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All Journal Jurnal Riset Rekayasa Sipil Journal of the Civil Engineering Forum
Darmawan, M. Fauzi
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Civil Engineering, Building, Construction & Architecture Engineering Environmental Science

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A Cyclic Behavior of Multidirectional Box-Shaped Shearing Damper: Experimental Study Setiawan, Angga Fajar; Awaludin, Ali; Satyarno, Iman; Md Nor, Noorsuhada; Haroki, Yusuf; Darmawan, M. Fauzi; Purnomo, Sidiq; Sumartono, Ignatius Harry
Journal of the Civil Engineering Forum Vol. 11 No. 2 (May 2025)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.14550

Abstract

This paper discusses an experimental study investigating the behavior of the multidirectional box-shaped shearing damper (MBSD) proposed for a bridge structures application. The MBSD consisted of a box-shaped steel plate hot coil (SPHC) material with an effective dimension of 100 x100 mm2 designed to dissipate earthquake excitation energy under combined resultant from longitudinal and transversal directions. The specimens varied with two different web slendernesses, i.e., 58.8 and 27.0. Furthermore, to investigate the different load direction effects, four different loading angles with respect to one of the web planes, i.e., 0°, 15°, 30°, and 45° to be implemented. The specimens were subjected to cyclic loading according to AISC/ANSI 341-22. In the experiment, the shear yield strength, ultimate state behavior, and energy dissipation achievement were evaluated. The result was that MBSD could achieve shear strength and sufficient energy dissipation under different angles of loading direction ranging from yielding to ultimate deformation state. The yielding and ultimate characteristics of MBSD were coincident with the ordinary shear panel damper. A stockier web resulted in a more stable stiffness after the yield point and less buckling of the web but also a slightly earlier strength degradation due to the earlier fracture damage to the welded joint. Finally, the MBSD device had visibility for application on bridge structure as a seismic device by considering appropriate strength and deformation capacity compatibility adjustment with the ultimate displacement limit of 0.11 rad drift angle. In addition, the recommendation for using a better elongation capacity steel material and less welding assembly will improve the behavior and seismic performance of the MBSD.
DESIGN PHASE OF A CYLINDRICAL LONG-SPAN COAL SHED WITH STEEL ARCH SPACE-TRUSS STRUCTURE Setiawan, Angga Fajar; Aminullah, Akhmad; Awaludin, Ali; Gherry, K. T. N.; Adhitama, Y. A.; Darmawan, M. Fauzi
Jurnal Riset Rekayasa Sipil Vol 5, No 2 (2022): Maret 2022
Publisher : Prodi Teknik Sipil Fakultas Teknik Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (548.407 KB) | DOI: 10.20961/jrrs.v5i2.56329

Abstract

This paper discusses the structural design phase of a long-span coal shed structure in a 2x50 MW steam power plant. This study aims to share knowledge on how to design a long-span coal shed structure safely based on the design standards. The main structural system of the coal shed roof is a steel arch space-truss with 120 m of span and 31 m of height above supporting 12.5 m height of reinforced concrete columns. The superstructure contains a roof system and reinforced concrete system. The substructure system consists of a tie beam, pile cap, and bore pile. In the numerical model, all structural members were idealized as frame elements, except the pile cap that to be idealized as shell elements. Then, the soil springs were assigned to the bore pile element nodals with a 1 m interval to simulate the soil-structure interaction. The gravity loads due to dead loads, additional dead loads, live loads, rain loads, and lateral loads due to wind action and earthquakes to be considered. Furthermore, the structural analysis was conducted with non-linear geometric to simulate the large displacement effects and tension only element of the wind bracing. In addition, a simplified method to estimate the structural stability under lateral load was conducted. Based on the structural analysis and structural design, the coal shed structure could fulfill the safety criteria in terms of ultimate and serviceability limit based on the design code criteria. Furthermore, the non-linear geometry and stability issue should be considered with an appropriate structural analysis method.
Co-Authors Adhitama, Y. A. Ali Awaludin Aminullah, Akhmad Gherry, K. T. N. Haroki, Yusuf Iman Satyarno Md Nor, Noorsuhada Purnomo, Sidiq Setiawan, Angga Fajar Sumartono, Ignatius Harry