Semesta Teknika最新文献_第10页

Evaluasi Beton Bertulang terhadap Perlakuan Panas (Tinjauan pada Tegangan Tarik dan Modulus Elastis Tulangan Baja Lateral) 针对热行为的骨Beton评估

Semesta Teknika Pub Date : 2018-08-28 DOI: 10.18196/st.v16i2.4908

Riswanto Riswanto, As’at Pujianto, M. H. Zulfiar

{"title":"Evaluasi Beton Bertulang terhadap Perlakuan Panas (Tinjauan pada Tegangan Tarik dan Modulus Elastis Tulangan Baja Lateral)","authors":"Riswanto Riswanto, As’at Pujianto, M. H. Zulfiar","doi":"10.18196/st.v16i2.4908","DOIUrl":"https://doi.org/10.18196/st.v16i2.4908","url":null,"abstract":"Fires phenomena have made demands to a building planner to protect, evaluate, and predict the performance of a building after a fires process. The main attention was given to the type of material, in this case, the reinforced concrete that used as a structural element, which due to heating and cooling cycles are alternating, and then the elements of reinforced concrete structures undergo a phase change both in the physical and chemical. This research related to the evaluation of reinforced concrete quality with a focus on heat treatment and reviews tensile stress and elastic modulus of the steel reinforcement. Specimens used in this study was a model of the reinforced concrete beam with a concrete cover types K250 and K300, 7.5 mm of rebar diameter and 2 cm of concrete cover thickness. Heat testing performed after 28 days of treatment with closed combustion in the furnace (heat chamber) without loading at a temperature of 1000ºC for 10 hours, holding time for 1 hour, and slows cooling for 10 hours. In normal specimens, the tensile test results show an equivalent stress value of 324.12 MPa. In specimens heat treatment with a concrete cover of K250, the tensile stress value was 259.52 MPa, while in the K300 was 263.76 MPa. Optimum tensile stress value in normal specimens was 568.62 MPa, and in specimens with heat treatment and with the K250 concrete cover was 473.74 MPa and amounted to 494.41 MPa for K300. The value of tensile fracture stress in normal specimens amounted to 552.52 MPa, and in specimens with heat treatment and with the K250 concrete cover amounted to 461.52 MPa and amounted to 465.24 MPa for K300. Elastic modulus values for normal specimen was 1,612,963.61 kg/cm2, while in specimen heat treatment with the K250 concrete cover was 1,287,888.05 kg/cm2 and was 1,311,545.42 kg/cm2 for K300.","PeriodicalId":33667,"journal":{"name":"Semesta Teknika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44560304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pengaruh Penggunaan Bambu Sebagai Pengganti Agregat Split terhadap Kuat Tekan Beton Ringan 用竹子来代替模子和轻混凝土对压的影响

Semesta Teknika Pub Date : 2016-03-31 DOI: 10.18196/st.v15i2.1357

As’at Pujianto, M. Tajuddin

引用次数: 0

Analisis Kinerja Ruas Jalan HOS Cokroaminoto Akibat Perkembangan Lalu Lintas di Yogyakarta 由于日惹的交通状况，鲁阿斯街何科罗斯马里诺托的性能分析

Semesta Teknika Pub Date : 2016-03-31 DOI: 10.18196/st.v15i2.1360

R. Gustav

{"title":"Analisis Kinerja Ruas Jalan HOS Cokroaminoto Akibat Perkembangan Lalu Lintas di Yogyakarta","authors":"R. Gustav","doi":"10.18196/st.v15i2.1360","DOIUrl":"https://doi.org/10.18196/st.v15i2.1360","url":null,"abstract":"Yogyakarta is a region with high traffic. It also has high population density. These matters have been predicted to cause transportation problems. HOS Cokroaminoto Street, as a road in urban city center, has the potential to have such problems. Analysis and evaluation needs to be done to maintain good performance of the road. Manual Kapasitas Jalan Indonesia 1997 is used to measure the performance of traffic which includes operational analysis and the planning of urban roads. Level of Service Criteria (LSC) is determined based on the regulation of The Ministry of Transportation KM No. 14 of 2006. Traffic data had been obtained by counting the number of vehicles for 3 days on the busy-hour. These data were presented in tabular data of the vehicle, and then the performance of the traffic was analyzed. For urban roads, form UR-1, UR-2, and UR-3 (MKJI 1997) are used. Based on the results of the performance analysis on HOS Cokroaminoto Street with MKJI 1997 method, in 2010, the degree of saturation (DS) of the road is 0.43. It means that, in LSC term, this road is in level B. It is predicted that, in 2016-2020, this road will not satisfy the eligibility standard (DS 0.75). This shows that the performance improvement of HOS Cokroaminoto Street is required. From the alternative solutions, the scenario of side friction reduction is more rational to maintain the eligibility and performance of HOS Cokroaminoto Street.","PeriodicalId":33667,"journal":{"name":"Semesta Teknika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67554571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unjuk Kerja Resapan Air Hujan 正在下雨

Semesta Teknika Pub Date : 2016-03-31 DOI: 10.18196/st.v15i2.1325

Burhan Barid, Prasetyo Nugroho, A. Huda

{"title":"Unjuk Kerja Resapan Air Hujan","authors":"Burhan Barid, Prasetyo Nugroho, A. Huda","doi":"10.18196/st.v15i2.1325","DOIUrl":"https://doi.org/10.18196/st.v15i2.1325","url":null,"abstract":"Nowadays, the environmental problems that often occur are flood in wet season and drought in dry season. This happens because the rainwater runoff cannot seep into the ground well and the ground water level is decreased. Excessive surface runoff can be reduced by a simple water infiltration wells on the land. To determine the efficiency of absorption well, a model was created using infiltration rainfall simulator unit to create the condition of heavy rain. This study aims to analyze the relationship between times and several parameters: soil moisture, the changes in the groundwater table, the runoff time, the volume of rainfall infiltration, and to determine the reliability of models with changes in water table. The study was conducted using the infiltration model unit which was made of steel plate with a size of 170x170x200 cm3. This model is divided into three spaces. The first space, which its size is 150x150x200 cm3, has two tests. The first one is labeled as A test and filled with medium silt with the elevation of -150 cm. The B test is filled with medium clay with the elevation of -125 cm. The second space, with the dimension of 170x20x200 cm3, is used to control the ground water level. The third space is used for measuring absorption capability and has dimension of 30x30x100 cm3. This model has nine holes on each side for measuring soil moisture and the 12th hole underneath is used for measuring changes in ground water level. After the artificial rain descended for 120 minutes, soil moisture and ground water level changes measured in every 10 minutes.","PeriodicalId":33667,"journal":{"name":"Semesta Teknika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67553999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pengaruh Penggunaan Abu Sekam Padi sebagai Bahan Pengisi pada Campuran Hot Rolled Asphalt terhadap Sifat Uji Marshall 防烟垫填料在热轧沥青混合料中的应用马歇尔试验性能

Semesta Teknika Pub Date : 2016-03-31 DOI: 10.18196/st.v15i2.1321

S. A. P. Rosyidi

引用次数: 1

Analisis Volume, Kecepatan, dan Kepadatan Lalu Lintas dengan Metode Greenshields dan Greenberg 用格林希尔兹和格林伯格方法分析体积、速度和交通密度

Semesta Teknika Pub Date : 2016-03-31 DOI: 10.18196/st.v15i2.1361

W. Widodo, Nur Wicaksono, Harwin Harwin

引用次数: 8

Aplikasi Metode Nilai Hasil (Earned Value Method) pada Sistem Pengendalian Proyek 项目控制系统的结果价值方法应用

Semesta Teknika Pub Date : 2016-03-31 DOI: 10.18196/st.v15i2.1359

Siti Yuliani Pujihastuti, Mandiyo Priyo

引用次数: 0

Pengaruh Penambahan Parutan Karet Ban Gradasi Tipe 2 terhadap Parameter Marshall pada Campuran Hot Rolled Sheet Wearing Course 热轧薄板磨耗层混合料马歇尔参数的2型拉制板加法器

Semesta Teknika Pub Date : 2016-03-31 DOI: 10.18196/st.v15i2.1358

Sentot Hardwiyono

{"title":"Pengaruh Penambahan Parutan Karet Ban Gradasi Tipe 2 terhadap Parameter Marshall pada Campuran Hot Rolled Sheet Wearing Course","authors":"Sentot Hardwiyono","doi":"10.18196/st.v15i2.1358","DOIUrl":"https://doi.org/10.18196/st.v15i2.1358","url":null,"abstract":"The provision of road infrastructure cannot be separated with the pavement construction itself. One of the materials used is asphalt that is really related to natural resources. Using asphalt is not durable in many cases because of the oxidation process, mainly due to heating. This can lead the road (flexible pavement) to fast deformation, including cracking. Nowadays, there are many additives to improve the asphalt quality. One of them is adding rubber to the asphalt which can give more durability under high temperatures, increase its adhesion, and improve its flexibility. This study used the additives in the form of shredded rubber with the content of 20%, 21%, and 22% of the total mass of asphalt. The shredded rubber was mixed with the asphalt, and then heated at least 45 minutes before mixing it with the aggregates. The HRS WC mixture with the tire rubber was compared in term of optimum asphalt content and Marshall results. The results show that adding shredded tire rubber in HRS WC mixture can decrease the flow. This shows that the addition of shredded rubber can decrease of the sample deformation, so that the mix will not be too plastic and easily deformed under the loading. It can also increase the VIM and decrease the VFA, so that it can reduce the bleeding possibility.","PeriodicalId":33667,"journal":{"name":"Semesta Teknika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67554777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Studi Kelayakan Investasi Proyek Perumahan pada Proyek Pembangunan Perumahan Aura Tirta Graha Banjarnegara 环境投资项目研究住宅开发项目的氛围

Semesta Teknika Pub Date : 2016-03-31 DOI: 10.18196/st.v15i2.1324

Mandiyo Priyo

引用次数: 1

Alat Perangkap Tikus Elektronis 电子鼠标捕获工具

Semesta Teknika Pub Date : 2016-03-05 DOI: 10.18196/st.v8i2.907

Alfi Arianto, A. FathulQodir

引用次数: 1