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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Sinergi Semesta Teknika Jurnal Rekayasa Sipil
Cahyati, Martyana Dwi
Universitas Muhammadiyah Yogyakarta
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Transportation

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Pengaruh Variasi Tebal Terhadap Kekuatan Lentur Pada Balok Komposit Menggunakan Response 2000 Cahyati, Martyana Dwi
Semesta Teknika Vol 19, No 2 (2016): NOVEMBER 2016
Publisher : Semesta Teknika

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The tensile strength is one of disadvantage for the concrete beam. Therefore, the development of an innovation in the structural elements of the beam by using the composite material of steel and concrete is necessary. The composite system is capable of resisting expected tensile so the load capacity and moment on the beam can be increased. This study examined the effect of variations in the thickness of the cross section of the IWFs profile on flexurral moment of the composite beam. The composite beam using IWF 150x75x5x7 with variations of thickness web are 8 mm, 10 mm and 12 mm and using simply supported. The analysis using Response 2000. The results obtained for the flexural moment capacity from the variations of thickness web 8 mm thick, 10 mm and 12 mm are given respectively 236.40 kN, kN 244.63 and 252.83 kN. The results have shown that the increasing of thickness variation on the profile web IWF will increase the capacity of the composite beam bending moment. In addition, the increasing of thickness web is also affected to the increasing of stiffness on beam.
Analisis Tegangan Regangan dan Defleksi pada Sambungan Balok-Kolom Beton Bertulang Menggunakan Beban Statik Prayuda, Hakas; Cahyati, Martyana Dwi; Soebandono, Bagus
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 24, Nomor 2, DESEMBER 2018
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1953.548 KB) | DOI: 10.14710/mkts.v24i2.18346

Abstract

Reinforced concrete is commonly used in any infrastructures. In building, it can be applied for beam and column separately, but the joints between those elements in this type of structure might be vulnerable due to the strength compared to the element itselft. In this study, some parameters namely ductility, stiffness, and energy dissipation of beam-column connection in precast concrete will be examined using finite element method. Six samples in this experiment are made considering some variations such as connection type in interior and exterios condition, round-shaped and rectanguler-shaped of column, and T-shaped and rectanguler-shaped of beam. Static loads were given in the middle of the beam and column so that the crack pattern can be obtained. From this experiment, it will be known the best and suitable joints by observing those three parmeters.
FRESH AND MECHANICAL CHARACTERISTICS OF SELF-COMPACTING POLYPROPYLENE FIBER CONCRETE INCORPORATED WITH KAOLIN Saleh, Fadillawaty; Cahyati, Martyana Dwi; Prayuda, Hakas; Zega, Berkat Cipta; Monika, Fanny
SINERGI Vol 24, No 3 (2020)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2020.3.007

Abstract

Self Compacting Concrete (SCC) is concrete with high fluidity so that it can flow and fill the spaces in the mold without the compaction process. This study discusses the effect of the adding of kaolin and polypropylene fibers in order to increase the flowability, compressive strength, flexural strength, and tensile strength in self-compacting concrete. The additional material of kaolin was 5%, 10%, and 15% of the cement weight. The polypropylene fibers were 1%, 1.5%, and 2%. The flowability test, which was used, was Table flow, V-Funnel, and L-Box. Compressive strength testing was conducted when the concrete was 7, 14, and 28 days old. The flexural test was performed with a measurement of 150 x 150 x 600 mm as many as 18 specimens tested at the age of 28 days. The results showed that the addition of kaolin and polypropylene fibers met the flowability specifications of self-compacting concrete. The addition of polypropylene can increase the flexural strength and tensile strength of the concrete beam, but cannot increase the compressive strength of self-compacting concrete.
Pengaruh Variasi Tebal Terhadap Kekuatan Lentur Pada Balok Komposit Menggunakan Response 2000 Cahyati, Martyana Dwi
Semesta Teknika Vol 19, No 2 (2016): NOVEMBER 2016
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v19i2.2371

Abstract

The tensile strength is one of disadvantage for the concrete beam. Therefore, the development of an innovation in the structural elements of the beam by using the composite material of steel and concrete is necessary. The composite system is capable of resisting expected tensile so the load capacity and moment on the beam can be increased. This study examined the effect of variations in the thickness of the cross section of the IWF's profile on flexurral moment of the composite beam. The composite beam using IWF 150x75x5x7 with variations of thickness web are 8 mm, 10 mm and 12 mm and using simply supported. The analysis using Response 2000. The results obtained for the flexural moment capacity from the variations of thickness web 8 mm thick, 10 mm and 12 mm are given respectively 236.40 kN, kN 244.63 and 252.83 kN. The results have shown that the increasing of thickness variation on the profile web IWF will increase the capacity of the composite beam bending moment. In addition, the increasing of thickness web is also affected to the increasing of stiffness on beam.
Kuat Geser Dan Daktilitas Pada Balok Castellated Modifikasi Komposit Mortar Akibat Beban Siklik Martyana Dwi Cahyati; Iman Satyarno
Rekayasa Sipil Vol 5, No 2 (2016)
Publisher : Universitas Mercu Buana

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Abstract

Struktur baja castellated merupakan struktur yang terbuat dari balok IWF yang memiliki bukaan lubang berupa heksagonal, lingkaran, maupun persegi. Dengan adanya bukaan lubang maka akan menambah ketnggian penampang yang mampu meningkatkan momen inersia yang terjadi pada balok, sehingga beban maksimum yang dapat dipikul balok juga akan meningkat, namun balok tersebut juga memiliki kelemahan yaitu terjadinya mekanime vierendeel. Oleh karena itu, Pada penelitian ini dikaji perilaku balok castellated komposit mortar akibat beban siklik yang memodelkan beban gempa di lapangan. Tujuan dari penelitian ini adalah untuk mendapatkan kekuatan ultimte, daktilitas, dan pola keruntuhan pada balok castellated komposit mortar. Benda uji terbuat dari profil 2L.30.3.3, tulangan ø 13 mm, dan mortar yang memiliki nilai fas 0,4 dengan perbandingan1:1,5. Beban siklik yang diaplikasikan mengacu pada ACI T1.1-01. Berdasarkan hasil penelitian didapatkan nilai kapasitas beban ultimate pada balok sebesar 203,5 kN untuk siklus positif dan 201,5 untuk siklus negatif. Lendutan yang terjadi sebesar 3,46 mm untuk siklus positif dan 3,36 untuk siklus negatif. Nilai daktilitas rata-rata yang didapat sebesar 3,45. Dari hasil tersebut dapat diklasifikasikan bahwa struktur memiliki tingkat daktilitas sedang.
FRESH AND MECHANICAL CHARACTERISTICS OF SELF-COMPACTING POLYPROPYLENE FIBER CONCRETE INCORPORATED WITH KAOLIN Hakas Prayuda; Berkat Cipta Zega; Fanny Monika; Fadillawaty Saleh; Martyana Dwi Cahyati
SINERGI Vol 24, No 3 (2020)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2020.3.007

Abstract

Self Compacting Concrete (SCC) is concrete with high fluidity so that it can flow and fill the spaces in the mold without the compaction process. This study discusses the effect of the adding of kaolin and polypropylene fibers in order to increase the flowability, compressive strength, flexural strength, and tensile strength in self-compacting concrete. The additional material of kaolin was 5%, 10%, and 15% of the cement weight. The polypropylene fibers were 1%, 1.5%, and 2%. The flowability test, which was used, was Table flow, V-Funnel, and L-Box. Compressive strength testing was conducted when the concrete was 7, 14, and 28 days old. The flexural test was performed with a measurement of 150 x 150 x 600 mm as many as 18 specimens tested at the age of 28 days. The results showed that the addition of kaolin and polypropylene fibers met the flowability specifications of self-compacting concrete. The addition of polypropylene can increase the flexural strength and tensile strength of the concrete beam, but cannot increase the compressive strength of self-compacting concrete.
Co-Authors Berkat Cipta Zega Fadillawaty Saleh Fadillawaty Saleh, Fadillawaty Hakas Prayuda Iman Satyarno Monika, Fanny Soebandono, Bagus