Pub Date : 2022-12-01DOI: 10.2478/sspjce-2022-0014
M. Oualit, A. Irekti, B. Hami
Abstract The use of superplasticizers in concrete production has become a common practice, especially when a high fluidity is required. On the other hand, the risk of segregation and the stability of these mixtures is ensured by the incorporation of a large volume of fine mineral additions. The present investigation is devoted to the study of the influence of three types of superplasticizers of different chemical compositions, namely: Combined Synthetic Polymers (CSP), Poly-Carboxylate Ether (PCE), and Modified Poly-Carboxylate Ether (MPCE) on the rheological behavior of self-compacting concrete (SCC) as well as on the mechanical properties at 3, 7, and 28 days of curing. Natural pozzolana (NP) and ground granulated blast furnace slag (GGBFS) were used as additions to stabilize the mixtures. The results revealed that the ether-based superplasticizer PCE gave the best workability and mechanical performance with low amounts (high efficiency). In addition, blast furnace slag promotes the obtaining of better properties whether in the fresh or hardened state compared to natural pozzolana.
{"title":"Effectiveness Assessment of Superplasticizer Admixtures: Case of Self-compacting Concrete Reinforced with Fine Mineral Fillers","authors":"M. Oualit, A. Irekti, B. Hami","doi":"10.2478/sspjce-2022-0014","DOIUrl":"https://doi.org/10.2478/sspjce-2022-0014","url":null,"abstract":"Abstract The use of superplasticizers in concrete production has become a common practice, especially when a high fluidity is required. On the other hand, the risk of segregation and the stability of these mixtures is ensured by the incorporation of a large volume of fine mineral additions. The present investigation is devoted to the study of the influence of three types of superplasticizers of different chemical compositions, namely: Combined Synthetic Polymers (CSP), Poly-Carboxylate Ether (PCE), and Modified Poly-Carboxylate Ether (MPCE) on the rheological behavior of self-compacting concrete (SCC) as well as on the mechanical properties at 3, 7, and 28 days of curing. Natural pozzolana (NP) and ground granulated blast furnace slag (GGBFS) were used as additions to stabilize the mixtures. The results revealed that the ether-based superplasticizer PCE gave the best workability and mechanical performance with low amounts (high efficiency). In addition, blast furnace slag promotes the obtaining of better properties whether in the fresh or hardened state compared to natural pozzolana.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"1 1","pages":"1 - 15"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80483396","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}
Pub Date : 2022-12-01DOI: 10.2478/sspjce-2022-0001
D. Katunský, M. Vertaľ, Silvia Zozuláková, E. Dolníková, K. Hutkai
Abstract The presented study deals with the space located in the attic of an older building after reconstruction. Originally, the attic space was not used, as it did not have sufficient headroom. The reconstruction was designed in such a way that the entire original pitched roof was gradually raised by 1.2 meters in parts, creating a full-fledged space under the pitched pitched roof. The visual connection of the interior space with the exterior was ensured by continuous strips of vertical windows around the perimeter of the building, each window measuring 600x600 mm. The space is also illuminated by several skylights at roof level, which, although they ensure sufficient penetration of daylight from above into the interior, at the same time allow for considerably unpleasant overheating. The task was to find a way to optimize the size of transparent surfaces and determine the accumulation of building structures in order to achieve an acceptable cumulative effect of daylight and overheating, i.e., permissible increase in indoor air temperature in summer. It means trying to theoretically design a suitable and comfortable interior space in the attic in an already existing building.
{"title":"Overheating in the Attic Space Classroom in Summer","authors":"D. Katunský, M. Vertaľ, Silvia Zozuláková, E. Dolníková, K. Hutkai","doi":"10.2478/sspjce-2022-0001","DOIUrl":"https://doi.org/10.2478/sspjce-2022-0001","url":null,"abstract":"Abstract The presented study deals with the space located in the attic of an older building after reconstruction. Originally, the attic space was not used, as it did not have sufficient headroom. The reconstruction was designed in such a way that the entire original pitched roof was gradually raised by 1.2 meters in parts, creating a full-fledged space under the pitched pitched roof. The visual connection of the interior space with the exterior was ensured by continuous strips of vertical windows around the perimeter of the building, each window measuring 600x600 mm. The space is also illuminated by several skylights at roof level, which, although they ensure sufficient penetration of daylight from above into the interior, at the same time allow for considerably unpleasant overheating. The task was to find a way to optimize the size of transparent surfaces and determine the accumulation of building structures in order to achieve an acceptable cumulative effect of daylight and overheating, i.e., permissible increase in indoor air temperature in summer. It means trying to theoretically design a suitable and comfortable interior space in the attic in an already existing building.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"61 1","pages":"1 - 9"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90261890","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}
Pub Date : 2022-12-01DOI: 10.2478/sspjce-2022-0008
K. M. Darain, M. A. Hossain, M. Z. Jumaat, M. Arifuzzaman
Abstract This paper aims to present a deflection prediction model of Near Surface Mounted (NSM) Reinforce Concrete (RC) beams using the Fuzzy Logic Expert System (FLES) with different types of membership functions (MF). The absence of a complete theoretical deflection prediction model of NSM-strengthened RC beams persuades this research to develop an Artificial Intelligence (AI) based prediction model using FLES. The proposed model uses triangular and trapezoidal MF to predict the deflection behavior of six NSM-strengthened RC beams. The research variables are strengthening materials and NSM bar length. In this study, two inputs (applied load and variable length) were used to predict two outputs (deflection of two types of strengthened RC beams). The relative error of predicted values was within 5% and the suitability of fit was close to 1.0 which affirms the efficacy of the FLES. Besides, a tiny difference was detected using triangular and trapezoidal MF for the prediction model.
{"title":"Prediction of Deflection Behavior of NSM Strengthened Reinforced Concrete Beam Using Fuzzy Logic","authors":"K. M. Darain, M. A. Hossain, M. Z. Jumaat, M. Arifuzzaman","doi":"10.2478/sspjce-2022-0008","DOIUrl":"https://doi.org/10.2478/sspjce-2022-0008","url":null,"abstract":"Abstract This paper aims to present a deflection prediction model of Near Surface Mounted (NSM) Reinforce Concrete (RC) beams using the Fuzzy Logic Expert System (FLES) with different types of membership functions (MF). The absence of a complete theoretical deflection prediction model of NSM-strengthened RC beams persuades this research to develop an Artificial Intelligence (AI) based prediction model using FLES. The proposed model uses triangular and trapezoidal MF to predict the deflection behavior of six NSM-strengthened RC beams. The research variables are strengthening materials and NSM bar length. In this study, two inputs (applied load and variable length) were used to predict two outputs (deflection of two types of strengthened RC beams). The relative error of predicted values was within 5% and the suitability of fit was close to 1.0 which affirms the efficacy of the FLES. Besides, a tiny difference was detected using triangular and trapezoidal MF for the prediction model.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"22 1 1","pages":"1 - 10"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77373782","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}
Pub Date : 2022-12-01DOI: 10.2478/sspjce-2022-0010
Assia Aidoud, M. Bencheikh, N. Khaldi
Abstract The high temperature in the concrete destroys the hydrates of the cement paste. This destruction means the weakness of the materials caused by the deterioration of their mechanical properties. This work aims to study the behavior of high-performance fiber concrete sets at high temperatures; specifically, we used polypropylene fibers and studied their influence on deterioration behavior. This study includes high performance concrete and three types of fiber concrete, each containing a specific ratio of polypropylene fibers (0.12 %, 0.18 %, and 0.24 %). Consequently, cubic test specimens (15 cm x 15 cm x 15 cm) were subjected to the temperature of 250 °C, with a speed of 2 °C/min followed by a step of one hour at the target temperature then cooling to the ambient temperature. The results showed that fiber-reinforced concrete exhibited a better performance when exposed to the temperature studied. The mechanical properties were improved by up to 56% for compressive strength and 86% for tensile strength.
混凝土中的高温破坏了水泥浆体中的水化物。这种破坏是指由于材料机械性能的恶化而造成的材料的薄弱。本工作旨在研究高性能纤维混凝土在高温下的性能;具体来说，我们使用聚丙烯纤维，研究其对劣化行为的影响。本研究包括高性能混凝土和三种纤维混凝土，每种混凝土含有特定比例的聚丙烯纤维(0.12%，0.18%和0.24%)。因此，立方体试样(15 cm x 15 cm x 15 cm)承受250℃的温度，速度为2°C/min，在目标温度下进行1小时的步骤，然后冷却到环境温度。结果表明，纤维增强混凝土在温度作用下表现出较好的性能。抗压强度提高了56%，抗拉强度提高了86%。
{"title":"Experimental Research on the Thermal Instability of Fiber Polypropylene Concrete at 250 °C","authors":"Assia Aidoud, M. Bencheikh, N. Khaldi","doi":"10.2478/sspjce-2022-0010","DOIUrl":"https://doi.org/10.2478/sspjce-2022-0010","url":null,"abstract":"Abstract The high temperature in the concrete destroys the hydrates of the cement paste. This destruction means the weakness of the materials caused by the deterioration of their mechanical properties. This work aims to study the behavior of high-performance fiber concrete sets at high temperatures; specifically, we used polypropylene fibers and studied their influence on deterioration behavior. This study includes high performance concrete and three types of fiber concrete, each containing a specific ratio of polypropylene fibers (0.12 %, 0.18 %, and 0.24 %). Consequently, cubic test specimens (15 cm x 15 cm x 15 cm) were subjected to the temperature of 250 °C, with a speed of 2 °C/min followed by a step of one hour at the target temperature then cooling to the ambient temperature. The results showed that fiber-reinforced concrete exhibited a better performance when exposed to the temperature studied. The mechanical properties were improved by up to 56% for compressive strength and 86% for tensile strength.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"213 1","pages":"1 - 14"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77879111","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}
Pub Date : 2022-12-01DOI: 10.2478/sspjce-2022-0003
Meriem Dorbani, Rachid Mansouri, F. Balla, M. Kherouf
Abstract Water losses due to leakage are a pernicious problem for water utilities. Understanding and quantifying Non-Revenue Water (NRW) and water loss components is the first step in the management of urban water losses. Hydraulic modeling is a powerful tool to predict the impacts of different management scenarios on the hydraulics of the Water Distribution Network (WDN). The water distribution network (WDN) can be divided into a number of District Meter Areas (DMAs) with suitable sizes in order to apply pressure management. In this study, the Fixed Area Variable Area Discharge (FAVAD) concept and the number of leaks were analyzed for a number of water network pressure management areas in the city of Bendjerrah – the district of Guelma, Algeria. The analysis identified some anomalies concerning the parameters of some networks; especially those related to leakage exponent N1 values greater than 1.5. The approach used in this framework is based on the estimation of the leakage from the Minimum Night Flow (MNF) and the burst frequency of Average Zonal Pressure (AZP). After the use of this approach and the calibration procedure using the Epanet-calibrator on real District Meter Areas, the obtained results are very close to the real state of the network. In addition, this paper studies the possibility of explicitly incorporating the variation of the leakage zone in the hydraulic modeling of the water distribution systems. The results show that the power equation leakage exponent N1 estimates the total system leakage with an error of up to 20%. From the Minimum Night Flow, obtained by using the South African Night Flow (SANFLOW) practical tool, it was found that the actual losses calculated for sectors 1, 2, and 3 are respectively 25%, 45%, and 30%.
{"title":"Assessment of Water Loss in the Water Distribution Network of Bendjerrah Using a Combination Approach of Fixed Area Variable Area Discharge, Minimum Night Flow, and Epanet Calibrator","authors":"Meriem Dorbani, Rachid Mansouri, F. Balla, M. Kherouf","doi":"10.2478/sspjce-2022-0003","DOIUrl":"https://doi.org/10.2478/sspjce-2022-0003","url":null,"abstract":"Abstract Water losses due to leakage are a pernicious problem for water utilities. Understanding and quantifying Non-Revenue Water (NRW) and water loss components is the first step in the management of urban water losses. Hydraulic modeling is a powerful tool to predict the impacts of different management scenarios on the hydraulics of the Water Distribution Network (WDN). The water distribution network (WDN) can be divided into a number of District Meter Areas (DMAs) with suitable sizes in order to apply pressure management. In this study, the Fixed Area Variable Area Discharge (FAVAD) concept and the number of leaks were analyzed for a number of water network pressure management areas in the city of Bendjerrah – the district of Guelma, Algeria. The analysis identified some anomalies concerning the parameters of some networks; especially those related to leakage exponent N1 values greater than 1.5. The approach used in this framework is based on the estimation of the leakage from the Minimum Night Flow (MNF) and the burst frequency of Average Zonal Pressure (AZP). After the use of this approach and the calibration procedure using the Epanet-calibrator on real District Meter Areas, the obtained results are very close to the real state of the network. In addition, this paper studies the possibility of explicitly incorporating the variation of the leakage zone in the hydraulic modeling of the water distribution systems. The results show that the power equation leakage exponent N1 estimates the total system leakage with an error of up to 20%. From the Minimum Night Flow, obtained by using the South African Night Flow (SANFLOW) practical tool, it was found that the actual losses calculated for sectors 1, 2, and 3 are respectively 25%, 45%, and 30%.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"33 1","pages":"1 - 14"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73662446","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}
Pub Date : 2022-12-01DOI: 10.2478/sspjce-2022-0020
Lenka Kabošová, Katarína Čákyová
Abstract The building industry, like many other industries, is driven to take a significant turn due to the pressing issue of global climate change. The potential in digital technologies and digital design approaches is pushed forward and exploited in architecture, structural, civil, and geotechnical engineering. The challenges such as the overheating of buildings and urban spaces, lack of drinking water, expensive and environment-aggressive building materials, and many more are investigated in more depth in Volume 17 of the Selected Scientific Papers - Journal of Civil Engineering.
{"title":"SSP-JCE Volume 17","authors":"Lenka Kabošová, Katarína Čákyová","doi":"10.2478/sspjce-2022-0020","DOIUrl":"https://doi.org/10.2478/sspjce-2022-0020","url":null,"abstract":"Abstract The building industry, like many other industries, is driven to take a significant turn due to the pressing issue of global climate change. The potential in digital technologies and digital design approaches is pushed forward and exploited in architecture, structural, civil, and geotechnical engineering. The challenges such as the overheating of buildings and urban spaces, lack of drinking water, expensive and environment-aggressive building materials, and many more are investigated in more depth in Volume 17 of the Selected Scientific Papers - Journal of Civil Engineering.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"2 1","pages":"1 - 5"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89200619","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}
ABSTRAK: Tanah merupakan dasar dari suatu struktur atau konstruksi, baik itu konstruksi gedung maupun konstruksi jalan, sehingga diharapkan tanah mampu mendukung beban yang ada di atasnya. Salah satu cara untuk mengatasi hal tersebut dilakukan perbaikan tanah dasar yaitu dengan cara stabilisasi dengan menggunakan pasir sungai yang ditujukan untuk memperbaiki gradasi tanah dengan cara mencampur tanah dengan bahan stabilisasi yang memiliki gradasi lebih besar. Pengujian dilakukan dengan cara mencampurkan beberapa variasi persentase pasir sungai terhadap berat tanah, dengan persentase penambahan pasir sungai 10%, 20%, 30%, 40%, 50%. Sampel tanah yang digunakan berasal dari Gunung Selatan Kampung Satu Kota Tarakan. Pengujian yang dilakukan meliputi pengujian sifat fisik dan mekanis tanah. Berdasarkan pemeriksaan sifat fisik tanah asli didapatkan nilai, specific gravity sebesar 2,59, Liquid Limit (LL) 53,2%, Indeks Plastis (IP) 16,50%, analisa ukuran butiran sebesar 57,8%. Pada pengujian sifat mekanis tanah, hasil penelitian menunjukan bahwa penambahan pasir sungai 50% pada pengujian pemadatan berat isi kering mengalami peningkatan dari 1,400 gr/cm³ menjadi 1,557 gr/cm³. Pada pengujian CBR juga mengalami peningkatan, CBR unsoaked dari 6,63% menjadi 13,68% dan CBR soaked dari 3,04 menjadi 8,16% dengan melewati masa perendaman selama 4 hari dan swelling pengalami penurunan dari 19,2% menjadi 12,5%.Kata kunci: tanah lempung, stabilisasi pasir sungai, sifat fisik dan mekanis tanah
抽象地说:土壤是结构或建筑的基础，无论是建筑还是道路建设，因此期望土壤能够支撑其上的负担。解决这个问题的一个方法是通过使用河上的沙子来稳定土壤的变化，通过将土壤与更大层次的稳定材料混合来修复土壤的变化。测试包括将某些种类的河沙与土壤的重量混合，再加上10% 20% 30% 40% 50%。使用的土壤样本来自萨塔拉郡的南山。测试包括测试土壤的物理和机械性质。根据对原始土壤的物理性质的评估，其价值为2.59、53.2%的液态量、16.50%的Plastis索引，分数为57.8%。研究土壤机械品质测试,结果显示,增加50%的沙子河出现在干燥的气态重测试内容增长1400的gr / cm³成为1,557 gr / cm³。在CBR的测试中，CBR从6.63%提升到13.68%，CBR从3.04提升到8.16%，通过浸泡时间4天，突出了19.2%降至12.5%。关键词:粘土土壤、河沙稳定、土壤的物理和机械性质
{"title":"KOMBINASI TANAH LEMPUNG DAN PASIR SUNGAI SEBAGAI BAHAN UNTUK SUBGRADE","authors":"W. Lestari, Hasrullah Hasrullah","doi":"10.35334/cesj.v1i2.3363","DOIUrl":"https://doi.org/10.35334/cesj.v1i2.3363","url":null,"abstract":"ABSTRAK: Tanah merupakan dasar dari suatu struktur atau konstruksi, baik itu konstruksi gedung maupun konstruksi jalan, sehingga diharapkan tanah mampu mendukung beban yang ada di atasnya. Salah satu cara untuk mengatasi hal tersebut dilakukan perbaikan tanah dasar yaitu dengan cara stabilisasi dengan menggunakan pasir sungai yang ditujukan untuk memperbaiki gradasi tanah dengan cara mencampur tanah dengan bahan stabilisasi yang memiliki gradasi lebih besar. Pengujian dilakukan dengan cara mencampurkan beberapa variasi persentase pasir sungai terhadap berat tanah, dengan persentase penambahan pasir sungai 10%, 20%, 30%, 40%, 50%. Sampel tanah yang digunakan berasal dari Gunung Selatan Kampung Satu Kota Tarakan. Pengujian yang dilakukan meliputi pengujian sifat fisik dan mekanis tanah. Berdasarkan pemeriksaan sifat fisik tanah asli didapatkan nilai, specific gravity sebesar 2,59, Liquid Limit (LL) 53,2%, Indeks Plastis (IP) 16,50%, analisa ukuran butiran sebesar 57,8%. Pada pengujian sifat mekanis tanah, hasil penelitian menunjukan bahwa penambahan pasir sungai 50% pada pengujian pemadatan berat isi kering mengalami peningkatan dari 1,400 gr/cm³ menjadi 1,557 gr/cm³. Pada pengujian CBR juga mengalami peningkatan, CBR unsoaked dari 6,63% menjadi 13,68% dan CBR soaked dari 3,04 menjadi 8,16% dengan melewati masa perendaman selama 4 hari dan swelling pengalami penurunan dari 19,2% menjadi 12,5%.Kata kunci: tanah lempung, stabilisasi pasir sungai, sifat fisik dan mekanis tanah","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81848630","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}
ABSTRAK: Salah satu Hanggar Pesawat yang ada di Kota Tarakan adalah milik Yayasan MAF, yang dibangun sejak tahun 1980. Hanggar ini terletak di Jalan Mulawarman, Bandar Udara Juwata, Kota Tarakan. Infrastruktur hanggar digunakan sebagai tempat perawatan, tempat perbaikan, dan perlindungan pesawat dari cuaca luar. Konstruksi hanggar ini menggunakan struktur rangka atap dengan menerapkan material pipa baja galvanis. Saat ini telah diwajibkan perhitungan struktur menggunakan faktor gempa sesuai dengan SNI 1726 2019. Sehingga perlu untuk dilakukan identifikasi dari kekuatan struktur Hanggar Pesawat milik Yayasan MAF, dengan tujuan menilai kekuatan atau kestabilan struktur Hanggar Pesawat tersebut. Penelitian dilakukan dengan menggunakan model 2-Dimensi dan 3-Dimensi sesuai dengan kondisi eksisting Hanggar Pesawat tersebut. Berdasarkan analisis yang telah dilakukan baik pada pemodelan 2-Dimensi dan 3-Dimensi menunjukkan konstruksi Hanggar Pesawat mengalami ketidakstabilan struktur. Hal ini disebabkan oleh salah satu batang yaitu batang B130 tidak memenuhi syarat kelangsingan sebagai batang tekan atau batang tarik. Telah dilakukan analisis lebih jauh batang B130 tersebut ternyata tidak memberikan pengaruh signifikan terhadap Hanggar Pesawat, sehingga dapat dihilangkan sebagai salah satu elemen penyusun konstruksi Hanggar Pesawat tersebut. Kata Kunci: Hanggar Pesawat, Struktur Rangka Atap, Pipa Baja Galvanis, Batang Tarik, Batang Tekan
{"title":"Studi Analisis Struktur Rangka Hanggar Pesawat Maf Kota Tarakan Berdasarkan Peraturan Terbaru (Sni 1727 2020 Dan Sni 1726 2019)","authors":"Anna Celia Apriliana, Edy Utomo","doi":"10.35334/cesj.v1i1.2889","DOIUrl":"https://doi.org/10.35334/cesj.v1i1.2889","url":null,"abstract":"ABSTRAK: Salah satu Hanggar Pesawat yang ada di Kota Tarakan adalah milik Yayasan MAF, yang dibangun sejak tahun 1980. Hanggar ini terletak di Jalan Mulawarman, Bandar Udara Juwata, Kota Tarakan. Infrastruktur hanggar digunakan sebagai tempat perawatan, tempat perbaikan, dan perlindungan pesawat dari cuaca luar. Konstruksi hanggar ini menggunakan struktur rangka atap dengan menerapkan material pipa baja galvanis. Saat ini telah diwajibkan perhitungan struktur menggunakan faktor gempa sesuai dengan SNI 1726 2019. Sehingga perlu untuk dilakukan identifikasi dari kekuatan struktur Hanggar Pesawat milik Yayasan MAF, dengan tujuan menilai kekuatan atau kestabilan struktur Hanggar Pesawat tersebut. Penelitian dilakukan dengan menggunakan model 2-Dimensi dan 3-Dimensi sesuai dengan kondisi eksisting Hanggar Pesawat tersebut. Berdasarkan analisis yang telah dilakukan baik pada pemodelan 2-Dimensi dan 3-Dimensi menunjukkan konstruksi Hanggar Pesawat mengalami ketidakstabilan struktur. Hal ini disebabkan oleh salah satu batang yaitu batang B130 tidak memenuhi syarat kelangsingan sebagai batang tekan atau batang tarik. Telah dilakukan analisis lebih jauh batang B130 tersebut ternyata tidak memberikan pengaruh signifikan terhadap Hanggar Pesawat, sehingga dapat dihilangkan sebagai salah satu elemen penyusun konstruksi Hanggar Pesawat tersebut. Kata Kunci: Hanggar Pesawat, Struktur Rangka Atap, Pipa Baja Galvanis, Batang Tarik, Batang Tekan","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84430322","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}
ABSTRAK: Proyek konstruksi adalah pekerjaan mendirikan suatu bangunan dalam waktu yang telah ditentukan dan selesai tepat waktu atau bahkan lebih lepat dari waktu yang diperkirakan. Proyek kontruksi tentunya mempertimbangkan jenis tanah sebelum melakukan pembangunan pada lokasi tersebut dimana tanah memiliki peranan yang penting. Tujuan dari penelitian di Proyek Pembangunan Gedung Sekolah SMPN 11 Tarakan ini, untuk mengetahui jenis tanah dengan data sondir dan untuk mengetahui kapasitas daya dukung tiang pancang dengan menggunakan metode statis dan metode dinamis. Hasil perhitungan daya dukung tiang pancang kelompok dengan menggunakan metode statis pada titik sondir S-2 yang beban terbesarnya terdapat pada metode Mayerhoff sebesar 411,774 ton dan yang terkecil pada metode Shamertmann sebesar 111,330 ton. Daya dukung tiang pancang kelompok dengan menggunakan metode dinamis yang terbesarnya yaitu pada titik G-8-F metode AASHTO sebesar 1879,223 ton sedangkan yang terkecil pada titik G-8-C metode Janbu sebesar 409,014 ton. Angka keamanan (SF) pada metode statis pada titik sondir menghasilkan nilai SF terbesar pada titik sondir S-1 metode Mayerhoff sebesar 6,49 dan terkecil pada titik sondir S-5 metode Shamertmann sebesar 0,10. Pada metode dinamis menghasilkan nilai SF terbesar pada titik G-8-F metode AASHTO sebesar 6,63 dan yang terkecil pada titik G-8-C metode Janbu sebesar 1,44. Kata Kunci: Angka keamanan, klasifikasi tanah metode statis dan dinamis, penurunan tiang, pondasi tiang.
{"title":"Analisis Daya Dukung Tiang Pancang Pada Gedung Smpn 11 Tarakan Dengan Menggunakan Data Cpt Dan Kalendering","authors":"M. Mustakim, Hasrullah Hasrullah","doi":"10.35334/cesj.v1i1.2888","DOIUrl":"https://doi.org/10.35334/cesj.v1i1.2888","url":null,"abstract":"ABSTRAK: Proyek konstruksi adalah pekerjaan mendirikan suatu bangunan dalam waktu yang telah ditentukan dan selesai tepat waktu atau bahkan lebih lepat dari waktu yang diperkirakan. Proyek kontruksi tentunya mempertimbangkan jenis tanah sebelum melakukan pembangunan pada lokasi tersebut dimana tanah memiliki peranan yang penting. Tujuan dari penelitian di Proyek Pembangunan Gedung Sekolah SMPN 11 Tarakan ini, untuk mengetahui jenis tanah dengan data sondir dan untuk mengetahui kapasitas daya dukung tiang pancang dengan menggunakan metode statis dan metode dinamis. Hasil perhitungan daya dukung tiang pancang kelompok dengan menggunakan metode statis pada titik sondir S-2 yang beban terbesarnya terdapat pada metode Mayerhoff sebesar 411,774 ton dan yang terkecil pada metode Shamertmann sebesar 111,330 ton. Daya dukung tiang pancang kelompok dengan menggunakan metode dinamis yang terbesarnya yaitu pada titik G-8-F metode AASHTO sebesar 1879,223 ton sedangkan yang terkecil pada titik G-8-C metode Janbu sebesar 409,014 ton. Angka keamanan (SF) pada metode statis pada titik sondir menghasilkan nilai SF terbesar pada titik sondir S-1 metode Mayerhoff sebesar 6,49 dan terkecil pada titik sondir S-5 metode Shamertmann sebesar 0,10. Pada metode dinamis menghasilkan nilai SF terbesar pada titik G-8-F metode AASHTO sebesar 6,63 dan yang terkecil pada titik G-8-C metode Janbu sebesar 1,44. Kata Kunci: Angka keamanan, klasifikasi tanah metode statis dan dinamis, penurunan tiang, pondasi tiang.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"125 2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80496468","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}
ABSTRAK: Penelitian ini bertujuan untuk mengetahui pengaruh manajemen rantai pasok dan pandemi covid-19 terhadap kinerja proyek pembangunan gedung Laboratorium Sentral Ilmu Hayati (LSIH) Universitas Borneo Tarakan. Responden dalam penelitian ini diambil menggunakan metode purposive sampling pada semua pihak yang terlibat dalam proyek ini. Pengujian instrument menggunakan uji validitas dan uji reabilitas menggunakan spss versi 25. Metode analisis data menggunakan regresi linier berganda. Hasil dari penelitian ini menunjukkan bahwa manajemen rantai pasok memberikan pengaruh positif terhadap kinerja proyek sedangkan pandemic covid-19 memberikan pengaruh negative terhadap kinerja proyek serta diperoleh persamaan regresi Y = 12,335 + 0,141X1 – 0,264X2Kata Kunci : Manajemen Rantai Pasok, Pandemi Covid-19, Kinerja Proyek.
{"title":"Identifikasi Pengaruh Manajemen Rantai Pasok Dan Pandemi Covid-19 Terhadap Kinerja Proyek Pembangunan Gedung Lsih UBT","authors":"Tri Andika, B. Setiawan","doi":"10.35334/cesj.v1i1.2895","DOIUrl":"https://doi.org/10.35334/cesj.v1i1.2895","url":null,"abstract":"ABSTRAK: Penelitian ini bertujuan untuk mengetahui pengaruh manajemen rantai pasok dan pandemi covid-19 terhadap kinerja proyek pembangunan gedung Laboratorium Sentral Ilmu Hayati (LSIH) Universitas Borneo Tarakan. Responden dalam penelitian ini diambil menggunakan metode purposive sampling pada semua pihak yang terlibat dalam proyek ini. Pengujian instrument menggunakan uji validitas dan uji reabilitas menggunakan spss versi 25. Metode analisis data menggunakan regresi linier berganda. Hasil dari penelitian ini menunjukkan bahwa manajemen rantai pasok memberikan pengaruh positif terhadap kinerja proyek sedangkan pandemic covid-19 memberikan pengaruh negative terhadap kinerja proyek serta diperoleh persamaan regresi Y = 12,335 + 0,141X1 – 0,264X2Kata Kunci : Manajemen Rantai Pasok, Pandemi Covid-19, Kinerja Proyek.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82256550","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}
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