube shape of 50mm x 50mm x 50mm. Four ratios of portland cement (pc) to fine aggregate (fa) were used, which were 1pc:4fa, 1pc:6fa, 1pc:8fa and 1pc:10fa. Five ratios of Cebex 112 additive were 0.0%, 0.2%, 0.4%, 0.6% and 0.8% of the Portland cement weight. The samples made were 200 cubes and compression test, absorption test and specific gravity test were given. Results showed that Cebex 112 improved workability and volume due to the reaction between cement and Cebex 112. Admixture is air entrained controlling the microscopic air bubbles which increased the cohesion and provides lubrication for fine aggregate. Cebex 112 decreased the compacting value, improved the absorption and decreased the mortar specific gravity. It also may reduce the cement consumption. This admixture reduced required water at cement ratio 1pc:4fa, but increased at 1pc:6fa, 1pc:8fa and 1pc:10fa. The maximum compaction value was at 1pc:4fa with Cebex 112 content of 0.00% and 17.24 MPa. The minimum was at 1pc:10fa, with Cebex 112 content of 0,6% and 2.67 MPa. The mortar highest specific gravity portion was 1pc:4 fa, 0.0% with 1,71 MPa and the lowest was at 1pc:4fa, with Cebex 112 content of 0.8% and 1.32 MPa. The 24 hours highest absorption was at 1pc:8fa, 0.6% with Cebex 112 content of 29.3% and the lowest was at 1pc:4fa, with Cebex 112 content of 0.0% and 22.3%. These figures show that mortar cement with recycled brick can be used for wall partition and wall interior.
EVALUASI DAN PROGRAM PEMELIHARAAN JEMBATAN DENGAN METODE BRIDGE MANAGEMENT SYSTEM (BMS) (Studi Kasus : Empat Jembatan Propinsi D.I. Yogyakarta) Hariman, Ferry; Christady H., Hary; Triwiyono, Andreas
Civil Engineering Forum Teknik Sipil Vol 17, No 3 (2007): SEPTEMBER 2007
Publisher : Civil Engineering Forum Teknik Sipil

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Abstract

Bridge is among the important part in transportation system. If the bridge damage or collapse it will definitely affect the transportation and distribution of human and goods. Thus it is very important to maintain bridge appropriately. Accordingly Bridge Management System (BMS) is a standard mechanism to evaluate condition and function of the bridge. The BMS also can be used to decide necessary treatment to maintain the bridge in specific circumstances. Further more Computer-Based BMS combined with integrated information system can shows us the priority scale to manage the bridge maintenance. But the visual assessment of bridge is a necessary step to evaluate general conditions of the bridge. This research conducted in four provincial bridge in Yogyakarta, which are Srandakan Bridge, Tinalah Brigde, Kebon Agung Brigde, and Glagah Brigde. Data from some other provincial brigdes were also included as a comparison. The evaluations is carried out by imposing 5 series of questions into the object (the damage element of the brigde). Then each element is weighted by point 1 and 0 according to its damage level from the lowest (level 5) until the highest (level 1), which mean the bridge is completely collapse. Its element or groups of element were weighted from 0 to 5 which 5 represent total score of 5 categories. The categories are Structure(S), Level of Damage (R), Damage Volume (K), Element Function (F) and Damage Affect (P). Assessment on the conditions, technical screening and economical evaluations, for Srandakan Bridge, Tinalah Brigde, Kebon Agung Brigde, and Glagah Brigde, resulting the following conditions: 4 (critical – replacement – priority scale 1), 3 (heavily damage – rehabilitation on waterway – priority scale 36), 3 (heavily damage – rehabilitation on upper structure – priority scale 23). Maintenance cost in the economic evaluation aspect is the estimation cost, not the real cost.
PEMANFAATAN BGA (BUTON GRANULAR ASPHALT) SEBAGAI BAHAN PENGGANTI AGREGAT HALUS PADA CAMPURAN HRS-WC SECARA LABORATORIUM Prawira, Abdi; Suparma, Latif Budi
Civil Engineering Forum Teknik Sipil Vol 18, No 2 (2008): MEI 2008
Publisher : Civil Engineering Forum Teknik Sipil

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Abstract

Along with the improvement and development for keeping the road infrastructure in Indonesia, it is important to be far more comprehends and does testing to exploite nature material. The development of the existing firm layer material technology is very fast, to create technological innovation to efecienti cost, optimalisation of material exploition, expansion of natural material, and environmental friendliness like BGA (Buton Granular Asphalt) in the place of smooth aggregate at mixture HRS-WC. Exploition of BGA for the subsitution of fine aggregates done at this research through volume equivalent, using various comparison of fine aggregates used by BGA are (0%:100%), (25%:75%), (50%:50%) and (100%:0%). Method applied is Marshall and immersion, and determines optimum asphalt content from each various specimen. Specimen at optimum asphalt content was immersed ½ hour (Marshall Standard) and 24 hours, then Marshall test is done. Marshall test and immersion are done to study the influence of various usage of BGA based on its stability values and indexs of retained strength. The result of this research shows optimum asphalt grade of specimen with various BGA of 0%, 25%, 50%, 75% and 100% is 6.37%; 4.85%; 4.49%; 4.15% and 4.55%. At Marshall standard various BGA 0%, 25%, 50%, 75% and 100% stability value of 1340 kgs, 1700 kgs, 1765 kgs, 1589 kgs and 1520 kgs is obtained while index of retained strength is 99.57%; 75.63%; 70.02%; 94.12% and 72.87%. These results show that utilization of BGA can reduce optimum asphalt grade, increase stability values and durability indexes on the HRS-WC mixture. Keywords : HRS-WC, BGA (Buton Granular Asphalt), Marshall.
PERHITUNGAN INDEKS KONDISI BANGUNAN DAN ANALISIS BIAYA PERBAIKAN GEDUNG AKADEMI KEPERAWATAN PANTI RAPIH PASCA GEMPA (Studi Kasus : Bencana Gempa 27 Mei 2006) Suparjo, Iih; Priyosulistyo, Hrc.; Sudarmoko, Sudarmoko
Civil Engineering Forum Teknik Sipil Vol 19, No 1 (2009): JANUARI 2009
Publisher : Civil Engineering Forum Teknik Sipil

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Abstract

Earthquake disaster on May 27, 2006 has forced many buldings to terminate their service due to the severe damage the earthquake caused to the buildings components. Such damage requires renovation in order to restore the building performance and function. This research analyzed the renovation cost analysis for Panti Rapih Nursing Academy in Sleman Regency, Yogyakarta. This research related to building advisability after shaked by earthquacke based on the Condition Index. Analytical Hierarchy Process (AHP) was used for the analysis. Based on this method, the building Condition Index depends on two parameters. The first parameter is building component and sub component weight. The second is the damage degree and quantity, which was obtained by onsite visual assessment. This research included the analysis of renovation cost completed with factors influencing the cost based on the degree of the damage. The renovation cost was calculated by multiplying unit cost and quantity of works, which was obtained from onsite results of the direct survey. The unit cost used refered to official cost in Regency of Sleman, Yogyakarta. Finally, the result obtained were then compared to the cost computed by contractor. Analysis results showed that the Condition Index of Nursing Academy Building was 93,5394%, which was within low damages category. In theory, the cost to restore the building Condition Index (back to 100%) was Rp. 73.160.000,00. This amount was lower than the real cost of Rp 97.680.000,00 calculated by the contractor. Such difference may be due to the different method used when calculating the quantity and unit cost of works.
SISTEM INFORMASI MANAJEMEN JEMBATAN BERBASIS WEB DENGAN METODE BRIDGE CONDITION RATING (Studi Kasus Pengelolaan Jembatan di Kabupaten Garut) Subagio, Gatot; Triwiyono, Andreas; Satyarno, Iman
Civil Engineering Forum Teknik Sipil Vol 18, No 3 (2008): SEPTEMBER 2008
Publisher : Civil Engineering Forum Teknik Sipil

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Abstract

A state progression level can be identified from the infrastructure demand. However, infrastructure projects requires high investment cost, therefore it is recessary to optimally maintain the existing infrastructure facility. Bridge management is required to maintain the bridge function and role, as well as to keep the bridge service period in line with the service period plan by using various efforts to maintain the safety, comfort, and economy in serving the traffic. The bridge management needs a lot of recent information of the bridge inventory and condition. It is required to build accurate and up-to-date information for bridge management completed with DSS (Decision Support System) to make the inventorying result to be easily understood and to determine bridge management priority. Research area in producing this system was located at Garut Regency, West Java by taking 7 bridges as samples, under Bina Marga Public Work management. WEB-based Bridge Management Information System (SIMJWEB) was software built with PHP (PHP Hypertext Preprocessor) and MySQL Database Management System. The bridge condition is visually assessed using the Bridge Condition Rating method of NYSDOT (New York State Department of Transportations). Bridge component is assessed based on Component Rating of 7 as good and 1 as worst. The total Component Rating is multiplied with Weight Factor from each component, and then divided by total Weight Factor resulting from Bridge Condition Rating that reflects the bridge condition. Treatment priority determination is based on Bridge Condition Rating Value. Information on treatment time delay is obtained from estimated bridge service period using IBMS (Interurban Bridge Management System) assumption. SIMJWEB is able to provide prompt information on the inventory, condition, proposal and management priority data, as well as the estimation of bridge service period. Such information helps the bridge manager in making decision. Through internet media, bridge user can actively participate to bridge management in a region by giving idea or following public hearing made by bridge manager. This research results show that Cipancar 1 Bridge has the highest treatment priority at condition rating of 4.874 and requires rehabilitation as the proposed treatment. The lowest priority is Cimanuk Andir bridge at condition rating of 6.587 and requires regular and periodic maintenance as the proposed treatment. By estimating that Cipancar 1 bridge plan period is 50, the Equivalent period is 28.3 years and in 22 years later, the bridge function would not be functioned anymore.
KAJIAN POLA-HEMAT PEMBERIAN AIR IRIGASI Nurrochmad, Fatchan
Civil Engineering Forum Teknik Sipil Vol 17, No 2 (2007): MEI 2007
Publisher : Civil Engineering Forum Teknik Sipil

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Abstract

Paddy is a semiaqutic crop that is also adaptic to water lacking condition such as paddy gogo. As common practice in Indonesia, farmers use excessive amount of irrigation water for their paddy field, hoping to yield maximum amount of harvest. Such practice result in the problem of irrigation water supply due to significant amount of irrigation water requirement. However, paddy harvest is actually influenced by the crop variety, water management, soil nutrient availability and land management. A study of irrigation watering pattern is required to obtain irrigation water saving based on the paddy botanical characteristics related to soil nutrient appropriate management in order to gain optimal harvest. This study applied the pattern of irrigation water supply to five plots of 2x3 m2 model consist of 7x11 points, filled with sandy clay soil. The pattern were continuous flooding (PTM), semi flooding – moisturing – semi flooding (SPS), semi flooding - moisturing (SPP), semi flooding – semi moisturing (SPSP) and flooding - moisturing (PP). Three seeds were planted in each point of PTM and PP pattern, and one seed for each of other pattern. Nutrient were given for every paddy plot at the 8th , 25 th and 40 th day of cultivation. Result of this study showed irrigation water used, which did not include land preparation, and harvest under the PTM, SPS, SPP, SPSP and PP pattern were 5385 l and 3,9 kg, 4290 l and 3,9 kg, 4530 l and 4,3 kg , 4265 l and 3,0 kg and 3915 l and 4,9 kg respectively. PP pattern used the least amount of irrigation water but yielded the filler to yield the optimum result, based on the paddy botanical characteristic and appropriate soil nutrient management. It also saved 33,8 % irrigation water in compare to the conventional practice based on the standard stated by the Ministry of Public Works.
SIMULASI NUMERIS TIGA DIMENSI KANTONG LUMPUR BENDUNG SAPON Nindito, Dwi Anung; Istiarto, Istiarto; Kironoto, Bambang Agus
Civil Engineering Forum Teknik Sipil Vol 18, No 1 (2008): JANUARI 2008
Publisher : Civil Engineering Forum Teknik Sipil

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Abstract

The success factor of a settling basin planning is the trap efficiency. In reality, it is difficult to create a detailed physical model of the sedimentation process. In a more detailed way, sedimentation process phenomena can be formulized by using mathematical equation, for this matter numerical simulation is selected to observe the settling basin performance. A three-dimensional numerical model from SSIIMWin 1.1 is used to carry out this settling basin simulation of the Sapon weir planning. The trap efficiency of the sedimentation process is observed in two different situations: at the time when the settling basin is empty and when it is full. During the empty situation, the velocity and the initial trap efficiency process is measured. When the settling basin is full, inspection is performed to check whether the sedimentation trap process remains effective. The trap efficiency depends on the characteristics of the inflowing sediment (fall velocity of the particle) and the water flow characteristic in the settling basin (flow velocity). Flow velocity simulation is demonstrated using a three-dimensional velocity vectors. Velocity distribution simulation indicates that the value of the horizontal flow velocity component from the upstream to the downstream (augmentation of x/b value) is decreased. The minimum horizontal flow velocity occurs in locations close to the bottom of the bed channel and increasing towards z/h to the surface water. Approaching the wall, the horizontal flow velocity is decreasing and reaches it’s maximum at y/B=0.5. The flow vertical velocity component indicates that approaching the bed channel, the vertical velocity is increasing. The lateral flow velocity component indicates a velocity increase at the horizontal expansion. A three-dimensional vortex occurs on the inlet of the settling basin, due to the vertical expansion. The vortex does not exist in the middle location of the settling basin. Another vortex occurs at the bottom of the channel approaching the downstream of the settling basin. The profile of sediment concentration distribution indicates an increase from the water surface to the bottom (bed channel). The sediment concentration is decreased in quantity to the downstream of the channel. The ratio of the incoming sediment that is deposited (trapped) and inflow the sediment mass entering a settling basin is 69,85 % for the upper 0.06 mm diameter particles. Volume changes of the pond, due to the deposit sediment volume, have lead to a decline in the trap efficiency process. When the volume of the sediments reaches a percentage of 71,84 % of the total pond volume, the settling basin is considered ineffective in performing sedimentation trap process.

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