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All Journal Jurnal Teknik Sipil Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Retensi
Innino Nino Justitiannisa
Polnep
Civil Engineering, Building, Construction & Architecture Engineering Transportation

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Cycle Tests and Structure Repair of Bridge Pier Models: Uji Siklus dan Perbaikan Struktur Model Pilar Jembatan Justitiannisa, Innino; Gunadi, Riawan
Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Vol. 12 No. 2 (2023): Cantilever
Publisher : Department of Civil Engineering and Planning, Faculty of Engineering, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35139/cantilever.v12i2.234

Abstract

This research was conducted in anticipation of the risk of fatal damage to the structure due to the earthquake. In this study, experiments were carried out on the test object in the form of a bridge pillar model, which consisted of 2 test steps. The cyclic test is in the form of a pier bridge model and is continued in step 2 in the form of repairs with grouting and carbon wrapping materials as well as conducting another cyclic test to evaluate the performance of the repair materials used. This study uses the pier model, which consists of two test objects, namely a column with dimensions of 0.25x0.25x1.68 meters and a column cap of 1.20x0.55x0.36 meters. This test provides a constant axial load of 0.2 fc’.Ag and a cyclic lateral load. Phase 1 testing was carried out until the drift ratio was 3.5%. The achieved lateral peak strength is 8,606 tonf with a drift ratio of 2.20%. Lateral strength experienced a decrease in peak lateral strength of 86.93%. The damage is dominated by shear cracks which are characterized by the number of cracks with a diagonal pattern. Structural performance analysis was carried out according to ACI 374.1-05. The results of the theoretical analysis of the peak strength of the pier model were 15.2144 tonnes in the tensile direction, while the experimental ones were 8.606 in the pushing direction and -7.812 in the pulling direction.
Perancangan Struktur Apartemen 15 Lantai Dengan Menggunakan Beton Bertulang di Jl.Jendral Ahmad Yani, Kota Pontianak,Kalimantan Barat Justitiannisa, Innino Nino
RETENSI Vol. 1 No. 2 (2021): Retensi
Publisher : Jurusan Teknik Sipil Polnep

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31573/retensi.v1i2.254

Abstract

The increasing need for housing from year to year is increasing. The increase in population is the main factor and the availability of land is not supported. Based on the Pontianak City Spatial Plan 2013 - 2033, the land requirement for housing reaches 4580.31 hectares. Vertical development, namely apartments, aims to save land use and still be able to meet large numbers of residential needs. This apartment planning uses standards according to SNI 03-2847-2002 with the use of SAP 2000 software program. Site plan design, drawing desing and structural calculations in designing this apartement. This apartement design aims to produce apartement structures with reinforced concrete that are sturdy, safe, amda economical. Planning for this apartment starts from site plan planning, drawing design, spatial planning, floor slabs, internal forces, and foundation. In the preparation of this final project, quantitative methods are used, and primary and secondary data collection. The specifications for the construction of the apartment use reinforced concrete, using pile foundations, dak roofs, fc '30, and fy 400. 12 cm; 2 types of main beam and beam size, each measuring 55 cm x 45 cm, 50 cm x 40 cm, 45 cm x 35 cm, and 35 cm x 30 cm; 3 types of sizes, respectively 65 cm x 65 cm, 60 cm x 60 cm, and 50 cm x 50 cm; and 3 types of foundation with different number of piles, namely 9, 12, 20, and 24 pile points.
Experimental Study of Polymer Concrete Material with SBR Latex for Bridge Pier: Compressive Test, Tensile Test, and Workability on Cylinder and Steel Samples Justitiannisa, Innino; Gunadi, Riawan
Jurnal Teknik Sipil Vol 25, No 2 (2025): Vol 25, No 2 (2025): JURNAL TEKNIK SIPIL EDISI MEI 2025
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v25i2.91523

Abstract

Concrete is a fundamental material in civil engineering structures due to its high compressive strength and durability. However, its low tensile strength, high permeability, and tendency to crack under environmental and mechanical stress limit its long-term performance, especially in substructures such as bridge piers exposed to dynamic and aggressive conditions. This study investigates the effect of incorporating 10% Styrene-Butadiene Rubber (SBR) Latex by weight into a polymer-modified concrete mix. The objective is to evaluate its mechanical behavior and workability as a preliminary step toward application in full-scale bridge pier construction. The concrete was designed using the Ohama method, which considers the interaction between polymer content and water"“cement ratio, while a dry-mix method was adopted to ensure uniformity and ease of implementation in field applications. Laboratory testing was conducted to evaluate the compressive strength at curing ages of 3, 7, and 28 days using cylindrical specimens (150 mm × 300 mm). The tensile strength of reinforcing bars (Ø8 mm, Ø10 mm, and Ø16 mm) was evaluated using a Universal Testing Machine (UTM), while slump testing was conducted to determine workability. The results showed that the modified concrete reached a compressive strength of 29.86 MPa at 28 days, or 99.53% of the target strength (f"²c = 30 MPa). A slump value of 12 cm indicated improved cohesion and workability, while tensile tests confirmed the reinforcement"™s structural performance. A bridge pier prototype was also developed, with a column size of 0.25 × 0.25 × 1.68 m and a column head of 1.20 × 0.55 × 0.36 m. Overall, the incorporation of 10% SBR latex enhanced the mechanical and rheological properties of concrete, supporting its potential for use in durable bridge pier applications.
Silica Fume and Aluminum Powder Effects on Strength and Porosity of Pervious Concrete under Peat and PDAM Curing Hariyani, Susi; Nizar, Nizar; Justitiannisa, Innino
Jurnal Teknik Sipil Vol 26, No 1 (2026): Jurnal Teknik Sipil Universitas Tanjungpura
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v26i1.104081

Abstract

Pervious concrete used in peatland environments is susceptible to durability loss due to acidic, organic-rich exposure that alters its pore structure and matrix integrity. This study evaluates the effects of silica fume (SF) and aluminum powder (AP) on the compressive strength and porosity of pervious concrete under two curing media: PDAM water and peat water. SF contents ranging from 0–10% and AP contents from 0–0.9% by cement weight were investigated. Compressive strength and porosity tests were conducted at 28 and 56 days to assess mechanical and physical performance, whereas durability trends were interpreted through microstructural considerations. The results indicate that PDAM water curing yields higher strength and lower porosity compared with peat water curing. SF incorporation enhances matrix densification through pozzolanic reactions, reducing pore connectivity, whereas appropriate AP dosages help stabilize the internal pore network. The optimal mixture achieved a compressive strength of 50.88 kg/cm² and porosity of 16.98%. Even under aggressive peat-water curing, modified mixtures exhibited improved performance, suggesting greater durability potential.
Co-Authors Hariyani, Susi Nizar Nizar Riawan Gunadi