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All Journal Jurnal Ilmiah Elektronik Infrastruktur Teknik Sipil Jurnal Ilmiah Teknik Sipil Jurnal Spektran MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Teknik Sipil
Ida Ayu Made Budiwati
Program Studi Teknik Sipil Fakultas Teknik Universitas Udayana
Civil Engineering, Building, Construction & Architecture

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ANALISIS PERBANDINGAN PERILAKU SRUKTUR BAJA DIAGRID DENGAN RANGKA TERBREIS PADA GEDUNG 16 LANTAI Made Sukrawa; Ida Ayu Made Budiwati; I Gede Yoga Pratama
Jurnal Ilmiah Teknik Sipil Jurnal Ilmiah Teknik Sipil, Vol. 23, No. 2, Juli 2019
Publisher : Department of Civil Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (536.762 KB) | DOI: 10.24843/JITS.2019.v23.i02.p07

Abstract

Struktur rangka terbreis (BF) merupakan sistem rangka batang vertikal yang dapat memberikan ketahanan terhadap gaya lateral (gempa). Alternatif lain yang dapat digunakan untuk menahan beban lateral adalah dengan menggunakan sistem struktur diagrid (DIA) yang merupakan sistem struktur dengan breising diagonal dengan sudut tertentu yang sekaligus berfungsi sebagai kolom. Penelitian ini dilakukan untuk mengetahui perbandingan perilaku struktur baja DIA dengan BF. Struktur DIA dirancang dengan variasi kemiringan sudut 54o, 65o, 70o, dan 77o sedangkan struktur BF menggunakan tipe X-2 lantai pada gedung berukuran 25 m x 25 m dan tinggi total 56 m. Kedua sistem struktur didesain agar memenuhi simpangan antar lantai ijin tidak melebihi 0,020 hsx dan nilai stress ratio kurang dari 1,0. Hasil analisis menunjukkan bahwa model DIA 65 merupakan struktur yang paling kaku diantara model yang lainnya, sedangkan gaya-gaya pada model BF lebih kecil dari model DIA. Model DIA77 membutuhkan material baja yang paling sedikit, diikuti oleh DIA70, DIA65, DIA54 dan BF sedangkan Model BF memiliki jumlah sambungan yang paling sedikit. Berdasarkan penilaian dari kelima model tersebut, didapatkan hasil bahwa model DIA65 merupakan model yang paling baik dilihat dari simpangan dan berat strukturnya.
PENGUJIAN KEKUATAN PENGHUBUNG GESER YANG TERBUAT DARI BAJA TULANGAN BERBENTUK “U TERBALIK” Ida Ayu Made Budiwati
Jurnal Ilmiah Teknik Sipil Vol. 16, No. 2 Juli 2012
Publisher : Department of Civil Engineering, Udayana University

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Abstract

Abstrak: Penelitian ini menganalisis kekuatan penghubung geser “U terbalik” berdasarkan hubungan slip dan beban dengan mutu beton berbeda dan luas penampang serta sudut kemiringan yang digunakan sama. Penghubung geser merupakan potongan baja tulangan polos diameter Ø 10 mm panjang 400 mm berbentuk huruf “U terbalik” yang dimiringkan sebesar 450 terhadap sayap balok baja profil IWF (250x125x6x9) mm. Pengujian dilakukan terhadap 6 spesimen komposit dengan mutu beton yang berbeda yakni sebesar 21.79 MPa (benda uji C 20) dan 30,84 Mpa (benda uji C 25) masing-masing terdiri atas 3 spesimen mutu beton. Pengujian kekuatan penghubung geser dengan metode Push Out Test berdasarkan standar Australia (AS 2327 Part 1, 1980). Hasil tes menunjukkan bahwa meningkatnya mutu beton menyebabkan menurunnya nilai slip yang berarti peningkatan kapasitas beban yang dapat ditahan oleh benda uji. Pada saat diberikan beban sebesar 72,5 kN terhadap masing-masing penghubung geser pada benda uji, slip yang dihasilkan oleh C 20 dan C25 berturut-turut sebesar 2,433 mm dan 1,060 mm. Pada kenaikan mutu beton sebesar 41,53%, maka penurunan slip C 25 terhadap C 20 adalah sebesar 56,43%. Pada spesimen C 20 dan C 25 beban ultimit belum dicapai dengan beban 72,5 kN sehingga beban yang masih mampu diterima dalam kondisi elastis hingga sebesar 72,5 kN untuk setiap penghubung geser.
EXPERIMENTAL COMPRESSIVE STRENGTH AND MODULUS OF ELASTICITY OF MASONRY Ida Ayu Made Budiwati
Jurnal Ilmiah Teknik Sipil Vol. 13, No. 1 Januari 2009
Publisher : Department of Civil Engineering, Udayana University

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Abstract

Compressive strength and Modulus of elasticity of masonry are significantparameters when considering structural masonry design. This paper presents thosemasonry properties which were determined experimentally. Three types specimensmade of clay brick masonry and concrete block masonry were built. They were testedin compression until failure and conducted in accordance with the BS EN 1052-1:1999. Properties of structural units and the mortar were also determined. Resultsshow that the mean compressive strength of the mortar, clay brick units and concreteblock units are 4.2 N/mm2, 63.0 N/mm2 and 12.8 N/mm2 respectively. Thecharacteristic compressive strength of masonry made of clay brick is 11.2 N/mm2 andthat made of concrete block is 7.2 N/mm2. The failure of the masonry tested incompression was due to development of tensile cracks parallel to the axis of theloading. Modulus of elasticity of masonry was close to 1000 fk which is a formulagiven in Eurocode 6.
ANALISIS PERILAKU THREE-SIDED ARCH SEBAGAI ALTERNATIF DARI BOX CULVERT Ida Bagus Prastha Bhisama; Made Sukrawa; Ida Ayu Made Budiwati
JURNAL SPEKTRAN Vol 9 No 1 (2021)
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRAN.2021.v09.i01.p02

Abstract

Penelitian ini dilakukan untuk mengetahui perilaku dari struktur three-sided arch (TSA) yang merupakan salah satu alternatif dari struktur box culvert (BC). Perilaku kedua struktur dibandingkan melalui pemodelan elemen hingga pada program SAP2000. Pemodelan model validasi merupakan tahap awal dalam penelitian ini, yang dibuat berdasarkan pada hasil uji laboratorium oleh peneliti lain. Hasil pemodelan validasi menunjukkan bahwa pemodelan dengan elemen frame (MFR) dan shell (MSH) lebih mendekati hasil uji laboratorium, sedangkan elemen solid (MSO) jauh berbeda sehingga tidak digunakan dalam model aplikasi. Setelah metode pemodelan valid, selanjutnya dilakukan pemodelan aplikasi BC dan TSA yang memiliki panjang bentang bervariasi. Model aplikasi yang dibuat meliputi BC dan TSA dengan bentang 4 m (BC4 dan TSA4), 5 m (BC5 dan TSA5), 7 m (BC7 dan TSA7), 9 m (BC9 dan TSA9) dan 11 m (BC11 dan TSA11) dengan tebal pelat atas 400 mm pada model BC dan 300 mm pada TSA. Deformasi kedua model dianalisis secara non-linier menggunakan pembebanan bertahap, variasi modulus elastisitas (E) dan momen inersia penampang retak (Icr). Untuk mengetahui gaya-gaya dalam lainnya, kedua model dianalisis secara linier dengan beban lalu lintas sesuai SNI 1725:2016. Berdasarkan hasil analisis, perilaku TSA lebih baik dibandingkan BC, dilihat dari deformasi TSA yang mampu menyerupai atau bahkan lebih kecil dari BC meskipun dengan ketebalan pelat atas yang 25% lebih kecil. Pada model dengan variasi bentang, struktur mampu menahan kombinasi pembebanan lajur ‘D’ sampai dengan bentang 7 m. Untuk model bentang 9 dan 11 m, yaitu BC9, TSA9, BC11 dan TSA11 diperlukan penebalan pada pelat atas struktur.
STUDI ANALISIS PENGARUH PROPERTI BETON DAN DINDING PASANGAN TERHADAP PERILAKU RDP BERLUBANG Ida Ayu Made Budiwati; I Ketut Sudarsana; Made Sukrawa; Nanda Dwi Wulan Sari
JURNAL SPEKTRAN Vol 6 No 2 (2018): Vol. 6, No. 2, Juli 2018
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

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Abstract

ABSTRAK Perilaku rangka beton bertulang dengan dinding pengisi berlubang sentris (RDP) dipengaruhi oleh karakteristik material dan geometrinya. Analisis sensitivitas dilakukan pada model RDP menggunakan analisis numerik akibat variasi modulus elastisitas dinding (Em), modulus elastisitas beton (Ec), dan lebar strat diagonal (wds) pada struktur RDP. Balok dan kolom dimodel sebagai elemen frame dan dinding pengisi berlubang dimodel sebagai strat diagonal. Hasil analisis sensitivitas model RDP kemudian dibandingkan dengan hasil eksperimen peneliti lain dan diaplikasikan pada gedung perkantoran 3 lantai. Hasil analisis sensitivitas menunjukkan bahwa nilai modulus elastisitas dinding (Em), modulus elastisitas beton (Ec), dan Inersia balok (Ib) dan inersia kolom (Ik) perlu direduksi setelah 95% beban lateral dikerjakan pada struktur. Nilai reduksi pada beban 95% adalah sebesar 0,6 dan 0,8 masing-masing untuk modulus elastisitas dan inersia. Pada beban 100%, nilai modulus dan inersia dinding pengisi masing-masing direduksi sebesar 0,5 dan 0,7. Lebar strat diagonal (wds) yang digunakan dalam analisis yaitu Persamaan 1. Hasil analisis pada gedung menunjukkan bahwa peningkatan beban dari 95% ke 100% dan reduksi modulus elastisitas serta inersia, mengakibatkan peningkatan simpangan struktur, terjadi penurunan momen lapangan pada balok sebesar 4,74%-11,22%, dan penurunan momen tumpuan pada balok sebesar 12,84%-14,15%. Pada kolom, terjadi penurunan momen sebesar 1,24%-17,94%. Penurunan gaya geser pada balok terjadi sebesar 0,97%-1,63%, sedangkan pada kolom sebesar 1,67%-4,84%, namun terjadi peningkatan gaya aksial pada kolom sebesar 4,03%-5,36%.
RESPON SEISMIK STRUKTUR RANGKA DINDING PENGISI YANG DIMODEL DENGAN ELEMEN SHELL PENUH DAN PARSIAL Putu Ratna Suryantini; M. Sukrawa; I. A. M Budiwati
JURNAL SPEKTRAN Vol 5 No 1 (2017): Vol. 5, No. 1, Januari 2017
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (431.096 KB) | DOI: 10.24843/SPEKTRAN.2017.v05.i01.p10

Abstract

Abstract: Research on the seismic response of in-filled frame structure has been done with in-filled frame model as full and partial shell elements. The wall is considered active until the maximum load on the full shell models, while the partial shell model using the gradual load with the strength of the wall is considered inactive if the stress of the wall exceeded the wall strength The 4 storey hotel building with full wall in x-direction and wall with opening in y-direction were modeled in SAP 2000 as 3D infilled-frame using full and partial shell element. In Mxy models, both wall were included in the model, while in My models, only the wall in y-direction included. Therefore, 4 models were obtained, there are full shell model MxyShPn and MyShPn and partial shell model MyShPar and MyShPar. In addition, 2 diagonal strut models MxyS and MyS  and an open frame model MOF were made as comparison. Prior to model 3D structure, validation models were created using test result condited by other as reference. For that purphose 5 2D models were created there are open frame model MOF, single strut model MST, multiple strut model MSG, full shell model MShPn and  partial shell model MShPar. From validation models, it is apparent that the MxyShPar model mimic the behavior of tested structure better than the other models. From the 3D models analysis result show that the displacement in x-direction of MxyShPn, MxyShPar, MxyS were 89%, 85%, 84% smaller than those of MOF, respectively inclusion of wall in the models, also reduce the internal forces and reduse the natural period of the sctructure.
STUDI KARAKTERISTIK BATA MERAH LOKAL BALI SEBAGAI DINDING Ni Nyoman Rita Rahayu; I. A. M Budiwati; M. Sukrawa
JURNAL SPEKTRAN Vol 4 No 1 (2016): Vol. 4, No. 1, Januari 2016
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (349.437 KB) | DOI: 10.24843/SPEKTRAN.2016.v04.i01.p02

Abstract

Abstract : This study was conducted to determine the characteristics of brick red walls. Red brick taken from a local brick manufacturer Gianyar, Tabanan and  Negara refer to SNI 15-0686-1989. By using mortar 1: 4, 1: 5, 1: 6, 1: 7 and 1: 8, according to the rules SK SNI M-111-1990-03. Testing red brick wall refers to the standards set in SNI 03-4164-1996. The data measured in this study is the compressive strength, modulus of elasticity and flexural strength. Modulus of elasticity of the wall pair by way of experiment calculated using the equation defined BSEN 1052-1-1999 Brick walls Gianyar, Tabanan of mortar 1: 4 consecutive compressive strength characteristics are 1.22, 1.32 and 1.42 N / mm ². Based on the results obtained in the testing of masonry walls with mortar 1: 4 with the value of the average compressive strength of 11.13 N / mm ² are classified as class mortar (i) according to standard BS 5628-1-1992 characteristic compressive strength for all wall below the chart value pairs are characteristic compressive strength of masonry that is equal to 2.5 N / mm ². Average modulus of elasticity of masonry walls Gianyar of mortar 1: 4, 1: 5, 1: 6, 1: 7 and 1: 8, according to the equation obtained 1052-1-1999 BSEN 240, 191, 171, 156 and 154 N / mm ², masonry walls Tabanan of mortar 1: 7 and 1: 8 obtained elastic modulus of 356 and 344 N / mm ², masonry walls Negara of mortar 1: 7 and 1: 8 obtained elastic modulus of 363 and 348 N / mm ².  When compared three types of masonry is based on the elastic modulus and compressive strength, then the resulting brick wall of Negara has the greatest value for the various types of mortar, followed by a later brick wall brick wall Tabanan, Gianyar. Flexural strength values ??by using the equations listed in SNI 03-4165-1996,  for gianyar masonry walls with mortar 1: 4, 1: 5, 1: 6, respectively are 0.005, 0.004 , 0.004 N/mm2, brick Tabanan 0.009, 0.007, 0.005 0.009 N/mm2 and brick Negara, 0.008, 0.006 N/mm2. Testing by means of BS EN 1052-2-1999 be reviewed only for 1:4 mortar masonry walls flexural strength values ??produced an average of 0.0045 MPa, this value is very close to the value obtained from way SNI 03-4165-1996 is equal to 0.005 MPa.
PENGARUH RISIKO PADA PROYEK PERLUASAN DAN RENOVASI HOTEL DI BALI TERHADAP BIAYA, MUTU, DAN WAKTU PELAKSANAAN PROYEK IG.N Indra Cahya Hardiana; G.A.P Candra Dharmayanti; Ida Ayu Made Budiwati
JURNAL SPEKTRAN Vol 6 No 1 (2018): Vol. 6, No. 1, Januari 2018
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

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Abstract

The project construction at the hotel wherein the existing hotel is still operating have higher risk than a new projects which starting from begining because the owner want the existing hotel still operate as usual during the construction project activity. This study aimed: to analyze the major risks that may occur in hotel renovation and extention project; and to analize their impact on the cost, time, and quality. Data collected by interviews and survey using questionnaires. Respondents were selected based on purposive sampling includes 71 respondents (contractors, consultants, owners and hotel operators) on this project. The data were analyzed by descriptive qualitative risk analysis. The number of the risks identification were 54 risks. 28 risks are categorized as major risk which sourced from criminality, permit, contract, pollution, natural conditions, price change, financial problems, project access, planning and design, project supervision and implementation, procurement, human resources, and social. That major risk such as pollution, limited access and land of projects, existing installation, the availability of existing material, contractor experience, partition blocks, and the time adjusment of project activities with hotel operational time. From that 28 major risks, 15 risks affect to the cost, 25 risks affect to the time, and only 3 risk affect to the quality. This study will be continued to formulate the actions to mitigate the major risks. Keywords: Cost, Hotel Renovation Project, Quality, Risk Management, Risk Mitigation, Time
PEMODELAN STRUKTUR RANGKA DINDING PENGISI BERATURAN UNTUK GEDUNG 4, 7 DAN 10 LANTAI DENGAN VARIASI PENEMPATAN DINDING PENGISI PADA LANTAI DASAR P. A. Parmaheni Tirta Sari; M. Sukrawa; I. A. M. Budiwati
JURNAL SPEKTRAN vol 2, No 1, Januari 2014
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1155.277 KB) | DOI: 10.24843/SPEKTRAN.2014.v02.i01.p02

Abstract

Research on reinforced concrete structure with and without infill wall has been done by modeling the same structure as open frame (OF) and infilled frame (RDP) to compare in their stiffness, force distribution and dimensional changes. In RDP model, the wall is modeled as equivalent diagonal struts with one, two and three struts. Seven-storey building structure is taken as a reference and structures of 4 and 10 floors are used as comparison. To observe the effect of wall discontinuity at ground level additional 4 models were made for the 7 storey building by removing one, four, six, and all nine walls at ground level (RDP7S3SS1, RDP7S3SS2, RDP7S3SS3, and RDP7S3SS4). For seven-storey model, RDP structures with one, two, and three struts have a comparable lateral stiffness but it tends to increase for model with many struts. Compared to OF, RDP structure with one, two, and three struts have smaller lateral deformation with ratio 0,655; 0,636, and 0,612, respectively. Bending moment, shear and axial in the frame of RDP are also smaller than those of OF with ratio 0,223 and 0,916. RDP model with 3 struts gives better force distribution on the frame compared to the model with single strut. Removing all walls at ground level produce inter storey drift ratio of 4, which is a soft storey phenomenon. On the 4, 7, and 10 storey variation the lateral deformation ratio for RDP and OF are 0,547; 0,612, and 0,581, respectively. The cross sectional area of frame for RDP is as low as 40% compared to that of OF.
EFEK KOMBINASI BEBAN AKSIAL DAN LENTUR SERTA VARIASI BENTUK DAN UKURAN LUBANG TERHADAP KONSENTRASI TEGANGAN PADA BALOK BAJA BERLUBANG M. Sukrawa; A. A. N. A. Angga Pradhana; G. Pringgana; K. Sudarsana; I G. A. Susila; I A. M. Budiwati
JURNAL SPEKTRAN Vol 7 No 2 (2019): Vol. 7 No. 2, JULI 2019
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (457.382 KB)

Abstract

EFFECT OF COMBINED AXIAL AND BENDING LOADS AND VARYING SHAPES AND SIZES OF OPENING ON STRESS CONCENTRATION IN STEEL BEAM WITH WEB OPENINGABSTRACTResearch related to stress concentrations in perforated steel beams is usually carried out on simple beams without the influence of axial loads. In this study, modeling of 2-story steel frame structures was carried out to evaluate the effect of the combination of axial and flexural loads on the stress concentration around the opening in the steel beam. The observed opening includes square and circular opening, with and without reinforcement around the opening, with opening dimensions of 0.3 H, 0.5 H, and 0.7 H. H is the height of the beam. The types of reinforcement are All Around (AA), Long Horizontal (LH), and Doubler Plate (DP). The analysis results showed that 17% increase in beam axial force due to earthquake load, resulting in stress increase of 9% in square opening. The maximum stress around circular opening is smaller than that on the square one. The maximum stresses in the circular openings are 0.35 fy, 0.43 fy, and 0.69 fy for opening dimensions of 0.3 H, 0.5 H and 0.7 H, respectively. In the square opening, the maximum stress in 0.3 H opening is 0.57 fy, while for opening dimension of 0.5 H and 0.7 H the stresses exceeds the yield stress of the steel. Addition of AA and LH reinforcement in 0.5 H square opening, results in stresses lower than fy, whereas for the 0.7 H opening the reinforcement around the hole is ineffective.
Co-Authors A. A. Diah Parami Dewi A. A. N. A. Angga Pradhana Anak Agung Gede Sutapa Andriana Evendy AR D.M Priyantha Wedagama Dharmayanti, Gusti Ayu Putu Candra Gede Pringgana I Dewa Agung Sudarmanta I G. A. Susila I Gede Yoga Pratama I Kade Era Kurniawan I Ketut Sudarsana I Ketut Sudarsana I Ketut Sudarsana I P. Alit Suthanaya I Putu Agus Putra Wirawan I Wayan Sudarsana I Wayan Sudithayasa I. B. Dharma Giri Ida Bagus Dharma Giri Ida Bagus Prastha Bhisama IG.N Indra Cahya Hardiana Made Sukrawa Maya Saridewi Pascanawaty Nanda Dwi Wulan Sari Ngakan Made Anom Wiryasa Ni Nyoman Rita Rahayu P. A. Parmaheni Tirta Sari Putu Agus Nusada Putra Putu Didik Sulistiana Putu Dyah Jasmine Pradnyantari Putu Ratna Suryantini Putu Ryan Priyatna Restu Wiro Rudiatmoko Yohanes Angga Wijaya