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All Journal Jurnal IPTEK AGREGAT Civil Engineering Dimension Prosiding Seminar Nasional Sains dan Teknologi Terapan Borneo Engineering: Jurnal Teknik Sipil Rekayasa: Jurnal Teknik Sipil Jurnal Teknik Sipil Journal of Civil Engineering, Planning, and Design (JCEPD)
Jaka Propika
Mahasiswa S1 Lintas Jalur Jurusan Teknik Sipil FTSP-ITS
Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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Analisis Pushover terhadap Struktur Gedung dengan Sistem Rangka Pemikul Momen Khusus menggunakan Metode Precast septiarsilia, Yanisfa; Propika, Jaka; Susanti, Eka; Prasetyo, Agus Edy
AGREGAT Vol 9 No 1 (2024)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v9i1.22101

Abstract

The ITS Tower 2 building was built on Keputih Street, Surabaya. This building has 13 floors with a height of +51.00 meters which was built using a conventional concrete system. Based on the structural analysis results, the authors found that the existing structure was included in the category of soft soil (SE). In SNI 2847-2019 for the Special Structural Wall Systems category, the building height had a maximum limit of 48 meters. Conventional system planning took a relatively long time to complete. So it was necessary to evaluate the existing structure and modify it using the SMRF method and Precast System. The SMRF-method was used because it did not have a height limit in its planning, and the precast system was chosen because the planned structure had a typical floor plan. The evaluation of the existing structure showed that the fundamental period was 1.2384 seconds, the mass participation in the X direction was 93.90%, the Y direction was 91.79% with 75 modals, and the most significant floor deviation occurred in the Y direction was 49.57 mm. This value met the requirements according to SNI 2847-2019 and SNI 1726-2019; several beam and column cross-section elements are still unsafe due to the reinforcement being smaller than the analysis result, but the performance level was included in the Immediate Occupancy. The evaluation results of the structure showed that the main beam B2 was 60/80 with the longitudinal reinforcement 8D29, the joist beam B4 was 50/70 and B6 was 40/60 with the longitudinal reinforcement 7D25, the column K1 was 110/110 with the longitudinal reinforcement 28D36. The structural behavior obtained the entire period of 1.6059 seconds, the mass participation in the X direction was 99.30%, the Y direction was 99.24% with 50 modals, and the most significant floor deviation occurred in the Y direction was 28.46 mm. This value met the requirements and performance of the building, including the Immediate Occupancy level. Connections for precast columns used dry joints, while the connections for other precast elements used wet joints.
Perbandingan Kuat Tekan Beton dengan Subtitusi Fly Ash Ditinjau dari Air Laut dan Air Tawar pada Proses Curing Pertiwi, Dewi; Kusumaningrum, Dewi; Septiarsilia, Yanisfa; Propika, Jaka; Susanti, Eka; Istiono, Heri
Jurnal Teknik Sipil Vol 6, No 2 (2025)
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jts.2025.v6i2.8511

Abstract

Curing plays a vital role in concrete production, as proper treatment is essential before conducting a compressive strength test to ensure optimal results. Concrete cured in seawater often exhibits different strength characteristics due to the salt content. This study examines the effects of curing with both seawater and freshwater on concrete containing fly ash. The research aims to compare the compressive strength of concrete with fly ash substitution under two different curing conditions. Using an experimental approach, the study incorporated 40% fly ash and 1% polycarboxylate admixture into the concrete mix to target a high compressive strength of K-500. Results indicate that concrete with fly ash cured in seawater achieved an average compressive strength of 807.40 kg/cm² at 28 days, while concrete cured in freshwater reached only 667.94 kg/cm².
Experimental Investigation on Seismic Performance of Precast Column-Foundation Connection using Combined Anchor and Pocket System Propika, Jaka; Pudjisuryadi, Pamuda; Chandra, Jimmy
Civil Engineering Dimension Vol. 28 No. 1 (2026): MARCH 2026
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/ced.28.1.69-82

Abstract

Connections between precast concrete elements play a crucial role in ensuring structural integrity and facilitating effective force transfer. Among various connection types, the column–foundation connection is the most critical component, as it is designed to resist the combined effects of axial load, bending moment, and shear force. In this study, the pocket connection was modified with anchored reinforcement (BPC) to improve seismic performance. An experimental program was conducted on three specimens: a monolithic cast-in-place connection (MC) as the control, a conventional pocket connection (PC), and the modified pocket connection (BPC). Each specimen was subjected to combined axial and cyclic loading to evaluate the seismic performance of the column–foundation connection. The results showed that the MC specimen demonstrated the best performance, while the PC specimen, although meeting the ACI 374.1-05 acceptance criteria, failed to achieve the required probable moment capacity. The BPC specimen demonstrated improvement in seismic performance compared to the PC and was considered suitable for use in precast structural systems designed for seismic area.
Co-Authors Chandra, Jimmy Dewi Pertiwi Dita Kamarul Fitriyah Eka Susanti Indra Komara, Indra Istiono, Heri Jenny Caroline Kurniawan, Mochammad Rizky Kusumaningrum, Dewi Lestari, Laras Laila Pamuda Pudjisuryadi Prasetyo, Agus Edy Puspasari, Aisyah Dwi Ramadhan, Azhar Yusuf Siti Choiriyah Yanisfa Septiarsilia