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Jurnal Teknik Sipil dan Perencanaan
Published by Universitas Negeri Semarang
ISSN : -     EISSN : 25031899     DOI : https://doi.org/10.15294/jtsp
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
Jurnal Teknik Sipil dan Perencanaan (JTSP) is a scientific journal which biannualy published in April and October. We firstly published in 1999 as national journal of Department of Civil Engineering, Faculty of Engineering, Universitas Negeri Semarang. In 2016, JTSP was indexed in DOAJ with Green Tick critera. And in 2018, JTSP expands its range of article quality and publication through publishing English-language articles.
Arjuna Subject : -
Articles 774 Documents
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ANALISIS KUAT LENTUR BALOK BETON BERTULANG DENGAN CARBON FIBER WRAP Pangestuti, Endah Kanti; Prihanantio, Januar
Jurnal Teknik Sipil dan Perencanaan Vol 10, No 1 (2008): Jurnal Teknik Sipil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v10i1.6941

Abstract

The increase of capacity of reinforced concrete structure flexibility can be conducted by strengthening that structure. This day, new type of materials have been introduced, that is carbon fiber wrap (CFW). This material usually used as shift strength on beam either column. However in this research, CFW is tested as flexibility strength on beam. This research using 4 test objects, one of test object as control beam ( BK ) and the other three objects with different installation variation pattern of CFW, that is the test object is given by a strength as wide as 1/2b along the beam reach ( BCFW- 1/2b ), and than as wide as b ( BCFW – b ) and “U” model ( BCFW – U ). The test result shows that on BCFW –1/2b, the moment capacity ancrease at 72.22%, ductility increase at 119.3% to the control beam. While to the BCFW – b the momen capacity is 91.67%, ductility increase at 233.33%. While on BCFW – U the moment capacity increase only 8.33% and the ductility increase at 7.72%. From this test result, shows that strengthening using CFW that most effective is on the BCFW – 1/2b. Because with the installation of CFW as wide as 1/2b able to increase the moment capacity significantly than the other test object. For BCFW – U, this strength pattern is not suggested because the moment capacity increase insignificantly.Peningkatan kapasitas lentur struktur beton bertulang dapat dilakukan dengan melakukan perkuatan terhadap struktur. Saat ini material jenis baru telah diperkenalkan yaitu carbon fiber wrap (CFW). Material ini biasanya digunakan sebagai perkuatan geser baik pada balok maupun kolom. Namun dalam penelitian ini CFW diujicobakan sebagai perkuatan lentur pada balok. Penelitian ini menggunakan empat buah benda uji, satu benda uji sebagai balok kontrol (BK) dan tiga lainnya sebagai benda uji dengan pola variasi pemasangan CFW yang berbeda, yaitu benda uji diberi perkuatan selebar ½ b sepanjang bentang balok (BCFW-1/2b),kemudian selebar b (BCFW-b) dan model U (BCFW-U). Hasil pengujian menunjukkan bahwa pada BCFW–½ b kapasitas momen naik sebesar 72,22%, daktilitas naik 119,3% terhadap balok kontrol. Sedangkan pada BCFW – b kapasitas momen 91,71%, daktilitas naik 233,33%. Sementara untuk BCFW–U kapasitas  momen  hanya mengalami kenaikan sebesar 8,33% dan daktilitasnya naik 7,72%. Dari hasil pengujian ini ternyata perkuatan dengan CFW yang paling efektif adalah pada BCFW – 1/2b. Karena dengan pemasangan CFW selebar 1/2b mampu meningkatkan kapasitas momen yang cukup signifikan dibandingkan benda uji lainnya. Untuk BCFW–U, pola perkuatan ini tidak disarankan karena peningkatan kapasitas momennya relatif kecil.
GERUSAN LOKAL DI KAKI STRUKTUR IMPERMEABLE BERDINDING MIRING -, Dalrino; Utomo, Karuniadi Satrijo
Jurnal Teknik Sipil dan Perencanaan Vol 13, No 2 (2011): Jurnal Teknik Sipil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v13i2.7062

Abstract

Toe scour was one of phenomenon that frequently experienced by coastal structures and realized as the causative factor to structure failure. When a coastal structure was placed at coastal environment, existence of that structure would rapidly affect to the flow pattern around its area, one of them was breaking wave position. When breaking wave happened, energy dissipation caused by breaking process would be compensated in the form of vortex and improvement of flow intensity that have ability to move bed material from its original rest position around the toe.This research was focused on the breaking wave condition that produce local scouring at toe of impermeable sloping wall structure. Testing variable consists of wave height (H ), wave period (T) , water depth at toe (ds), beach slope (tan b), and angle of structure (a). Physical Modeling was conducted at wave flume with 40 m length, 0.6 m width and 1.1 m height in Balai Hidraulika and Geoteknik Keairan (BHGK) PUSAIR, Bandung. Riset result shows that improvement of toe scour was affected by breaking wave characteristics and their interaction with the structure. Improvement of depth of scour was in relation with water depth at toe, height of wave breaking, surf similarity parameter, bed agitation caused by breaking process, and downrush flow velocity.Gerusan kaki merupakan fenomena yang sering dialami oleh struktur-struktur bangunan pantai dan disadari sebagai faktor penyebab kegagalan struktur. Saat struktur ditempatkan di lingkungan pantai, keberadaan struktur tersebut akan segera mempengaruhi pola aliran disekitarnya, salah satunya adalah posisi gelombang pecah. Saat terjadi gelombang pecah, disipasi energi akibat proses pecahnya gelombang akan terkompensasi dalam bentuk vortex dan peningkatan intensitas aliran yang memiliki kemampuan untuk memindahkan material dasar dari posisi awalnya di kaki struktur. Penelitian ini difokuskan pada kondisi gelombang pecah yang menghasilkan gerusan local di kaki pada struktur impermeable berdinding miring. Variabel pengujian terdiri atas tinggi gelombang (H), periode gelombang (T), kedalaman air di kaki struktur (ds), kemiringan pantai (tan b), dan sudut kemiringan struktur (a). Pemodelan fisik dilakukan pada saluran gelombang dengan panjang 40 m, lebar 0,6 m dan tinggi 1,1 m di Balai Hidraulika dan Geoteknik Keairan (BHGK) PUSAIR, Bandung. Hasil penelitian memperlihatkan terjadinya peningkatan gerusan kaki sebagai akibat dari karakter gelombang pecah dan interaksinya terhadap struktur. Peningkatan kedalaman gerusan sebagai hubungan dari kedalaman air di kaki struktur, tinggi gelombang pecah, parameter surf similarity, gangguan terhadap dasar di kaki struktur akibat proses pecah gelombang, dan kecepatan aliran downrush.
MEKANISME LONGSORAN LERENG PADA RUAS JALAN RAYA SEKARAN GUNUNGPATI SEMARANG Nugroho, Untoro; Andiyarto, Hanggoro Tri Cahyo; Purnomo, Mego
Jurnal Teknik Sipil dan Perencanaan Vol 14, No 1 (2012): Jurnal Teknik Sipil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v14i1.14452

Abstract

Abstrak: Penanggulangan longsoran lereng di ruas jalan Sekaran Gunungpati Semarang sebenarnya secara parsial sudah dilakukan dari setiap tahunnya, namun di setiap musim penghujan indikasi yang sama yakni rekahan pada permukaan jalan aspal yang menunjukkan arah gerakan massa tanah selalu saja muncul. Hal ini menunjukkan bahwa sistem perkuatan lereng yang ada ikut bergerak bersama material longsoran karena bidang longsor berada di bawah perkuatan lerengnya. Untuk itu, guna menunjang efektivitas pemilihan desain perkuatan lereng, diperlukan pemahaman tentang mekanisme longsoran pada lokasi studi melalui serangkaian pengujian tanah dan analisis stabilitas lereng dengan metode elemen hingga (SSR-FEM). Berdasarkan hasil pengujian tanah di lapangan dengan uji sondir pada 2 (dua) lokasi studi Trangkil dan Deliksari Gunungpati, kedalaman tanah keras mencapai 12,00 – 26,00 meter. Bidang longsor berbentuk kurva planar dan gerakan massa tanah berupa translasi pada kedalaman 10,00-13,00 meter. Pada lokasi studi Trangkil Gunungpati, analisis stabilitas lereng menunjukkan pada saat kekuatan geser tanah di zona bidang longsor direduksi sebesar 20% dari kondisi semula, lereng mulai bergerak dengan nilai faktor aman (SF) stabilitas lereng 1,06. Kondisi awal sebelum kekuatan geser tanah direduksi, lereng masih dalam kondisi aman SF 1,20 (= 1,23). Hal ini menunjukkan bahwa pada lokasi studi yang lahannya masih berupa tegalan ini rentan terjadi gerakan massa tanah pada saat nilai kekuatan geser tanah pada zona bidang longsor terus tereduksi selama musim penghujan.
MODEL KUAT TEKAN, POROSITAS DAN KETAHANAN AUS PROPORSI LIMBAH PELEBURAN BESI DAN SEMEN UNTUK BAHAN DASAR PAVING BLOCK Dermawan, Moch. Husni
Jurnal Teknik Sipil dan Perencanaan Vol 13, No 1 (2011): Jurnal Teknik Sipil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v13i1.1325

Abstract

Abstract: Utilization of iron smelting waste has not been fully utilized for building materials, especially as an ingredient in the manufacture of paving block stacking. The purpose of this study was to characterize the slag and to determine compressive strength, porosity, wear resistance of paving blocks by using slag as a sand substitute. The method used by experimental methods. Preparation of specimens made 2 types of test object without slag and specimens with slag content. The specimens made 4 treatment research slag content of 20%, 40%, 60%, and 80%. Each group was made of samples, 5 for compressive strength, 5 porosity and 5 wear resistance. Testing is done at BPIK Semarang. Test results from block paving with slag content of 0% shows the compressive strength of 204.24 kg / cm ², 4.95% porosity, resilience auas 0.145 mm / min. Slag content of 20%, compressive strength of 192.13 kg / cm ², 6.150% porosity, wear resistance 0.186 mm / min. Slag content of 40%, compressive strength of 179.33 kg / cm ², 7.657% porosity, wear resistance 0.259 rnm / min. Slag content of 60%, compressive strength of 164.94 kg / cm ², 8.509% porosity, wear resistance 0.3482. 80% slag content of compressive strength of 149.06 kg / cm ², 9.911% porosity, wear resistance 0.448 mm / min. Compressive strength of paving blocks with slag content of 20% and 40% belong to the quality of III, the porosity of the paving block 20% slag content is categorized in the quality of III, and wear resistance of paving blocks slag content of 20%belong to the quality of III.Keywords: compressive strength, wear resistance, porosity, paving block Abstrak: Pemanfaatan limbah peleburan besi belum dimanfaatkan secara maksimal untuk bahan bangunan, khususnya sebagai bahan susun dalam pembuatan paving block. Tujuan dalam penelitian ini adalah untuk mengetahui karakteristik terak dan untuk mengetahui kuat tekan, porositas, ketahanan aus paving block dengan menggunakan terak sebagai bahan substitusi pasir. Metode yang digunakan dengan metode eksperimen. Pembuatan benda uji dibuat 2 jenis yaitu benda uji tanpa terak dan benda uji dengan kandungan terak. Benda uji penelitian dibuat 4 perlakuan kandungan terak yaitu 20%, 40%, 60%, dan  80%. Tiap kelompok dibuat benda uji, 5 untuk kuat tekan, 5 porositas dan 5 ketahanan aus. Pengujian dilakukan di BPIK Semarang. Hasil pengujian dari paving block dengan kandungan terak 0% menunjukkan kuat tekan 204,24 kg/cm², porositas 4,95%, ketahanan auas 0,145 mm/menit. Kandungan terak 20%, kuat tekan 192,13 kg/cm², porositas 6,150%, ketahanan aus 0,186 mm/menit. Kandungan terak 40%, kuat tekan 179,33 kg/cm², porositas 7,657%, ketahana aus 0,259 rnm/menit. Kandungan terak 60%, kuat tekan 164,94 kg/cm², porositas 8,509%, ketahanan aus 0,3482. Kandungan 80% terak kuat tekan 149,06 kg/cm², porositas 9,911%, ketahanan aus 0,448 mm/menit. Kuat tekan paving block dengan kandungan terak 20% dan 40% tergolong dalam mutu III, porositas paving block kandungan terak 20% tergolong dalam mutu III, dan ketahanan aus paving block kandungan terak 20% tergolong dalam mutu III.Kata Kunci: kuat tekan, keausan, porositas, paving block
KAJIAN MANAJEMEN OPTIMALISASI PENERANGAN JALAN UMUM KOTA SEMARANG Widodo, Aris
Jurnal Teknik Sipil dan Perencanaan Vol 18, No 2 (2016)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v18i2.7476

Abstract

This research mainly aims to give input to Semarang Local Government in the efficiency of electricity utilization to the street illumination and the management of income tax from the societies, so they can be utilized optimally, directly, and in integrated way in order to the management of city infrastructures service. This research using the influence of traffic passenger car unit (pcu) for optimizing in a low density of traffic condition. The data of the Average Daily Traffic (ADT) volume on Pahlawan street was gathered from 6.00 p.m-6.00 a.m in every 15 minutes. The data was analyzed using quartile technique with K1 (25%) and K2 (50 %), then the researcher designed a line chart table of a link between the ADT and the time of the electricity switching on. In working days, the results are (1) the efficient time of street illumination in K1 (25%) was between 10.30 p.m-3.45 a.m, (2) in K2 (50%) was between 9.45 p.m-4.30 a.m. Due to the security and the beauty of the town and also considering the density of the traffic, the optimization and the dimming of the electricity are not needed in holidays. The optimization using ballast dimming (40%) from 250 watt to 150 watt for all lamps, obtained a significant account 32,4 Lx for average illumination. It is still fulfill the minimal requirement of 7 Lx for the average illumination on the collector street type. The optimization with dimming system obtained an efficiency in K1 (25%) was 23.16% and in K2 (50%) was 25,05%.  Kajian ini bertujuan untuk memberi masukan kepada Pemerintah Kota Semarang dalam rangka efisiensi penggunaan daya listrik untuk penerangan jalan umum dan pengelolaan  pendapatan pajak dari masyarakat. Kajian ini menggunakan pengaruh dari kepadatan lalu lintas jalan dalam satuan mobil penumpang (smp), guna optimalisasi penerangan jalan umum dalam kondisi kepadatan lalu lintas jalan yang rendah. Data Volume Lalu lintas Harian Rata-rata (LHR) Jalan pahlawan dilakukan dari jam 18.00 sore hari, hingga 06.00 WIB pagi  dengan pencatatan per 15 menit, kemudian dibuat tabel grafik garis hubungan antara LHR dengan waktu penyalaan lampu penerangan jalan umum Kota Semarang, pada hari kerja diperoleh : (1) waktu efisiensi penyalaan lampu pada K1 (25%) antara jam 22.30 sampai dengan 03.45 Wib, (2) waktu efisiensi penyalaan lampu pada K2 (50%) antara jam 21.45 sampai dengan 04.30 Wib. Sedangkan pada hari libur berdasarkan keamanan dan keindahan kota serta volume lalulintas kendaraan yang cukup padat maka tidak ada perlakuan optimalisasi peredupan. Optimalisasi dengan sistem peredupan ballast (40%) dari daya 250 watt menjadi 150 watt pada seluruh titik lampu penerangan, didapat perhitungan kuat penerangan rata-rata sebesar 32,4 Lx,  dan masih memenuhi syarat minimal kuat penerangan rata-rata untuk jenis jalan kolektor sebesar 7 Lx. Sistem optimalisasi dengan peredupan  diperoleh efisiensi pada K1 (25%) sebesar 23,16 % dan  K2 (50%) sebesar 25,05%..  
Failure Analysis of Glulam Lumber Beam Made from Meranti Lumber Pieces (Shorea SP) Murtopo, Ali; Jannah, Ria Miftakhul; Sabilla, Sabilla; Tsaniyah, Labibah
Jurnal Teknik Sipil dan Perencanaan Vol 22, No 2 (2020)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v22i2.26231

Abstract

The development of glue-laminated (glulam) lumber beam gives many good results. Meranti (Shorea SP) is one of the construction lumber that can be used as glulam to optimize its use. The limitation of the glulam lumber beam is the limited length of the lumber, so it must be joined to get a certain length. The lumber available in the market on average has a limited size and cross-sectional length. The larger the cross-sectional size and length of the lumber make the higher the price. Used lumber and residual lumber also have many weaknesses, such as the length of suitable lumber is too short, lumber defects, and lumber damages. Further research needs to be done to optimize the use of new, used, and residual meranti lumber through the use of lumber pieces as a glulam lumber beam maker. Standard specimen and test based on ASTM D-198. Glulam lumber beam is made from pieces of meranti lumber planks of certain length which are arranged into lamina beam with the size of 5.5x9.5x150 cm3. Variations in the length of the pieces of meranti lumber planks for making glulam lumber beam, among others, 40 cm, 50 cm, 60 cm, 50 cm with full length lowest layer and 150 cm (full length). The adhesive used is polyurethane glue. The span between supports is 130 cm. The beam is tested for center point loading. The analysis results show that the joints on the outermost layer that receive tensile stress of the glulam lumber beam can cause weakening in the beam because the tensile strength of the adhesive is weaker than the tensile strength of lumber. Failure at the tensile joint of the outer layer of the beam can trigger a shear failure mode. Design of joints should not be placed on layers that are subject to tensile stresses so as not to trigger shear failure modes so that the strength of the glulam lumber beam can be optimal.
MEKANISME PERILAKU GERUSAN LOKAL PADA PILAR TUNGGAL DENGAN VARIASI DIAMETER Qudus, Nur; Agustina, Asih Suprapti
Jurnal Teknik Sipil dan Perencanaan Vol 9, No 2 (2007): Jurnal Teknik Sipil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v9i2.6927

Abstract

River has a dynamical characteristic which can change in time and place dimension. In balance condition, the bridge pillar would disturb the flow, and the flow reaches a balance condition again after bed scouring. The scouring around bridge pillar is caused by vortex system. These research would study the depth of scouring around the bridge single pilar. The depth of scouring around the bridge pillar has been observed for 3.5 hours by using a set of recirculating sediment flum with 6 m long; 0.21 m width and 0.30 m height in quasi-steady uniform low. The model of pillar used was circular type having dimention diameter 21.95 mm; 26.25 mm; 32.95 mm; 4175 mm and 47.50 mm. The depth of scouring was measured for every running, consist of diameter variation. Flow velocity around pillar was measured for every variation that caused a minimum scour. The pillar diameter that caused the minimum scouring was at the ground, with the diameter 21.95 mm, and the pillar diameter that caused the maximum scouring at diameter 47.50 mm.Sungai mempunyai sifat yang dinamis yang dapat berubah dalam dimensi ruang dan waktu. Pada saat kondisi seimbang, aliran akan terganggu dengan adanya pilar jembatan dan akan membentuk kondisi seimbang lagi yang menyebabkan gerusan dasar. Gerusan di sekitar pilar jembatan yang disebabkan oleh adanya sistem vortex. Penelitian ini akan mempelajari kedalaman gerusan lokal pada pilar tunggal jembatan. Kedalaman gerusan di sekitar pilar jembatan diamati selama 3,5 jam dilakukan pada satu set recirculating sediment flume dengan panjang 6 meter, lebar 0,21 meter dan tinggi 0,30 meter dengan kondisi aliran permanen seragam. Model pilar yang digunakan adalah tipe circular dengan dimensi diameter 21,95 mm; 26,25 mm; 32,95 mm;  41,75 mm dan 47,50 mm. Kedalaman gerusan diukur setiap running yang terdiri dari variasi diameter. Kecepatan aliran disekitar pilar diukur pada setiap variasi yang menyebabkan gerusan minimal terjadi. Diameter pilar yang menyebabkan gerusan minimal adalah pada dasar saluran dengan diameter 21,95 mm, dan diameter pilar yang menyebabkan gerusan maksimum pada diameter 47,50 mm.
KAPASITAS LENTUR BALOK BETON BERTULANG DENGAN SERAT SABUT KELAPA Apriyatno, Henry
Jurnal Teknik Sipil dan Perencanaan Vol 15, No 1 (2013): Jurnal Teknik Sipil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v15i1.7113

Abstract

Concrete has a weakness in its tensile strength and easily broken so that the concrete cross-sectional area of capacity planning appeal is not taken into account. The weakness of concrete can be improved by increasing the fiber that has a purpose as concrete reinforcement fibers uniformly. The fiber used is coco fiber length of 8 cm in the composition of 0%, 1%, 1:33%, 2% and 4% of the volume of concrete. Mechanical changes of concrete obtained from concrete test cylinders and pure bending concrete beams measuring 15 cm x 20 cm x 110 cm at the optimum composition of the fiber to the concrete. The results showed the addition of fiber causes the concrete cylinder press capacity was significantly increased by 5.583% as well as the tensile strength of concrete rose by an average of 5.225%. Ductility properties of concrete increased significantly while the modulus of elasticity of concrete is significantly decreased, the bending capacity of the beam used pure bending optimum composition of 1% of the volume of concrete with fiber deployment 12:25 h and 0.5 h obtained the best results with an average increase of 6.65%.Beton memiliki kelemahan pada kuat tarik dan sifat getasnya rendah (mudah putus) sehingga dalam perencanaan kapasitas tampang beton daerah tarik tidak diperhitungkan. Kelemahan beton dapat diperbaiki dengan menambah serat yang memiliki tujuan menulangi beton dengan serat secara uniform. Serat yang dipakai adalah serat sabut kelapa panjang 8 cm pada komposisi 0%,1%,1.33%,2% dan 4%  dari volume beton. Perubahan mekanis beton diperoleh dari uji silinder beton dan balok beton lentur murni berukuran 15 cm x 20 cm x 110 cm pada komposisi optimum serat terhadap beton. Hasil penelitian menunjukkan dengan penambahan serat menyebabkan kapasitas tekan silinder beton secara signifikan naik sebesar 5,583%  demikian juga kuat tarik beton naik rata-rata sebesar 5,225%. Sifat daktailitas beton meningkat secara signifikan sedangkan modulus elastisitas beton secara signifikan menurun, kapasitas lentur balok  lentur murni dipakai komposisi optimum 1% serat terhadap volume beton dengan penyebaran 0.25 h dan 0.5 h diperoleh hasil yang paling baik dengan peningkatan rata-rata sebesar 6,65%.. 
Maximum Control Water Level (CWL) Jatibarang Dam to Avoid The Possibility of Overtopping Due to Flood 100 Years Sutopo, Yeri; Utomo, Karuniadi Satrijo
Jurnal Teknik Sipil dan Perencanaan Vol 21, No 2 (2019)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v21i2.20507

Abstract

The study of the maximum water level control of the Jatibarang reservoir is to avoid the possibility of overtopping due to flooding after 100 years return period, therefore it is necessary to take into account the changes in land use, which were once shrubs turned into settlements. Changes in land use result in an increase in the drainage coefficient which results in an increase in surface runoff so that the flood discharge in the river becomes even greater. Jatibarang Dam in Semarang at the time of planning was still designed to use flood discharge return period of Q 50 years; whereas the water structure has included a hazard level classification, so flood safety standards should have been used return period of the Q 100 years. The aims of this study are (1) to analyze the maximum CWL value in the main spillway of the Jatibarang dam based on the analysis of flooding due to Q 100 years; and (2) comparing the maximum CWL value of the main overflow dam Jatibarang results of planning using Q 50 years with the maximum CWL value of the main overflow dam due to flood discharge Q 100 years.This type of research was a survey. Data collection methods used were observation and documentation. The observation method was used to determine the coordinates of the dam spillway, which was then used to make a Jatibarang dam spillway watershed map and directly observe the Jatibarang dam spillway construction. The documentation method was used to collect rainfall data.The inflow flood hydrograph for a 100 year return period is 1838.84 m3/s, while the outflow is 227.57 m3/s, thus the Jatibarang reservoir can accommodate or store flood discharge of 1611.27 m3/s. The maximum elevation of the Jatibarang dam spillway is +155.3. The flood routing results show that the highest elevation is +154.05 at ten time. Comparison between the highest elevation of Q 100 years flood routing results which is equal to +154.05 is lower when compared to the maximum elevation of the Jatibarang dam spillway which is equal to +155.3; so that the main spillway elevation is still able to overcome of Q 100 years. Thus the Jatibarang dam spillway is still safe against the highest elevation of flood Q 100 years.
KAPASITAS LENTUR BALOK BETON BERTULANG DENGAN POLYPROPYLENE FIBER SEBESAR 6% DARI BERAT SEMEN Apriyatno, Henry
Jurnal Teknik Sipil dan Perencanaan Vol 11, No 2 (2009): Jurnal Teknik Sipil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v11i2.1723

Abstract

The addition of fiber (fiber) in the concrete mixture is to debone the concrete where thefiber is spread evenly into the concrete mixture with random orientation, so as to prevent theoccurrence of micro cracks. The addition of polypropylene fiber is intended to support the internalstresses (axial, bending and shear) is greater. The study aims to determine the flexural capacity ofconcrete beams reinforced with polypropylene fiber at 6% of cement weight. Split tensile strength ofconcrete will increase by approximately 36.78%, while the modulus of elasticity of a decline, adecline of about 5.4% of conventional concrete. Strong increase in the beam line optimally will beobtained when the fiber concrete is placed only partially in the appeal, the proportion of 75% of thetotal look of the block .. Increased flexibility of polypropylene fiber beam 22.6% for the BPF-100,BPF-75, BPF-50, and increased 9.7% for BPF-25 than normal concrete. Penambahan serat (fiber) pada adukan beton adalah menulangi beton dimana fiberdisebarkan secara merata kedalam adukan beton dengan orientasi acak, sehingga dapatmencegah terjadinya retakan mikro. Penambahan polypropylene fiber dimaksudkan dapatmendukung tegangan-tegangan internal (aksial, lentur dan geser) yang lebih besar. Penelitianbertujuan untuk mengetahui kapasitas lentur balok beton bertulang dengan polypropylene fibersebesar 6% dari berat semen. Kuat tarik belah beton akan meningkat sekitar 36,78 %, sedang nilaimodulus elastisitas terjadi penurunan, penurunan sekitar 5,4 % dari beton konvensional.Peningkatan kuat batas balok secara optimal akan diperoleh bila beton fiber hanya ditempatkansecara parsial pada bagian tarik, proporsi 75 % dari luas tampang balok.. Peningkatan kelenturanbalok polypropylene fiber sebesar 22,6 % untuk BPF-100, BPF-75, BPF-50, dan meningkat 9,7%untuk BPF-25 dibandingkan beton normal.

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