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All Journal Semesta Teknika Civil Engineering Dimension
Ali Awaludin
Gadjah Mada University
Civil Engineering, Building, Construction & Architecture Engineering

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Journal : Civil Engineering Dimension

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Performance of a Cold Formed Steel Pedestrian Bridge under Static and Dynamic Loads Ali Awaludin; Maria Yasinta Menge Making; muhammad Nur Ikhsan; Yohan Adiyuano
Civil Engineering Dimension Vol. 23 No. 2 (2021): SEPTEMBER 2021
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (794.705 KB) | DOI: 10.9744/ced.23.2.108-114

Abstract

This paper summarizes new application of CFS in bridge constructions where a seven meters long pedestrian bridge was constructed. The bridge has 1.2m width, 0.8m depth, and is composed of CFS Warren truss and bondek floor systems. Natural frequency of the bridge considering only dead load application was found as 8.54 Hz and decreased to 7.08 Hz when the live load was included. Under static load test, the application of dead load only and both dead and live loads yielded a maximum deflection of 3.53 and 8.1 mm, respectively. Normal walking and running pedestrian loads were carried out created a maximum acceleration equaled to 0.11g. Lastly, sinusoidal waves application facilitated through a three-phase induction motor having self-weight of 24.86 kgf at frequency equal to 8.5 Hz was performed for one hour resulting no decrease of the natural frequency, thus the bridge can be assumed to experience no noticeable stiffness degradation.
Stress Analysis of Pin Connections in Steel Box Girder with the Unibridge System using Finite Element Model Ayu Sinta Aprilia; Ali Awaludin; Suprapto Siswosukarto; Ngudiyono Ngudiyono
Civil Engineering Dimension Vol. 26 No. 1 (2024): MARCH 2024
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/ced.26.1.91-100

Abstract

This study analyzes the Unibridge system, a modular steel box girder employing two pins for longitudinal connections, thereby expediting construction compared to traditional girders. A finite element model was developed to analyze the stress on these pins in a single-box girder with five segments and a reinforced concrete floor slab. Various loads were applied following the Indonesian bridge loading standard, SNI 1725:2016. The model considers operational load analysis and assumes full composite behaviour between the top flanges of the girder and the concrete floor slab. The results indicate that the Von-Mises stress on the pins reaches a maximum of 490.95 MPa under combined service loads, consistently remaining below the specified material yield stress limit of 1200 MPa. Consequently, the Demand Capacity Ratio (DCR) is 0.41. As a result, the Unibridge girder connection pins do not experience plastic deformation under the applied loads.
Performance Optimization of Strengthened Slab-on-Pile Structure with Braced Frame Muhammad Firman Hidayat; Ali Awaludin; Bambang Supriyadi
Civil Engineering Dimension Vol. 26 No. 2 (2024): SEPTEMBER 2024
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/ced.26.2.138-150

Abstract

Slab-on-pile (SOP) have been constructed widely in many highway projects in Indonesia as it is preferable in soft-soil sites. This study is aimed to determine the optimal structural configuration by adding braced frame devices to the longitudinal direction of the slab-on-pile structure. The optimization process was carried out to obtain the minimum number of pile configurations, reducing construction costs. A total of three numerical models were compared, namely SOP-A, SOP-B, and SOP-C, representing SOP with configurations of 50 piles, 35 piles, and 35 piles plus thirty braced frames, respectively. The cyclic analysis procedure and structure design were executed based on ACI 374.1 and the Indonesian standard SNI 1725:2016. The results showed that all P-M responses of the SOP-A and SOP-C structures met the cross-section capacity requirements, except for the SOP-B. The addition of braced frames in SOP-C facilitated a 38% energy dissipation improvement and caused a significant reduction of number of the spun piles.
Co-Authors Ashar Saputra Ayu Sinta Aprilia Bambang Supriyadi Bella Lutfiani Al Zakina Maria Yasinta Menge Making Muhammad Firman Hidayat muhammad Nur Ikhsan Ngudiyono Ngudiyono Suprapto Siswosukarto Yohan Adiyuano