Evaluasi Kinerja Struktural Tiang Listrik Berbasis High-Volume Fly Ash Berdasarkan Variasi Tulangan Spiral Menggunakan Finite Element

Halisah, Vonny Nur (2026) Evaluasi Kinerja Struktural Tiang Listrik Berbasis High-Volume Fly Ash Berdasarkan Variasi Tulangan Spiral Menggunakan Finite Element. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Tiang listrik beton pratekan berperan penting sebagai elemen penopang jaringan distribusi listrik, sehingga kinerja strukturalnya harus tetap andal meskipun material penyusunnya diarahkan menjadi lebih ramah lingkungan, misalnya melalui penggunaan beton berbasis High Volume Fly Ash (HVFA). Namun, pengaruh variasi konfigurasi tulangan spiral terhadap perilaku struktural tiang listrik beton pratekan HVFA tipe SUTM 12-200 daN belum banyak dikaji, khususnya terkait hubungan beban-perpindahan, tegangan spiral, pola retak, dan kapasitas geser spiral. Berdasarkan permasalahan tersebut, penelitian ini bertujuan menganalisis pengaruh variasi konfigurasi spiral terhadap keempat aspek tersebut melalui pemodelan numerik metode elemen hingga menggunakan perangkat lunak ATENA Studio dengan GiD sebagai preprocessor, pada tiga variasi jarak tulangan spiral, yaitu T12-V1 (50 mm), T12-V2 (75 mm), dan T12-V3 (100 mm). Properti material beton dan baja tulangan yang digunakan mengacu pada hasil pengujian eksperimental spesimen C1 dan C2, dengan analisis dilakukan hingga tahap beban ultimit, mengacu pada standar SPLN D3.019-2:2021 dan ACI 318-19. Hasil penelitian menunjukkan bahwa variasi jarak tulangan spiral tidak memberikan pengaruh signifikan terhadap hubungan beban-perpindahan pada tahap elastis, dengan selisih lendutan antar-variasi konsisten di bawah 1 mm hingga Stage 3. Pengaruhnya baru terlihat nyata menjelang beban ultimit, ditandai dengan kegagalan konvergensi pada model T12-V2 sebelum mencapai beban maksimum yang dicapai T12-V1 dan T12-V3. Tegangan Von Mises maksimum pada tulangan spiral, yaitu 385,7 MPa untuk T12-V1, 360,6 MPa untuk T12-V2, dan 367,0 MPa untuk T12-V3, tetap berada di bawah tegangan leleh (fy = 390 MPa), sehingga keruntuhan tiang pada ketiga variasi dikendalikan oleh kehancuran beton, bukan oleh leleh tulangan spiral. Lebar retak maksimum bervariasi mengikuti urutan T12-V3 > T12-V1 > T12-V2, sedangkan kapasitas geser total (Vn) menurun secara konsisten seiring bertambahnya spasi spiral, dari 46.516,13 N pada T12-V1 hingga 29.306,48 N pada T12-V3, sehingga konfigurasi spiral yang lebih rapat terbukti secara signifikan meningkatkan kapasitas geser tiang listrik beton pratekan HVFA.
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Prestressed concrete utility poles serve as critical supporting elements in electrical distribution networks, so their structural performance must remain reliable even as concrete constituents shift toward more sustainable alternatives such as High Volume Fly Ash (HVFA) concrete. However, the influence of spiral reinforcement configuration on the structural behavior of HVFA-based prestressed concrete utility poles of the SUTM 12-200 daN type has not been extensively examined, particularly regarding the load-displacement relationship, spiral stress, crack patterns, and spiral shear capacity. This study therefore analyzes the influence of stirrup configuration variation on these four aspects through finite element modeling using ATENA Studio with GiD as the preprocessor, across three spiral spacing variations: T12-V1 (50 mm), T12-V2 (75 mm), and T12-V3 (100 mm). Material properties were derived from experimental testing of specimens C1 and C2, with analysis carried out up to the ultimate load stage, referring to SPLN D3.019-2:2021 and ACI 318-19. The results show that spiral spacing variation had no significant effect on the load-displacement relationship during the elastic stage, with deflection differences among variations consistently below 1 mm through Stage 3. The influence became more pronounced near the ultimate load, marked by a convergence failure in the T12-V2 model before reaching the maximum load attained by T12-V1 and T12-V3. The maximum Von Mises stress in the spiral reinforcement, namely 385.7 MPa for T12-V1, 360.6 MPa for T12-V2, and 367.0 MPa for T12-V3, remained below the yield stress (fy = 390 MPa), indicating that failure was governed by concrete crushing rather than spiral yielding. Maximum crack widths followed the order T12-V3 > T12-V1 > T12-V2, while total shear capacity (Vn) decreased consistently with increasing spiral spacing, from 46,516.13 N for T12-V1 to 29,306.48 N for T12-V3, confirming that tighter spiral spacing significantly increases the shear capacity of HVFA prestressed concrete utility poles.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	ATENA, geser, HVFA, spiral, tiang listrik, ATENA, concrete utility pole, FEM, HVFA, spiral
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method T Technology > TA Engineering (General). Civil engineering (General) > TA444 Reinforced concrete T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering) T Technology > TA Engineering (General). Civil engineering (General) > TA658 Structural design
Divisions:	Faculty of Vocational > 22301-Civil Infrastructure Engineering (D4)
Depositing User:	Vonny Nur Halisah
Date Deposited:	04 Aug 2026 01:28
Last Modified:	04 Aug 2026 01:28
URI:	http://repository.its.ac.id/id/eprint/142538

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