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Rahmanto, Fiqih
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Civil Engineering, Building, Construction & Architecture

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Evaluating the Performance of HEC-RAS in Simulating Strongly Nonlinear and Dispersive Wave Propagation Rahmanto, Fiqih; Wicaksono, Albert
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.v25i2.92675

Abstract

Understanding wave propagation, particularly in shallow water where nonlinear and dispersive effects become prominent, is essential for achieving accurate hydraulic modeling. HEC-RAS is a widely utilized computational tool in engineering applications for simulating open channel flows, predominantly under the assumption of hydrostatic pressure. This study investigates the capability of HEC-RAS to simulate wave propagation under conditions characterized by strong nonlinearity and dispersion. To conduct this evaluation, three benchmark scenarios were modeled: (1) solitary wave propagation in a flat, frictionless channel, (2) interaction of a solitary wave with a submerged bar, based on experimental data, and (3) regular wave propagation. Each case was simulated using HEC-RAS and the results were compared against analytical solutions or experimental observations. The findings indicate that HEC-RAS exhibits notable limitations in accurately representing wave phenomena dominated by nonlinear and dispersive effects. These limitations are primarily attributed to the shallow water equations implemented in the model, which omit non-hydrostatic pressure components. Such components are critical for maintaining wave shape and amplitude, particularly over variable bathymetry. In conclusion, while HEC-RAS remains a robust and reliable tool for conventional flow modeling, it is not well-suited for scenarios involving strongly nonlinear and dispersive wave propagation. For such cases, alternative modeling approaches that incorporate non-hydrostatic pressure effects are recommended to ensure greater simulation accuracy.
THE CALCULATION OF THE BUILDING STRUCTURE OF INSTITUT TEKNOLOGI DAN BISNIS SABDA SETIA KOTA PONTIANAK Rahmanto, Fiqih; Elvira, Elvira; Supriyadi, Asep
Jurnal Teknik Sipil Vol 23, No 1 (2023): JURNAL TEKNIK SIPIL EDISI FEBRUARI 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtst.v23i1.60406

Abstract

The publishing of the new Indonesian seismic code SNI-1729-2019, which was just issued at the end of 2017, is one example of how laws controlling building construction have been changed to keep up with the times, which is the earth study result by Pusat Studi Gempa Nasional (PUSGEN) update includes incorporating a new source of an earthquake, new active faults, more accurate topography map, and earthquake catalog. One of the new seismic zones in the SNI is Pontianak, so in planning buildings in Pontianak, earthquake force parameters must be calculated so that in the event of an earthquake, anticipatory measures can be taken so as not to cause significant losses. This study is planning the structure of Institut Teknologi dan Bisnis Sabda Setia Kota Pontianak building, which refers to the Indonesian seismic code SNI-1729-2019.  The structural analysis is carried out using the help of a structural analysis program adjusted to the value of the planned structural dimensions, which are floor slabs with a thickness of 100 mm, main beams 350/700 mm, child beams 300/600 mm and 250/500 mm, to columns K1 D-800 mm and K2 500×500 mm.
Co-Authors Albert Wicaksono Asep Supriyadi Elvira Elvira