An Analysis of Static Load Test on Sinngle Square Pile of 50 x 50 cm2 Using Finite Element Method in Multy-Storey Building Project , Pluit, North Jakarta

Planning a foundation for a high building and carrying a large construction burden, must be carried out with a correct, thorough and comprehensive analysis, so that a foundation design is able to carry the burdens that works on it and can carry the loads it receives to ground beneath it safely. This study analyzed the capacity of bearing capacity and the settlement of the hydraulic stressed pile foundation of prestressed concrete square pile of 50 x 50 cm2 in cross section of single pile or group pile. The research used empirical method, finite element method program and compared the results with the interpretation of axial static loading test on the Multy-Storey Building Project in Pluit, North Jakarta. The analysis used soil investigation and laboratory study and used 2D and 3D finite element methods by Mohr-Coulomb and Soft soils models. The result of the analysis on the ultimate bearing capacity of hydraulic stressed pile foundation with empirical method of Meyerhof gave the highest value using SPT data at DB1 borelog point of 655.23 tons, and the lowest was the result of interpretation of Loading Test by Davisson’s method of 260.00 tons. The ultimate bearing capacity required by ASTM D1143-81 (1989) for the Static Axial Loading Test is 300 tons (200% of working load), while the interpretation of the Davisson’s Loading Test method (260.00 tons), Chin (267,86 tons) and Mazurkiewicz (267.00 tons), none of which have fulfilled the requirements for carrying 150 tons of working load. The lateral bearing capacity of Broms method was 16,14 tons which was the strength of the pile material against lateral loads. Whereas for the bearing capacity of the group pile ( 6 points in one pilecap) the lowest efficiency of 0,734 from the Converse-Labarre Equation and the highest efficiency of 0,805 from the Los Angeles Group Action Equation was obtained. For 200% of the planning load of 150 tons, that is 300 tons, the settlement of the single pile which occurred from 2D finite element method program were 18,00 mm and 15,63 mm for 3D while the results of the Loading Test was 15,00 mm. The results of the analysis of Loading Test settlement was more realible.

An Approach of Travel Time of Flood Peaks and Runoff Model towards Low Impact Development

The most crucial point for the planning of the city should be considered flooding conditions. In manipulating the length of the channel, of course also manages the direction of the stream, so that the size of the catchment area in the area will be different. The characteristics of surface runoff of urban drainage systems are essential to determine the effects of runoff reduction towards Low Impact Development (LID). In this study, to make modelling of stormwater runoff characteristics in a city can be analysed by using the Stormwater Management Model (SWMM). This research is to explain the method of approaching travel time of flood peaks and runoff in a drainage network system that needs a rainfall-runoff model, EPA SWMM model that shown flood peak in the return period 5-yr and 10-yr, and need representatives to the graph of travel time and runoff. The result shows that the channel only accommodates return period of flood 5-yr, not the 10-yr. The drainage network system consists of minor drainage and major drainage (river) that can be simulated to reduce the runoff. The approach influenced by the direction of flow and the roughness. These parameters are the vital point to manage the travel time of peak floods. The, by redesign and update the capacity of the channel can reduce the overflow over the nodes (junctions).

The Instensity Measurement And Noise Mapping in Fatty Acid Plant Area At PT. XYZ

PT. XYZ is a factory engaged in processing of palm oil derivatives in producing a fatty acid. The machines used in the processing process at PT. Permata Hijau Palm Oleo KIM II Mabar generate the noise. This research aimed to find out the existing noise level and noise mapping, also the proposal of noise control on the production floor. Then, the data collection method conducted through observation using the equivalent noise level (Leq) method and noise mapping was through surfer 14. The data collection conducted in 16 points on the production floor. Furthermore, the result and noise distribution pattern showed that the high noise level was in several points, those were point 5 (85.77); point 6 (86.82); point 7 (86.33), point 8 (88.18); point 10 (86.96); point 13 (86.85); point 14 (87.67). The allowed threshold value refers to the Decree of the Minister of Manpower and Transmigration No.Per.13/MEN/X/2011 is 85 dB. Thus, the company needs to perform noise control such as barrier usage, regularly and scheduled machine maintenance to prevent and decrease the effect of the noise

An Availability Analysis of Fresh Fruit Bunches (FFB) by the method of the Food Supply Chain Network (FSCN) PT. XYZ

XYZ is a manufacturing company that is engaged in oil palm processing into Crude Palm Oil (CPO) and Crude Palm Kernel Oil (CPKO). Supply chain structure model adopted in PT. XYZ is the Mass Balance. Mass Balance is a supply chain model that allows a claim to be transferred from one certified palm oil products to other products either through physical blending or administratively under tightly controlled circumstances. non-fulfillment of processing capacity due to lack of supply of fruit coming into the plant from the garden supplier FFB does not reach the target supply to meet the plant's capacity, while at the time of supply of the third party can not meet that capacity. This will increase the cost per palm product so that profits earned by the company to be reduced because production capacity is not the same with a capacity / installed capacity owned by the manufacturer. Analysis of the results using the Food Supply Chain Network (FSCN) that causes a decrease in the availability of fresh fruit bunches (FFB) is influenced by the decreasing productivity of the garden as a supply based, which has been aged more than 20 years. Of the six aspects FSCN method, one aspect observed is the development of the supply chain and improvements to the supply-based to do the replanting of consideration to yield potential.

Rice Bran Oil Extraction as Trioxolane Raw Material

Rice bran is a byproduct of rice processing which was generally used for animal feed. Rice bran oil could be used as raw material in the fields of pharmaceuticals, cosmetics, and food oil. The purpose of this research is to extract rice bran into oil as a raw material for Trioxolane using n-Hexane solvent and purify the oil by adsorption using bentonite. Trioxolent compounds were obtained from ozonated fatty acids. Variable extraction time 2, 3 and 4 hours and use of bentonite 2.5, 5 and 7.5 grams from 10 ml of crude rice bran oil. The results obtained an oil yield of each variable extraction time 2, 3, and 4 hours respectively - the value is 8.4, 10, 11%. The optimum operating conditions were obtained by extraction time of 4 hours and refining 75% bentonite. The characteristics of rice bran oil has a moisture content of 8%, an acidic value of 67% mg NaOH/g sample, a peroxide number of 21 mgrek/g sample, an iod number of 46 mgI2 / g sample and the results of fatty acid analysis using GCMS is 33.5 % oleic acid, 24.8% Linoleic acid, 32.6% Palmitic acid.

Production Optimization Design in Supply Chain Crude Palm Oil with Genetic Algorithm Method

Indonesia is the world's largest producer of crude palm oil (CPO). At peak harvest conditions, frequent accumulation of fresh fruit bunches (FFB) due to abundant raw materials. Based on data from one palm oil mill in the province of North Sumatra, the percentage of FFB stays in the field overnight, which is 41% of the total FFB though, on the one hand FFB that has been harvested must be processed immediately because it can affect the quality of oil to be produced. Besides that, the factors of production and storage processes are also very influential on the quality of CPO. The imbalance in production planning shows that production planning is not yet optimal in the CPO supply chain so that a production optimization design is needed in the CPO supply chain. The genetic algorithm was chosen in the completion of the optimization model because of the complex characteristics of the CPO supply chain. The purpose of this research is to optimize the palm oil supply chain system to minimize production costs. This method shows that the optimum production yield for the third quarter of 2017 is 12,202,285 kg. With the proposed system an increase in the percentage of CPO production was obtained by 8.34% compared to the actual system.

Pushover Experiment of Portal Structure with Brick Wall without and with Anchor for Non-Engineered Building

Based on the findings in almost all earthquakes that hit Indonesia, the damaged and collapsed buildings were simple houses built spontaneously (non engineered building), where buildings are built based on practical experience without structural calculations. One form of damage to non-structural components and structures is the relationship between columns and brick walls, where cracks and separation between columns and walls occur due to no anchor. So the design of buildings in the future is safe from the dangers of earthquakes. For earthquakes that are not too large, the building is likely to remain standing with little damage. However, to anticipate a strong earthquake and reduce the adverse effects, the building of a walled wall must be built according to the provisions of earthquake-resistant building construction by providing reinforcement in certain parts such as mounting anchors from column to wall. To find out how much influence from the installation of the anchor from the column to the brick wall, an experimental study was carried out on the walls completed with a foundation, sloof, column and beam. There were 2 specimens, namely specimen that uses the anchor and do not use anchor, so it is expected to know the behavior of mounting anchors. From the test results obtained that a pushover load of 7540 kg and a displacement of 56.5 mm for specimens using anchor while for specimens that did not use anchor had pushover 5666 kg and a displacement of 48 mm. The conclusion is the installation of anchors between column and brick wall can increase

The Structural Performance Analysis of Base-Isolated Hospital Buildings with Analysis Modal (Case Study: General Hospital in Labuhan Batu Utara Regency Area)

The development of earthquake analysis towards structures is required to prevent damages and loss in buildings due to earthquakes. The base isolation system is a simple design approach for earthquake-resistant buildings to protect the structures and components from the risk of earthquake damages by using the concept of reducing earthquake forces. This research aims to analyze the performance of a general hospital building in Labura Regency area in order to know the safety of the building in terms of period, frequency, base shear force, displacement and earthquake force, used the base isolators and without the base isolators. The method used is response-spectrum dynamic analysis by ETABS v2016 program. From the calculation of structural analysis, the application of base isolation is able to build up the period of the structure, therefore, the maximum acceleration of earthquakes can be reduced at certain period. There is an average increase by 48.21% of the structural period compared to non-isolated base structure, and the frequency that occurs in structures using base isolators is smaller than without base isolators. The friction force obtained is smaller compared to the structures without dampers. Base-isolated building structures observed have bigger displacement than non-base isolated structures. The average rise of the building displacement is 27.14% at x and 2.74% at y directions. In base-isolated structures, earthquake forces are reduced averagely by 57.51% at x and 82.73% at y directions. The analysis of structural performance, General Hospital in Labura Regency is categorized to Immediate Occupancy (IO) in which the building structures are safe with no significant risk of fatalities due to structural failures, there are no any significant damages and the building can be used and functioned/operated again immediately.

Effects of TESPT-Silane Coupling Agent on Torque Properties and Degree of Filler Dispersion of Silica Filled Natural Rubber and Epoxidized Natural Rubbers Compounds

The effect of the addition of a bis(triethoxysilylpropyl) tetra sulphide or TESPT-silane coupling agent on torque properties and degree of filler dispersion of silica-filled compounds of natural rubber (NR), epoxidized natural rubbers with 25% mole of epoxidation (ENR 25) and epoxidized natural rubbers with 50% mole of epoxidation (ENR 50) were investigated. All the rubbers were filled by silica filler at a fixed loading (30.0 parts per hundred rubber, phr) and the TESPT was added to each silica-filled rubbers compounds at 1.0phr. It was found that TESPT affected the torque properties of all the silica-filled rubbers compounds. The TESPT decreased the minimum torque of NR system but increased the minimum torque of ENRs systems and maximum and torque differences of the all rubbers systems. The minimum torque was decreased from 0.61 to 0.53 dN.m for NR; were increased from 0.23 to 0.49 dN.m for ENR 25 and from 0.07 to 0.34 dN.m for ENR 50.It was also found that the TESPT acted as an internal plasticizer for NR which improved the degree of silica dispersion. Presumably, for the ENRs, the TESPT acted as an additional cross linker with a more pronouncedly which poorer the degree of silica dispersion.

A Study on the Road Conditions Assessment Obtained from International Roughness Index (IRI): Roughometer Vs Hawkeye

Study is aimed to find out what is the representation of IRI (International Roughness Index) from the Roughometer results if it was used as substitute of IRI from the Hawkeye results on the road conditions assessment, which is the hawkeye device is included in the Class I category of roughness measurement devices, while the Roughometer is in the Class III. The Student’s t statistical operation is used to find the representation of IRI from the Roughometer results as substitute of IRI from the Hawkeye results. It is determined by analyzing the comparison of the mean values of both measurement results. The study was conducted on three national road sections in North Sumatra Province, namely: Bts. Kota Binjai – Bts. Kota Medan road with a length of 7,300 meters, Bts. Kota Tebing Tinggi – Bts. Kabupaten Simalungun road with a length of 18,800 meters, and Bts. Kabupaten Simalungun/Bts. Kabupaten Sergai road with a length of 15,000 meters. The IRI values were measured by using Roughometer and Hawkeye devices. The measurements were carried out with the survey team from the Center for Implementation of the National Road II Medan, which was also the facilitators in providing the survey equipment, Roughometer and Hawkeye. The statistical test results that the IRI values from the Roughometer measurement results were significantly different from the IRI values from the Hawkeye measurement results (Ho was rejected) because the Student’s t-test results for the three road sections showed that tcount > tcritical and p-value < 0.05. And the assessment of the road functional conditions using Roughometer showed the same results on one road section but worse results on the other two road sections compared to assessment of the functional conditions with Hawkeye. Based on the analysis results, it can be concluded that the IRI values from Roughometer were more conservative in representing the functional conditions of the road when used as a substitute for the IRI values from Hawkeye.