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Analisis Ketidakberaturan Struktur Horizontal dan Vertikal Tower Mesjid Rahmah Kota Langsa Menggunakan SNI 1726:2019 Muhammad Riswandy; Haikal Fajri; Muhammad Zacky Ardhyan; Awalu Rahman
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 3 (2025): Juni 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i3.5417

Abstract

This study aims to analyze the response of a high-rise building to horizontal and vertical structural irregularities in a multi-story structure. The subject of the study is the Rahmah Mosque Tower, located at Jl. Lilawangsa, Gampong Paya Bujuk Tunong, Langsa Baro District, Langsa City, Aceh. This tower exhibits both horizontal and vertical irregularities, which can influence its behavior under applied lateral and vertical loadsThe structural behavior is evaluated by examining the building’s response to horizontal and vertical irregularities effect induced by seismic loading. The method for seismic loads are analyzed using dynamic response spectrum analysis in accordance with SNI 1726:2019, implemented in ETABS v18.1.1. Results indicate that failure in the Rahmah Mosque Tower is governed by beam collapse due to insufficient flexural capacity under seismic forces, whereas the columns are adequate to resist earthquake loads. Horizontally, the tower exhibits Type 1b and Type 1a irregularities, as well as Horizontal-Torsional Irregularity. Type 1a. Vertically, it displays Mass (weight) Irregularity and Vertical Geometric Irregularity. These irregularities could significantly affect a building's safety, stability, and structural efficiency. Designs that fail to calculate these irregularities may pose serious risks of damage, both under static and dynamic conditions.
Perbandingan Arah Serat Material Komposit Natural Fiber Reinforced Polymer (NFRP) Serat Nenas Untuk Perkuatan Struktur Beton Salsabila, Shafira; Muhammad Riswandy; Febrina Dian Kurniasari; Tjut Rizqi Maysyarah Hadi
Jurnal Perencanaan dan Penelitian Teknik Sipil Vol 4 No 2 (2025): Juli
Publisher : Universitas Iskandar Muda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55616/prince.v4i2.956

Abstract

Concrete structures that experience performance degradation require repair and strengthening to maintain their load-bearing capacity. One method that has gained attention is the use of composite materials, specifically Natural Fiber Reinforced Polymer (NFRP), which consists of adhesives reinforced with natural fibers. Pineapple fiber is a promising natural fiber for NFRP due to its abundance, low production cost, environmental friendliness, and high tensile strength. This study aims to investigate the adhesion behavior between NFRP composite materials and concrete, as well as to observe the failure modes of both concrete and NFRP under tensile loading. Concrete specimens measuring (100 x 100 x 300) mm were reinforced with pineapple fiber NFRP of (50 x 240) mm, with fiber orientations arranged in both unidirectional and random patterns. The results showed that the maximum tensile strength of the random pineapple fiber NFRP reached 31.59 MPa. The highest load capacity recorded was 4360 kg, observed in the LP3-SNS-C test specimen. The failure mode occurred as a fracture of the pineapple fiber NFRP in the center of the specimen’s cross-section on both sides.
Analisis Desain Gedung Imigrasi Kelas I Banda Aceh dari Struktur Baja ke Struktur Beton Bertulang Alfisyahrin, Alfisyahrin; Muhammad Riswandy; Michel Kasaf; Tjut Rizqi Maysyarah Hadi; Mhd. Arief Diana
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 4 (2025): Agustus 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i3.5370

Abstract

This study provides an understanding of the advantages of reinforced concrete in the construction of multi-story buildings in Banda Aceh. The objective of this research is to improve the efficiency of constructing the Class I Immigration Office Building in Banda Aceh by replacing the main structural system from steel to reinforced concrete. This change was carried out in accordance with the SNI 2847:2019 standard, utilizing the ETABS application for the design and analysis process.The results show that the total building weight in the existing condition (steel structure) is 1,594,043.95 kg, while using reinforced concrete increases the weight to 2,631,222.38 kg. At portal 5-5, the differences in bending moment and shear force between the steel and reinforced concrete structures are significant, with values of -2.9559 kNm and -80.0447 kNm for bending moment, and 3.5657 kN and 29.1996 kN for shear force, respectively. Additionally, the maximum lateral displacement in both X and Y directions is lower in the reinforced concrete structure compared to the steel structure. The axial force at portal 5-5 also shows an increase from -492.0887 kN (steel structure) to -949.2849 kN (reinforced concrete structure). These findings indicate that the use of reinforced concrete provides better stability, capacity, and overall structural performance compared to the steel structure