Journal of the Civil Engineering Forum
Journal of the Civil Engineering Forum (JCEF) is a four-monthly journal on Civil Engineering and Environmental related sciences. The journal was established in 1992 as Forum Teknik Sipil, a six-monthly journal published in Bahasa Indonesia, where the first publication was issued as Volume I/1 - January 1992 under the name of Forum Teknik Sipil.
Articles
225 Documents
<![CDATA[Designing of Flow Mortar Design Mix for Self Compacting Concrete (SCC) with FWC = 0.4 ]]>
<![CDATA[Noor Adi Wibowo]]>
<![CDATA[ Journal of the Civil Engineering Forum Vol. 5 No. 1 (January 2019) ]]>
Publisher : <![CDATA[Department of Civil and Environmental Engineering, Faculty of Engineering, UGM ]]>
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DOI: 10.22146/jcef.41014
<![CDATA[ Self Compacting Concrete (SCC) is an innovation to produce concrete that could flow independently without being compacted. One of the practical methods is by making the mortar mix design first. The purpose of this research was to find optimum value of the flow mortar which will be base in the design of self-compacting concrete; and to find the optimum ratio of the mortar’s absolute volume to the volume of coarse aggregate cavity. The mortar material used type I cement, silica fume content 10% of cement weight, ratio of cement and grade III cement was of 1:1.25; water-cement factor of 0.4; and superplasticizer content of 0.3%, 0.4%, 0.5%, and 0.6% of cement weight. In this design of self-compacting concrete, the ratio of mortar absolute volume to coarse aggregate cavity were of 1.4, 1.6, and 1.8 with size of coarse aggregate of 10-20 mm. This research showed the optimum content of superplasticizer on mortar was of 0.6% which resulted slump flow of 260 mm, and compressive strength of 57.44 MPa. The testing result of SCC showed optimum value on ratio of mortar absolute-volume to coarse aggregate cavity was of 1.8 resulted slump flow of 280 mm, and compressive strength of 65.76 MPa.]]>
<![CDATA[Structural and Non-Structural Assessment of Flood Control in Gunting River, Jombang Regency, East Java Province ]]>
<![CDATA[Supriyono Supriyono]]>
<![CDATA[ Journal of the Civil Engineering Forum Vol. 5 No. 1 (January 2019) ]]>
Publisher : <![CDATA[Department of Civil and Environmental Engineering, Faculty of Engineering, UGM ]]>
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DOI: 10.22146/jcef.41018
<![CDATA[Gunting River which is located in Jombang Regency of East Java Province, Indonesia encounters frequent flood event almost every year. It causes many problems in transportation, health, and economic activity. Thus, flood control which has been implemented in this area needs to evaluate. Design flood was analyzed using HEC-HMS 4.0 Software, while the hydraulic modeling used the unsteady flow simulation model by HEC-RAS 5.0.3 Software. The flood control simulation was conducted with 2 and 10-years return period. The simulation results with the normalization for 2-years (Q2) and 10-years return period (Q10) can effectively accommodate the exceed of flood discharge and lower the depth of runoff depth. The combination of normalization and embankment for can drain the maximum discharge up to 508.75 m3/s, and decrease run-off depth of 2.65 m. The land conservation of 17.8 km2 of the upper area in the watershed has lower the flood depth up to 0.16 m.]]>
<![CDATA[Optimization of Embung Jinggring for Water Resources Development of the Sadar Watershed, Mojokerto, East Java ]]>
<![CDATA[Reja Putra Jaya]]>
<![CDATA[ Journal of the Civil Engineering Forum Vol. 5 No. 1 (January 2019) ]]>
Publisher : <![CDATA[Department of Civil and Environmental Engineering, Faculty of Engineering, UGM ]]>
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DOI: 10.22146/jcef.41133
<![CDATA[Embung is a small reservoir which can reserve water exceeds during the rainy season and utilize it on dry season. It is utilized for many purposes, such as providing water for agricultural purposes, fishery, and household needs. Jinggring Weir which is located at Mojokerto Regency, East Java Province is planned to enhance as embung to be able to provide higher water demand services. An appropriate method of water demand optimization study is important for reservoir water management operation to estimate water supply reliability both used for irrigation as well as domestic water. The Mock method was used to analyze water availability, while irrigation, and domestic water requirement, global water balance, simulation of the reservoir operation was analyzed based on Standard Operating Rule (SOR) method. The linear program method is used to determine an appropriate amount of water released to reach the optimum value of water supply reliability. The result of the simulation of target released using SOR method showed that the embung reliability for irrigation and domestic purpose increased from 81.55% to 100% and 80.09% to 100%, respectively.]]>
<![CDATA[Performance Evaluation and Pounding Effects between KPFT Building Alternative Design for SGLC Building ]]>
<![CDATA[Rusgiyanto Rusgiyanto]]>
<![CDATA[ Journal of the Civil Engineering Forum Vol. 5 No. 1 (January 2019) ]]>
Publisher : <![CDATA[Department of Civil and Environmental Engineering, Faculty of Engineering, UGM ]]>
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DOI: 10.22146/jcef.41163
<![CDATA[Main Office building of the Faculty of Engineering (KPFT) is one of the buildings located within the complex of the Faculty of Engineering, Universitas Gadjah Mada. There is a plan to build a new building adjacent to the KPFT building. The design can interact simultaneously in support of earthquake so that the pounding effect can occur. The pounding effect due to earthquake loads is to improve the quality of KPFT building. This study applies numerical study to determine the effect of adding new structures around the old structure. This research uses 3 structure models, i.e. KPFT building without a wall (SKTD), the new Smart and Green Learning Center (SGLC) structure (SB), and the composite building (SG). This research uses linear time history analysis. There are 3 earthquake records including Superstition Hills-02, Darfield New Zealand, and El Mayor-Cucapah. The results shows story drift from the KPFT building (SKTD model) is reduced after the adjacent building has occurred. The performance level for SKTD models is Life Safety (LS), whereas the performance level for KPFT building after combining with the new structure is Operational (OP). The KPFT building after combining with new structure has a better performance level due to its drift ratio.]]>
<![CDATA[Water Quality Index Performance for River Pollution Control Based on Better Ecological Point of View (A Case Study in Code, Winongo, Gadjah Wong Streams) ]]>
<![CDATA[Sri Puji Saraswati]]>;
<![CDATA[Mochammad Venly Ardion]]>;
<![CDATA[Yul Hendro Widodo]]>;
<![CDATA[Suwarno Hadisusanto]]>
<![CDATA[ Journal of the Civil Engineering Forum Vol. 5 No. 1 (January 2019) ]]>
Publisher : <![CDATA[Department of Civil and Environmental Engineering, Faculty of Engineering, UGM ]]>
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DOI: 10.22146/jcef.41165
<![CDATA[The quality of river water quality monitoring data sometimes can be inaccurate. Evaluation of the effectiveness of water pollution control programs needs good quality data to calculate the Water Quality Index (WQI) with the aim to meet the requirement to protect biodiversity and maintain various water functions. Thirty-five water quality variables from Code, Gadjah Wong, and Winongo rivers were taken as data, conducted by Environmental Agency of Yogyakarta in 2004 – 2015. There were only 19 out of 35 water quality variables having good data after improvement of monitoring data, transformation/standardization and analysis of the significant water quality variables with PCA (Principle Component Analysis) and Factor Analysis (FA). WQIs formula in the three rivers used the same 5 significant variables i.e. EC, DO, COD, NH3N, Total Coliform, and "weighted sum index” as the sub-index aggregation technique, with different sub-index coefficients. Winongo River had the best water quality and Gajah Wong River was the worst. According to the relationship of river water discharge and WQIs index, large discharge during rainy seasons does not always decrease the level of pollution, but it tends to increase the WQIs. More effective ways to improve the stream water quality during dry seasons should further be investigated.]]>
<![CDATA[Investigating the Impact of Airport Relocation on the Transport Network in Special Region of Yogyakarta, Indonesia ]]>
<![CDATA[Andrean Gita Fitrada]]>
<![CDATA[ Journal of the Civil Engineering Forum Vol. 5 No. 2 (May 2019) ]]>
Publisher : <![CDATA[Department of Civil and Environmental Engineering, Faculty of Engineering, UGM ]]>
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DOI: 10.22146/jcef.41575
<![CDATA[Adi Sutjipto International Airport is the airport currently operated in Special Region of Yogyakarta (SRY), located near the city centre area. SRY needs to construct a new airport due to the increase in air passengers. The proposed airport, named New Yogyakarta International Airport (NYIA) is located in the undeveloped area, away from the city centre. This study is aimed to investigate the impact of airport relocation to the road network and to assess several developments of transportation infrastructures to the new airport. The analysis was conducted by developing a transport network model using PTV Visum. The secondary data collected from the local government to develop the transport network model, including the development of origin-destination matrices and forecasting purpose. The scenarios of road infrastructures development and new rail service to the airport in 2025 are then modelled. The results showed that the road infrastructure developed can reduce the number of congested main roads from 9.47% into 5.94%. Rail service to the airport is effective to decrease the traffic congestion at two NYIA roads access and able to increase their average speed from 49.45 and 44.29 km/h into 66.45 and 62.66 km/h. ]]>
<![CDATA[Bridge Displacement Estimation using Tiltmeter Data ]]>
<![CDATA[Raka Bagus Panuntun]]>;
<![CDATA[Akhmad Aminullah]]>;
<![CDATA[Bambang Suhendro]]>;
<![CDATA[Panji Krisna Wardana]]>
<![CDATA[ Journal of the Civil Engineering Forum Vol. 5 No. 2 (May 2019) ]]>
Publisher : <![CDATA[Department of Civil and Environmental Engineering, Faculty of Engineering, UGM ]]>
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DOI: 10.22146/jcef.43670
<![CDATA[Structural Health Monitoring System (SHMS) works as an efficient platform for monitoring health condition and and deterioration of civil structures during long-term service periods. One of the sensors is currently applied to Soekarno Bridge is tiltmeter. Vertical displacement data are often required to reflect the overall response of bridge span, however the Soekarno Bridge does not have any displacement sensor. On the other hand, the displacement sensor is very costly compared to tiltmeter. A method is proposed to estimate bridge displacement using data that is collected through tiltmeter. The method is using interpolation and numerical integration to evaluate the displacement. The result shows that the result obtained from the proposed method is reliable with accuracy of displacement around 5 mm. Some recommendations for further implementation of the sensors are provided.]]>
<![CDATA[Rapid Lava Sand Filtration for Decentralized Produced Water Treatment System in Old Oil Well Wonocolo ]]>
<![CDATA[Ekha Yogafanny]]>;
<![CDATA[Ayu Utami]]>;
<![CDATA[Kristiati E. A.]]>;
<![CDATA[Wibiana W. Nandari]]>
<![CDATA[ Journal of the Civil Engineering Forum Vol. 5 No. 2 (May 2019) ]]>
Publisher : <![CDATA[Department of Civil and Environmental Engineering, Faculty of Engineering, UGM ]]>
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DOI: 10.22146/jcef.43760
<![CDATA[The Cepu Block Oil Field has been traditionally extracted since 2008 by the local community in Wonocolo. The oil well-produced gas and fluids consisted of crude oil and produced water. This oil production activity discharges high amounts of produced water. The fluids have been settled down in the sedimentation tank to gain the crude oil optimally. The remaining fluid called produced water has been discharged to the surface towards the river without any further treatment. This activity led to the deterioration of environmental quality. This study aimed to analyze the performance of produced water treatment by rapid sand filtration by measuring the degree of turbidity removal under the specific condition on a laboratory scale using lava sand. The sedimentation was conducted in 3 hours of retention time following the real field condition of the oil production process by community in one sample well. The rapid sand filtration was conducted by a fixed bed column method with 0.2 cm of grain size. The sedimentation process followed by the rapid sand filtration in produced water treatment yielded the high efficiency of turbidity removal reaching 98.65 %. The rapid sand filter also worked excellently in turbidity removal attaining 96.48 % of efficiency. These results confirmed that the sedimentation already done by the community followed by the rapid sand filtration is promising decentralized technology to be applied in a remote area such as Old Oil Wells Wonocolo regarding turbidity removal.]]>
<![CDATA[Strength Evaluation of Reinforced Concrete Structure for Regular Building due to Earthquake Load Based on Different Soil Types ]]>
<![CDATA[Jonie Tanijaya]]>
<![CDATA[ Journal of the Civil Engineering Forum Vol. 5 No. 2 (May 2019) ]]>
Publisher : <![CDATA[Department of Civil and Environmental Engineering, Faculty of Engineering, UGM ]]>
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DOI: 10.22146/jcef.43789
<![CDATA[Earthquakes are natural events caused by tectonic plate movements and it is unpredictable. Thus, the building design regulation has an important role in ensuring the Earthquake resistant structure. A commonly used method is the response spectrum method. For different soil types, the value of the design spectra may increase or decrease. Therefore this study aims to determine the effect of soil type on the strength of reinforced concrete structures, especially the building behavior and structural internal forces. Analysis results show that the increase of base-shear value of Makassar is about 34% and 103% for medium soil and soft soil condition compared to hard soil. The increase of beam negative moment is about 27% to 39% in soft soil compared to hard soil, while the value is about 8% to 14% in medium soil compared to hard soil. The increase of beam positive moment varies considerably between 8% to 50%. The increasing moment is directly proportional to the required reinforcement area of the beam. Demand capacity ratio of column has also increased about 10% to 35% for medium soil and soft soil compared to hard soil.]]>
<![CDATA[Comparison of the Use of Cement, Gypsum, and Limestone on the Improvement of Clay through Unconfined Compression Test ]]>
<![CDATA[Ika Puji Hastuty]]>
<![CDATA[ Journal of the Civil Engineering Forum Vol. 5 No. 2 (May 2019) ]]>
Publisher : <![CDATA[Department of Civil and Environmental Engineering, Faculty of Engineering, UGM ]]>
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DOI: 10.22146/jcef.43792
<![CDATA[Soil stabilization is an effort to improve soil properties by adding additives in the soil to increase the soil strength and maintain the shear strength of the soil. There are many materials which can be used as stabilizers. The materials used in this study were cement, gypsum, and limestone, then the compressive strength values were compared by using the Unconfined Compression Test (UCT). The mixture combinations used in this study were 1% to 10% of cement, gypsum, and limestone on clay by curing for 14 days. The compressive strength value resulted from the unconfined compression test on the original soil sample was 1.4 kg/cm2. The original soil was classified as moderately sensitive soil because the sensitivity value of the original soil was 2. After being stabilized with various mixtures of cement, gypsum, and limestone, soil stabilization using cement obtained the maximum unconfined compressive strength value is 3.681 kg/cm2 in the mixture of 10%. Similarly, the soil stabilization using limestone and gypsum also obtained its maximum unconfined compressive strength value in the mixture of 10% is 3.307 kg/cm2 and 2.975 kg/cm2, respectively.]]>
