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All Journal TEKNIK MEDIA KOMUNIKASI TEKNIK SIPIL JURNAL KARYA TEKNIK SIPIL
Siti Hardiyati
Departemen Teknik Sipil FT. UNDIP JL. Prof. H. Soedarto SH., Tembalang, Semarang 50275
Civil Engineering, Building, Construction & Architecture Engineering

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Optimasi Distribusi Lubang Pada Balok Baja Kastela Partono, Windu; Sukamta, Sukamta; Hardiyati, Siti; Budi, Listiyono
TEKNIK Vol 39, No 1 (2018): (July 2018)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1156.574 KB) | DOI: 10.14710/teknik.v39i1.12234

Abstract

Balok baja kastela adalah profil baja yang dikembangkan dari profil I yang dipotong bagian badan dan disambung lagi sedemikian rupa sehingga membentuk lubang pada bagian badan.  Bentuk lubang profil balok baja kastela pada umumnya adalah persegi enam (heksagonal). Pembuatan balok baja kastela perlu memperhatikan jarak antar lubang agar balok mempunyai kemampuan menahan beban tertinggi. Tulisan ini menyajikan hasil penelitian untuk menentukan jarak antar lubang yang optimum pada balok baja kastela dengan mempertimbangkan distribusi tegangan, deformasi, dan kelelehan pada balok tersebut. Penelitian diawali dengan perhitungan menggunakan metode Elemen Elemen Hingga (Finite Element Method /FEM) kemudian dilanjut dengan pengujian di laboratorium. FEM dilakukan untuk menentukan ukuran dan jarak antar lubang optimum pada balok kastela. Variasi sudut bukaan lubang dilakukan antara 45o sampai 70o. Hasil analisis FEM kemudian diujikan di laboratorium dengan ukuran dan jarak antar lubang optimum untuk mengevaluasi perbedaan hasilnya. Hasil penelitian menunjukkan lubang profil dengan kemiringan antara 45o sampai 70o sebaiknya dibuat dengan jarak antar lubang antara 0.1 sampai 0.25 dari tinggi profil balok kastela dengan distribusi lubang terbaik adalah antara 5 sampai 7 lubang per meter.
Stabilisasi Tanah Lempung dengan Mengunakan Larutan Asam Sulfat (H2so4) pada Tanah Dasar di Daerah Godong - Purwodadi Km 50 Kabupaten Grogogan Prabandiyani RW, Sri; Hardiyati, Siti; Muhrozi, Muhrozi; Pardoyo, Bambang
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 21, Nomor 1, JULI 2015
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (892.246 KB) | DOI: 10.14710/mkts.v21i1.11227

Abstract

An expansive clay soil material that is composed of various minerals include kaolinite, montmorillonite and illite group. Mineral montmorilinite have the sensitivity to the effects of the water is very easy to expand and contract. High and low levels of development (swelling) and shrinkage (shrinkage) expansive clay is determined by the high and low content of montmorillonite on expansive clay granules. Because of these properties are very high content of montmorillonite often cause problems in the building. This study uses a solution of sulfuric acid (H2SO4) as a stabilizer through the compaction process Modified Proctor on OMC Proctor standard by the number of collisions each is 10 x, 25 x and 56 x, and the amount of additional water in cc on dry ground, with variations in increments of 100%, water by 90%:10% H2SO4, water by 80%: 20% H2SO4 and water by 90%: 30% H2SO4. This research was conducted testing-testing in the laboratory include: physical properties, mechanical properties. swelling pressure, swelling potential and CBR with curing and no curing. Results of the test-the test, can increase the value of physical and mechanical properties, while pergujian against swelling pressure and swelling potential is not significantly increased.
STUDI PEMETAAN TANAH CLAY SHALE PADA DAERAH METESEH ; JABUNGAN SEMARANG BERDASARKAN HASIL PENGUJIAN SLAKE DURABILITY Utomo, Dani Lukmito; Trinalda, Heins Christian; Prabandiyani R. W., Sri; Hardiyati, Siti
Jurnal Karya Teknik Sipil Volume 7, Nomor 4, Tahun 2018
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

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Abstract

ABSTRAK Penelitian mengenai “Pemetaan Tanah Clay Shale Pada Daerah Meteseh - Jabungan Semarang Berdasarkan Hasil Pengujian Slake Durability” ini dilatarbelakangi Kota Semarang yang memiliki potensi yang besar sebagai wilayah pengembangan pusat pertumbuhan karena wilayahnya yang strategis di provinsi Jawa Tengah, namun Kota Semarang menghadapi permasalahan terkait dengan potensi gerakan tanah yang diakibatkan tanah Clay Shale. Pemetaan tematik ini diharapkan dapat membantu pada perencanaan pembangunan di wilayah Semarang, terutama pada kasus ini pada daerah Meteseh – Jabungan sebagai lokasi penelitian. Penelitian ini menggunakan data sampel di lapangan, Peta Geologi Magelang dan Semarang dan Peta Citra Satelit. Hasil dari Penelitian ini adalah Peta Klasifikasi Indeks Free Swelling, Peta Klasifikasi Indeks Plastisitas, Peta Nilai Indeks Slake Durability dan Peta Nilai Shale Rating. Dari peta-peta tersebut dapat diterapkan sebagai acuan beberapa hal aplikasi pada bidang Teknik Sipil seperti penggunaan material Clay Shale sebagai timbunan (desain material dan pemadatan tanah) dan pemotongan lereng Clay Shale.
STABILISASI TANAH DENGAN FLY ASH DAN SEMEN UNTUK BADAN JALAN PLTU ASAM-ASAM Huri, Andreas Dharmawan; Yulianto, Kristian; Retno Wardani, Sri Prabandiyani; Hardiyati, Siti
Jurnal Karya Teknik Sipil Volume 2, Nomor 1, Tahun 2013
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (551.884 KB)

Abstract

The huge amount of coal waste (fly ash) produced by Acid plant could be use the main material for soil stabilizing at thr road ro plant acids Because it has the CBR value ≤ 6% is 3.52% roomates minimum limits allowed by SNI 03-1744-1989 and also to solve enviromental pollution problems, but certainly how much fly ash is used in order not to polute the environment Necessary to conduct futher research.In this research, the chemical stabilization method used to repaired the base soil condition is by the base soil mix with a combine of protland cement and fly ash as stabilizing agent in various ratios; 4% PC + 5% FA, 4% PC + 8 % FA, 4% PC + 10% FA, 2% PC + 7% FA, and 4.5% PC + 8% FA by weight of dry soil. The result of original soil tests indicate the clasification is clay with high plasticity (CH) According to the Unified System and grade A-7-6 According to AASHTO. The result of CBR test with various mixed ratio in soaked condition by 0, 4, and 7 days show the CBR value is increasing. The maximum increase of is%, happened in various optimum mix ratio of 4% PC + 8% FA for 4 days of soaked time. The conclusion is that the optimum use of fly ash at 8% could be used to solve environmental pollution problems and also used as stabilizing agent at the road to the power plant Acid.
KAJIAN STRUKTUR PENGAMAN PANTAI SIGANDU, BATANG Widhianto, Sidiq Leonanda; Kharisma, Dicki; Suharyanto, Suharyanto; Hardiyati, Siti
Jurnal Karya Teknik Sipil Volume 3, Nomor 4, Tahun 2014
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (556.495 KB)

Abstract

Generally, the problems that occur in Sigandu Beach - Batang is abrasion, resulting in damage to the beach. This has an impact on the coastal areas along the coast of Sigandu, among others land that has been covered with sea water exceeds 2 m within 5 months, trees and houses around the beach collapsed due to erosion beach by sea water. The information and supporting data are collected from several literatures, interview, laboratory research, and a collection of documents from several institutions, including the Department of Marine and Fishery of Batang, BPDP and BPPT of Yogyakarta in 2013, BMKG Climatology Station in Semarang, Soil Mechanics Laboratory of Diponegoro University and several other institutions. The dominant wind direction effect used in the calculations come from the Northwest and North. Wave height representative used a H33% at 2,94 m and a representative period T33% 8,82 seconds. Sea level caused of tide by the calculation of admiralty generating value HWL =+0.49 m; MSL = ± 0.00 m; LWL = -0.49 m. The tide of Sigandu Beach included in mixed tide prevailing semidiurnal. In the calculation, the wave breaking occurs at a depth of 4.22 m at a distance of ± 787.09 meters from the shoreline. Based on studies of the selection safety structure from some aspects of the Sigandu Beach, the elected lower threshold breakwater structure (Pegar) Geotube. Because a bad soil conditions in Sigandu Beach, then there needs to be retaining structures on Geotube is by giving it a pile of bamboo and bamboo mattresses that had been assembled under the structure of Geotube. Geotube structure is composed of Giant Sand Bag with dimension length 20 m, width 2 m and 1,5 m high with a weight of 6 tons/m' and Sand Bag with dimension length 2,2 m, width 1,4 m, and height 0,4 m with a weight of 1,12 tons/m'. To be expected to form the salient, the structure compiled in series with spacing distance of 10 m with a 100 m length of the building and placed 75 m from the shoreline.
Co-Authors Andreas Dharmawan Huri Bambang Pardoyo Dicki Kharisma, Dicki Kristian Yulianto Listiyono Budi Luh Made Indah Sri Handari Adiputra muhrozi muhrozi, muhrozi Prabandiyani R. W., Sri Sidiq Leonanda Widhianto, Sidiq Leonanda Sri Prabandiyani Retno Wardani Sri Prabandiyani RW, Sri Sukamta Sukamta Trinalda, Heins Christian Utomo, Dani Lukmito Windu Partono