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All Journal Journal of Civil Engineering and Planning (JCEP) Equivalent: Jurnal Ilmiah Sosial Teknik
Goldelfridus Alfredo Abani
Universitas Katolik Widya Mandira
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Social Sciences Transportation

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Analysis of Lateral Force and Base Shear Due to Earthquake Loads Based on Yield Point Spectra Goldelfridus Alfredo Abani; Krisantos Ria Bela; Krisantus Satrio Wibowo Pedo
Journal of Civil Engineering and Planning (JCEP) Vol. 5 No. 1 (2024)
Publisher : Program Studi Sarjana Teknik Sipil Universitas Internasional Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37253/jcep.v5i1.9105

Abstract

Earthquakes pose a significant challenge in structural engineering, as they expose buildings to strong lateral forces that can cause severe damage or even collapse. One important aspect of this analysis is to determine the lateral forces and base shear acting on the structure. The purpose of this study is to obtain the values of lateral forces and base shear in structures using the yield point spectra method. The yield point spectra is a graph that relates the yield shear strength coefficient (Cy) and the displacement at yield (Δy) with a certain ductility, Aschheim and Black (2000). The calculation results show that the base level shear determined using the yield point spectrum is smaller Viβ = 1599.93 kN compared to the base level shear obtained using SNI 1726-2019 which is greater Vi = 1656.57 kN. The level shear value at the top level with the equation suggested by Chao et al. (2007) and the Building Seismic Safety Council (2009) is higher by Fi,β = 640.56 kN, compared to the level shear value determined using SNI 1726-2019, smaller Fi = 444.75 kN according to the level shear value based on the shear ratio. It can be concluded that the smaller the base shear and upper level shear in the building structure, the smaller the risk of damage or collapse of the structure due to earthquakes.
Analysis Flow Velocity and Flow Type Characterization of Noelmina River (Case Study: KM 62.3 Timor Raya Road) Sri Santi L. M. F Seran; Azarya Bees; Gregorius Paus Usboko; Wenceslaus Reinaldo Fernandez; Goldelfridus Alfredo Abani
Equivalent: Jurnal Ilmiah Sosial Teknik Vol. 8 No. 3 (2026): Equivalent: Jurnal Ilmiah Sosial Teknik
Publisher : Politeknik Siber Cerdika Internasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59261/jequi.v8i3.361

Abstract

Background: River flow characteristics play a crucial role in controlling erosion processes, especially in river segments adjacent to infrastructure. The Noelmina River at Km 62.3 Timor Raya Road experiences repeated bank erosion that threatens road stability and nearby public facilities. Objective: This study aims to analyze flow velocity, determine flow characteristics using the Froude and Reynolds numbers, and recommend appropriate riverbank protection structures to reduce erosion risk. Methods: A quantitative field survey was conducted at three observation points (upstream, bend, and downstream). Flow velocity was measured using a current meter at different depth intervals. Hydraulic characteristics were analyzed using average velocity calculations, the Froude number for flow regime classification, and the Reynolds number for flow-type determination. Results: The average flow velocities were 2.298 m/s (Point 1), 1.686 m/s (Point 2), and 1.062 m/s (Point 3), showing a decreasing trend along the river segment. All Froude numbers were below 1, indicating subcritical flow conditions. Reynolds number analysis showed transitional flow at Points 1 and 2, and laminar flow at Point 3. Higher velocities at the river bend indicate greater erosion potential. Conclusion: The river exhibits subcritical flow with varying transitional and laminar characteristics. Recommended mitigation measures include gabions, interlocking concrete blocks, retaining walls, and weirs to reduce flow energy and prevent further bank erosion.
Co-Authors Azarya Bees Gregorius Paus Usboko Krisantos Ria Bela Krisantus Satrio Wibowo Pedo Sri Santi L. M. F Seran Wenceslaus Reinaldo Fernandez