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Herdiansah, Yudi
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Studi Komparasi Analisis Inelastis Dinamik Riwayat Waktu dan Statik Pushover Terhadap Kinerja Struktur Herdiansah, Yudi; Yuana, Prima Sukma
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 11 No 2 (2012): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jt.vol11no2.185

Abstract

Indonesia merupakan negara yang mempunyai potensi gempa aktif karena sebagian besar wilayahnya merupakan letak pertemuan lempeng tektonik. Oleh karena itu, perencanaan bangunan di Indonesia harus dibuat sedemikian rupa sehingga struktur tahan terhadap gempa. Tren terbaru perencanaan bangunan tahan gempa adalah perencanaan berbasis kinerja. Analisis yang digunakan adalah analisis dinamik riwayat waktu yang kemudian dibandingkan dengan analisis statik pushover. Analisis dinamik riwayat waktu menggunakan empat percepatan gempa yaitu Gempa El-Centro, Northridge, Kobe, dan Chi-chi yang kemudian respon spektrumnya disesuaikan dengan respon spektrum SNI 03-1726-2003. Parameter yang dihasilkan dari analisis ini adalah perpindahan maksimum. Hasil analisis menunjukkan besarnya perpindahan maksimum yang dihasilkan oleh analisis time history secara umum tidak melebihi target perpindahan dari analisis pushover, hanya ada penyimpangan pada struktur SRPMM dengan percepatan Gempa Northridge dimana perpindahan yang dihasilkan melebihi target perpindahan maksimum dari analisis pushover. Level kinerja struktur yang dihasilkan keduanya berada diantara IO-LS. Sesuai dengan level kineri» vang dihasilkan, analisis statik pushover cukup rasional dan dapat diandalka” tuk evaluasi perilaku seismik dan dapat menggantikan analisis dinamik nonlinier riwayat waktu dalam perencanaan berbasis kinerja.
Evaluasi Kuat Tekan Beton Terpasang pada Struktur Dermaga Eksisting Berdasarkan Pengujian Destructive dan Non-Destructive Herdiansah, Yudi; Cendana, Widhi Prima
Jurnal Teknik Sipil Vol 21 No 1 (2025): Jurnal Teknik Sipil
Publisher : Universitas Kristen Maranatha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28932/jts.v21i1.8698

Abstract

The dock is a critical component of a port, serving both as a mooring facility and a berthing area for ships. Given the importance of the quay, it is essential to ensure that each quay is equipped with suitable and functional facilities, both in terms of operational use and structural integrity. One method of evaluating existing quays is through structural testing. The objective of this structural testing is to obtain material parameters that will serve as inputs for modeling the existing structure. The material testing parameters to be determined include equivalent concrete compressive strength values, which will be used as references in the structural modeling of the quay. The structural testing comprises both destructive (DT) and non-destructive tests (NDT). To achieve results that accurately represent the overall condition of the existing structure, each test must be correlated with others. The correlations analyzed include those between core drill tests and hammer tests, as well as between core drill tests and ultrasonic pulse velocity (UPV) tests. The correlation results chosen for use in the structural modeling are those between core drill tests and UPV tests. The equivalent compressive strength values obtained from this analysis are 21.41 MPa for Segment 1, 24.1 MPa for Segment 2, and 23.18 MPa for Segment 3. The analysis reveals differences in the equivalent compressive strength values for each segment, likely due to variations in the construction years of the quay segments, which correspond with the observed differences in equivalent concrete compressive strength.
Upaya Peningkatan Durabilitas Beton Terpapar Klorida dan Sulfat dengan Menggunakan Silica Fume, Semen Tipe II, dan Protective Coating Sulaeman, Agus; Herdiansah, Yudi; Destianto, Anto
Jurnal Teknik Sipil Vol 20 No 2 (2024): Jurnal Teknik Sipil
Publisher : Universitas Kristen Maranatha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28932/jts.v20i2.6418

Abstract

The durability of concrete material is affected by the environment. Extreme environments that affect the concrete are environments with high chloride and sulfate levels. The most commonly used concrete protection methods are silica fume, type II cement and protective coatings. The tests are carried out included: testing for chloride content, testing on chloride infiltration, visual analysis and testing for changes of length. The specimens was made in 4 variations namely; specimens with type I cement without protection, specimens with type I cement with a protective coating, specimens with type I cement  with the addition of silica fume, specimens with type II cement without protection. The specimens were immersed in a solution of chloride and sulfate for 14 days, 28 days, 42 days and 56 days. The results showed that silica fume in type I cement could increase the durability of concrete against chloride but not against sulfates, protective coating could increase the durability of concrete against chloride and sulfates, type II cement could increase the durability of concrete against sulfates but not against metals.
Perbandingan Efektifitas Protective Coating, Silica Fume dan Semen Tipe II Terhadap Pengaruh Klorida dan Sulfat pada Beton Herdiansah, Yudi; Destianto, Anto; Sulaeman, Agus
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 22 No 2 (2023): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol22no2.508

Abstract

Concrete that is in a surrounding with high sulfate and chloride levels can affect durability of concrete. Numerous technologies that might be often used include: protecting coating, addition of silica fume to concrete mix, and type II cement. Consequently, the intention of this have a look at was to examine effectiveness of shielding coatings, the addition of silica fume to the concrete blend, and the usage of kind II cement to grow the sturdiness of concrete uncovered to chlorides and sulfates. The specimens were made in 4 variations; cement type I specimens without protection, cement type I specimens with coating, cement type I specimens with silica fume, and cement type II without protection. The specimens were immersed in a solution of chloride and sulfate for 14 days, 28 days, 42 days, and 56 days. The study was carried out by testing the compressive strength, chloride content, chloride infiltration, visual analysis, and change of length. The results showed that protective coating had resistance to chloride and sulfate, the addition of silica fume to cement type I provided resistance to chloride but did not to sulfate, while the use of cement type II provided resistance to sulfate but did not provide chloride.
Co-Authors Agus Sulaeman Cendana, Widhi Prima Destianto, Anto Yuana, Prima Sukma