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All Journal Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil BANGUN REKAPRIMA
Vera Mahardika
Politeknik Negeri Semarang
Humanities Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Engineering Transportation Other

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ANALISIS KAJIAN STRUKTUR DESAIN TERHADAP MUTU EXISTING PADA PENAMPANG NON PRISMATIC GABLE FRAME PT UNIMOTOR TECHNOLOGY INDONESIA Teguh Mulyo Wicaksono; Moh. Abduh; Dwi Respono Adhi; Ridho Wicaksono; Puspa Anandhita Fristio; Vera Mahardika; Rajna Maulia Dwi Rahma
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol. 31 No. 1 (2026): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v31i1.7529

Abstract

The use of non-prismatic gable frame steel structures is common in industrial buildings due to their structural efficiency. However, their performance depends significantly on the quality of the steel material. This study evaluates the mechanical properties of Chinese structural steel grade Q355B (GB/T 1591-2018) and assesses its structural performance in a non-prismatic gable frame system at PT Unimotor Technology Indonesia. A quantitative approach was employed through laboratory testing using the Brinell and Rebound methods to determine steel hardness and ultimate tensile strength (Fu). The test results showed a minimum Fu value of 495 MPa. Nevertheless, conservative design properties specified for Q355B steel (Fy = 355 MPa and Fu = 470 MPa) were adopted in the structural analysis. A three-dimensional model was developed using CSI ETABS V.21.0 to represent the non-prismatic gable frame geometry. Structural analysis was conducted in accordance with SNI 1727:2020, SNI 1726:2019, and LRFD load combinations, considering dead, live, wind, and seismic loads. The results indicate that all structural members satisfy the required strength criteria. The maximum flexural–shear interaction ratio was 0.601, while the flexural–compression interaction ratio was 0.57, both below the allowable limit of 1.0. The structure also met the requirements for lateral-torsional buckling resistance. Based on the analysis, the non-prismatic gable frame system using Q355B steel is structurally safe and complies with the requirements of SNI 1729:2020.
KAJIAN KARAKTERISTIK LALU LINTAS DAN EVALUASI ALTERNATIF PENINGKATAN KAPASITAS RUAS JALAN MAJAPAHIT KOTA SEMARANG (STUDI KASUS : SEGMEN JALAN DEPAN POLSEK PEDURUNGAN SAMPAI PASAR PENGGARON): KAJIAN KARAKTERISTIK LALU LINTAS DAN EVALUASI ALTERNATIF PENINGKATAN KAPASITAS RUAS JALAN MAJAPAHIT KOTA SEMARANG (STUDI KASUS : SEGMEN JALAN DEPAN POLSEK PEDURUNGAN SAMPAI PASAR PENGGARON) Muhamad Khudza Alfi Himam; Tjokro Hadi; Vera Mahardika; Fajar Jati Nugroho; Muhammad Reza Pahlevi; Lalu Yahya Surya Buana; Imam Nurhadi
Bangun Rekaprima Vol. 12 No. 1 (2026): April 2026
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/bangunrekaprima.v12i1.7634

Abstract

In the urban transportation system, Semarang is one of the cities with a high level of vehicle density, causing traffic congestion. This is also compounded by side obstacles, such as vehicles entering and exiting, stopped vehicles, parking on the roadside, pedestrians, and pedestrians. The Majapahit Road section is one of the intercity connecting roads. Thus, this road plays a very important role in serving a fairly large traffic flow. So that on this Majapahit Road section often experiences congestion that occurs not only at certain hours, because on this road section congestion is also caused by the presence of shopping centers, education, and shops. The important role of Majapahit Road results in vehicle queues and traffic delays, vehicle buildup, travel time delays (delays), and a decrease in the level of road service. Analysis of the performance of urban road sections, with performance indicators namely traffic flow (Q), capacity (C), degree of saturation (DS), free flow speed which is carried out with various performance indicators namely free flow speed (FV), as well as analyzing the level of service (Level of Service / LOS) on the road section. Based on calculations and analysis of this road segment in August 2025, the traffic flow (Q) value was 3,863.55 pcu/hour, the capacity value (C) was 2,821, and the degree of saturation (DS) was 1.37, exceeding 1. These values do not meet the required conditions. The free flow speed (FV) was 37.26 km/hour, and the level of service (LOS) was categorized as level F. Based on the calculation results in 2025, solutions/alternatives are needed to reduce the degree of saturation (DS) value by increasing the capacity value.
Co-Authors Dwi Respono Adhi Fajar Jati Nugroho Imam Nurhadi Lalu Yahya Surya Buana Moh. Abduh Muhamad Khudza Alfi Himam Muhammad Reza Pahlevi Puspa Anandhita Fristio Rajna Maulia Dwi Rahma Ridho Wicaksono Teguh Mulyo Wicaksono Tjokro Hadi