Jurnal Rekayasa Sipil dan Desain
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Pengaruh Panas Hidrasi Semen Terhadap Perilaku Deformasi Beton Kolom Usia Dini
Full text linkBeton pada usia dini mengalami deformasi termal akibat panas yang dihasilkan oleh reaksi hidrasi semen. Deformasi ini dapat menyebabkan keretakan pada beton. Penelitian ini bertujuan untuk mengetahui pengaruh panas hidrasi semen terhadap perilaku deformasi pada kolom beton usia dini. Penelitian dilakukan secara eksperimental pada 3 sampel beton kolom berukuran 15 cm × 15 cm × 100 cm dengan kuat tekan rencana 20,75 MPa, menggunakan portland composite cement (PCC). Sampel ditutup dengan styrofoam segera setelah pengecoran. Penelitian ini mempelajari perilaku kolom beton dan suhu di dalamnya menggunakan alat embadded vibrating wire strain gauge yang ditanam pada tiap sampel. Posisi EVWSG berada pada 45 cm dari bagian bawah benda uji. Pengamatan dilakukan selama 24 jam dengan rentang setiap 15 menit. Hasil penelitian menunjukkan perilaku deformasi dan perubahan suhu dalam beton kolom memiliki pola yang mirip. Nilai minimum dan maksimum deformasi dan suhu dalam beton secara berurutan terjadi pada umur 0 jam dan 7,75 jam sebesar 5,4000E-0,7 (m/m) dengan suhu 29,5 ⁰C dan 5,6808E-0,5 (m/m) dengan suhu 36,1 ⁰C dan rata-rata deformasi sebesar 3,0341E-0,5 dengan rata-rata suhu 32⁰C. Kata kunci : Hidrasi semen, deformasi, kolom beton, suhu dalam beton
Evaluasi Kinerja Struktur Gedung Bertingkat dengan Metode Analisis Pushover (Studi Kasus: Gedung 6 Rumah Sakit Pendidikan Perguruan Tinggi Negeri (RSPTN) Universitas Lampung)
Full text linkThe high potential for earthquake in Indonesia encourages the design of buildings to be resistant towards earthquake vibrations. The level of vulnerability to lateral forces, especially earthquake shocks, is closely related to the height of the building. Therefore, the design of multi-storey building structures must be designed by analyzing earhquake loads with the aim of preventing the building from collapsing and reducing the number of fatalities due to earthquakes. This research takes a case study at Building 6th of the State University Education Hospital of University of Lampung using a performance-based seismic design approach, which involves the use of non linear pushover analysis techniques based on ATC-40 (capacity spectrum method) and FEMA-356 (displacement coefficient method). The result of the pushover analysis are capacity curves, building displacement targets, building collapse schemes, and result of building performance evaluations against earthquake loads based on ATC-40 and FEMA-356 regulations. The analysis result show that the level of building performance in the x-direction and y-direction with the maximum total drift ratio parameter based on ATC-40 and FEMA-356 is Immediate Occupancy, so it can be concluded that the building is still able to withstand when an earthquake occurs and the risk of human loss is very small
Kajian Implementasi Rencana Mutu Kontrak pada Proyek Irigasi Berdasarkan Metode Analisis Deskriptif
Full text linkProject quality management is a process to keep the project still fulfilled the quality level based on the demand or plan. Quality Plan Agreement is Quality Management System document that is very important in construction project. This research’s aims are to assess the quality implementation level based on Descriptive Analysis Method on Upgrading Irigation Area Project Way Sekampung, Ground Sub-Job. Primary data is obtained by providing questionnaries within 39 questions to 8 respondents and secondary data is obtained by observation and documentation in project site. Descriptive Analysis obtaining 51,28% respondents answer Good; 27,56% respondents answer Very Good; 16,67% respondents answer Acceptable; 4,17% respondents answer Not Good; and 0,32% respondents answer Very Not Good
Pengaruh Abu Ketel sebagai Bahan Penambah Campuran Beton Normal terhadap Kuat Tekan
Full text linkMuch of the kettle ash waste found in palm oil mills is wasted and can pollute the environment. Therefore, efforts need to be made to handle this waste. One of them is its use as an additional ingredient in concrete mixtures. . This research aims to analyze the effect of kettle ash on the rate of increase in compressive strength through laboratory testing with variations in kettle ash used, namely 0%, 5%, 10%, 15% and 20% of the cement weight. The test specimens have dimensions of 15 cm x 15 cm x 15 cm with testing times at 3 days, 7 days, 14 days, 28 days and 56 days. Based on analysis of research data, it was found that the majority experienced an increase in the compressive strength of concrete without additional materials. Increases occurred at 3 days, 7 days, 14 days and 28 days. The percentage increase in compressive strength for the majority decreased at the age of 3 days, 7 days, 14 days. Meanwhile, at the age of 56 days the majority experienced an increase in the percentage of compressive strength which was caused by a quite significant increase in compressive strength. The highest compressive strength at 56 days was produced by test object code BAK 1 of 38.59 MP
Analisis Tundaan Kendaraan Akibat Weaving Di Jalan Diponegoro Menggunakan Metode Gap Acceptance
Full text linkThe slowing down of vehicle speed that occurs on Jalan Diponegoro is caused by the behavior of vehicles that make intertwining movements (weaving). This condition causes vehicles traveling straight to reduce vehicle speed due to the presence of vehicles entering from Jalan Dr. Cipto Mangunkusumo towards Jalan Diponegoro. Queues that occur on Jalan Diponegoro cause a narrowing of the road, which can cause travel delays. The aim of this research is to analyze travel delays due to interwoven conflicts or weaving that happened on Jalan Diponegoro. This research was analyzed using the method gap acceptance. According to the results of data processing analysis and literature studies, the delay time was 23.28 seconds in the morning and 13.77 seconds in the afternoon for each 5 minute time interval. Key words: Travel Delay, InterwovenConflict, Gap Acceptance
Daya Lenting Akar Mangrove Rhizophora sp. sebagai Peredam Gelombang (Studi Kasus Pantai Dewi Mandapa, Pesawaran)
Full text linkHutan mangrove adalah sekelompok pohon atau tumbuhan yang hidup dengan kesamaan adaptasi morfologi dan fisiologi terhadap habitat yang dipengaruhi pasang surut. Gelombang laut menyebabkan abrasi di sekitar pesisir pantai. Daya lenting mangrove memberikan kontribusi besar terhadap peredam gelombang.Tujuan penelitian adalah untuk mengetahui daya lenting akar tunjang mangrove Rhizophora sp. sebagai peredam gelombang.Metode digunakan pada penelitian ini adalah metode Transek-kuadrat oleh Wantasen tahun 2002 untuk menghitung cakupan daerah penelitian. Pengujian dilakukan menggunakan alat Control Universal Testing Machine dan dilakukan uji tarik untuk mendapatkan nilai gaya yang dapat ditahan oleh satu akar mangorve. Hasil pengolahan di peroleh pada ketebalan 10 meter, kelentingan akar tunjang mencapai 2,7380E+03 J/m2 dengan energi gelombang yang bisa ditahan sebesar 2,97726E-01 J/ms. Namun, pada ketebalan 50 meter, kelentingan turun menjadi 2,2041E+03 J/m2 dengan energi teredam sebesar 2,99245E-01 J/ms. Kesimpulannya adalah daya lenting akar tunjang oleh mangrove Rhizophora sp memiliki data lenting yang baik dalam meredam gelombang, daya lenting akar mangorve akan meningkat seiring dengan bertambahnya jumlah akar mangrove pada suatu area sehingga energi peredaman meningkat
Implementasi Building Information Modeling (Bim) Dalam Analisis Waste Material Tulangan Kolom Pada Gedung LVP Production Indonesia
Full text linkThe rapid development of information technology, especially in the construction sector, has become an important issue in supporting the country's infrastructure needs to produce increasingly high-quality, integrated, and efficient infrastructure products. Therefore, the utilization of Building Information Modeling (BIM) technology has become an alternative that allows construction stages to be faster and more efficient, especially in minimizing waste material. This research aims to determine the influence of applying BIM concepts in optimizing waste materials for column reinforcement of type 1, type 2, and type 3. The research begins with data collection, structural 3D modeling, reinforcement modeling, input of reinforcement mark schedules, clash detection, Bar Bending Schedule (BBS) output, cutting lists, and waste material analysis. The research results show that the total weight requirement of type 1 column reinforcement is 28,449 kg, type 2 column is 26,390 kg, and type 3 column is 26,784 kg, while the total waste weight of type 1 column is 1,256.41 kg, type 2 is 872.6 kg, and type 3 is 916.14 kg. The waste level of type 1 column reinforcement is 4.42%, type 2 column is 3.31%, and type 3 column is 3.42%. Thus, it can be concluded that type 2 column reinforcement is more effective and efficient compared to type 1 and 3 column reinforcement
Pengaruh Penambah Ekstraksi Bubuk Lindi Hitam Terhadap Limbah Aspal Bekas Pakai
Full text linkJalan yang sering dilalui kendaraan berat, mengakibatkan penuaan aspal yang dapat menurunkan kualitas aspal tersebut. Inovasi yang dilakukan, yaitu memanfaatkan limbah aspal yang termodifikasi dengan ekstraksi bubuk lindi hitam atau lignin. Penelitian ini untuk mengetahui karakteristik pengikat aspal bekas pakai dengan tambahan lignin dengan kadar 0%, 3%, dan 6%. Pengujian reologi aspal meliputi berat jenis, penetrasi, daktilitas, titik lembek, viskositas.Penelitian ini menunjukkan bahwa aspal bersifat sangat kaku dan membutuhkan suhu yang sangat tinggi untuk mencair. Hasilnya terbukti dari titik lembek tertinggi (78,5°C pada kadar lignin 6%), penetrasi terdalam (9,33 mm pada kadar lignin 0%), daktilitas terpendek (4,15 cm pada kadar lignin 6%), nilai viskositas yang mendekati spesifikasi bina marga (3592,205 cSt pada lignin 3%), Kesimpulannya, bahan zat aditif lignin mampu membuat aspal semakin kaku dan keras dan tidak baik untuk bahan peremajaan aspal
Analisis Hidrolika dan Perencanaan Tinggi Jagaan (Freeboard) Jembatan Kereta Api (BH-116 KM.63+317) pada Sungai Way Seputih
Full text linkEvaluasi kondisi jembatan eksisting dilakukan sebagai acuan dalam perencanaan ulang suatu jembatan dalam hal ini jembatan kereta api jalur ganda pada sungai Way Seputih, kecamatan Seputih Agung, Lampung Tengah dengan beberapa kriteria yang harus terpenuhi diantaranya tinggi jagaan. Proses evaluasi diawali dengan analisis hidrologi menggunakan metode HSS Nakayasu untuk periode ulang 5,10, 25, 50 dan 100 tahun kemudian dilakukan analisis hidraulika menggunakan perangkat lunak HEC-RAS v5.0.7. Diperoleh debit banjir sebesar 444.532 m3/s, 544.032 m3/s, 695.973 m3/s, 830.442 m3/s dan 985.386 m3/s dan nilai elevasi muka air banjir secara berturut-turut yaitu +28.44 m, +29.00 m, +29.66 m, +30.16 m dan +30.71 m serta nilai tinggi jagaan jembatan eksisting berdasarkan elevasi MAB yaitu 11.56 m, 11.00 m, 10.34 m, 9.84 m dan 9.29 m untuk kala ulang 5,10,25,50 dan 100 tahun. Sehingga disimpulkan jembatan eksisting dinilai aman terhadap muka air banjir dan elevasi gelagar terbawah pada jembatan jalur ganda direncanakan mengikuti elevasi gelagar terbawah jembatan eksisting.
STUDI PERBANDINGAN PEMBEBANAN DINAMIS PADA JEMBATAN BETON TERHADAP PEMODELAN FEA
Full text linkThe natural frequency of the bridge is the frequency to determine the theoretical and experimental feasibility requirements of the bridge. The natural frequency value is used to determine the theoretical and experimental feasibility requirements of the bridge. Analysis of bridge behavior in resisting dynamic loads and comparing theoretical natural frequencies with field tests on prestressed concrete bridges with a span of 40 m using the line model and the shell model in the sap2000 application. Based on the results of bridge modeling using SAP 2000, the natural frequency on the model line is f○ 3.9876 hz and T 0.2507 seconds, while in shell modeling it is obtained f○ 16.045 hz and T 0.6232 seconds. When given a running load the frequency of the bridge in the shell model is f 15.577 hz and T 0.0642 seconds. The natural frequency value obtained from the model line is 3.9876 hz and the natural frequency from the shell model is 16.045 hz which in the shell model the frequency results are closer to the field test results of 16.67 hz with a ratio of 3.75%. The shell model is used as a comparison to the field model