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All Journal Journal of Civil Engineering Prosidia Widya Saintek Proceeding of The International Conferences on Engineering Sciences
Ika Salsabila Nurahida
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Agriculture, Biological Sciences & Forestry Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation

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FINITE ELEMENT ANALYSIS ON THE NONLINEAR BEHAVIOR OF THE RC SHEAR WALL WITH REGULAR OPENINGS INFLUENCED BY HIGH-STRENGTH STEEL Ika Salsabila Nurahida; Bambang Piscesa; Pujo Aji; Asdam Tambusay
Journal of Civil Engineering Vol 37, No 2 (2022)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v37i2.13447

Abstract

This paper presented a nonlinear finite element analysis of lateral loading RC shear walls with regular openings using the 3D-NLFEA program. The RC shear walls model was generated from the available test results in the literature. To model the concrete under a complex stress state, a multi-surface plasticity model which combines compression failure surface with tension cut-off failure surface was used. The model was intended to look at the load-displacement relationship and the crack pattern between the model and the numerical model. In addition to the numerical model verification, parametric studies were carried out to investigate the use of high-strength steel (HSS) of the two different grades (grades 100 and 120) to replace all the normal-strength steel (NSS) or only some of it. The parametric studies found that the shear wall with the NSS bar demonstrated higher stiffness and achieved higher lateral load with the lowest extent of damage (compared to the RC shear wall with the HSS bar). On the other hand, using the HSS bar resulted in lower stiffness, lower lateral load, and higher damage region, which was expected as more strain is required to yield the HSS bar.
EVALUASI STRUKTUR DERMAGA KAISON AKIBAT RENCANA PENGEMBANGAN PELABUHAN Nurahida, Ika Salsabila; Pranoto, Pranoto; Suraji, Aji
Prosidia Widya Saintek Vol. 3 No. 2 (2024)
Publisher : Universitas Widyagama Malang

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Abstract

Negara Indonesia sebagian besar berupa lautan, sehingga Indonesia memerlukan pelabuhan sebagai saran penunjang pertumbuhan ekonomi. Pelabuhan Tanjung Perak Surabaya merupakan pelabuhan dengan wilayah yang strategis dengan dikukung daerah hinterland Jawa Timur. Seiring meningkatnya pertumbuhan ekonomi maka PT Pelindo III melakukan penataan ruang bongkar muat dan klasterisasi pada beberapa dermaga. Salah satu dermaga yang mengalami klasterisasi adalah dermaga X dimana dulu dermaga X adalah dermaga yang menangani muatan general cargo menjadi dermaga multipurpose. Sehingga dermaga X akan mengalami pengembangan seperti yang direncanakan, yaitu peningkatan bobot kapal yang ditambat sesuai dengan stabilitas struktur kapal yang dapat ditambat agar struktur kaison tetap aman, yaitu kapal container 10.000 DWT. Namun, tetap perlu dilakukan perkuatan terhadap struktur kaison dikarenakan terjadi pengerukan. Struktur dermaga X menggunakan kaison, sehingga perlu dilakukan evaluasi terhadap stabilitas eksternal dan kapasitan elemen struktur dermaga itu sendiri. Berdasarkan hasil evaluasi, untuk stabilitas eksternal struktur dermaga masih memenuhi, namun untuk kapasitas elemen struktur dermaga kaison tidak memenuhi, sehingga diperlukan rencana perkuatan kedepannya. Rekomendasi perkuatan yang diusulkan adalah penambahan elemn struktur dinding pengaku di tengah bentang atau dermaga baru didepan struktur dermaga eksisting.
FINITE ELEMENT ANALYSIS ON THE NONLINEAR BEHAVIOR OF THE RC SHEAR WALL WITH REGULAR OPENINGS INFLUENCED BY HIGH-STRENGTH STEEL Ika Salsabila Nurahida; Bambang Piscesa; Pujo Aji; Asdam Tambusay
Journal of Civil Engineering Vol. 37 No. 2 (2022)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v37i2.7616

Abstract

This paper presented a nonlinear finite element analysis of lateral loading RC shear walls with regular openings using the 3D-NLFEA program. The RC shear walls model was generated from the available test results in the literature. To model the concrete under a complex stress state, a multi-surface plasticity model which combines compression failure surface with tension cut-off failure surface was used. The model was intended to look at the load-displacement relationship and the crack pattern between the model and the numerical model. In addition to the numerical model verification, parametric studies were carried out to investigate the use of high-strength steel (HSS) of the two different grades (grades 100 and 120) to replace all the normal-strength steel (NSS) or only some of it. The parametric studies found that the shear wall with the NSS bar demonstrated higher stiffness and achieved higher lateral load with the lowest extent of damage (compared to the RC shear wall with the HSS bar). On the other hand, using the HSS bar resulted in lower stiffness, lower lateral load, and higher damage region, which was expected as more strain is required to yield the HSS bar.
The Effect of Building Irregularities on the Structural Performance of Air Traffic Control Towers in High Seismic Zones Ika Salsabila Nurahida; Karina Meilawati Eka Putri; Kemal Aziz
Proceeding of the International Conferences on Engineering Sciences Vol. 3 No. 1 (2026): January : Proceeding of the International Conferences on Engineering Sciences
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/iconfes.v3i1.189

Abstract

This study examines the seismic performance of slender Air Traffic Control (ATC) towers in high‑hazard regions (PGA > 0.4g), where vertical taper, torsional eccentricity, and top‑heavy cab mass can significantly increase drift, base shear, and collapse risk relative to conventional buildings. Existing studies often rely on linear procedures and outdated provisions, leading to underestimation of nonlinear behaviour and limited guidance for ATC towers designed to SNI 1726:2019. The research aims to quantify these irregularity effects and formulate design recommendations that satisfy Immediate Occupancy, Life Safety, and Collapse Prevention performance targets. The methodology couples response spectrum analysis, using a site‑specific Padang spectrum consistent with SNI 1726:2019 and ASCE 7‑16, with nonlinear pushover analysis interpreted through FEMA/ATC performance‑based criteria. A parametric study is performed on three cab configurations small, medium, and large modelled as 5%, 15%, and 25% mass ratios at the tower head, while keeping a 10 m × 10 m hybrid core–frame shaft constant. Results indicate that larger cab mass produces systematic but moderate increases in global displacement, story drift, and base shear, while plastic hinges localize primarily in the upper stories and cab‑support region, yielding performance levels from Immediate Occupancy to Collapse Prevention. Overall, the tower meets code drift limits and acceptable performance if local strengthening is provided around the shaft–cab interface, offering a calibrated reference for top‑heavy ATC tower design in Indonesian high‑seismic settings and identifying priorities for future time‑history and soil–structure interaction studies.
Co-Authors Aji Suraji Asdam Tambusay Bambang Piscesa Karina Meilawati Eka Putri Kemal Aziz PRANOTO Pujo Aji