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Jurnal Teknik Sipil Unika Soegijapranata : G-SMART (Geoteknik, Struktur, Manajemen Konstruksi, Sumber Daya Air, Transfortasi)
Published by Universitas Katolik Soegijapranata
ISSN : 26205297     EISSN : 26205297     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Engineering Transportation
Jurnal G - SMART : Jurnal Teknik Sipil Unika Soegijapranata yang meliputi Geoteknik, Struktur, Manajemen Konstruksi, Sumber Daya Air dan Transportasi.
Arjuna Subject : -
Articles 6 Documents
 1 
Search results for , issue "Vol 3, No 1: Juni 2019" : 6 Documents clear
Kajian Kapasitas Sungai Sengkarang Kabupaten Pekalongan Dengan Menggunakan HEC-RAS Johanes Among Timur; Abraham Daksa; Budi Santosa
G-SMART Vol 3, No 1: Juni 2019
Publisher : Universitas Katolik Soegijapranata Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24167/gs.v3i1.1570

Abstract

Flooding was natural disasters the minimize the impact or can be avoided when you know a source of the problem. The increase in discharge flood most affected by the existence of the to watershed ( DAS ), and the form of profile river that could not be accommodate flooding luminance stretch out. The purpose of this research is to evaluate capacity river Sengkarang in order to accommodate flooding luminance stretch out, and give the alternative solution flood. The necessary data in the form of rainfall daily from year 2001 - 2016 in five station rain, namely station Karang Gondang, PS.Kletak station, Karangsari station, Pekalongan station, and Kutosari station. Daily rainfall data is then processed into hourly rain data using Mononobe method. Then from the parameters that have been specified in the insert into HEC-HMS software. The result of HEC-HMS this is discharge flood simulations with the period repeated 2 annual of 322.8 m3 / s, the period repeated 5 annual of 582.6 m3 / s, the period repeated of 10 years of 765.1 m3 / s, the period repeated 25 annual of 1034.3 m3 / s, the period repeated 50 annual of 1148.9 m3 / s. after obtained discharge simulations with the period repeated certain then afterward did the simulation profile river sengkarang by using HEC-RAS software. This permodelan it can be found in which a part is happened flood. Therefore done solution altermatif of normalization river.
Analisis Terhadap Kualitas Air Sungai Kaligarang sebagai Sumber Air Baku PDAM Natasha Cindy Kardia Etnovanese; Tiyas Matilda Aprillia; Djoko Suwarno; Budi Setiyadi
G-SMART Vol 3, No 1: Juni 2019
Publisher : Universitas Katolik Soegijapranata Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24167/gs.v3i1.1772

Abstract

The usage of water should be wisely. Water which most used by the community is river water. Kaligarang river water is used for irrigation, to wash the clothes, cleanse sewage. and as the basic source of PDAM Tirta Moedal Semarang. This observation method is literature study, collect data by interview and take the water sample, and analysis the water quality. The observation of water quality is done to search for the cause of Kaligarang river pollution so that we know how to neutralize the river basic source in PDAM Tirta Moedal Semarang. The observation is done in the draught season because at this time the content of pollution is higher. The water sample is taken from the river junction, back of PDAM TM intake, and at the estuary. The quality criteria of water is based on PPRI number 82, 2001. The result shows that water at every spot has parameter which higher. Has high value parameter which is more than the limitation value which is different and the pollutant is much in the muara. The penetrate used by PDAM Tirta Moedal is chlorin and tawas, and the usage doesn not influent the cost of production nor distribution but it causes the production process stop, so that the people should have water containers at their homes.
Kajian Kuat Lentur Balok Beton Bertulang Komposit Dika Ananditya; Adri Praditya; David Widianto; Hermawan .
G-SMART Vol 3, No 1: Juni 2019
Publisher : Universitas Katolik Soegijapranata Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24167/gs.v3i1.1607

Abstract

Demand for improvement of age concrete performance, durability and assessment of existing condition building with reinforced concrete structure have tendency to increase. The selection of appropriate methods taking into the economic aspects provides a rebuilt or retrofit option. Efforts that can be done in order to retrofit the beam structure, can be done in various ways, one of which is the use of chemical anchor. Repair using chemical anchor involves two elements, namely chemical HILTI HIT-RE 500 V3 and anchor. Both elements combine the existing beam with a new block to be a single composite beam. The use of HILTI HIT-RE 500 V3 can guarantee the monolithic nature of the structure components and transfer the voltage even though there is little cracking. The use of anchorage in concrete can increase the load that can be supported by 5.87% -8.91% and will increase with the length of the burial.This study aims to study the strength of reinforced concrete bone beam that is improved by chemical anchor method. The scope used is a beam-shaped specimen measuring 15 cm x 15 cm x 60 cm, monolith beam 15 cm x 30 cm x 60 cm, anchor steel bone diameter 13 mm, 24.9 MPa concrete (K-300) and chemical anchor HILTI HIT-RE 500 V3.The test results show that concrete composite increases the maximum acceptable load three times between 30 cm thick composite beam and 15 cm thick single beam. The maximum load of 30 cm thick monolith beam has increased by 1,5 times compared to 30 cm thick composite beam. The average maximum load that can be supported by a single 15 cm thick beam is 6.515 kg, 30 cm thick concrete monoliths 12.800 kg, and 30 cm thick concrete block is 19.267 kg.
Pengaruh Penambahan Semen Tipe I Terhadap Nilai Kuat Geser Tanah Krisna Dwiyana Soehendro; Roma Kusuma; Daniel Hartanto
G-SMART Vol 3, No 1: Juni 2019
Publisher : Universitas Katolik Soegijapranata Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24167/gs.v3i1.1634

Abstract

The type of soil that is quite often found in Semarang City is expansive soil. Expansive soil is some types of clay soil which has high value of shrinkage and plasticity. One of the common problem from this charateristic is found at Jalan Taman Verbena, Kelurahan Sadeng, Kecamatan Gunungpati, Semarang. The problem that usually occur are broken walls and cracks, and also bumpy floors. One of the solution that the writer give to increase the value of expansive soil shear strength is to conduct research on adding cement with different percentage as the additiver. In this research, the writer use type I cement with the percentage of 0%, 5%, 10%, 15%, and 20% from the weight of dry soil. The reasearch that the writer do are mineralogi test, index properties test, atterberg limit test, sieve analysis test, standard proctor test, swelling test and direct shear test. Based on the direct shear test, the best value of cohesion was obtained at 10% of cement adding on the soil sample with 28 days of curing with the value 3,75 kg/cm2, while the best value of shear angle was obtained at 20% of cement adding with 28 days of curing with the value 88,00°. The conclusion that the writer can be conclude is cement has good effect in increasing the value of expansive soil shear strength.
Pengaruh Substitusi Sebagian Agregat Halus Dengan Abu Batu Dan Penambahan Fly Ash Terhadap Kuat Tekan Beton Heronimus Lumenta; Stefanus Tri Bintoro; David Widianto; Widija Suseno
G-SMART Vol 3, No 1: Juni 2019
Publisher : Universitas Katolik Soegijapranata Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24167/gs.v3i1.1765

Abstract

The purpose of this research is to determine concrete compressive strengths with screenings variation of 0%, 25%, 50%, and 75% by addition the weight of fine aggregate (sand) and fly ash 15% by the weight of cement. The background of this research is increasing demand for concrete and the limited availability of concrete substances. Therefore innovation is needed to maintain the availability of concrete constituent materials and also to improve the quality of concrete. Up until now a lot of researches have been carried out regarding of substitute materials or added materials that can be substituted in making concrete. Based on this background the writer chose one of the added ingredients that can improve the quality (compressive strength) of concrete, namely fly ash. Fly ash produced from the remaining combustion of coal in the Steam Power Plant (PLTU).  While for substitution materials, the writer used the screenings that substituted by sand. In this study the writer used four variations of concrete with a ratio of 0% screenings : 100% sand, 25% screenings  : 75% sand, 50% screenings  : 50% sand, 75% screenings: 25% sand. Every variant was added with fly ash as much as 15% of the weight of cement.The result of this research was indicated that variations 25% screenings, 75% sand plus  fly ash of the weight of cement that having the highest quality of concrete among the other variations were as much as 298,95 kg/cm2 at the age of 7 days; 403,23 kg/cm2 at the age of 28 days; and 456,53 kg/cm2 at the age of 42 days. This was because means of air vents was in concrete filled by granules of screening so that the concrete became denser and made concrete strong press was increased.
Studi Penerapan Area Traffic Control System (ATCS) Di Beberapa Simpang Kota Semarang Descraredo Henky Sunyoto; Febriansyah Ramadhan; Rudatin Ruktiningsih
G-SMART Vol 3, No 1: Juni 2019
Publisher : Universitas Katolik Soegijapranata Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24167/gs.v3i1.1766

Abstract

The increasing of transportation needs in big cities had almost a same problem, which is congestion on roads especially at the crossroads. Semarang is one of the cities located at a strategic point. Therefore, Area Traffic Control System came as a solution. Area Traffic Control System (ATCS) is a system that controlling road traffic intersections by using traffic lights where the setting of traffic light at each intersection was coordinated, so the road users could get a minimum delay. Government of Semarang plans to install  ATCS at the intersection of PRPP and Madukoro. The location of study is intersections of PRPP and Madukoro, where the intersection is a cross-city connecting route that is crossed by heavy and light vehicles and vehicles that going to and out from A. Yani airport. The method that used in this study is a survey method, including surveying traffic volume, queue length, delays, and light phase. The results then processed using a formula from the Indonesian Road Capacity Guidelines (PKJI'14). The results of this study is alternative coordination with a cycle time is 244 seconds for each intersection. Intersection I starts at 0 seconds, intersection II starts at 90 seconds. The degree of saturation obtained for the north and south PRPP intersections is 0. 28, for the east is 0. 36, for the west is 0. 42, while for intersection of north Madukoro  is 0. 35 , for the south is 0. 36, for the east is 0. 39, and for the west is 0. 45 So that the application of the Area Traffic Control System (ATCS) can have a positive resolution for reducing congestion and  get good traffic flow in the intersections of Madukoro and PRPP.

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