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Ika Salsabila Nurahida
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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.
PENGARUH KERUSAKAN JALAN YANG TIDAK DITANGANI TERHADAP PENURUNAN DAYA DUKUNG TANAH DASAR prabowo, prabowo.; Revantoro, Nemesius Bambang; Nurahida, Ika Salsabila; Arinya Nugroho, Zulfikar Putra; Sidharta, Rassya Athalla
Teras Jurnal : Jurnal Teknik Sipil Vol. 16 No. 1 (2026): Teras Jurnal
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v16i1.1308

Abstract

Abstrak   Prasarana transportasi jalan memiliki peran penting dalam mendukung mobilitas masyarakat dan distribusi barang, sehingga berkontribusi pada pertumbuhan ekonomi. Untuk menjaga fungsinya tetap optimal, perkerasan jalan perlu dirawat secara rutin dan tepat waktu. Namun, banyak ruas jalan di Indonesia mengalami kerusakan yang penanganannya terlambat, menyebabkan kondisi semakin parah dan aktivitas transportasi terganggu. Penelitian ini bertujuan mengetahui pengaruh keterlambatan perbaikan kerusakan permukaan jalan terhadap penurunan daya dukung tanah dasar. Penilaian kondisi jalan menggunakan metode RCI, sedangkan daya dukung tanah dasar dianalisis menggunakan nilai CBR berdasarkan pengujian DCP. Hasil menunjukkan bahwa semakin parah kerusakan jalan, semakin rendah nilai CBR; jalan kondisi baik memiliki CBR rata-rata 18,45, sedangkan kerusakan berat hanya 2,77. Varians antar pengujian rendah, menunjukkan konsistensi data. Hasil ANOVA menunjukkan F hitung 261,80 lebih besar dari F kritis 4,07 dengan P-value < 0,05, sehingga dapat disimpulkan bahwa kerusakan jalan berpengaruh signifikan terhadap penurunan daya dukung tanah dasar.   Kata kunci: Pengaruh, Kerusakan Jalan, RCI;Subgrade, CBR, DCP, Anova     Abstract   Road transportation infrastructure plays a critical role in supporting community mobility and the distribution of goods, thereby contributing to economic growth. To maintain optimal functionality, pavement structures require routine and timely maintenance. However, many road segments in Indonesia suffer from damage whose repairs are often delayed, leading to worsening conditions and disruptions to transportation activities. This study aims to determine the effect of delayed repair of pavement surface distress on the reduction of subgrade bearing capacity. Road condition assessment was conducted using the RCI method, while the subgrade bearing capacity was analyzed based on CBR values obtained from DCP testing. The results indicate that the more severe the road damage, the lower the CBR value; roads in good condition had an average CBR of 18.45, whereas severely damaged roads had only 2.77. The low variance among tests demonstrates data consistency. The ANOVA results show an F-value of 261.80, which is greater than the critical F-value of 4.07, with a P-value < 0.05. Therefore, it can be concluded that road surface damage has a significant effect on the reduction of subgrade bearing capacity.   Keywords: Influence, Road Damage, RCI; Subgrade, CBR, DCP, Anova.  
Co-Authors Aji Suraji Arinya Nugroho, Zulfikar Putra Asdam Tambusay Bambang Piscesa Bambang Revantoro, Nemesius prabowo, prabowo. Pranoto Pranoto Pujo Aji Sidharta, Rassya Athalla