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Rini Kusumawardani, Rini
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Sediment Characteristic of Pagai Strait, Mentawai Mutmainah, Herdiana; Kusumawardani, Rini
Jurnal Teknik Sipil dan Perencanaan Vol 21, No 1 (2019): Jurnal Teknik SIpil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v21i1.19914

Abstract

Abstract. The marine sediment is important indicator of the seafloor. The characteristics of marine sediments can be seen from grain size, type and Total Dissolved Solid (TDS). Sediments derived from organic and non-organic particles are carried by the sea currents, waves, streams and tidal process in the coastal areas. At very high levels, sediments can cause pollution or vulnerability such as decreasing of dissolved oxygen, coral bleaching, and increased the eurotrification processes. Pagai Strait is located between North Pagai Island and South Pagai. This strait has enormous potential and it is used by the surrounding community for various activities such as port and sea transportation, fishery, marine aquaculture and tourism. This study aims to determine the characteristics of sediment in Pagai Strait. The field survey was conducted in September 2016 for waves, currents, water quality and sediment samples with purposive sampling method. The results showed that the average of sediments in Pagai Strait is D35 sized 0.155 mm; D50 sized 0.273 mm; and D90 sized 1.574 mm with specific gravity 2.665 gr/cm3 and dominated by sand 66.88%. TDS between 51.6 to 55.0 mg/L, appropriate for port and mangrove. Scale of sediment, A = 0.119 and sediment velocity is 0.002 m/s. Sediment transport approximately is 0.389 m3/day.
PEMILIHAN DISTRIBUSI PROBABILITAS PADA ANALISA HUJAN DENGAN METODE GOODNESS OF FIT TEST Upomo, Togani Cahyadi; Kusumawardani, Rini
Jurnal Teknik Sipil dan Perencanaan Vol 18, No 2 (2016): Jurnal Teknik Sipil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v18i2.7480

Abstract

Rainfall event is a stochastic process, so to explain and analyze this processes the probability theory and frequency analysisare used. There are four types of probability distributions.They are normal, log normal, log Pearson III and Gumbel. To find the best probabilities distribution, it will used goodness of fit test. The tests consist of chi-square and smirnov-kolmogorov. Results of the chi-square test for normal distribution, log normal and log Pearson III was 0.200, while for the Gumbel distribution was 2.333. Results of Smirnov Kolmogorov test for normal distribution D = 0.1554, log-normal distribution D = 0.1103, log Pearson III distribution D = 0.1177 and Gumbel distribution D = 0.095. All of the distribution can be accepted with a confidence level of 95%, but the best distribution is log normal distribution. Kejadian hujan merupakan proses stokastik, sehingga untuk keperluan analisa dan menjelaskan proses stokastik tersebut digunakan teori probabilitas dan analisa frekuensi. Terdapat empat jenis distribusi probabilitas yaitu distribusi normal, log normal, log pearson III dan gumbel. Untuk mencari distribusi probabilitas terbaik maka akan digunakan pengujian metode goodness of fit test. Pengujian tersebut meliputi uji chi-kuadrat dan uji smirnov kolmogorov. Hasil pengujian chi kuadrat untuk distribusi normal, log normal dan log pearson III adalah 0.200, sedangkan untuk distribusi gumbel 2.333. Hasil pengujian smirnov kolmogorov untuk distribusi normal dengan nilai D = 0.1554, distribusi log normal dengan nilai D = 0.1103, distribusi log pearson III dengan nilai D = 0.1177 dan distribusi gumbel dengan nilai D = 0.095. Seluruh distribusi dapat diterima dengan tingkat kepercayaan 95%, tetapi distribusi terbaik adalah distribusi log normal.
PERBANDINGAN ANALISA PERHITUNGAN BETON STRUKTURAL PADA PROYEK PEMBANGUNAN GEDUNG F UNIVERSITAS PEKALONGAN Pangestuti, Endah Kanti; Kusumawardani, Rini Kusumawardani; Priaji, Aprindra; Nikmah, Dewi Lailatul
Jurnal Teknik Sipil dan Perencanaan Vol 18, No 2 (2016): Jurnal Teknik Sipil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v18i2.7482

Abstract

The construction of Building F Universitas Pekalongan consists of 8 levels. It used Contruction and Planning regulation of SK SNI T-15-1991-03 especially about structural concrete works. This Building F construction will be reviewed its construction planning using SNI 03-2847-2013 (Requirements Procedures of Structural Concrete for Building), SNI 1726-2012 (Procedures of Earthquake Resistance Planning for Building). The review will focus on upper structure including columns, beams, plates and ladder. Modeling analysis for upper structure uses software SAP 2000 v.17.  This construction used dead loads, live loads and seismic loads. The objective of this SNI review is comparing the formulation procedures of concrete structures and understanding the review procedures of SNI. The results showed that in the upper structure calculation was increasing in 1,43% of beams and columns dimensions. The analysis using SAP2000 v.17 showed bigger dimensions which means that the Building F structural elements were save  with seismic loading (based on analysis). Proyek Pembangunan Gedung F Universitas Pekalongan ini terdiri dari 8 lantai. Pada perencanaannya menggunakan pedoman pelaksanaan pekerjaannya dengan SK SNI T-15-1991-03 terutama yang menyangkut pada pekerjaan beton struktur, sedangkan dalam hal ini akan diperbaharui dengan meninjau ulang perencanaan pembangunannya dengan mengacu pada SNI 03-2847-2013 (Tata Cara Persyaratan Beton Struktural Untuk Bangunan Gedung), SNI 1726-2012 (Tata Cara Perencanaan Ketahanan Gempa Untuk Bangunan Gedung). Proyek Pembangunan Gedung F Universitas Pekalongan ini akan meninjau ulang pada struktur atas. Struktur atas meliputi kolom, balok, pelat, dan tangga. Analisis permodelan struktur atas dengan menggunakan software SAP 2000 v.17. Beban yang digunakan untuk Proyek Pembangunan Gedung F Universitas Pekalongan pada elemen strukturnya yaitu beban mati, beban hidup dan beban gempa. Tujuan dari perbandingan SNI ini adalah membandingkan tata cara perhitungan struktur beton, mengetahui tata cara yang di perbaharui pada SNI. Pada perhitungan struktur atas terjadi kenaikan terhadap dimesi balok dan kolom yaitu sebesar 1,43 %. Perhitungan analisis dengan menggunakan program SAP2000 v.17 dan  menghasilkan dimensi yang lebih besarmenunjukkan bahwa elemen struktur Gedung F Universitas Pekalongan ini aman secara analisis dengan pembebanan gempa.
Ground Vibration Analysis of Railroad Dynamic Loads on Rail Structure Kusumawardani, Rini; Zelin, Mufita Aulia; Kusbiantoro, Arief
Jurnal Teknik Sipil dan Perencanaan Vol 21, No 2 (2019): Jurnal Teknik Sipil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v21i2.20957

Abstract

The railroad structure consists of rail steel, sleepers, fastening, ballast, sub-ballast and subgrade. The load of the passing train at a certain speed can produce vibrations channeled through the train wheels to the railway steel to be forwarded to the sleepers then to the ballast and distributed to the subgrade. The amount of vibration caused by the train can be seen from the value of the acceleration, amplitude and frequency of the vibration. In this study, the accelerometer sensor was used to detect the magnitude of the vibration acceleration. The vibration acceleration data was then processed using Geopsy software to obtain the value of natural frequency and vibration amplitude using the HVSR (Horizontal to Vertical Spectral Ratio) method. The value of acceleration due to railroad vibration of 0.14 g - 0.64 g with a position placed 1.5 m sensor from the edge of the rail. The biggest vibration acceleration is 0.26 g x direction, 0.39 y direction and 0.29 z direction caused by Maharani trains that pass at a speed of 65 km / h and a load of 728 tons. The natural frequency of vibration obtained value 2.4077 Hz - 5.392 Hz. The highest natural frequency was caused when the Maharani train, which was 5.392 Hz. Train speed and load affected the vibration of the rail structure. The acceleration of vibration increased when the train speed and load increased
PROSEDUR ANALISIS LIQUEFACTION DENGAN MENGGUNAKAN METODE SEMI EMPIRIS Kusumawardani, Rini
Jurnal Teknik Sipil dan Perencanaan Vol 11, No 1 (2009): Jurnal Teknik Sipil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v11i1.6961

Abstract

Liquefaction is defined as a phase of soil transition; a form of transformation from solid to liquefied state in such condition of poor drainage during a cyclic loading. This transformation is triggered by the pore water pressure accumulation, which then decreases the effective stress of soil and thus reaches a ruptured condition. The escalating pore water pressure in an undrained loading circumstance is the main factor of all phenomena of liquefaction. The previous studies considered only the sand or deposits of sand that are possible to give the affect of liquefaction. But the earthquake in Mexico (1985) revealed that the deposits of clay could also instigate liquefaction. It stimulates researchers to observe comprehensively the characteristics of clay latent as a set of liquefaction.Liquefaction didefinisikan sebagai perubahan fase tanah dari fase padat menjadi fase cair diakibatkan karena kondisi drainasi yang tidak bagus ketika diberikan beban siklik. Perubahan ini dipicu adanya peningkatan tekanan air pori sehingga mengakibatan terjadinya penurunan tekanan efektif tanah dan  akhirnya mencapai kondisi keruntuha tanah. Peningkatan tekanan air pori dalam keadaan tidak terdrainasi adalah penyebab utama terjadinya  fenomena liquefaction. Penyelidikan-penyelidikan sebelumnya hanya menyatakan bahwa fenomena liquefaction hanya terjadi pada tanah pasir atau deposit tanah. Tetapi gempa bumi di Mexico (1985) menunjukkan bahwa deposit tanah lempung  juga bias menjadi pemicu liquefaction. Hal tersebutlah yang menjadi pemicu para peniliti untuk menganalisis secara menyeluruh tentang liquefaction yang bias dipicu oleh keberadaan tanah lempung pada suatu lapisan tanah
FUNNY HAND PUPPET STORY TELLING SEBAGAI METODE PENGENALAN BENCANA LONGSOR Kusumawardani, Rini; Andiyarto, Hanggoro Tri Cahyo; Fansuri, Muhammad Hamzah; Anggraini, Kurnia Dwi; Mindiastiwi, Tigo
Jurnal Teknik Sipil dan Perencanaan Vol 18, No 1 (2016): Jurnal Teknik Sipil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v18i1.6691

Abstract

Indonesia, as a tropical region, shows high potential for rainfall. At highlands, enormous rainfall triggers both soil and coastal erosion. Landslides are frequently occured in Semarang in which some of whose areas are indicated as highlands with unstable soil. This study was carried out in DeliksariSukerejo, Gunungpati sub-district of Semarang. Various effort have been done to prevent the disaster such as socialization of preventing landslide given by government, private institutions, colleges, and non-governmental organizations. However, most of those method only involve for the adults, involving of the children in effort to understandthe disaster mitigation concept are less. One of the effort used was FHP (Funny Hand Puppet) Story Telling. This method tried to draw children’s attention by handy-puppets shows, so the the purpose which is hoped could be well-transferred. As many as 24 children attended this shows. From the pre-test, it was gained 84.3% of those who did not know simple ways to avert the landslide. After the socialization had been given, post-test results showed 94.8% of the children significantly understood the danger of landslide. From the results depicted the increasing of landslide awareness as 10.5%. All respondent were children between 4-13 years old.This method provided broader education about landslide happening in their surroundings.  Indonesia sebagai negara tropis memiliki potensi curah hujan yang tinggi. Pada daerah perbukitan, curah hujan yang tinggi merupakan faktor pemicu terjadinya longsoran baik pada tanah maupun batuan. Bencana longsor juga sering terjadi di kota Semarang yang sebagian wilayahnya perbukitan dengan kondisi tanah yang tidak stabil. Dilaksanakan penelitian yaitu di kawasan Dukuh Deliksari, Kelurahan Sukorejo, Kecamatan Gunungpati Semarang. Berbagai upaya telah dilakukan dalam pencegahan bencana tersebut, misalnya sosialisasi pencegahan bencana longsor yang dilakukan oleh pemerintah, swasta, perguruan tinggi, dan LSM. Kebanyakan upaya tersebut hanya melibatkan orang dewasa, sehingga anak-anak belum memiliki pemahaman sejak dini mengenai lingkungan tempat tinggal mereka yang rawan longsor. Salah satu metode yang digunakan adalah FHP (Funny Hand Puppet) Story Telling. Metode ini mencoba menarik perhatian anak-anak dengan menggunakan boneka tangan yang ditujukan kepada anak-anak sehingga pesan yang dibawa dapat tersampaikan dengan baik. Sebanyak 24 anak-anak yang mengikuti metode ini didapatkan dari hasil pre test 84,3% belum mengetahui cara sederhana menangani bencana longsor. Hasil dari post testmenunjukkan bahwa 94,8% anak-anak menjadi lebih paham. Dengan hasil tersebut anak-anak mengalami peningkatan sebesar 10,5%. Melalui metode ini, sesungguhnya anak-anak mendapatkan pendidikan yang jauh lebih luas tentang bencana longsor yang benar-benar terjadi di tempat mereka tinggal. 
ANALISIS DAYA DUKUNG PONDASI TIANG-RAKIT PADA DAERAH RAWAN GEMPA MENGGUNAKAN METODE POULUS DAN PROGRAM NUMERIS PLAXIS Kusumawardani, Rini; Apriyatno, Henry; Rachmawati, Rizky Julia; Anggraini, Ririn
Jurnal Teknik Sipil dan Perencanaan Vol 18, No 2 (2016): Jurnal Teknik Sipil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v18i2.7835

Abstract

Abstract: Yogyakarta are situated in the zone with high  potential of seismicity. Based on Indonesia map seismicity area, it categorized in a seismic zone 4.  The secondary effect of this earthquake  phenomena is a soll settlement due to of decreasng of void volume of soil mass. Based on these issues, the foundation system of building is the primary factor which must be considered. This paper revealed the comparation of foundation behavior due to static by using Poulos Method and PLAXS 2D. Pile-raft designed by Poulos method was chosen as a subject of research. Analysis of liquefaction potential, soil settlement, carrying capacity, and the safety factor was analyzed by using CYCLIC 1D, 2D PLAXIS and Methods Poulus. For analysis by the Poulus method reached a soil settelement 4.3 cm and a safety factor 10.76. While by using PLAXIS 2D obtained 0.30 cm and 2,088 for soil settlement and safety factor respectively. Furthermore, a seismic motion of 9.2 scale of Richter mgnitude are injected into analysis resistance of foundation. Abstrak: Kota Yogyakarta merupakan wilayah yang memiliki potesi sesismik yang tinggi berdasarkan peta potensi gempa Indonesia. Dalam peta tersebut dikatakan bahawa Kota Yogyakarta terletak pada zona seismik 4. Bahaya sekunder yang terjadi akbat peristiwa gempa adalah adanya penurunan tanah. Berdasarkan permasalahan ini,  pemilihansistem fondasi pada pada suatu bangunan adalah hal yang terpenting. Pada artikel ini dijelaskan mengenai perbandingan mengenai perilaku fondasi akibat beban statik meggunakan metode Poulos dan Plaxis 2D. Fondasi tiang rakit dianalisa dengan meggunakan metode Poulos dan Plaxis 2D. Analisis megenai potensi likuifaksi, penurunan tanah, daya dukung fondasi dan faktor kemanan struktur dianalisis menggunakan CYCLIC 1D, Plaxis 2D dan Metode Poulus. Untuk analisis menggunakan metode Poulos pada fondasi rakit-tiang diperoleh nilai penurunan 4,3 cm dan faktor keamanan 10,76.  Untuk analisis menggunakan Plaxis 2D diperoleh penurunan sebesar 0,30 dan angka keamanan pondasi tiang-rakit sebesar 2,088. Selain itu juga dilakukan analisis mengenai ketahanan fondasi ketika menerima beban gempa dengan skala magnitude 9.2 Richter.
PENGARUH DRAINASE HORIZONTAL PADA STABILITAS LERENG DENGAN METODE ELEMEN HINGGA Upomo, Togani Cahyadi; Kusumawardani, Rini; Nugroho, Untoro
PROSIDING SEMINAR NASIONAL & INTERNASIONAL 2018: SEMINAR NASIONAL PENDIDIKAN SAINS DAN TEKNOLOGI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (490.659 KB)

Abstract

The horizontal drains have been commonly used for slope stabilization. The effects of the horizontal drain analyzed by finite element method and the slope stability is evaluated by the global safety factor using simplified bishop method. The conclusions are obtained : firstly, the horizontal drains can more effective for lower the water table and increase the safety factor; second, the length of horizontal drains influence of the safety factor. The longer of horizontal drain can increase the safety factor. Keywords: safety factor, horizontal drain, slope stability
[RETRACTED] Identifikasi Gerakan Tanah Longsor Dengan Pendekatan Ground Shear Strain Menggunakan Pengukuran Mikroseismik di Graha Taman Nirwana Kota Semarang Supriyadi, Supriyadi; Hidayatullah, Rahmad Hafid; Aji, Mahardika Prasetya; Fitrianto, Taufik Nur; Kusumawardani, Rini
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 10, No 01 (2020): IJAP Volume 10 ISSUE 01 YEAR 2020
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (594.638 KB) | DOI: 10.13057/ijap.v10i01.24674

Abstract

This article was retracted due to the following reasons :Article: Identifikasi Gerakan Tanah Longsor dengan Pendekatan Ground Shear Strain Menggunakan Pengukuran Mikroseismik di Graha Taman Nirwana Kota Semarang, Vol. 10 No.1 (2020), pp: 32-36 Author: Supriyadi, R.H, Hidayatullah, Mahardika Prasetya Aji, Taufik Nur Fitrianto, Rini KusumawardaniThis article has been retracted by Publisher with the reason of improper data and error in data processing. All authors of the paper agreed with the reason.
Uji Durabilitas Jembatan Kereta Api dengan Menggunakan Analisis Mikrotremor Maulana, Adib; Kusumawardani, Rini
Dinamika Teknik Sipil: Majalah Ilmiah Teknik Sipil Vol. 13/No.2/Desember 2020
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1381.437 KB) | DOI: 10.23917/dts.v13i2.13055

Abstract

Jembatan adalah sarana yang menghubungkan jalan yang terpisah oleh sungai, lembah, laut, jalan atau rel kereta api. Berdasarkan fungsinya, jalan dibagi menjadi jembatan jalan dan jembatan rel kereta api. Penelitian ini membahas perilaku respons dinamik dari struktur jembatan. Dengan mencari nilai getaran, penelitian ini menggunakan sensor accelerometer dan alat seismic monitoring pada jembatan rangka batang. Sensor diletakkan pada setengah dan sepertiga bentang. Kemudian, hasil dari penelitian membandingkan respons jembatan ketika dilewati kereta api penumpang dengan kereta api barang. Ketika jembatan tidak dilewati beban, rentang frekuensi natural dan amplitudo jembatan sebesar 0.78Hz;1.82 sampai 3.73Hz;1.89. Ketika dilewati kereta, rentang frekuensi natural dan amplitudo menjadi 1.03 hz;1.70 sampai 5.77Hz;4.14. Perubahan ini diasumsikan karena adanya perbedaan kecepatan kereta api, beban kereta api dan perletakan sensor. Berdasarkan hasil penelitian, jembatan dapat menahan bahaya resonansi yang ditimbulkan oleh getaran tanah. Untuk pengukuran lebih lanjut, dibutuhkan pengukuran getaran jalan di dekat jembatan untuk mendapatkan analisis yang lebih lengkap.
Co-Authors -, Lashari - ., Lashari Adib Maulana Alfita Ilfiyaningrum Andyt Tegar Zakahfi Aprindra Priaji, Aprindra Arief Kusbiantoro Arief Kusbiantoro Bambang Suhendro, Bambang Cahyo A, Hanggoro Tri Dewi Lailatul Nikmah, Dewi Lailatul Dian Eka Aryanti Endah Kanti Pangestuti, Endah Kanti Ferdian - Prakasa, Ferdian - Fitrianto, Taufik Nur Hanggoro Tri Cahyo Hanggoro Tri Cahyo A, Hanggoro Tri Hanggoro Tri Cahyo Andiyarto, Hanggoro Tri Cahyo Henry Apriyatno Herdiana Mutmainah, Herdiana Hidayatullah, Rahmad Hafid Imelda Uli Vistalina Simanjuntak Kabul Basah Suryolelono Kirana Prasetya Azizah Kurnia Dwi Anggraini, Kurnia Dwi Lashari - -, Lashari - Lashari ., Lashari Mahardika Prasetya Aji, Mahardika Prasetya Marpaung, Bangun Maulana, Adib Muhammad Hamzah Fansuri, Muhammad Hamzah Naufal Hanif Nur Qudus Nurani Nanda Isnaeni Nurfitriyani, Sintya Andryati Prakasa, Ferdian - Ratna Dewi Kusumaningtyas Ririn Anggraini Rizky Julia Rachmawati, Rizky Julia Rr. Dewi Artanti Putri, Rr. Dewi Artanti Sabbah, Azzah Balqis Setiyo Budiyanto Supriyadi Supriyadi Tigo Mindiastiwi Togani Cahyadi Upomo Togani Cahyadi Upomo, Togani Cahyadi Tri Wahyu Kuningsih Untoro Nugroho Untoro Nugroho Yeri Sutopo Zakahfi, Andyt Tegar Zelin, Mufita Aulia